correction (#996)

Co-authored-by: Johannes Ibald <johannes.ibald@etes.de>

ADOPTERS.md

@@ -14,6 +14,7 @@ Feel free to open a Pull-Request to get yours listed.
 | Vendor | DCloud | 2024 | [link](https://dcloud.co.id) | DCloud is an Indonesian Cloud Provider using Kamaji to build and offer [Managed Kubernetes Service](https://dcloud.co.id/dkubes.html). |
 | Vendor | Dinova | 2025 | [link](https://dinova.one/) | Dinova is an Italian cloud services provider that integrates Kamaji in its datacenters to offer fully managed Kubernetes clusters. |
 | End-user | KINX | 2024 | [link](https://kinx.net/?lang=en) | KINX is an Internet infrastructure service provider and will use kamaji for its new [Managed Kubernetes Service](https://kinx.net/service/cloud/kubernetes/intro/?lang=en). |
+| Vendor | Netalia | 2025 | [link](https://www.netalia.it) | Netalia uses Kamaji for the Italian cloud 
 | Vendor | Netsons | 2023 | [link](https://www.netsons.com) | Netsons is an Italian hosting and cloud provider and uses Kamaji in its [Managed Kubernetes](https://www.netsons.com/kubernetes) offering. |
 | Vendor | NVIDIA | 2024 | [link](https://github.com/NVIDIA/doca-platform) | DOCA Platform Framework manages provisioning and service orchestration for NVIDIA Bluefield DPUs. |
 | R&D | Orange | 2024 | [link](https://gitlab.com/Orange-OpenSource/kanod) | Orange is a French telecommunications company using Kamaji for experimental research purpose, with Kanod research solution. |

Makefile

@@ -131,12 +131,14 @@ webhook: controller-gen yq
 crds: controller-gen yq
 	# kamaji chart
 	$(CONTROLLER_GEN) crd webhook paths="./..." output:stdout | $(YQ) 'select(documentIndex == 0)' > ./charts/kamaji/crds/kamaji.clastix.io_datastores.yaml
-	$(CONTROLLER_GEN) crd webhook paths="./..." output:stdout | $(YQ) 'select(documentIndex == 1)' > ./charts/kamaji/crds/kamaji.clastix.io_tenantcontrolplanes.yaml
+	$(CONTROLLER_GEN) crd webhook paths="./..." output:stdout | $(YQ) 'select(documentIndex == 1)' > ./charts/kamaji/crds/kamaji.clastix.io_kubeconfiggenerators.yaml
+	$(CONTROLLER_GEN) crd webhook paths="./..." output:stdout | $(YQ) 'select(documentIndex == 2)' > ./charts/kamaji/crds/kamaji.clastix.io_tenantcontrolplanes.yaml
 	$(YQ) -i '. *n load("./charts/kamaji/controller-gen/crd-conversion.yaml")' ./charts/kamaji/crds/kamaji.clastix.io_tenantcontrolplanes.yaml
 	# kamaji-crds chart
 	cp ./charts/kamaji/controller-gen/crd-conversion.yaml ./charts/kamaji-crds/hack/crd-conversion.yaml
 	$(YQ) '.spec' ./charts/kamaji/crds/kamaji.clastix.io_datastores.yaml > ./charts/kamaji-crds/hack/kamaji.clastix.io_datastores_spec.yaml
 	$(YQ) '.spec' ./charts/kamaji/crds/kamaji.clastix.io_tenantcontrolplanes.yaml > ./charts/kamaji-crds/hack/kamaji.clastix.io_tenantcontrolplanes_spec.yaml
+	$(YQ) '.spec' ./charts/kamaji/crds/kamaji.clastix.io_kubeconfiggenerators.yaml > ./charts/kamaji-crds/hack/kamaji.clastix.io_kubeconfiggenerators_spec.yaml
 	$(YQ) -i '.conversion.webhook.clientConfig.service.name = "{{ .Values.kamajiService }}"' ./charts/kamaji-crds/hack/kamaji.clastix.io_tenantcontrolplanes_spec.yaml
 	$(YQ) -i '.conversion.webhook.clientConfig.service.namespace = "{{ .Values.kamajiNamespace }}"' ./charts/kamaji-crds/hack/kamaji.clastix.io_tenantcontrolplanes_spec.yaml
 

PROJECT

@@ -7,6 +7,15 @@ plugins:
 projectName: operator
 repo: github.com/clastix/kamaji
 resources:
+- api:
+    crdVersion: v1
+    namespaced: false
+  controller: true
+  domain: clastix.io
+  group: kamaji
+  kind: KubeconfigGenerator
+  path: github.com/clastix/kamaji/api/v1alpha1
+  version: v1alpha1
 - api:
     crdVersion: v1
     namespaced: true

README.md

@@ -123,6 +123,8 @@ Since Kamaji is just focusing on the Control Plane a [Kamaji's Cluster API Contr
 - YouTube ▶️ [Rancher & Kamaji: solving multitenancy challenges in the Kubernetes world](https://www.youtube.com/watch?v=VXHNrMmlF8U)
 - YouTube ▶️ [Enabling Self-Service Kubernetes clusters with Kamaji and Paralus](https://www.youtube.com/watch?v=JWA2LwZazM0)
 - YouTube ▶️ [Hosted Control Plane on Kubernetes (HPC) with Kamaji and K0mostron by Hervé Leclerc, ALTER WAY](https://www.youtube.com/watch?v=vmRdE2ngn78)
+- Medium 📖 [Set up Virtual Control Planes with Kamaji on Minikube, by Ben Soer](https://medium.com/@bensoer/set-up-virtual-control-planes-with-kamaji-on-minikube-a540be0275aa)
+- Hands-On tutorial 📖 [How to build your own managed Kubernetes service on Hetzner Cloud, by Hans Jörg Wieland](https://wieland.tech/blog/kamaji-cluster-api-and-etcd)
 
 ### 🏷️ Versioning
 

api/v1alpha1/kubeconfiggenerator_types.go

@@ -0,0 +1,91 @@
+// Copyright 2022 Clastix Labs
+// SPDX-License-Identifier: Apache-2.0
+
+package v1alpha1
+
+import (
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+var (
+	ManagedByLabel  = "kamaji.clastix.io/managed-by"
+	ManagedForLabel = "kamaji.clastix.io/managed-for"
+)
+
+//+kubebuilder:object:root=true
+//+kubebuilder:subresource:status
+//+kubebuilder:printcolumn:name="Age",type="date",JSONPath=".metadata.creationTimestamp",description="Age"
+//+kubebuilder:metadata:annotations={"cert-manager.io/inject-ca-from=kamaji-system/kamaji-serving-cert"}
+//+kubebuilder:resource:scope=Cluster,shortName=kc,categories=kamaji
+
+// KubeconfigGenerator is the Schema for the kubeconfiggenerators API.
+type KubeconfigGenerator struct {
+	metav1.TypeMeta   `json:",inline"`
+	metav1.ObjectMeta `json:"metadata,omitempty"`
+
+	Spec   KubeconfigGeneratorSpec   `json:"spec,omitempty"`
+	Status KubeconfigGeneratorStatus `json:"status,omitempty"`
+}
+
+// CompoundValue allows defining a static, or a dynamic value.
+// Options are mutually exclusive, just one should be picked up.
+// +kubebuilder:validation:XValidation:rule="(has(self.stringValue) || has(self.fromDefinition)) && !(has(self.stringValue) && has(self.fromDefinition))",message="Either stringValue or fromDefinition must be set, but not both."
+type CompoundValue struct {
+	// StringValue is a static string value.
+	StringValue string `json:"stringValue,omitempty"`
+	// FromDefinition is used to generate a dynamic value,
+	// it uses the dot notation to access fields from the referenced TenantControlPlane object:
+	// e.g.: metadata.name
+	FromDefinition string `json:"fromDefinition,omitempty"`
+}
+
+type KubeconfigGeneratorSpec struct {
+	// NamespaceSelector is used to filter Namespaces from which the generator should extract TenantControlPlane objects.
+	NamespaceSelector metav1.LabelSelector `json:"namespaceSelector,omitempty"`
+	// TenantControlPlaneSelector is used to filter the TenantControlPlane objects that should be address by the generator.
+	TenantControlPlaneSelector metav1.LabelSelector `json:"tenantControlPlaneSelector,omitempty"`
+	// Groups is resolved a set of strings used to assign the x509 organisations field.
+	// It will be recognised by Kubernetes as user groups.
+	Groups []CompoundValue `json:"groups,omitempty"`
+	// User resolves to a string to identify the client, assigned to the x509 Common Name field.
+	User CompoundValue `json:"user"`
+	// ControlPlaneEndpointFrom is the key used to extract the Tenant Control Plane endpoint that must be used by the generator.
+	// The targeted Secret is the `${TCP}-admin-kubeconfig` one, default to `admin.svc`.
+	//+kubebuilder:default="admin.svc"
+	ControlPlaneEndpointFrom string `json:"controlPlaneEndpointFrom,omitempty"`
+}
+
+type KubeconfigGeneratorStatusError struct {
+	// Resource is the Namespaced name of the errored resource.
+	//+kubebuilder:validation:Required
+	Resource string `json:"resource"`
+	// Message is the error message recorded upon the last generator run.
+	//+kubebuilder:validation:Required
+	Message string `json:"message"`
+}
+
+// KubeconfigGeneratorStatus defines the observed state of KubeconfigGenerator.
+type KubeconfigGeneratorStatus struct {
+	// Resources is the sum of targeted TenantControlPlane objects.
+	//+kubebuilder:default=0
+	Resources int `json:"resources"`
+	// AvailableResources is the sum of successfully generated resources.
+	// In case of a different value compared to Resources, check the field errors.
+	//+kubebuilder:default=0
+	AvailableResources int `json:"availableResources"`
+	// Errors is the list of failed kubeconfig generations.
+	Errors []KubeconfigGeneratorStatusError `json:"errors,omitempty"`
+}
+
+//+kubebuilder:object:root=true
+
+// KubeconfigGeneratorList contains a list of TenantControlPlane.
+type KubeconfigGeneratorList struct {
+	metav1.TypeMeta `json:",inline"`
+	metav1.ListMeta `json:"metadata,omitempty"`
+	Items           []KubeconfigGenerator `json:"items"`
+}
+
+func init() {
+	SchemeBuilder.Register(&KubeconfigGenerator{}, &KubeconfigGeneratorList{})
+}

api/v1alpha1/tenantcontrolplane_status.go

@@ -189,12 +189,14 @@ type KubernetesStatus struct {
 	Ingress    *KubernetesIngressStatus   `json:"ingress,omitempty"`
 }
 
-// +kubebuilder:validation:Enum=Provisioning;CertificateAuthorityRotating;Upgrading;Migrating;Ready;NotReady;Sleeping
+// +kubebuilder:validation:Enum=Unknown;Provisioning;CertificateAuthorityRotating;Upgrading;Migrating;Ready;NotReady;Sleeping;WriteLimited
 type KubernetesVersionStatus string
 
 var (
+	VersionUnknown      KubernetesVersionStatus = "Unknown"
 	VersionProvisioning KubernetesVersionStatus = "Provisioning"
 	VersionSleeping     KubernetesVersionStatus = "Sleeping"
+	VersionWriteLimited KubernetesVersionStatus = "WriteLimited"
 	VersionCARotating   KubernetesVersionStatus = "CertificateAuthorityRotating"
 	VersionUpgrading    KubernetesVersionStatus = "Upgrading"
 	VersionMigrating    KubernetesVersionStatus = "Migrating"

api/v1alpha1/tenantcontrolplane_types.go

@@ -297,6 +297,20 @@ type AddonsSpec struct {
 	KubeProxy *AddonSpec `json:"kubeProxy,omitempty"`
 }
 
+type Permissions struct {
+	BlockCreate bool `json:"blockCreation,omitempty"`
+	BlockUpdate bool `json:"blockUpdate,omitempty"`
+	BlockDelete bool `json:"blockDeletion,omitempty"`
+}
+
+func (p *Permissions) HasAnyLimitation() bool {
+	if p.BlockCreate || p.BlockUpdate || p.BlockDelete {
+		return true
+	}
+
+	return false
+}
+
 // TenantControlPlaneSpec defines the desired state of TenantControlPlane.
 // +kubebuilder:validation:XValidation:rule="!has(oldSelf.dataStore) || has(self.dataStore)", message="unsetting the dataStore is not supported"
 // +kubebuilder:validation:XValidation:rule="!has(oldSelf.dataStoreSchema) || has(self.dataStoreSchema)", message="unsetting the dataStoreSchema is not supported"
@@ -306,6 +320,13 @@ type AddonsSpec struct {
 // +kubebuilder:validation:XValidation:rule="self.controlPlane.service.serviceType != 'LoadBalancer' || (oldSelf.controlPlane.service.serviceType != 'LoadBalancer' && self.controlPlane.service.serviceType == 'LoadBalancer') || has(self.networkProfile.loadBalancerClass) == has(oldSelf.networkProfile.loadBalancerClass)",message="LoadBalancerClass cannot be set or unset at runtime"
 
 type TenantControlPlaneSpec struct {
+	// WritePermissions allows to select which operations (create, delete, update) must be blocked:
+	// by default, all actions are allowed, and API Server can write to its Datastore.
+	//
+	// By blocking all actions, the Tenant Control Plane can enter in a Read Only mode:
+	// this phase can be used to prevent Datastore quota exhaustion or for your own business logic
+	// (e.g.: blocking creation and update, but allowing deletion to "clean up" space).
+	WritePermissions Permissions `json:"writePermissions,omitempty"`
 	// DataStore specifies the DataStore that should be used to store the Kubernetes data for the given Tenant Control Plane.
 	// When Kamaji runs with the default DataStore flag, all empty values will inherit the default value.
 	// By leaving it empty and running Kamaji with no default DataStore flag, it is possible to achieve automatic assignment to a specific DataStore object.

api/v1alpha1/zz_generated.deepcopy.go

@@ -289,6 +289,21 @@ func (in *ClientCertificate) DeepCopy() *ClientCertificate {
 	return out
 }
 
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *CompoundValue) DeepCopyInto(out *CompoundValue) {
+	*out = *in
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new CompoundValue.
+func (in *CompoundValue) DeepCopy() *CompoundValue {
+	if in == nil {
+		return nil
+	}
+	out := new(CompoundValue)
+	in.DeepCopyInto(out)
+	return out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *ContentRef) DeepCopyInto(out *ContentRef) {
 	*out = *in
@@ -951,6 +966,123 @@ func (in *KubeadmPhasesStatus) DeepCopy() *KubeadmPhasesStatus {
 	return out
 }
 
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *KubeconfigGenerator) DeepCopyInto(out *KubeconfigGenerator) {
+	*out = *in
+	out.TypeMeta = in.TypeMeta
+	in.ObjectMeta.DeepCopyInto(&out.ObjectMeta)
+	in.Spec.DeepCopyInto(&out.Spec)
+	in.Status.DeepCopyInto(&out.Status)
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new KubeconfigGenerator.
+func (in *KubeconfigGenerator) DeepCopy() *KubeconfigGenerator {
+	if in == nil {
+		return nil
+	}
+	out := new(KubeconfigGenerator)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new runtime.Object.
+func (in *KubeconfigGenerator) DeepCopyObject() runtime.Object {
+	if c := in.DeepCopy(); c != nil {
+		return c
+	}
+	return nil
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *KubeconfigGeneratorList) DeepCopyInto(out *KubeconfigGeneratorList) {
+	*out = *in
+	out.TypeMeta = in.TypeMeta
+	in.ListMeta.DeepCopyInto(&out.ListMeta)
+	if in.Items != nil {
+		in, out := &in.Items, &out.Items
+		*out = make([]KubeconfigGenerator, len(*in))
+		for i := range *in {
+			(*in)[i].DeepCopyInto(&(*out)[i])
+		}
+	}
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new KubeconfigGeneratorList.
+func (in *KubeconfigGeneratorList) DeepCopy() *KubeconfigGeneratorList {
+	if in == nil {
+		return nil
+	}
+	out := new(KubeconfigGeneratorList)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new runtime.Object.
+func (in *KubeconfigGeneratorList) DeepCopyObject() runtime.Object {
+	if c := in.DeepCopy(); c != nil {
+		return c
+	}
+	return nil
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *KubeconfigGeneratorSpec) DeepCopyInto(out *KubeconfigGeneratorSpec) {
+	*out = *in
+	in.NamespaceSelector.DeepCopyInto(&out.NamespaceSelector)
+	in.TenantControlPlaneSelector.DeepCopyInto(&out.TenantControlPlaneSelector)
+	if in.Groups != nil {
+		in, out := &in.Groups, &out.Groups
+		*out = make([]CompoundValue, len(*in))
+		copy(*out, *in)
+	}
+	out.User = in.User
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new KubeconfigGeneratorSpec.
+func (in *KubeconfigGeneratorSpec) DeepCopy() *KubeconfigGeneratorSpec {
+	if in == nil {
+		return nil
+	}
+	out := new(KubeconfigGeneratorSpec)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *KubeconfigGeneratorStatus) DeepCopyInto(out *KubeconfigGeneratorStatus) {
+	*out = *in
+	if in.Errors != nil {
+		in, out := &in.Errors, &out.Errors
+		*out = make([]KubeconfigGeneratorStatusError, len(*in))
+		copy(*out, *in)
+	}
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new KubeconfigGeneratorStatus.
+func (in *KubeconfigGeneratorStatus) DeepCopy() *KubeconfigGeneratorStatus {
+	if in == nil {
+		return nil
+	}
+	out := new(KubeconfigGeneratorStatus)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *KubeconfigGeneratorStatusError) DeepCopyInto(out *KubeconfigGeneratorStatusError) {
+	*out = *in
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new KubeconfigGeneratorStatusError.
+func (in *KubeconfigGeneratorStatusError) DeepCopy() *KubeconfigGeneratorStatusError {
+	if in == nil {
+		return nil
+	}
+	out := new(KubeconfigGeneratorStatusError)
+	in.DeepCopyInto(out)
+	return out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *KubeconfigStatus) DeepCopyInto(out *KubeconfigStatus) {
 	*out = *in
@@ -1153,6 +1285,21 @@ func (in *NetworkProfileSpec) DeepCopy() *NetworkProfileSpec {
 	return out
 }
 
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *Permissions) DeepCopyInto(out *Permissions) {
+	*out = *in
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new Permissions.
+func (in *Permissions) DeepCopy() *Permissions {
+	if in == nil {
+		return nil
+	}
+	out := new(Permissions)
+	in.DeepCopyInto(out)
+	return out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *PublicKeyPrivateKeyPairStatus) DeepCopyInto(out *PublicKeyPrivateKeyPairStatus) {
 	*out = *in
@@ -1317,6 +1464,7 @@ func (in *TenantControlPlaneList) DeepCopyObject() runtime.Object {
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *TenantControlPlaneSpec) DeepCopyInto(out *TenantControlPlaneSpec) {
 	*out = *in
+	out.WritePermissions = in.WritePermissions
 	in.ControlPlane.DeepCopyInto(&out.ControlPlane)
 	in.Kubernetes.DeepCopyInto(&out.Kubernetes)
 	in.NetworkProfile.DeepCopyInto(&out.NetworkProfile)

charts/kamaji-crds/Chart.yaml

@@ -14,7 +14,7 @@ name: kamaji-crds
 sources:
   - https://github.com/clastix/kamaji
 type: application
-version: 0.0.0+edge
+version: 0.0.0+latest
 annotations:
   artifacthub.io/crds: |
     - kind: TenantControlPlane

charts/kamaji-crds/README.md

@@ -1,6 +1,6 @@
 # kamaji-crds
 
-![Version: 0.0.0+edge](https://img.shields.io/badge/Version-0.0.0+edge-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: latest](https://img.shields.io/badge/AppVersion-latest-informational?style=flat-square)
+![Version: 0.0.0+latest](https://img.shields.io/badge/Version-0.0.0+latest-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: latest](https://img.shields.io/badge/AppVersion-latest-informational?style=flat-square)
 
 Kamaji is the Hosted Control Plane Manager for Kubernetes.
 

charts/kamaji-crds/hack/kamaji.clastix.io_kubeconfiggenerators_spec.yaml

@@ -0,0 +1,214 @@
+group: kamaji.clastix.io
+names:
+  categories:
+    - kamaji
+  kind: KubeconfigGenerator
+  listKind: KubeconfigGeneratorList
+  plural: kubeconfiggenerators
+  shortNames:
+    - kc
+  singular: kubeconfiggenerator
+scope: Cluster
+versions:
+  - additionalPrinterColumns:
+      - description: Age
+        jsonPath: .metadata.creationTimestamp
+        name: Age
+        type: date
+    name: v1alpha1
+    schema:
+      openAPIV3Schema:
+        description: KubeconfigGenerator is the Schema for the kubeconfiggenerators API.
+        properties:
+          apiVersion:
+            description: |-
+              APIVersion defines the versioned schema of this representation of an object.
+              Servers should convert recognized schemas to the latest internal value, and
+              may reject unrecognized values.
+              More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources
+            type: string
+          kind:
+            description: |-
+              Kind is a string value representing the REST resource this object represents.
+              Servers may infer this from the endpoint the client submits requests to.
+              Cannot be updated.
+              In CamelCase.
+              More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds
+            type: string
+          metadata:
+            type: object
+          spec:
+            properties:
+              controlPlaneEndpointFrom:
+                default: admin.svc
+                description: |-
+                  ControlPlaneEndpointFrom is the key used to extract the Tenant Control Plane endpoint that must be used by the generator.
+                  The targeted Secret is the `${TCP}-admin-kubeconfig` one, default to `admin.svc`.
+                type: string
+              groups:
+                description: |-
+                  Groups is resolved a set of strings used to assign the x509 organisations field.
+                  It will be recognised by Kubernetes as user groups.
+                items:
+                  description: |-
+                    CompoundValue allows defining a static, or a dynamic value.
+                    Options are mutually exclusive, just one should be picked up.
+                  properties:
+                    fromDefinition:
+                      description: |-
+                        FromDefinition is used to generate a dynamic value,
+                        it uses the dot notation to access fields from the referenced TenantControlPlane object:
+                        e.g.: metadata.name
+                      type: string
+                    stringValue:
+                      description: StringValue is a static string value.
+                      type: string
+                  type: object
+                  x-kubernetes-validations:
+                    - message: Either stringValue or fromDefinition must be set, but not both.
+                      rule: (has(self.stringValue) || has(self.fromDefinition)) && !(has(self.stringValue) && has(self.fromDefinition))
+                type: array
+              namespaceSelector:
+                description: NamespaceSelector is used to filter Namespaces from which the generator should extract TenantControlPlane objects.
+                properties:
+                  matchExpressions:
+                    description: matchExpressions is a list of label selector requirements. The requirements are ANDed.
+                    items:
+                      description: |-
+                        A label selector requirement is a selector that contains values, a key, and an operator that
+                        relates the key and values.
+                      properties:
+                        key:
+                          description: key is the label key that the selector applies to.
+                          type: string
+                        operator:
+                          description: |-
+                            operator represents a key's relationship to a set of values.
+                            Valid operators are In, NotIn, Exists and DoesNotExist.
+                          type: string
+                        values:
+                          description: |-
+                            values is an array of string values. If the operator is In or NotIn,
+                            the values array must be non-empty. If the operator is Exists or DoesNotExist,
+                            the values array must be empty. This array is replaced during a strategic
+                            merge patch.
+                          items:
+                            type: string
+                          type: array
+                          x-kubernetes-list-type: atomic
+                      required:
+                        - key
+                        - operator
+                      type: object
+                    type: array
+                    x-kubernetes-list-type: atomic
+                  matchLabels:
+                    additionalProperties:
+                      type: string
+                    description: |-
+                      matchLabels is a map of {key,value} pairs. A single {key,value} in the matchLabels
+                      map is equivalent to an element of matchExpressions, whose key field is "key", the
+                      operator is "In", and the values array contains only "value". The requirements are ANDed.
+                    type: object
+                type: object
+                x-kubernetes-map-type: atomic
+              tenantControlPlaneSelector:
+                description: TenantControlPlaneSelector is used to filter the TenantControlPlane objects that should be address by the generator.
+                properties:
+                  matchExpressions:
+                    description: matchExpressions is a list of label selector requirements. The requirements are ANDed.
+                    items:
+                      description: |-
+                        A label selector requirement is a selector that contains values, a key, and an operator that
+                        relates the key and values.
+                      properties:
+                        key:
+                          description: key is the label key that the selector applies to.
+                          type: string
+                        operator:
+                          description: |-
+                            operator represents a key's relationship to a set of values.
+                            Valid operators are In, NotIn, Exists and DoesNotExist.
+                          type: string
+                        values:
+                          description: |-
+                            values is an array of string values. If the operator is In or NotIn,
+                            the values array must be non-empty. If the operator is Exists or DoesNotExist,
+                            the values array must be empty. This array is replaced during a strategic
+                            merge patch.
+                          items:
+                            type: string
+                          type: array
+                          x-kubernetes-list-type: atomic
+                      required:
+                        - key
+                        - operator
+                      type: object
+                    type: array
+                    x-kubernetes-list-type: atomic
+                  matchLabels:
+                    additionalProperties:
+                      type: string
+                    description: |-
+                      matchLabels is a map of {key,value} pairs. A single {key,value} in the matchLabels
+                      map is equivalent to an element of matchExpressions, whose key field is "key", the
+                      operator is "In", and the values array contains only "value". The requirements are ANDed.
+                    type: object
+                type: object
+                x-kubernetes-map-type: atomic
+              user:
+                description: User resolves to a string to identify the client, assigned to the x509 Common Name field.
+                properties:
+                  fromDefinition:
+                    description: |-
+                      FromDefinition is used to generate a dynamic value,
+                      it uses the dot notation to access fields from the referenced TenantControlPlane object:
+                      e.g.: metadata.name
+                    type: string
+                  stringValue:
+                    description: StringValue is a static string value.
+                    type: string
+                type: object
+                x-kubernetes-validations:
+                  - message: Either stringValue or fromDefinition must be set, but not both.
+                    rule: (has(self.stringValue) || has(self.fromDefinition)) && !(has(self.stringValue) && has(self.fromDefinition))
+            required:
+              - user
+            type: object
+          status:
+            description: KubeconfigGeneratorStatus defines the observed state of KubeconfigGenerator.
+            properties:
+              availableResources:
+                default: 0
+                description: |-
+                  AvailableResources is the sum of successfully generated resources.
+                  In case of a different value compared to Resources, check the field errors.
+                type: integer
+              errors:
+                description: Errors is the list of failed kubeconfig generations.
+                items:
+                  properties:
+                    message:
+                      description: Message is the error message recorded upon the last generator run.
+                      type: string
+                    resource:
+                      description: Resource is the Namespaced name of the errored resource.
+                      type: string
+                  required:
+                    - message
+                    - resource
+                  type: object
+                type: array
+              resources:
+                default: 0
+                description: Resources is the sum of targeted TenantControlPlane objects.
+                type: integer
+            required:
+              - availableResources
+              - resources
+            type: object
+        type: object
+    served: true
+    storage: true
+    subresources:
+      status: {}

charts/kamaji-crds/hack/kamaji.clastix.io_tenantcontrolplanes_spec.yaml

@@ -6955,6 +6955,22 @@ versions:
                     description: 'CIDR for Kubernetes Services: if empty, defaulted to 10.96.0.0/16.'
                     type: string
                 type: object
+              writePermissions:
+                description: |-
+                  WritePermissions allows to select which operations (create, delete, update) must be blocked:
+                  by default, all actions are allowed, and API Server can write to its Datastore.
+
+                  By blocking all actions, the Tenant Control Plane can enter in a Read Only mode:
+                  this phase can be used to prevent Datastore quota exhaustion or for your own business logic
+                  (e.g.: blocking creation and update, but allowing deletion to "clean up" space).
+                properties:
+                  blockCreation:
+                    type: boolean
+                  blockDeletion:
+                    type: boolean
+                  blockUpdate:
+                    type: boolean
+                type: object
             required:
               - controlPlane
               - kubernetes
@@ -7703,6 +7719,7 @@ versions:
                         default: Provisioning
                         description: Status returns the current status of the Kubernetes version, such as its provisioning state, or completed upgrade.
                         enum:
+                          - Unknown
                           - Provisioning
                           - CertificateAuthorityRotating
                           - Upgrading
@@ -7710,6 +7727,7 @@ versions:
                           - Ready
                           - NotReady
                           - Sleeping
+                          - WriteLimited
                         type: string
                       version:
                         description: Version is the running Kubernetes version of the Tenant Control Plane.

charts/kamaji-crds/templates/kamaji.clastix.io_kubeconfiggenerators.yaml

@@ -0,0 +1,10 @@
+apiVersion: apiextensions.k8s.io/v1
+kind: CustomResourceDefinition
+metadata:
+  annotations:
+    cert-manager.io/inject-ca-from: {{ include "kamaji-crds.certManagerAnnotation" . }}
+  labels:
+    {{- include "kamaji-crds.labels" . | nindent 4 }}
+  name: kubeconfiggenerators.kamaji.clastix.io
+spec:
+  {{ tpl (.Files.Get "hack/kamaji.clastix.io_kubeconfiggenerators_spec.yaml") . | nindent 2 }}

charts/kamaji/README.md

@@ -83,6 +83,24 @@ Here the values you can override:
 | image.tag | string | `nil` | Overrides the image tag whose default is the chart appVersion. |
 | imagePullSecrets | list | `[]` |  |
 | kamaji-etcd | object | `{"clusterDomain":"cluster.local","datastore":{"enabled":true,"name":"default"},"deploy":true,"fullnameOverride":"kamaji-etcd"}` | Subchart: See https://github.com/clastix/kamaji-etcd/blob/master/charts/kamaji-etcd/values.yaml |
+| kubeconfigGenerator.affinity | object | `{}` | Kubernetes affinity rules to apply to Kubeconfig Generator controller pods |
+| kubeconfigGenerator.enableLeaderElect | bool | `true` | Enables the leader election. |
+| kubeconfigGenerator.enabled | bool | `false` | Toggle to deploy the Kubeconfig Generator Deployment. |
+| kubeconfigGenerator.extraArgs | list | `[]` | A list of extra arguments to add to the Kubeconfig Generator controller default ones. |
+| kubeconfigGenerator.fullnameOverride | string | `""` |  |
+| kubeconfigGenerator.healthProbeBindAddress | string | `":8081"` | The address the probe endpoint binds to. |
+| kubeconfigGenerator.loggingDevel.enable | bool | `false` | Development Mode defaults(encoder=consoleEncoder,logLevel=Debug,stackTraceLevel=Warn). Production Mode defaults(encoder=jsonEncoder,logLevel=Info,stackTraceLevel=Error) |
+| kubeconfigGenerator.nodeSelector | object | `{}` | Kubernetes node selector rules to schedule Kubeconfig Generator controller |
+| kubeconfigGenerator.podAnnotations | object | `{}` | The annotations to apply to the Kubeconfig Generator controller pods. |
+| kubeconfigGenerator.podSecurityContext | object | `{"runAsNonRoot":true}` | The securityContext to apply to the Kubeconfig Generator controller pods. |
+| kubeconfigGenerator.replicaCount | int | `2` | The number of the pod replicas for the Kubeconfig Generator controller. |
+| kubeconfigGenerator.resources.limits.cpu | string | `"200m"` |  |
+| kubeconfigGenerator.resources.limits.memory | string | `"512Mi"` |  |
+| kubeconfigGenerator.resources.requests.cpu | string | `"200m"` |  |
+| kubeconfigGenerator.resources.requests.memory | string | `"512Mi"` |  |
+| kubeconfigGenerator.securityContext | object | `{"allowPrivilegeEscalation":false}` | The securityContext to apply to the Kubeconfig Generator controller container only. |
+| kubeconfigGenerator.serviceAccountOverride | string | `""` | The name of the service account to use. If not set, the root Kamaji one will be used. |
+| kubeconfigGenerator.tolerations | list | `[]` | Kubernetes node taints that the Kubeconfig Generator controller pods would tolerate |
 | livenessProbe | object | `{"httpGet":{"path":"/healthz","port":"healthcheck"},"initialDelaySeconds":15,"periodSeconds":20}` | The livenessProbe for the controller container |
 | loggingDevel.enable | bool | `false` | Development Mode defaults(encoder=consoleEncoder,logLevel=Debug,stackTraceLevel=Warn). Production Mode defaults(encoder=jsonEncoder,logLevel=Info,stackTraceLevel=Error) (default false) |
 | metricsBindAddress | string | `":8080"` | The address the metric endpoint binds to. (default ":8080") |

charts/kamaji/controller-gen/clusterrole.yaml

@@ -1,3 +1,11 @@
+- apiGroups:
+    - ""
+  resources:
+    - namespaces
+  verbs:
+    - get
+    - list
+    - watch
 - apiGroups:
     - apps
   resources:
@@ -51,6 +59,7 @@
     - kamaji.clastix.io
   resources:
     - datastores/status
+    - kubeconfiggenerators/status
     - tenantcontrolplanes/status
   verbs:
     - get
@@ -59,6 +68,18 @@
 - apiGroups:
     - kamaji.clastix.io
   resources:
+    - kubeconfiggenerators
+  verbs:
+    - create
+    - get
+    - list
+    - patch
+    - update
+    - watch
+- apiGroups:
+    - kamaji.clastix.io
+  resources:
+    - kubeconfiggenerators/finalizers
     - tenantcontrolplanes/finalizers
   verbs:
     - update

charts/kamaji/crds/kamaji.clastix.io_kubeconfiggenerators.yaml

@@ -0,0 +1,222 @@
+apiVersion: apiextensions.k8s.io/v1
+kind: CustomResourceDefinition
+metadata:
+  annotations:
+    cert-manager.io/inject-ca-from: kamaji-system/kamaji-serving-cert
+    controller-gen.kubebuilder.io/version: v0.16.1
+  name: kubeconfiggenerators.kamaji.clastix.io
+spec:
+  group: kamaji.clastix.io
+  names:
+    categories:
+      - kamaji
+    kind: KubeconfigGenerator
+    listKind: KubeconfigGeneratorList
+    plural: kubeconfiggenerators
+    shortNames:
+      - kc
+    singular: kubeconfiggenerator
+  scope: Cluster
+  versions:
+    - additionalPrinterColumns:
+        - description: Age
+          jsonPath: .metadata.creationTimestamp
+          name: Age
+          type: date
+      name: v1alpha1
+      schema:
+        openAPIV3Schema:
+          description: KubeconfigGenerator is the Schema for the kubeconfiggenerators API.
+          properties:
+            apiVersion:
+              description: |-
+                APIVersion defines the versioned schema of this representation of an object.
+                Servers should convert recognized schemas to the latest internal value, and
+                may reject unrecognized values.
+                More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources
+              type: string
+            kind:
+              description: |-
+                Kind is a string value representing the REST resource this object represents.
+                Servers may infer this from the endpoint the client submits requests to.
+                Cannot be updated.
+                In CamelCase.
+                More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds
+              type: string
+            metadata:
+              type: object
+            spec:
+              properties:
+                controlPlaneEndpointFrom:
+                  default: admin.svc
+                  description: |-
+                    ControlPlaneEndpointFrom is the key used to extract the Tenant Control Plane endpoint that must be used by the generator.
+                    The targeted Secret is the `${TCP}-admin-kubeconfig` one, default to `admin.svc`.
+                  type: string
+                groups:
+                  description: |-
+                    Groups is resolved a set of strings used to assign the x509 organisations field.
+                    It will be recognised by Kubernetes as user groups.
+                  items:
+                    description: |-
+                      CompoundValue allows defining a static, or a dynamic value.
+                      Options are mutually exclusive, just one should be picked up.
+                    properties:
+                      fromDefinition:
+                        description: |-
+                          FromDefinition is used to generate a dynamic value,
+                          it uses the dot notation to access fields from the referenced TenantControlPlane object:
+                          e.g.: metadata.name
+                        type: string
+                      stringValue:
+                        description: StringValue is a static string value.
+                        type: string
+                    type: object
+                    x-kubernetes-validations:
+                      - message: Either stringValue or fromDefinition must be set, but not both.
+                        rule: (has(self.stringValue) || has(self.fromDefinition)) && !(has(self.stringValue) && has(self.fromDefinition))
+                  type: array
+                namespaceSelector:
+                  description: NamespaceSelector is used to filter Namespaces from which the generator should extract TenantControlPlane objects.
+                  properties:
+                    matchExpressions:
+                      description: matchExpressions is a list of label selector requirements. The requirements are ANDed.
+                      items:
+                        description: |-
+                          A label selector requirement is a selector that contains values, a key, and an operator that
+                          relates the key and values.
+                        properties:
+                          key:
+                            description: key is the label key that the selector applies to.
+                            type: string
+                          operator:
+                            description: |-
+                              operator represents a key's relationship to a set of values.
+                              Valid operators are In, NotIn, Exists and DoesNotExist.
+                            type: string
+                          values:
+                            description: |-
+                              values is an array of string values. If the operator is In or NotIn,
+                              the values array must be non-empty. If the operator is Exists or DoesNotExist,
+                              the values array must be empty. This array is replaced during a strategic
+                              merge patch.
+                            items:
+                              type: string
+                            type: array
+                            x-kubernetes-list-type: atomic
+                        required:
+                          - key
+                          - operator
+                        type: object
+                      type: array
+                      x-kubernetes-list-type: atomic
+                    matchLabels:
+                      additionalProperties:
+                        type: string
+                      description: |-
+                        matchLabels is a map of {key,value} pairs. A single {key,value} in the matchLabels
+                        map is equivalent to an element of matchExpressions, whose key field is "key", the
+                        operator is "In", and the values array contains only "value". The requirements are ANDed.
+                      type: object
+                  type: object
+                  x-kubernetes-map-type: atomic
+                tenantControlPlaneSelector:
+                  description: TenantControlPlaneSelector is used to filter the TenantControlPlane objects that should be address by the generator.
+                  properties:
+                    matchExpressions:
+                      description: matchExpressions is a list of label selector requirements. The requirements are ANDed.
+                      items:
+                        description: |-
+                          A label selector requirement is a selector that contains values, a key, and an operator that
+                          relates the key and values.
+                        properties:
+                          key:
+                            description: key is the label key that the selector applies to.
+                            type: string
+                          operator:
+                            description: |-
+                              operator represents a key's relationship to a set of values.
+                              Valid operators are In, NotIn, Exists and DoesNotExist.
+                            type: string
+                          values:
+                            description: |-
+                              values is an array of string values. If the operator is In or NotIn,
+                              the values array must be non-empty. If the operator is Exists or DoesNotExist,
+                              the values array must be empty. This array is replaced during a strategic
+                              merge patch.
+                            items:
+                              type: string
+                            type: array
+                            x-kubernetes-list-type: atomic
+                        required:
+                          - key
+                          - operator
+                        type: object
+                      type: array
+                      x-kubernetes-list-type: atomic
+                    matchLabels:
+                      additionalProperties:
+                        type: string
+                      description: |-
+                        matchLabels is a map of {key,value} pairs. A single {key,value} in the matchLabels
+                        map is equivalent to an element of matchExpressions, whose key field is "key", the
+                        operator is "In", and the values array contains only "value". The requirements are ANDed.
+                      type: object
+                  type: object
+                  x-kubernetes-map-type: atomic
+                user:
+                  description: User resolves to a string to identify the client, assigned to the x509 Common Name field.
+                  properties:
+                    fromDefinition:
+                      description: |-
+                        FromDefinition is used to generate a dynamic value,
+                        it uses the dot notation to access fields from the referenced TenantControlPlane object:
+                        e.g.: metadata.name
+                      type: string
+                    stringValue:
+                      description: StringValue is a static string value.
+                      type: string
+                  type: object
+                  x-kubernetes-validations:
+                    - message: Either stringValue or fromDefinition must be set, but not both.
+                      rule: (has(self.stringValue) || has(self.fromDefinition)) && !(has(self.stringValue) && has(self.fromDefinition))
+              required:
+                - user
+              type: object
+            status:
+              description: KubeconfigGeneratorStatus defines the observed state of KubeconfigGenerator.
+              properties:
+                availableResources:
+                  default: 0
+                  description: |-
+                    AvailableResources is the sum of successfully generated resources.
+                    In case of a different value compared to Resources, check the field errors.
+                  type: integer
+                errors:
+                  description: Errors is the list of failed kubeconfig generations.
+                  items:
+                    properties:
+                      message:
+                        description: Message is the error message recorded upon the last generator run.
+                        type: string
+                      resource:
+                        description: Resource is the Namespaced name of the errored resource.
+                        type: string
+                    required:
+                      - message
+                      - resource
+                    type: object
+                  type: array
+                resources:
+                  default: 0
+                  description: Resources is the sum of targeted TenantControlPlane objects.
+                  type: integer
+              required:
+                - availableResources
+                - resources
+              type: object
+          type: object
+      served: true
+      storage: true
+      subresources:
+        status: {}

charts/kamaji/crds/kamaji.clastix.io_tenantcontrolplanes.yaml

@@ -6963,6 +6963,22 @@ spec:
                       description: 'CIDR for Kubernetes Services: if empty, defaulted to 10.96.0.0/16.'
                       type: string
                   type: object
+                writePermissions:
+                  description: |-
+                    WritePermissions allows to select which operations (create, delete, update) must be blocked:
+                    by default, all actions are allowed, and API Server can write to its Datastore.
+
+                    By blocking all actions, the Tenant Control Plane can enter in a Read Only mode:
+                    this phase can be used to prevent Datastore quota exhaustion or for your own business logic
+                    (e.g.: blocking creation and update, but allowing deletion to "clean up" space).
+                  properties:
+                    blockCreation:
+                      type: boolean
+                    blockDeletion:
+                      type: boolean
+                    blockUpdate:
+                      type: boolean
+                  type: object
               required:
                 - controlPlane
                 - kubernetes
@@ -7711,6 +7727,7 @@ spec:
                           default: Provisioning
                           description: Status returns the current status of the Kubernetes version, such as its provisioning state, or completed upgrade.
                           enum:
+                            - Unknown
                             - Provisioning
                             - CertificateAuthorityRotating
                             - Upgrading
@@ -7718,6 +7735,7 @@ spec:
                             - Ready
                             - NotReady
                             - Sleeping
+                            - WriteLimited
                           type: string
                         version:
                           description: Version is the running Kubernetes version of the Tenant Control Plane.

charts/kamaji/templates/_helpers.tpl

@@ -89,3 +89,15 @@ Create the name of the cert-manager Certificate
 {{- define "kamaji.certificateName" -}}
 {{- printf "%s-serving-cert" (include "kamaji.fullname" .) }}
 {{- end }}
+
+
+{{/*
+Kubeconfig Generator Deployment name.
+*/}}
+{{- define "kamaji.kubeconfigGeneratorName" -}}
+{{- if .Values.kubeconfigGenerator.fullnameOverride }}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- printf "%s-%s" .Release.Name "kubeconfig-generator" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+{{- end }}

charts/kamaji/templates/kubeconfiggenerator-deployment.yaml

@@ -0,0 +1,54 @@
+{{- if .Values.kubeconfigGenerator.enabled }}
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  labels:
+    {{- include "kamaji.labels" . | nindent 4 }}
+  name: {{ include "kamaji.kubeconfigGeneratorName" . }}
+  namespace: {{ .Release.Namespace }}
+spec:
+  replicas: {{ .Values.kubeconfigGenerator.replicaCount }}
+  selector:
+    matchLabels:
+      {{- include "kamaji.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      {{- with .Values.kubeconfigGenerator.podAnnotations }}
+      annotations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      labels:
+        {{- include "kamaji.selectorLabels" . | nindent 8 }}
+    spec:
+      securityContext:
+        {{- toYaml .Values.kubeconfigGenerator.podSecurityContext | nindent 8 }}
+      serviceAccountName: {{ default .Values.kubeconfigGenerator.serviceAccountOverride (include "kamaji.serviceAccountName" .) }}
+      containers:
+        - args:
+          - kubeconfig-generator
+          - --health-probe-bind-address={{ .Values.kubeconfigGenerator.healthProbeBindAddress }}
+          - --leader-elect={{ .Values.kubeconfigGenerator.enableLeaderElect }}
+          {{- if .Values.kubeconfigGenerator.loggingDevel.enable }}- --zap-devel{{- end }}
+          {{- with .Values.kubeconfigGenerator.extraArgs }}
+          {{- toYaml . | nindent 10 }}
+          {{- end }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          name: controller
+          resources:
+            {{- toYaml .Values.kubeconfigGenerator.resources | nindent 12 }}
+          securityContext:
+            {{- toYaml .Values.kubeconfigGenerator.securityContext | nindent 12 }}
+      {{- with .Values.kubeconfigGenerator.nodeSelector }}
+      nodeSelector:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.kubeconfigGenerator.affinity }}
+      affinity:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.kubeconfigGenerator.tolerations }}
+      tolerations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+{{- end }}

charts/kamaji/values.yaml

@@ -111,4 +111,48 @@ kamaji-etcd:
 # -- Disable the analytics traces collection
 telemetry:
   disabled: false
-  
+
+kubeconfigGenerator:
+  # -- Toggle to deploy the Kubeconfig Generator Deployment.
+  enabled: false
+  fullnameOverride: ""
+  # -- The number of the pod replicas for the Kubeconfig Generator controller.
+  replicaCount: 2
+  # -- The annotations to apply to the Kubeconfig Generator controller pods.
+  podAnnotations: {}
+  # -- The securityContext to apply to the Kubeconfig Generator controller pods.
+  podSecurityContext:
+    runAsNonRoot: true
+  # -- The name of the service account to use. If not set, the root Kamaji one will be used.
+  serviceAccountOverride: ""
+  # -- The address the probe endpoint binds to.
+  healthProbeBindAddress: ":8081"
+  # -- Enables the leader election.
+  enableLeaderElect: true
+  loggingDevel:
+    # -- Development Mode defaults(encoder=consoleEncoder,logLevel=Debug,stackTraceLevel=Warn). Production Mode defaults(encoder=jsonEncoder,logLevel=Info,stackTraceLevel=Error)
+    enable: false
+  # -- A list of extra arguments to add to the Kubeconfig Generator controller default ones.
+  extraArgs: []
+  resources:
+    limits:
+      cpu: 200m
+      memory: 512Mi
+    requests:
+      cpu: 200m
+      memory: 512Mi
+  # -- The securityContext to apply to the Kubeconfig Generator controller container only.
+  securityContext:
+    allowPrivilegeEscalation: false
+    # capabilities:
+    #   drop:
+    #   - ALL
+    # readOnlyRootFilesystem: true
+    # runAsNonRoot: true
+    # runAsUser: 1000
+  # -- Kubernetes node selector rules to schedule Kubeconfig Generator controller
+  nodeSelector: {}
+  # -- Kubernetes node taints that the Kubeconfig Generator controller pods would tolerate
+  tolerations: []
+  # -- Kubernetes affinity rules to apply to Kubeconfig Generator controller pods
+  affinity: {}

cmd/kubeconfig-generator/cmd.go

@@ -0,0 +1,167 @@
+// Copyright 2022 Clastix Labs
+// SPDX-License-Identifier: Apache-2.0
+
+package kubeconfiggenerator
+
+import (
+	"flag"
+	"fmt"
+	"io"
+	"os"
+	goRuntime "runtime"
+	"time"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/rest"
+	"k8s.io/klog/v2"
+	ctrl "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/cache"
+	"sigs.k8s.io/controller-runtime/pkg/event"
+	"sigs.k8s.io/controller-runtime/pkg/healthz"
+	"sigs.k8s.io/controller-runtime/pkg/log/zap"
+	metricsserver "sigs.k8s.io/controller-runtime/pkg/metrics/server"
+
+	"github.com/clastix/kamaji/controllers"
+	"github.com/clastix/kamaji/internal"
+)
+
+func NewCmd(scheme *runtime.Scheme) *cobra.Command {
+	// CLI flags
+	var (
+		metricsBindAddress            string
+		healthProbeBindAddress        string
+		leaderElect                   bool
+		controllerReconcileTimeout    time.Duration
+		cacheResyncPeriod             time.Duration
+		managerNamespace              string
+		certificateExpirationDeadline time.Duration
+	)
+
+	cmd := &cobra.Command{
+		Use:           "kubeconfig-generator",
+		Short:         "Start the Kubeconfig Generator manager",
+		SilenceErrors: false,
+		SilenceUsage:  true,
+		PreRunE: func(*cobra.Command, []string) error {
+			// Avoid polluting stdout with useless details by the underlying klog implementations
+			klog.SetOutput(io.Discard)
+			klog.LogToStderr(false)
+
+			if certificateExpirationDeadline < 24*time.Hour {
+				return fmt.Errorf("certificate expiration deadline must be at least 24 hours")
+			}
+
+			return nil
+		},
+		RunE: func(*cobra.Command, []string) error {
+			ctx := ctrl.SetupSignalHandler()
+
+			setupLog := ctrl.Log.WithName("kubeconfig-generator")
+
+			setupLog.Info(fmt.Sprintf("Kamaji version %s %s%s", internal.GitTag, internal.GitCommit, internal.GitDirty))
+			setupLog.Info(fmt.Sprintf("Build from: %s", internal.GitRepo))
+			setupLog.Info(fmt.Sprintf("Build date: %s", internal.BuildTime))
+			setupLog.Info(fmt.Sprintf("Go Version: %s", goRuntime.Version()))
+			setupLog.Info(fmt.Sprintf("Go OS/Arch: %s/%s", goRuntime.GOOS, goRuntime.GOARCH))
+
+			ctrlOpts := ctrl.Options{
+				Scheme: scheme,
+				Metrics: metricsserver.Options{
+					BindAddress: metricsBindAddress,
+				},
+				HealthProbeBindAddress:  healthProbeBindAddress,
+				LeaderElection:          leaderElect,
+				LeaderElectionNamespace: managerNamespace,
+				LeaderElectionID:        "kubeconfiggenerator.kamaji.clastix.io",
+				NewCache: func(config *rest.Config, opts cache.Options) (cache.Cache, error) {
+					opts.SyncPeriod = &cacheResyncPeriod
+
+					return cache.New(config, opts)
+				},
+			}
+
+			triggerChan := make(chan event.GenericEvent)
+
+			mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrlOpts)
+			if err != nil {
+				setupLog.Error(err, "unable to start manager")
+
+				return err
+			}
+
+			setupLog.Info("setting probes")
+			{
+				if err = mgr.AddHealthzCheck("healthz", healthz.Ping); err != nil {
+					setupLog.Error(err, "unable to set up health check")
+
+					return err
+				}
+				if err = mgr.AddReadyzCheck("readyz", healthz.Ping); err != nil {
+					setupLog.Error(err, "unable to set up ready check")
+
+					return err
+				}
+			}
+
+			certController := &controllers.CertificateLifecycle{Channel: triggerChan, Deadline: certificateExpirationDeadline}
+			certController.EnqueueFn = certController.EnqueueForKubeconfigGenerator
+			if err = certController.SetupWithManager(mgr); err != nil {
+				setupLog.Error(err, "unable to create controller", "controller", "CertificateLifecycle")
+
+				return err
+			}
+
+			if err = (&controllers.KubeconfigGeneratorWatcher{
+				Client:        mgr.GetClient(),
+				GeneratorChan: triggerChan,
+			}).SetupWithManager(mgr); err != nil {
+				setupLog.Error(err, "unable to create controller", "controller", "KubeconfigGeneratorWatcher")
+
+				return err
+			}
+
+			if err = (&controllers.KubeconfigGeneratorReconciler{
+				Client:            mgr.GetClient(),
+				NotValidThreshold: certificateExpirationDeadline,
+				CertificateChan:   triggerChan,
+			}).SetupWithManager(mgr); err != nil {
+				setupLog.Error(err, "unable to create controller", "controller", "KubeconfigGenerator")
+
+				return err
+			}
+
+			setupLog.Info("starting manager")
+			if err = mgr.Start(ctx); err != nil {
+				setupLog.Error(err, "problem running manager")
+
+				return err
+			}
+
+			return nil
+		},
+	}
+	// Setting zap logger
+	zapfs := flag.NewFlagSet("zap", flag.ExitOnError)
+	opts := zap.Options{
+		Development: true,
+	}
+	opts.BindFlags(zapfs)
+	cmd.Flags().AddGoFlagSet(zapfs)
+	ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))
+	// Setting CLI flags
+	cmd.Flags().StringVar(&metricsBindAddress, "metrics-bind-address", ":8090", "The address the metric endpoint binds to.")
+	cmd.Flags().StringVar(&healthProbeBindAddress, "health-probe-bind-address", ":8091", "The address the probe endpoint binds to.")
+	cmd.Flags().BoolVar(&leaderElect, "leader-elect", true, "Enable leader election for controller manager. Enabling this will ensure there is only one active controller manager.")
+	cmd.Flags().DurationVar(&controllerReconcileTimeout, "controller-reconcile-timeout", 30*time.Second, "The reconciliation request timeout before the controller withdraw the external resource calls, such as dealing with the Datastore, or the Tenant Control Plane API endpoint.")
+	cmd.Flags().DurationVar(&cacheResyncPeriod, "cache-resync-period", 10*time.Hour, "The controller-runtime.Manager cache resync period.")
+	cmd.Flags().StringVar(&managerNamespace, "pod-namespace", os.Getenv("POD_NAMESPACE"), "The Kubernetes Namespace on which the Operator is running in, required for the TenantControlPlane migration jobs.")
+	cmd.Flags().DurationVar(&certificateExpirationDeadline, "certificate-expiration-deadline", 24*time.Hour, "Define the deadline upon certificate expiration to start the renewal process, cannot be less than a 24 hours.")
+
+	cobra.OnInitialize(func() {
+		viper.AutomaticEnv()
+	})
+
+	return cmd
+}

cmd/manager/cmd.go

@@ -4,6 +4,7 @@
 package manager
 
 import (
+	"context"
 	"flag"
 	"fmt"
 	"io"
@@ -62,8 +63,6 @@ func NewCmd(scheme *runtime.Scheme) *cobra.Command {
 		webhookCAPath string
 	)
 
-	ctx := ctrl.SetupSignalHandler()
-
 	cmd := &cobra.Command{
 		Use:           "manager",
 		Short:         "Start the Kamaji Kubernetes Operator",
@@ -86,7 +85,7 @@ func NewCmd(scheme *runtime.Scheme) *cobra.Command {
 				return fmt.Errorf("unable to read webhook CA: %w", err)
 			}
 
-			if err = datastoreutils.CheckExists(ctx, scheme, datastore); err != nil {
+			if err = datastoreutils.CheckExists(context.Background(), scheme, datastore); err != nil {
 				return err
 			}
 
@@ -97,6 +96,8 @@ func NewCmd(scheme *runtime.Scheme) *cobra.Command {
 			return nil
 		},
 		RunE: func(*cobra.Command, []string) error {
+			ctx := ctrl.SetupSignalHandler()
+
 			setupLog := ctrl.Log.WithName("setup")
 
 			setupLog.Info(fmt.Sprintf("Kamaji version %s %s%s", internal.GitTag, internal.GitCommit, internal.GitDirty))
@@ -193,7 +194,10 @@ func NewCmd(scheme *runtime.Scheme) *cobra.Command {
 				}
 			}
 
-			if err = (&controllers.CertificateLifecycle{Channel: certChannel, Deadline: certificateExpirationDeadline}).SetupWithManager(mgr); err != nil {
+			certController := &controllers.CertificateLifecycle{Channel: certChannel, Deadline: certificateExpirationDeadline}
+			certController.EnqueueFn = certController.EnqueueForTenantControlPlane
+
+			if err = certController.SetupWithManager(mgr); err != nil {
 				setupLog.Error(err, "unable to create controller", "controller", "CertificateLifecycle")
 
 				return err
@@ -215,6 +219,9 @@ func NewCmd(scheme *runtime.Scheme) *cobra.Command {
 				routes.TenantControlPlaneMigrate{}: {
 					handlers.Freeze{},
 				},
+				routes.TenantControlPlaneWritePermission{}: {
+					handlers.WritePermission{},
+				},
 				routes.TenantControlPlaneDefaults{}: {
 					handlers.TenantControlPlaneDefaults{
 						DefaultDatastore: datastore,

config/samples/kamaji_v1alpha1_kubeconfiggenerator.yaml

@@ -0,0 +1,21 @@
+apiVersion: kamaji.clastix.io/v1alpha1
+kind: KubeconfigGenerator
+metadata:
+  name: tenant
+spec:
+  controlPlaneEndpointFrom: admin.conf
+  groups:
+    - stringValue: custom.group.tld
+    - fromDefinition: metadata.namespace
+  namespaceSelector:
+    matchExpressions:
+      - key: kubernetes.io/metadata.name
+        operator: Exists
+        values: []
+  tenantControlPlaneSelector:
+    matchExpressions:
+      - key: tenant.clastix.io
+        operator: Exists
+        values: []
+  user:
+    fromDefinition: metadata.name

controllers/certificate_lifecycle_controller.go

@@ -31,8 +31,9 @@ import (
 )
 
 type CertificateLifecycle struct {
-	Channel  chan event.GenericEvent
-	Deadline time.Duration
+	Channel   chan event.GenericEvent
+	Deadline  time.Duration
+	EnqueueFn func(secret *corev1.Secret)
 
 	client client.Client
 }
@@ -91,12 +92,7 @@ func (s *CertificateLifecycle) Reconcile(ctx context.Context, request reconcile.
 	if deadline.After(crt.NotAfter) {
 		logger.Info("certificate near expiration, must be rotated")
 
-		s.Channel <- event.GenericEvent{Object: &kamajiv1alpha1.TenantControlPlane{
-			ObjectMeta: metav1.ObjectMeta{
-				Name:      secret.GetOwnerReferences()[0].Name,
-				Namespace: secret.Namespace,
-			},
-		}}
+		s.EnqueueFn(&secret)
 
 		logger.Info("certificate rotation triggered")
 
@@ -110,6 +106,35 @@ func (s *CertificateLifecycle) Reconcile(ctx context.Context, request reconcile.
 	return reconcile.Result{RequeueAfter: after}, nil
 }
 
+func (s *CertificateLifecycle) EnqueueForTenantControlPlane(secret *corev1.Secret) {
+	for _, or := range secret.GetOwnerReferences() {
+		if or.Kind != "TenantControlPlane" {
+			continue
+		}
+
+		s.Channel <- event.GenericEvent{Object: &kamajiv1alpha1.TenantControlPlane{
+			ObjectMeta: metav1.ObjectMeta{
+				Name:      or.Name,
+				Namespace: secret.Namespace,
+			},
+		}}
+	}
+}
+
+func (s *CertificateLifecycle) EnqueueForKubeconfigGenerator(secret *corev1.Secret) {
+	for _, or := range secret.GetOwnerReferences() {
+		if or.Kind != "KubeconfigGenerator" {
+			continue
+		}
+
+		s.Channel <- event.GenericEvent{Object: &kamajiv1alpha1.TenantControlPlane{
+			ObjectMeta: metav1.ObjectMeta{
+				Name: or.Name,
+			},
+		}}
+	}
+}
+
 func (s *CertificateLifecycle) extractCertificateFromBareSecret(secret corev1.Secret) (*x509.Certificate, error) {
 	var crt *x509.Certificate
 	var err error

controllers/kubeconfiggenerator_controller.go

@@ -0,0 +1,444 @@
+// Copyright 2022 Clastix Labs
+// SPDX-License-Identifier: Apache-2.0
+
+package controllers
+
+import (
+	"bytes"
+	"context"
+	"crypto/x509"
+	"fmt"
+	"sort"
+	"strings"
+	"time"
+
+	"github.com/pkg/errors"
+	corev1 "k8s.io/api/core/v1"
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/apimachinery/pkg/util/sets"
+	clientcmdapiv1 "k8s.io/client-go/tools/clientcmd/api/v1"
+	certutil "k8s.io/client-go/util/cert"
+	"k8s.io/client-go/util/keyutil"
+	"k8s.io/client-go/util/workqueue"
+	kubeadmconstants "k8s.io/kubernetes/cmd/kubeadm/app/constants"
+	"k8s.io/kubernetes/cmd/kubeadm/app/util"
+	"k8s.io/kubernetes/cmd/kubeadm/app/util/pkiutil"
+	ctrl "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+	"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
+	"sigs.k8s.io/controller-runtime/pkg/event"
+	"sigs.k8s.io/controller-runtime/pkg/handler"
+	"sigs.k8s.io/controller-runtime/pkg/log"
+	"sigs.k8s.io/controller-runtime/pkg/manager"
+	"sigs.k8s.io/controller-runtime/pkg/reconcile"
+	"sigs.k8s.io/controller-runtime/pkg/source"
+
+	kamajiv1alpha1 "github.com/clastix/kamaji/api/v1alpha1"
+	"github.com/clastix/kamaji/controllers/utils"
+	"github.com/clastix/kamaji/internal/constants"
+	"github.com/clastix/kamaji/internal/crypto"
+	"github.com/clastix/kamaji/internal/resources"
+	"github.com/clastix/kamaji/internal/utilities"
+)
+
+type KubeconfigGeneratorReconciler struct {
+	Client            client.Client
+	NotValidThreshold time.Duration
+	CertificateChan   chan event.GenericEvent
+}
+
+//+kubebuilder:rbac:groups="",resources=namespaces,verbs=get;list;watch
+//+kubebuilder:rbac:groups=kamaji.clastix.io,resources=kubeconfiggenerators,verbs=get;list;watch;create;update;patch
+//+kubebuilder:rbac:groups=kamaji.clastix.io,resources=kubeconfiggenerators/status,verbs=get;update;patch
+//+kubebuilder:rbac:groups=kamaji.clastix.io,resources=kubeconfiggenerators/finalizers,verbs=update
+
+func (r *KubeconfigGeneratorReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
+	logger := log.FromContext(ctx)
+
+	logger.Info("reconciling resource")
+
+	var generator kamajiv1alpha1.KubeconfigGenerator
+	if err := r.Client.Get(ctx, req.NamespacedName, &generator); err != nil {
+		if apierrors.IsNotFound(err) {
+			logger.Info("resource may have been deleted, skipping")
+
+			return ctrl.Result{}, nil
+		}
+
+		logger.Error(err, "cannot retrieve the required resource")
+
+		return ctrl.Result{}, err
+	}
+
+	if utils.IsPaused(&generator) {
+		logger.Info("paused reconciliation, no further actions")
+
+		return ctrl.Result{}, nil
+	}
+
+	status, err := r.handle(ctx, &generator)
+	if err != nil {
+		logger.Error(err, "cannot handle the request")
+
+		return ctrl.Result{}, err
+	}
+
+	generator.Status = status
+
+	if statusErr := r.Client.Status().Update(ctx, &generator); statusErr != nil {
+		logger.Error(statusErr, "cannot update resource status")
+
+		return ctrl.Result{}, statusErr
+	}
+
+	logger.Info("reconciling completed")
+
+	return ctrl.Result{}, nil
+}
+
+func (r *KubeconfigGeneratorReconciler) handle(ctx context.Context, generator *kamajiv1alpha1.KubeconfigGenerator) (kamajiv1alpha1.KubeconfigGeneratorStatus, error) {
+	nsSelector, nsErr := metav1.LabelSelectorAsSelector(&generator.Spec.NamespaceSelector)
+	if nsErr != nil {
+		return kamajiv1alpha1.KubeconfigGeneratorStatus{}, errors.Wrap(nsErr, "NamespaceSelector contains an error")
+	}
+
+	var namespaceList corev1.NamespaceList
+	if err := r.Client.List(ctx, &namespaceList, &client.ListOptions{LabelSelector: nsSelector}); err != nil {
+		return kamajiv1alpha1.KubeconfigGeneratorStatus{}, errors.Wrap(err, "cannot filter Namespace objects using provided selector")
+	}
+
+	var targets []kamajiv1alpha1.TenantControlPlane
+
+	for _, ns := range namespaceList.Items {
+		tcpSelector, tcpErr := metav1.LabelSelectorAsSelector(&generator.Spec.TenantControlPlaneSelector)
+		if tcpErr != nil {
+			return kamajiv1alpha1.KubeconfigGeneratorStatus{}, errors.Wrap(tcpErr, "TenantControlPlaneSelector contains an error")
+		}
+
+		var tcpList kamajiv1alpha1.TenantControlPlaneList
+		if err := r.Client.List(ctx, &tcpList, &client.ListOptions{Namespace: ns.GetName(), LabelSelector: tcpSelector}); err != nil {
+			return kamajiv1alpha1.KubeconfigGeneratorStatus{}, errors.Wrap(err, "cannot filter TenantControlPlane objects using provided selector")
+		}
+
+		targets = append(targets, tcpList.Items...)
+	}
+
+	sort.Slice(targets, func(i, j int) bool {
+		return client.ObjectKeyFromObject(&targets[i]).String() < client.ObjectKeyFromObject(&targets[j]).String()
+	})
+
+	status := kamajiv1alpha1.KubeconfigGeneratorStatus{
+		Resources:          len(targets),
+		AvailableResources: len(targets),
+	}
+
+	for _, tcp := range targets {
+		if err := r.process(ctx, generator, tcp); err != nil {
+			status.Errors = append(status.Errors, *err)
+			status.AvailableResources--
+		}
+	}
+
+	return status, nil
+}
+
+func (r *KubeconfigGeneratorReconciler) process(ctx context.Context, generator *kamajiv1alpha1.KubeconfigGenerator, tcp kamajiv1alpha1.TenantControlPlane) *kamajiv1alpha1.KubeconfigGeneratorStatusError {
+	statusErr := kamajiv1alpha1.KubeconfigGeneratorStatusError{
+		Resource: client.ObjectKeyFromObject(&tcp).String(),
+	}
+
+	var adminSecret corev1.Secret
+
+	if tcp.Status.KubeConfig.Admin.SecretName == "" {
+		statusErr.Message = "the admin kubeconfig is not yet generated"
+
+		return &statusErr
+	}
+
+	if err := r.Client.Get(ctx, types.NamespacedName{Name: tcp.Status.KubeConfig.Admin.SecretName, Namespace: tcp.GetNamespace()}, &adminSecret); err != nil {
+		statusErr.Message = fmt.Sprintf("an error occurred retrieving the admin Kubeconfig: %s", err.Error())
+
+		return &statusErr
+	}
+
+	kubeconfigTmpl, kcErr := utilities.DecodeKubeconfig(adminSecret, generator.Spec.ControlPlaneEndpointFrom)
+	if kcErr != nil {
+		statusErr.Message = fmt.Sprintf("unable to decode Kubeconfig template: %s", kcErr.Error())
+
+		return &statusErr
+	}
+
+	uMap, uErr := runtime.DefaultUnstructuredConverter.ToUnstructured(&tcp)
+	if uErr != nil {
+		statusErr.Message = fmt.Sprintf("cannot convert the resource to a map: %s", uErr)
+
+		return &statusErr
+	}
+
+	var user string
+	groups := sets.New[string]()
+
+	for _, group := range generator.Spec.Groups {
+		switch {
+		case group.StringValue != "":
+			groups.Insert(group.StringValue)
+		case group.FromDefinition != "":
+			v, ok, vErr := unstructured.NestedString(uMap, strings.Split(group.FromDefinition, ".")...)
+			switch {
+			case vErr != nil:
+				statusErr.Message = fmt.Sprintf("cannot run NestedString %q due to an error: %s", group.FromDefinition, vErr.Error())
+
+				return &statusErr
+			case !ok:
+				statusErr.Message = fmt.Sprintf("provided dot notation %q is not found", group.FromDefinition)
+
+				return &statusErr
+			default:
+				groups.Insert(v)
+			}
+		default:
+			statusErr.Message = "at least a StringValue or FromDefinition Group value must be provided"
+
+			return &statusErr
+		}
+	}
+
+	switch {
+	case generator.Spec.User.StringValue != "":
+		user = generator.Spec.User.StringValue
+	case generator.Spec.User.FromDefinition != "":
+		v, ok, vErr := unstructured.NestedString(uMap, strings.Split(generator.Spec.User.FromDefinition, ".")...)
+
+		switch {
+		case vErr != nil:
+			statusErr.Message = fmt.Sprintf("cannot run NestedString %q due to an error: %s", generator.Spec.User.FromDefinition, vErr.Error())
+
+			return &statusErr
+		case !ok:
+			statusErr.Message = fmt.Sprintf("provided dot notation %q is not found", generator.Spec.User.FromDefinition)
+
+			return &statusErr
+		default:
+			user = v
+		}
+	default:
+		statusErr.Message = "at least a StringValue or FromDefinition for the user field must be provided"
+
+		return &statusErr
+	}
+
+	var resultSecret corev1.Secret
+	resultSecret.SetName(tcp.Name + "-" + generator.Name)
+	resultSecret.SetNamespace(tcp.Namespace)
+
+	objectKey := client.ObjectKeyFromObject(&resultSecret)
+
+	if err := r.Client.Get(ctx, objectKey, &resultSecret); err != nil {
+		if !apierrors.IsNotFound(err) {
+			statusErr.Message = fmt.Sprintf("the secret %q cannot be generated", objectKey.String())
+
+			return &statusErr
+		}
+
+		if generateErr := r.generate(ctx, generator, &resultSecret, kubeconfigTmpl, &tcp, groups, user); generateErr != nil {
+			statusErr.Message = fmt.Sprintf("an error occurred generating the %q Secret: %s", objectKey.String(), generateErr.Error())
+
+			return &statusErr
+		}
+
+		return nil
+	}
+
+	isValid, validateErr := r.isValid(&resultSecret, kubeconfigTmpl, groups, user)
+	switch {
+	case !isValid:
+		if generateErr := r.generate(ctx, generator, &resultSecret, kubeconfigTmpl, &tcp, groups, user); generateErr != nil {
+			statusErr.Message = fmt.Sprintf("an error occurred regenerating the %q Secret: %s", objectKey.String(), generateErr.Error())
+
+			return &statusErr
+		}
+
+		return nil
+	case validateErr != nil:
+		statusErr.Message = fmt.Sprintf("an error occurred checking validation for %q Secret: %s", objectKey.String(), validateErr.Error())
+
+		return &statusErr
+	default:
+		return nil
+	}
+}
+
+func (r *KubeconfigGeneratorReconciler) generate(ctx context.Context, generator *kamajiv1alpha1.KubeconfigGenerator, secret *corev1.Secret, tmpl *clientcmdapiv1.Config, tcp *kamajiv1alpha1.TenantControlPlane, groups sets.Set[string], user string) error {
+	_, config, err := resources.GetKubeadmManifestDeps(ctx, r.Client, tcp)
+	if err != nil {
+		return err
+	}
+
+	clientCertConfig := pkiutil.CertConfig{
+		Config: certutil.Config{
+			CommonName:   user,
+			Organization: groups.UnsortedList(),
+			Usages:       []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth},
+		},
+		NotAfter:            util.StartTimeUTC().Add(kubeadmconstants.CertificateValidityPeriod),
+		EncryptionAlgorithm: config.InitConfiguration.ClusterConfiguration.EncryptionAlgorithmType(),
+	}
+
+	var caSecret corev1.Secret
+	if caErr := r.Client.Get(ctx, types.NamespacedName{Namespace: tcp.Namespace, Name: tcp.Status.Certificates.CA.SecretName}, &caSecret); caErr != nil {
+		return errors.Wrap(caErr, "cannot retrieve Certificate Authority")
+	}
+
+	caCert, crtErr := crypto.ParseCertificateBytes(caSecret.Data[kubeadmconstants.CACertName])
+	if crtErr != nil {
+		return errors.Wrap(crtErr, "cannot parse Certificate Authority certificate")
+	}
+
+	caKey, keyErr := crypto.ParsePrivateKeyBytes(caSecret.Data[kubeadmconstants.CAKeyName])
+	if keyErr != nil {
+		return errors.Wrap(keyErr, "cannot parse Certificate Authority key")
+	}
+
+	clientCert, clientKey, err := pkiutil.NewCertAndKey(caCert, caKey, &clientCertConfig)
+
+	contextUserName := generator.Name
+
+	for name := range tmpl.AuthInfos {
+		tmpl.AuthInfos[name].Name = contextUserName
+		tmpl.AuthInfos[name].AuthInfo.ClientCertificateData = pkiutil.EncodeCertPEM(clientCert)
+		tmpl.AuthInfos[name].AuthInfo.ClientKeyData, err = keyutil.MarshalPrivateKeyToPEM(clientKey)
+		if err != nil {
+			return errors.Wrap(err, "cannot marshal private key to PEM")
+		}
+	}
+
+	for name := range tmpl.Contexts {
+		tmpl.Contexts[name].Name = contextUserName
+		tmpl.Contexts[name].Context.AuthInfo = contextUserName
+	}
+
+	tmpl.CurrentContext = contextUserName
+
+	_, err = utilities.CreateOrUpdateWithConflict(ctx, r.Client, secret, func() error {
+		labels := secret.GetLabels()
+		if labels == nil {
+			labels = map[string]string{}
+		}
+
+		labels[kamajiv1alpha1.ManagedByLabel] = generator.Name
+		labels[kamajiv1alpha1.ManagedForLabel] = tcp.Name
+		labels[constants.ControllerLabelResource] = utilities.CertificateKubeconfigLabel
+
+		secret.SetLabels(labels)
+
+		if secret.Data == nil {
+			secret.Data = make(map[string][]byte)
+		}
+
+		secret.Data["value"], err = utilities.EncodeToYaml(tmpl)
+		if err != nil {
+			return errors.Wrap(err, "cannot encode generated Kubeconfig to YAML")
+		}
+
+		if utilities.IsRotationRequested(secret) {
+			utilities.SetLastRotationTimestamp(secret)
+		}
+
+		if orErr := controllerutil.SetOwnerReference(tcp, secret, r.Client.Scheme()); orErr != nil {
+			return orErr
+		}
+
+		return ctrl.SetControllerReference(tcp, secret, r.Client.Scheme())
+	})
+	if err != nil {
+		return errors.Wrap(err, "cannot create or update generated Kubeconfig")
+	}
+
+	return nil
+}
+
+func (r *KubeconfigGeneratorReconciler) isValid(secret *corev1.Secret, tmpl *clientcmdapiv1.Config, groups sets.Set[string], user string) (bool, error) {
+	if utilities.IsRotationRequested(secret) {
+		return false, nil
+	}
+
+	concrete, decodeErr := utilities.DecodeKubeconfig(*secret, "value")
+	if decodeErr != nil {
+		return false, decodeErr
+	}
+	// Checking Certificate Authority validity
+	switch {
+	case len(concrete.Clusters) != len(tmpl.Clusters):
+		return false, nil
+	default:
+		for i := range tmpl.Clusters {
+			if !bytes.Equal(tmpl.Clusters[i].Cluster.CertificateAuthorityData, concrete.Clusters[i].Cluster.CertificateAuthorityData) {
+				return false, nil
+			}
+
+			if tmpl.Clusters[i].Cluster.Server != concrete.Clusters[i].Cluster.Server {
+				return false, nil
+			}
+		}
+	}
+
+	for _, auth := range concrete.AuthInfos {
+		valid, vErr := crypto.IsValidCertificateKeyPairBytes(auth.AuthInfo.ClientCertificateData, auth.AuthInfo.ClientKeyData, r.NotValidThreshold)
+		if vErr != nil {
+			return false, vErr
+		}
+		if !valid {
+			return false, nil
+		}
+
+		crt, crtErr := crypto.ParseCertificateBytes(auth.AuthInfo.ClientCertificateData)
+		if crtErr != nil {
+			return false, crtErr
+		}
+
+		if crt.Subject.CommonName != user {
+			return false, nil
+		}
+
+		if !sets.New[string](crt.Subject.Organization...).Equal(groups) {
+			return false, nil
+		}
+	}
+
+	return true, nil
+}
+
+func (r *KubeconfigGeneratorReconciler) SetupWithManager(mgr manager.Manager) error {
+	return ctrl.NewControllerManagedBy(mgr).
+		For(&kamajiv1alpha1.KubeconfigGenerator{}).
+		WatchesRawSource(source.Channel(r.CertificateChan, handler.Funcs{GenericFunc: func(_ context.Context, genericEvent event.TypedGenericEvent[client.Object], w workqueue.TypedRateLimitingInterface[reconcile.Request]) {
+			w.AddRateLimited(ctrl.Request{
+				NamespacedName: types.NamespacedName{
+					Name: genericEvent.Object.GetName(),
+				},
+			})
+		}})).
+		Watches(&corev1.Secret{}, handler.TypedEnqueueRequestsFromMapFunc(func(ctx context.Context, object client.Object) []ctrl.Request {
+			if object.GetLabels() == nil {
+				return nil
+			}
+
+			v, found := object.GetLabels()[kamajiv1alpha1.ManagedByLabel]
+			if !found {
+				return nil
+			}
+
+			return []ctrl.Request{
+				{
+					NamespacedName: types.NamespacedName{
+						Name: v,
+					},
+				},
+			}
+		})).
+		Complete(r)
+}

controllers/kubeconfiggenerator_watcher.go

@@ -0,0 +1,75 @@
+// Copyright 2022 Clastix Labs
+// SPDX-License-Identifier: Apache-2.0
+
+package controllers
+
+import (
+	"context"
+
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/labels"
+	ctrl "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+	"sigs.k8s.io/controller-runtime/pkg/event"
+	"sigs.k8s.io/controller-runtime/pkg/log"
+	"sigs.k8s.io/controller-runtime/pkg/manager"
+
+	kamajiv1alpha1 "github.com/clastix/kamaji/api/v1alpha1"
+)
+
+type KubeconfigGeneratorWatcher struct {
+	Client        client.Client
+	GeneratorChan chan event.GenericEvent
+}
+
+func (r *KubeconfigGeneratorWatcher) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
+	logger := log.FromContext(ctx)
+
+	logger.Info("reconciling resource")
+
+	var tcp kamajiv1alpha1.TenantControlPlane
+	if err := r.Client.Get(ctx, req.NamespacedName, &tcp); err != nil {
+		if apierrors.IsNotFound(err) {
+			logger.Info("resource may have been deleted, skipping")
+
+			return ctrl.Result{}, nil
+		}
+
+		logger.Error(err, "cannot retrieve the required resource")
+
+		return ctrl.Result{}, err
+	}
+
+	var generators kamajiv1alpha1.KubeconfigGeneratorList
+	if err := r.Client.List(ctx, &generators); err != nil {
+		logger.Error(err, "cannot list generators")
+
+		return ctrl.Result{}, err
+	}
+
+	for _, generator := range generators.Items {
+		sel, err := metav1.LabelSelectorAsSelector(&generator.Spec.TenantControlPlaneSelector)
+		if err != nil {
+			logger.Error(err, "cannot validate Selector", "generator", generator.Name)
+
+			return ctrl.Result{}, err
+		}
+
+		if sel.Matches(labels.Set(tcp.Labels)) {
+			logger.Info("pushing Generator", "generator", generator.Name)
+
+			r.GeneratorChan <- event.GenericEvent{
+				Object: &generator,
+			}
+		}
+	}
+
+	return ctrl.Result{}, nil
+}
+
+func (r *KubeconfigGeneratorWatcher) SetupWithManager(mgr manager.Manager) error {
+	return ctrl.NewControllerManagedBy(mgr).
+		For(&kamajiv1alpha1.TenantControlPlane{}).
+		Complete(r)
+}

controllers/soot/controllers/write_permissions.go

@@ -0,0 +1,207 @@
+// Copyright 2022 Clastix Labs
+// SPDX-License-Identifier: Apache-2.0
+
+package controllers
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/go-logr/logr"
+	admissionregistrationv1 "k8s.io/api/admissionregistration/v1"
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/kubernetes/cmd/kubeadm/app/util/errors"
+	"k8s.io/utils/ptr"
+	controllerruntime "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/builder"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+	"sigs.k8s.io/controller-runtime/pkg/controller"
+	"sigs.k8s.io/controller-runtime/pkg/event"
+	"sigs.k8s.io/controller-runtime/pkg/handler"
+	"sigs.k8s.io/controller-runtime/pkg/manager"
+	"sigs.k8s.io/controller-runtime/pkg/predicate"
+	"sigs.k8s.io/controller-runtime/pkg/reconcile"
+	"sigs.k8s.io/controller-runtime/pkg/source"
+
+	kamajiv1alpha1 "github.com/clastix/kamaji/api/v1alpha1"
+	sooterrors "github.com/clastix/kamaji/controllers/soot/controllers/errors"
+	"github.com/clastix/kamaji/controllers/utils"
+	"github.com/clastix/kamaji/internal/utilities"
+)
+
+type WritePermissions struct {
+	Logger                    logr.Logger
+	Client                    client.Client
+	GetTenantControlPlaneFunc utils.TenantControlPlaneRetrievalFn
+	WebhookNamespace          string
+	WebhookServiceName        string
+	WebhookCABundle           []byte
+	TriggerChannel            chan event.GenericEvent
+}
+
+func (r *WritePermissions) Reconcile(ctx context.Context, _ reconcile.Request) (reconcile.Result, error) {
+	tcp, err := r.GetTenantControlPlaneFunc()
+	if err != nil {
+		if errors.Is(err, sooterrors.ErrPausedReconciliation) {
+			r.Logger.Info(err.Error())
+
+			return reconcile.Result{}, nil
+		}
+
+		return reconcile.Result{}, err
+	}
+	// Cannot detect the status of the TenantControlPlane, enqueuing back
+	if tcp.Status.Kubernetes.Version.Status == nil {
+		return reconcile.Result{RequeueAfter: time.Second}, nil
+	}
+
+	switch {
+	case ptr.Deref(tcp.Status.Kubernetes.Version.Status, kamajiv1alpha1.VersionUnknown) == kamajiv1alpha1.VersionWriteLimited &&
+		tcp.Spec.WritePermissions.HasAnyLimitation():
+		err = r.createOrUpdate(ctx, tcp.Spec.WritePermissions)
+	default:
+		err = r.cleanup(ctx)
+	}
+
+	if err != nil {
+		r.Logger.Error(err, "reconciliation failed")
+
+		return reconcile.Result{}, err
+	}
+
+	return reconcile.Result{}, nil
+}
+
+func (r *WritePermissions) createOrUpdate(ctx context.Context, writePermissions kamajiv1alpha1.Permissions) error {
+	obj := r.object().DeepCopy()
+
+	_, err := utilities.CreateOrUpdateWithConflict(ctx, r.Client, obj, func() error {
+		obj.Webhooks = []admissionregistrationv1.ValidatingWebhook{
+			{
+				Name: "leases.write-permissions.kamaji.clastix.io",
+				ClientConfig: admissionregistrationv1.WebhookClientConfig{
+					URL:      ptr.To(fmt.Sprintf("https://%s.%s.svc:443/write-permission", r.WebhookServiceName, r.WebhookNamespace)),
+					CABundle: r.WebhookCABundle,
+				},
+				Rules: []admissionregistrationv1.RuleWithOperations{
+					{
+						Operations: []admissionregistrationv1.OperationType{
+							admissionregistrationv1.Create,
+							admissionregistrationv1.Delete,
+						},
+						Rule: admissionregistrationv1.Rule{
+							APIGroups:   []string{"*"},
+							APIVersions: []string{"*"},
+							Resources:   []string{"*"},
+							Scope:       ptr.To(admissionregistrationv1.NamespacedScope),
+						},
+					},
+				},
+				FailurePolicy: ptr.To(admissionregistrationv1.Fail),
+				MatchPolicy:   ptr.To(admissionregistrationv1.Equivalent),
+				NamespaceSelector: &metav1.LabelSelector{
+					MatchExpressions: []metav1.LabelSelectorRequirement{
+						{
+							Key:      "kubernetes.io/metadata.name",
+							Operator: metav1.LabelSelectorOpIn,
+							Values: []string{
+								"kube-node-lease",
+							},
+						},
+					},
+				},
+				SideEffects:             ptr.To(admissionregistrationv1.SideEffectClassNoneOnDryRun),
+				AdmissionReviewVersions: []string{"v1"},
+			},
+			{
+				Name: "catchall.write-permissions.kamaji.clastix.io",
+				ClientConfig: admissionregistrationv1.WebhookClientConfig{
+					URL:      ptr.To(fmt.Sprintf("https://%s.%s.svc:443/write-permission", r.WebhookServiceName, r.WebhookNamespace)),
+					CABundle: r.WebhookCABundle,
+				},
+				Rules: []admissionregistrationv1.RuleWithOperations{
+					{
+						Operations: func() []admissionregistrationv1.OperationType {
+							var ops []admissionregistrationv1.OperationType
+
+							if writePermissions.BlockCreate {
+								ops = append(ops, admissionregistrationv1.Create)
+							}
+
+							if writePermissions.BlockUpdate {
+								ops = append(ops, admissionregistrationv1.Update)
+							}
+
+							if writePermissions.BlockDelete {
+								ops = append(ops, admissionregistrationv1.Delete)
+							}
+
+							return ops
+						}(),
+						Rule: admissionregistrationv1.Rule{
+							APIGroups:   []string{"*"},
+							APIVersions: []string{"*"},
+							Resources:   []string{"*"},
+							Scope:       ptr.To(admissionregistrationv1.AllScopes),
+						},
+					},
+				},
+				FailurePolicy: ptr.To(admissionregistrationv1.Fail),
+				MatchPolicy:   ptr.To(admissionregistrationv1.Equivalent),
+				NamespaceSelector: &metav1.LabelSelector{
+					MatchExpressions: []metav1.LabelSelectorRequirement{
+						{
+							Key:      "kubernetes.io/metadata.name",
+							Operator: metav1.LabelSelectorOpNotIn,
+							Values: []string{
+								"kube-system",
+								"kube-node-lease",
+							},
+						},
+					},
+				},
+				SideEffects:             ptr.To(admissionregistrationv1.SideEffectClassNoneOnDryRun),
+				TimeoutSeconds:          nil,
+				AdmissionReviewVersions: []string{"v1"},
+			},
+		}
+
+		return nil
+	})
+
+	return err
+}
+
+func (r *WritePermissions) cleanup(ctx context.Context) error {
+	if err := r.Client.Delete(ctx, r.object()); err != nil {
+		if apierrors.IsNotFound(err) {
+			return nil
+		}
+
+		return fmt.Errorf("unable to clean-up ValidationWebhook required for write permissions: %w", err)
+	}
+
+	return nil
+}
+
+func (r *WritePermissions) SetupWithManager(mgr manager.Manager) error {
+	r.TriggerChannel = make(chan event.GenericEvent)
+
+	return controllerruntime.NewControllerManagedBy(mgr).
+		WithOptions(controller.TypedOptions[reconcile.Request]{SkipNameValidation: ptr.To(true)}).
+		For(&admissionregistrationv1.ValidatingWebhookConfiguration{}, builder.WithPredicates(predicate.NewPredicateFuncs(func(object client.Object) bool {
+			return object.GetName() == r.object().GetName()
+		}))).
+		WatchesRawSource(source.Channel(r.TriggerChannel, &handler.EnqueueRequestForObject{})).
+		Complete(r)
+}
+
+func (r *WritePermissions) object() *admissionregistrationv1.ValidatingWebhookConfiguration {
+	return &admissionregistrationv1.ValidatingWebhookConfiguration{
+		ObjectMeta: metav1.ObjectMeta{
+			Name: "kamaji-write-permissions",
+		},
+	}
+}

controllers/soot/manager.go

@@ -253,6 +253,19 @@ func (m *Manager) Reconcile(ctx context.Context, request reconcile.Request) (res
 	//
 	// Register all the controllers of the soot here:
 	//
+	writePermissions := &controllers.WritePermissions{
+		Logger:                    mgr.GetLogger().WithName("writePermissions"),
+		Client:                    mgr.GetClient(),
+		GetTenantControlPlaneFunc: m.retrieveTenantControlPlane(tcpCtx, request),
+		WebhookNamespace:          m.MigrateServiceNamespace,
+		WebhookServiceName:        m.MigrateServiceName,
+		WebhookCABundle:           m.MigrateCABundle,
+		TriggerChannel:            nil,
+	}
+	if err = writePermissions.SetupWithManager(mgr); err != nil {
+		return reconcile.Result{}, err
+	}
+
 	migrate := &controllers.Migrate{
 		WebhookNamespace:          m.MigrateServiceNamespace,
 		WebhookServiceName:        m.MigrateServiceName,
@@ -370,6 +383,7 @@ func (m *Manager) Reconcile(ctx context.Context, request reconcile.Request) (res
 
 	m.sootMap[request.NamespacedName.String()] = sootItem{
 		triggers: []chan event.GenericEvent{
+			writePermissions.TriggerChannel,
 			migrate.TriggerChannel,
 			konnectivityAgent.TriggerChannel,
 			kubeProxy.TriggerChannel,

docs/content/cluster-api/proxmox-infra-provider.md

@@ -14,15 +14,18 @@ To use the Proxmox Cluster API provider, you must connect and authenticate to a
 
 ```bash
 # The Proxmox VE host
-export PROXMOX_URL: "https://pve.example:8006"
+export PROXMOX_URL="https://pve.example:8006"
 
 # The Proxmox VE TokenID for authentication
-export PROXMOX_TOKEN: "clastix@pam!capi"
+export PROXMOX_TOKEN='clastix@pam!capi'
 
 # The secret associated with the TokenID
-export PROXMOX_SECRET: "REDACTED"
+export PROXMOX_SECRET="REDACTED"
 ```
 
+!!! warning "Env escaping "
+    Pay attention to escape special characters, such as `\` and `!`
+
 Install the Infrastructure Provider:
 
 ```bash
@@ -72,6 +75,14 @@ Set the following environment variables to configure the workload machines:
 # Node Configuration
 export SSH_USER="clastix"
 export SSH_AUTHORIZED_KEY="ssh-rsa AAAAB3Nz ..."
+export NODE_LABELS="datacenter=us-west,instance-type=large"
+export NODE_TAINTS="environment=production:PreferNoSchedule"
+
+# You can add additional cloud-init configuration to further customize
+# the worker nodes by setting the CLOUD_INIT_CONFIG environment variable:
+export CLOUD_INIT_CONFIG="#cloud-config package_update: true packages: - net-tools"
+
+# Number of worker nodes
 export NODE_REPLICAS=2
 
 # Resource Configuration
@@ -85,6 +96,7 @@ export BOOT_VOLUME_DEVICE="scsi0"
 export BOOT_VOLUME_SIZE=20
 export FILE_STORAGE_FORMAT="qcow2"
 export STORAGE_NODE="local"
+export POOL_NAME="sample-pool"
 ```
 
 Use the following command to generate a cluster manifest based on the [`capi-kamaji-proxmox-template.yaml`](https://raw.githubusercontent.com/clastix/cluster-api-control-plane-provider-kamaji/master/templates/proxmox/capi-kamaji-proxmox-template.yaml) template file:
@@ -95,38 +107,8 @@ clusterctl generate cluster $CLUSTER_NAME \
     > capi-kamaji-proxmox-cluster.yaml
 ```
 
-### Additional cloud-init configuration
-
-Cluster API requires machine templates based on `cloud-init`. You can add additional `cloud-init` configuration to further customize the worker nodes by including an additional `cloud-init` file in the `KubeadmConfigTemplate`:
-
-```yaml
-kind: KubeadmConfigTemplate
-apiVersion: bootstrap.cluster.x-k8s.io/v1beta1
-metadata:
-  name: ${CLUSTER_NAME}-md-0
-spec:
-  template:
-    spec:
-      files:
-      - path: "/etc/cloud/cloud.cfg.d/99-custom.cfg"
-        content: "${CLOUD_INIT_CONFIG:-}"
-        owner: "root:root"
-        permissions: "0644"
-```
-
-You can then set the `CLOUD_INIT_CONFIG` environment variable to include the additional configuration:
-
-```bash
-export CLOUD_INIT_CONFIG="#cloud-config package_update: true packages: - net-tools"
-```
-
-and include it in the `clusterctl generate cluster` command:
-
-```bash
-clusterctl generate cluster $CLUSTER_NAME \
-    --from capi-kamaji-proxmox-template.yaml \
-    > capi-kamaji-proxmox-cluster.yaml
-```
+!!! warning "Customize the Template"
+    Before to generate cluster manifest, review and edit the template `capi-kamaji-proxmox-template.yaml` to customize.
 
 ### Apply the Cluster Manifest
 

docs/content/concepts/index.md

@@ -27,7 +27,7 @@ Kamaji is an open source Kubernetes Operator that transforms any Kubernetes clus
   Kamaji leverages Kubernetes Custom Resource Definitions (CRDs) to provide a fully declarative approach to managing control planes, datastores, and other resources.
 
 - **CNCF Compliance:**  
-  Kamaji uses upstream, unmodified Kubernetes components and kubeadm for control plane setup, ensuring that all Tenant Clusters are [CNCF Certified Kubernetes](https://www.cncf.io/certification/software-conformance/) and compatible with standard Kubernetes tooling.
+  Kamaji uses upstream, unmodified Kubernetes components and kubeadm for control plane setup, ensuring that all Tenant Clusters follow [CNCF Certified Kubernetes Software Conformance](https://www.cncf.io/certification/software-conformance/) and are compatible with standard Kubernetes tooling.
 
 ## Extensibility and Integrations
 
@@ -54,4 +54,4 @@ Explore the following concepts to understand how Kamaji works under the hood:
 - [Tenant Worker Nodes](tenant-worker-nodes.md)
 - [Konnectivity](konnectivity.md)
 
-Kamaji’s architecture is designed for flexibility, scalability, and operational simplicity, making it an ideal solution for organizations managing multiple Kubernetes clusters at scale.
+Kamaji’s architecture is designed for flexibility, scalability, and operational simplicity, making it an ideal solution for organizations managing multiple Kubernetes clusters at scale.

docs/content/getting-started/kamaji-aws.md

@@ -166,6 +166,17 @@ helm repo update
 helm install kamaji clastix/kamaji -n kamaji-system --create-namespace --version 0.0.0+latest
 ```
 
+!!! note "Alternative: Two-Step Installation"
+    The kamaji chart includes CRDs. For separate CRD management (GitOps, policy requirements), install CRDs first:
+
+```bash
+# Step 1: Install CRDs
+helm install kamaji-crds clastix/kamaji-crds -n kamaji-system --create-namespace --version 0.0.0+latest
+
+# Step 2: Install Kamaji operator
+helm install kamaji clastix/kamaji -n kamaji-system --version 0.0.0+latest
+```
+
 ## Create Tenant Cluster
 
 Now that our management cluster is up and running, we can create a Tenant Cluster. A Tenant Cluster is a Kubernetes cluster that is managed by Kamaji.

docs/content/getting-started/kamaji-generic.md

@@ -86,6 +86,17 @@ helm install kamaji clastix/kamaji \
     --set image.tag=latest
 ```
 
+!!! note "Alternative: Two-Step Installation"
+    The kamaji chart includes CRDs. For separate CRD management (GitOps, policy requirements), install CRDs first
+
+```bash
+# Step 1: Install CRDs
+helm install kamaji-crds clastix/kamaji-crds -n kamaji-system --create-namespace --version 0.0.0+latest
+
+# Step 2: Install Kamaji operator
+helm install kamaji clastix/kamaji -n kamaji-system --version 0.0.0+latest
+```
+
 After installation, verify that Kamaji and its components are running:
 
 ```bash

docs/content/guides/gitops.md

@@ -4,6 +4,57 @@ This guide describe a declarative way to deploy Kubernetes add-ons across multip
 
 This way the tenant resources can be ensured from a single pane of glass, from the *Management Cluster*.
 
+## Installing Kamaji with GitOps
+
+For GitOps workflows using tools like FluxCD or ArgoCD, the kamaji-crds chart enables separate CRD management:
+
+```yaml
+# Step 1: HelmRelease for CRDs
+apiVersion: helm.toolkit.fluxcd.io/v2beta1
+kind: HelmRelease
+metadata:
+  name: kamaji-crds
+  namespace: kamaji-system
+spec:
+  interval: 10m
+  chart:
+    spec:
+      chart: kamaji-crds
+      version: 0.0.0+latest
+      sourceRef:
+        kind: HelmRepository
+        name: clastix
+        namespace: flux-system
+---
+# Step 2: HelmRelease for operator
+apiVersion: helm.toolkit.fluxcd.io/v2beta1
+kind: HelmRelease
+metadata:
+  name: kamaji
+  namespace: kamaji-system
+spec:
+  interval: 10m
+  dependsOn:
+    - name: kamaji-crds
+  chart:
+    spec:
+      chart: kamaji
+      version: 0.0.0+latest
+      sourceRef:
+        kind: HelmRepository
+        name: clastix
+        namespace: flux-system
+```
+
+!!! note "CRD Management Options"
+    The kamaji chart includes CRDs in its `crds/` directory. Using the separate kamaji-crds chart is optional and beneficial for:
+
+    - GitOps workflows requiring separate CRD lifecycle management
+    - Organizations with policies requiring separate CRD approval
+    - Scenarios where CRD updates must precede operator updates
+
+    For standard installations, using the kamaji chart alone is sufficient.
+
 ## Flux as the GitOps operator
 
 As GitOps ensures a constant reconciliation to a Git-versioned desired state, [Flux](https://fluxcd.io) can satisfy the requirement of those scenarios. In particular, the controllers that reconcile [resources](https://fluxcd.io/flux/concepts/#reconciliation) support communicating to external clusters.

docs/content/guides/kubeconfig-generator.md

@@ -0,0 +1,114 @@
+# Kubeconfig Generator
+
+The **Kubeconfig Generator** is a Kamaji extension that simplifies the distribution of Kubeconfig files for tenant clusters managed through Kamaji.
+
+Instead of manually exporting and editing credentials, the generator automates the creation of kubeconfigs aligned with your organizational policies.
+
+## Motivation
+
+When managing multiple Tenant Control Planes (TCPs), cluster administrators often face two challenges:
+
+1. **Consistency**: ensuring kubeconfigs are generated with the correct user identity, groups, and endpoints
+2. **Scalability**: distributing kubeconfigs to users across potentially dozens of tenant clusters without manual steps
+
+The `KubeconfigGenerator` resource addresses these problems by:
+
+- Selecting which TCPs to target via label selectors.
+- Defining how to build user and group identities in kubeconfigs.
+- Automatically maintaining kubeconfigs as new tenant clusters are created or updated.
+
+This provides a single, declarative way to manage kubeconfig lifecycle across all your tenants,
+especially convenient if those cases where an Identity Provider can't be used to delegate access to Tenant Control Plane clusters.
+
+## How it Works
+
+### Selection
+
+- `namespaceSelector` filters the namespaces from which Tenant Control Planes are discovered.
+- `tenantControlPlaneSelector` further refines which TCPs to include.
+
+### Identity Definition
+
+The `user` and `groups` fields use compound values, which can be either:
+
+- A static string (e.g., `developer`)
+- A dynamic reference resolved from the TCP object (e.g., `metadata.name`)
+
+This allows kubeconfigs to be tailored to the cluster’s context or a fixed organizational pattern.
+
+### Endpoint Resolution
+
+The generator pulls the API server endpoint from the TCP’s `admin` kubeconfig.
+
+By default it uses the `admin.svc` template, but this can be overridden with the `controlPlaneEndpointFrom` field.
+
+### Status and Errors
+
+The resource keeps track of how many kubeconfigs were attempted, how many succeeded,
+and provides detailed error reports for failed generations.
+
+## Typical Use Cases
+
+- **Platform Operators**: automatically distribute kubeconfigs to developers as new tenant clusters are provisioned.
+- **Multi-team Environments**: ensure each team gets kubeconfigs with the correct groups for RBAC authorization.
+- **Least Privilege Principle**: avoid distributing `cluster-admin` credentials with a fine-grained RBAC
+- **Dynamic Access**: use `fromDefinition` references to bind kubeconfig identities directly to tenant metadata
+ (e.g., prefixing users with the TCP's name).
+
+## Example Scenario
+
+A SaaS provider runs multiple Tenant Control Planes, each corresponding to a different customer.
+Instead of manually managing kubeconfigs for every customer environment, the operator defines a single `KubeconfigGenerator`:
+
+```yaml
+apiVersion: kamaji.clastix.io/v1alpha1
+kind: KubeconfigGenerator
+metadata:
+  name: tenant
+spec:
+  # Select only Tenant Control Planes living in namespaces
+  # labeled as production environments
+  namespaceSelector:
+    matchLabels:
+      environment: production
+  # Match all Tenant Control Planes in those namespaces
+  tenantControlPlaneSelector: {}
+  # Assign a static group "customer-admins"
+  groups:
+    - stringValue: "customer-admins"
+  # Derive the user identity dynamically from the TenantControlPlane metadata
+  user:
+    fromDefinition: "metadata.name"
+  # Use the public admin endpoint from the TCP’s kubeconfig
+  controlPlaneEndpointFrom: "admin.conf"
+```
+
+- Matches all TCPs in namespaces labeled `environment=production`.
+- Generates kubeconfigs with group `customer-admins`.
+- Derives the user identity from the TCP’s `metadata.name`.
+
+As new tenants are created, their kubeconfigs are generated automatically and kept up to date.
+
+```
+$: kubectl get secret --all-namespaces -l kamaji.clastix.io/managed-by=tenant
+NAMESPACE       NAME             TYPE     DATA   AGE
+alpha-tnt       env-133-tenant   Opaque   1      12h
+alpha-tnt       env-130-tenant   Opaque   1      2d
+bravo-tnt       prod-tenant      Opaque   1      2h
+charlie-tnt     stable-tenant    Opaque   1      1d
+```
+
+## Observability
+
+The generator exposes its status directly in the CRD:
+- `resources`: total number of TCPs targeted.
+- `availableResources`: successfully generated kubeconfigs.
+- `errors`: list of failed kubeconfig generations, including the affected resource and error message.
+
+This allows quick debugging and operational awareness.
+
+## Deployment
+
+The _Kubeconfig Generator_ is **not** enabled by default since it's still in experimental state.
+
+It can be enabled using the Helm value `kubeconfigGenerator.enabled=true` which is defaulted to `false`.

docs/content/guides/write-permissions.md

@@ -0,0 +1,115 @@
+# Write Permissions
+
+Using the _Write Permissions_ section, operators can limit write operations for a given Tenant Control Plane,
+where no further write actions can be made by its tenants.
+
+This feature ensures consistency during maintenance, migrations, incident recovery, quote enforcement,
+or when freezing workloads for auditing and compliance purposes.
+
+Write Operations can limit the following actions:
+
+- Create
+- Update
+- Delete
+
+By default, all write operations are allowed.
+
+## Enabling a Read-Only mode
+
+You can enable ReadOnly mode by setting all the boolean fields of `TenantControlPlane.spec.writePermissions` to `true`.
+
+```yaml
+apiVersion: kamaji.clastix.io/v1alpha1
+kind: TenantControlPlane
+metadata:
+  name: my-control-plane
+spec:
+  writePermissions:
+    blockCreate: true
+    blockUpdate: true
+    blockDelete: true
+```
+
+Once applied, the Tenant Control Plane will switch into `WriteLimited` status.
+
+## Enforcing a quota mode
+
+If your Tenant Control Plane has a Datastore quota, this feature allows freezing write and update operations,
+but still allowing its tenants to perform a clean-up by deleting exceeding resources.
+
+```yaml
+apiVersion: kamaji.clastix.io/v1alpha1
+kind: TenantControlPlane
+metadata:
+  name: my-control-plane
+spec:
+  writePermissions:
+    blockCreate: true
+    blockUpdate: true
+    blockDelete: false
+```
+
+!!! note "Datastore quota"
+    Kamaji does **not** enforce storage quota for a given Tenant Control Plane:
+    you have to implement it according to your business logic.
+
+## Monitoring the status
+
+You can verify the status of your Tenant Control Plane with `kubectl get tcp`:
+
+```json
+$: kubectl get tcp k8s-133
+NAME      VERSION   INSTALLED VERSION   STATUS         CONTROL-PLANE ENDPOINT   KUBECONFIG                 DATASTORE   AGE
+k8s-133   v1.33.0   v1.33.0             WriteLimited   172.18.255.100:6443      k8s-133-admin-kubeconfig   default     50d
+```
+
+The `STATUS` field will display `WriteLimited` when write permissions are limited.
+
+## How it works
+
+When a Tenant Control Plane write status is _limited_, Kamaji creates a `ValidatingWebhookConfiguration` in the Tenant Cluster:
+
+```
+$: kubectl get validatingwebhookconfigurations
+NAME                       WEBHOOKS   AGE
+kamaji-write-permissions   2          59m
+```
+
+The webhook intercepts all API requests to the Tenant Control Plane and programmatically denies any attempts to modify resources.
+
+As a result, all changes initiated by tenants (such as `kubectl apply`, `kubectl delete`, or CRD updates) could be blocked.
+
+!!! warning "Operators and Controller"
+    When the write status is limited, all actions are intercepted by the webhook.
+    If a Pod must be rescheduled, the webhook will deny it.
+
+## Behaviour with limited write operations
+
+If a tenant user tries to perform non-allowed write operations, such as:
+
+- creating resources when `TenantControlPlane.spec.writePermissions.blockCreate` is set to `true`
+- updating resources when `TenantControlPlane.spec.writePermissions.blockUpdate` is set to `true`
+- deleting resources when `TenantControlPlane.spec.writePermissions.blockDelete` is set to `true`
+
+the following error is returned:
+
+```
+Error from server (Forbidden): admission webhook "catchall.write-permissions.kamaji.clastix.io" denied the request:
+the current Control Plane has limited write permissions, current changes are blocked:
+removing the webhook may lead to an inconsistent state upon its completion
+```
+
+This guarantees the cluster remains in a frozen, consistent state, preventing partial updates or drift.
+
+## Use Cases
+
+Typical scenarios where ReadOnly mode is useful:
+
+- **Planned Maintenance**: freeze workloads before performing upgrades or infrastructure changes.
+- **Disaster Recovery**: lock the Tenant Control Plane to prevent accidental modifications during incident handling.
+- **Auditing & Compliance**: ensure workloads cannot be altered during a compliance check or certification process.
+- **Quota Enforcement**: preventing Datastore quote over commit in terms of storage size.
+
+!!! info "Migrating the DataStore"
+    In a similar manner, when migrating a Tenant Control Plane to a different store, similar enforcement is put in place.
+    This is managed automatically by Kamaji: there's no need to toggle on and off the ReadOnly mode.

docs/content/reference/api.md

@@ -27271,6 +27271,8 @@ Resource Types:
 
 - [DataStore](#datastore)
 
+- [KubeconfigGenerator](#kubeconfiggenerator)
+
 - [TenantControlPlane](#tenantcontrolplane)
 
 
@@ -27985,6 +27987,415 @@ DataStoreStatus defines the observed state of DataStore.
       </tr></tbody>
 </table>
 
+### KubeconfigGenerator
+
+
+
+
+
+KubeconfigGenerator is the Schema for the kubeconfiggenerators API.
+
+<table>
+    <thead>
+        <tr>
+            <th>Name</th>
+            <th>Type</th>
+            <th>Description</th>
+            <th>Required</th>
+        </tr>
+    </thead>
+    <tbody><tr>
+      <td><b>apiVersion</b></td>
+      <td>string</td>
+      <td>kamaji.clastix.io/v1alpha1</td>
+      <td>true</td>
+      </tr>
+      <tr>
+      <td><b>kind</b></td>
+      <td>string</td>
+      <td>KubeconfigGenerator</td>
+      <td>true</td>
+      </tr>
+      <tr>
+      <td><b><a href="https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.20/#objectmeta-v1-meta">metadata</a></b></td>
+      <td>object</td>
+      <td>Refer to the Kubernetes API documentation for the fields of the `metadata` field.</td>
+      <td>true</td>
+      </tr><tr>
+        <td><b><a href="#kubeconfiggeneratorspec">spec</a></b></td>
+        <td>object</td>
+        <td>
+          <br/>
+        </td>
+        <td>false</td>
+      </tr><tr>
+        <td><b><a href="#kubeconfiggeneratorstatus">status</a></b></td>
+        <td>object</td>
+        <td>
+          KubeconfigGeneratorStatus defines the observed state of KubeconfigGenerator.<br/>
+        </td>
+        <td>false</td>
+      </tr></tbody>
+</table>
+
+
+<span id="kubeconfiggeneratorspec">`KubeconfigGenerator.spec`</span>
+
+
+
+
+<table>
+    <thead>
+        <tr>
+            <th>Name</th>
+            <th>Type</th>
+            <th>Description</th>
+            <th>Required</th>
+        </tr>
+    </thead>
+    <tbody><tr>
+        <td><b><a href="#kubeconfiggeneratorspecuser">user</a></b></td>
+        <td>object</td>
+        <td>
+          User resolves to a string to identify the client, assigned to the x509 Common Name field.<br/>
+        </td>
+        <td>true</td>
+      </tr><tr>
+        <td><b>controlPlaneEndpointFrom</b></td>
+        <td>string</td>
+        <td>
+          ControlPlaneEndpointFrom is the key used to extract the Tenant Control Plane endpoint that must be used by the generator.
+The targeted Secret is the `${TCP}-admin-kubeconfig` one, default to `admin.svc`.<br/>
+          <br/>
+            <i>Default</i>: admin.svc<br/>
+        </td>
+        <td>false</td>
+      </tr><tr>
+        <td><b><a href="#kubeconfiggeneratorspecgroupsindex">groups</a></b></td>
+        <td>[]object</td>
+        <td>
+          Groups is resolved a set of strings used to assign the x509 organisations field.
+It will be recognised by Kubernetes as user groups.<br/>
+        </td>
+        <td>false</td>
+      </tr><tr>
+        <td><b><a href="#kubeconfiggeneratorspecnamespaceselector">namespaceSelector</a></b></td>
+        <td>object</td>
+        <td>
+          NamespaceSelector is used to filter Namespaces from which the generator should extract TenantControlPlane objects.<br/>
+        </td>
+        <td>false</td>
+      </tr><tr>
+        <td><b><a href="#kubeconfiggeneratorspectenantcontrolplaneselector">tenantControlPlaneSelector</a></b></td>
+        <td>object</td>
+        <td>
+          TenantControlPlaneSelector is used to filter the TenantControlPlane objects that should be address by the generator.<br/>
+        </td>
+        <td>false</td>
+      </tr></tbody>
+</table>
+
+
+<span id="kubeconfiggeneratorspecuser">`KubeconfigGenerator.spec.user`</span>
+
+
+User resolves to a string to identify the client, assigned to the x509 Common Name field.
+
+<table>
+    <thead>
+        <tr>
+            <th>Name</th>
+            <th>Type</th>
+            <th>Description</th>
+            <th>Required</th>
+        </tr>
+    </thead>
+    <tbody><tr>
+        <td><b>fromDefinition</b></td>
+        <td>string</td>
+        <td>
+          FromDefinition is used to generate a dynamic value,
+it uses the dot notation to access fields from the referenced TenantControlPlane object:
+e.g.: metadata.name<br/>
+        </td>
+        <td>false</td>
+      </tr><tr>
+        <td><b>stringValue</b></td>
+        <td>string</td>
+        <td>
+          StringValue is a static string value.<br/>
+        </td>
+        <td>false</td>
+      </tr></tbody>
+</table>
+
+
+<span id="kubeconfiggeneratorspecgroupsindex">`KubeconfigGenerator.spec.groups[index]`</span>
+
+
+CompoundValue allows defining a static, or a dynamic value.
+Options are mutually exclusive, just one should be picked up.
+
+<table>
+    <thead>
+        <tr>
+            <th>Name</th>
+            <th>Type</th>
+            <th>Description</th>
+            <th>Required</th>
+        </tr>
+    </thead>
+    <tbody><tr>
+        <td><b>fromDefinition</b></td>
+        <td>string</td>
+        <td>
+          FromDefinition is used to generate a dynamic value,
+it uses the dot notation to access fields from the referenced TenantControlPlane object:
+e.g.: metadata.name<br/>
+        </td>
+        <td>false</td>
+      </tr><tr>
+        <td><b>stringValue</b></td>
+        <td>string</td>
+        <td>
+          StringValue is a static string value.<br/>
+        </td>
+        <td>false</td>
+      </tr></tbody>
+</table>
+
+
+<span id="kubeconfiggeneratorspecnamespaceselector">`KubeconfigGenerator.spec.namespaceSelector`</span>
+
+
+NamespaceSelector is used to filter Namespaces from which the generator should extract TenantControlPlane objects.
+
+<table>
+    <thead>
+        <tr>
+            <th>Name</th>
+            <th>Type</th>
+            <th>Description</th>
+            <th>Required</th>
+        </tr>
+    </thead>
+    <tbody><tr>
+        <td><b><a href="#kubeconfiggeneratorspecnamespaceselectormatchexpressionsindex">matchExpressions</a></b></td>
+        <td>[]object</td>
+        <td>
+          matchExpressions is a list of label selector requirements. The requirements are ANDed.<br/>
+        </td>
+        <td>false</td>
+      </tr><tr>
+        <td><b>matchLabels</b></td>
+        <td>map[string]string</td>
+        <td>
+          matchLabels is a map of {key,value} pairs. A single {key,value} in the matchLabels
+map is equivalent to an element of matchExpressions, whose key field is "key", the
+operator is "In", and the values array contains only "value". The requirements are ANDed.<br/>
+        </td>
+        <td>false</td>
+      </tr></tbody>
+</table>
+
+
+<span id="kubeconfiggeneratorspecnamespaceselectormatchexpressionsindex">`KubeconfigGenerator.spec.namespaceSelector.matchExpressions[index]`</span>
+
+
+A label selector requirement is a selector that contains values, a key, and an operator that
+relates the key and values.
+
+<table>
+    <thead>
+        <tr>
+            <th>Name</th>
+            <th>Type</th>
+            <th>Description</th>
+            <th>Required</th>
+        </tr>
+    </thead>
+    <tbody><tr>
+        <td><b>key</b></td>
+        <td>string</td>
+        <td>
+          key is the label key that the selector applies to.<br/>
+        </td>
+        <td>true</td>
+      </tr><tr>
+        <td><b>operator</b></td>
+        <td>string</td>
+        <td>
+          operator represents a key's relationship to a set of values.
+Valid operators are In, NotIn, Exists and DoesNotExist.<br/>
+        </td>
+        <td>true</td>
+      </tr><tr>
+        <td><b>values</b></td>
+        <td>[]string</td>
+        <td>
+          values is an array of string values. If the operator is In or NotIn,
+the values array must be non-empty. If the operator is Exists or DoesNotExist,
+the values array must be empty. This array is replaced during a strategic
+merge patch.<br/>
+        </td>
+        <td>false</td>
+      </tr></tbody>
+</table>
+
+
+<span id="kubeconfiggeneratorspectenantcontrolplaneselector">`KubeconfigGenerator.spec.tenantControlPlaneSelector`</span>
+
+
+TenantControlPlaneSelector is used to filter the TenantControlPlane objects that should be address by the generator.
+
+<table>
+    <thead>
+        <tr>
+            <th>Name</th>
+            <th>Type</th>
+            <th>Description</th>
+            <th>Required</th>
+        </tr>
+    </thead>
+    <tbody><tr>
+        <td><b><a href="#kubeconfiggeneratorspectenantcontrolplaneselectormatchexpressionsindex">matchExpressions</a></b></td>
+        <td>[]object</td>
+        <td>
+          matchExpressions is a list of label selector requirements. The requirements are ANDed.<br/>
+        </td>
+        <td>false</td>
+      </tr><tr>
+        <td><b>matchLabels</b></td>
+        <td>map[string]string</td>
+        <td>
+          matchLabels is a map of {key,value} pairs. A single {key,value} in the matchLabels
+map is equivalent to an element of matchExpressions, whose key field is "key", the
+operator is "In", and the values array contains only "value". The requirements are ANDed.<br/>
+        </td>
+        <td>false</td>
+      </tr></tbody>
+</table>
+
+
+<span id="kubeconfiggeneratorspectenantcontrolplaneselectormatchexpressionsindex">`KubeconfigGenerator.spec.tenantControlPlaneSelector.matchExpressions[index]`</span>
+
+
+A label selector requirement is a selector that contains values, a key, and an operator that
+relates the key and values.
+
+<table>
+    <thead>
+        <tr>
+            <th>Name</th>
+            <th>Type</th>
+            <th>Description</th>
+            <th>Required</th>
+        </tr>
+    </thead>
+    <tbody><tr>
+        <td><b>key</b></td>
+        <td>string</td>
+        <td>
+          key is the label key that the selector applies to.<br/>
+        </td>
+        <td>true</td>
+      </tr><tr>
+        <td><b>operator</b></td>
+        <td>string</td>
+        <td>
+          operator represents a key's relationship to a set of values.
+Valid operators are In, NotIn, Exists and DoesNotExist.<br/>
+        </td>
+        <td>true</td>
+      </tr><tr>
+        <td><b>values</b></td>
+        <td>[]string</td>
+        <td>
+          values is an array of string values. If the operator is In or NotIn,
+the values array must be non-empty. If the operator is Exists or DoesNotExist,
+the values array must be empty. This array is replaced during a strategic
+merge patch.<br/>
+        </td>
+        <td>false</td>
+      </tr></tbody>
+</table>
+
+
+<span id="kubeconfiggeneratorstatus">`KubeconfigGenerator.status`</span>
+
+
+KubeconfigGeneratorStatus defines the observed state of KubeconfigGenerator.
+
+<table>
+    <thead>
+        <tr>
+            <th>Name</th>
+            <th>Type</th>
+            <th>Description</th>
+            <th>Required</th>
+        </tr>
+    </thead>
+    <tbody><tr>
+        <td><b>availableResources</b></td>
+        <td>integer</td>
+        <td>
+          AvailableResources is the sum of successfully generated resources.
+In case of a different value compared to Resources, check the field errors.<br/>
+          <br/>
+            <i>Default</i>: 0<br/>
+        </td>
+        <td>true</td>
+      </tr><tr>
+        <td><b>resources</b></td>
+        <td>integer</td>
+        <td>
+          Resources is the sum of targeted TenantControlPlane objects.<br/>
+          <br/>
+            <i>Default</i>: 0<br/>
+        </td>
+        <td>true</td>
+      </tr><tr>
+        <td><b><a href="#kubeconfiggeneratorstatuserrorsindex">errors</a></b></td>
+        <td>[]object</td>
+        <td>
+          Errors is the list of failed kubeconfig generations.<br/>
+        </td>
+        <td>false</td>
+      </tr></tbody>
+</table>
+
+
+<span id="kubeconfiggeneratorstatuserrorsindex">`KubeconfigGenerator.status.errors[index]`</span>
+
+
+
+
+<table>
+    <thead>
+        <tr>
+            <th>Name</th>
+            <th>Type</th>
+            <th>Description</th>
+            <th>Required</th>
+        </tr>
+    </thead>
+    <tbody><tr>
+        <td><b>message</b></td>
+        <td>string</td>
+        <td>
+          Message is the error message recorded upon the last generator run.<br/>
+        </td>
+        <td>true</td>
+      </tr><tr>
+        <td><b>resource</b></td>
+        <td>string</td>
+        <td>
+          Resource is the Namespaced name of the errored resource.<br/>
+        </td>
+        <td>true</td>
+      </tr></tbody>
+</table>
+
 ### TenantControlPlane
 
 
@@ -28112,6 +28523,18 @@ DataStoreUsername by concatenating the namespace and name of the TenantControlPl
           NetworkProfile specifies how the network is<br/>
         </td>
         <td>false</td>
+      </tr><tr>
+        <td><b><a href="#tenantcontrolplanespecwritepermissions">writePermissions</a></b></td>
+        <td>object</td>
+        <td>
+          WritePermissions allows to select which operations (create, delete, update) must be blocked:
+by default, all actions are allowed, and API Server can write to its Datastore.
+
+By blocking all actions, the Tenant Control Plane can enter in a Read Only mode:
+this phase can be used to prevent Datastore quota exhaustion or for your own business logic
+(e.g.: blocking creation and update, but allowing deletion to "clean up" space).<br/>
+        </td>
+        <td>false</td>
       </tr></tbody>
 </table>
 
@@ -41576,6 +41999,50 @@ Example: {"192.168.1.0/24", "10.0.0.0/8"}<br/>
 </table>
 
 
+<span id="tenantcontrolplanespecwritepermissions">`TenantControlPlane.spec.writePermissions`</span>
+
+
+WritePermissions allows to select which operations (create, delete, update) must be blocked:
+by default, all actions are allowed, and API Server can write to its Datastore.
+
+By blocking all actions, the Tenant Control Plane can enter in a Read Only mode:
+this phase can be used to prevent Datastore quota exhaustion or for your own business logic
+(e.g.: blocking creation and update, but allowing deletion to "clean up" space).
+
+<table>
+    <thead>
+        <tr>
+            <th>Name</th>
+            <th>Type</th>
+            <th>Description</th>
+            <th>Required</th>
+        </tr>
+    </thead>
+    <tbody><tr>
+        <td><b>blockCreation</b></td>
+        <td>boolean</td>
+        <td>
+          <br/>
+        </td>
+        <td>false</td>
+      </tr><tr>
+        <td><b>blockDeletion</b></td>
+        <td>boolean</td>
+        <td>
+          <br/>
+        </td>
+        <td>false</td>
+      </tr><tr>
+        <td><b>blockUpdate</b></td>
+        <td>boolean</td>
+        <td>
+          <br/>
+        </td>
+        <td>false</td>
+      </tr></tbody>
+</table>
+
+
 <span id="tenantcontrolplanestatus">`TenantControlPlane.status`</span>
 
 
@@ -43700,7 +44167,7 @@ KubernetesVersion contains the information regarding the running Kubernetes vers
         <td>
           Status returns the current status of the Kubernetes version, such as its provisioning state, or completed upgrade.<br/>
           <br/>
-            <i>Enum</i>: Provisioning, CertificateAuthorityRotating, Upgrading, Migrating, Ready, NotReady, Sleeping<br/>
+            <i>Enum</i>: Unknown, Provisioning, CertificateAuthorityRotating, Upgrading, Migrating, Ready, NotReady, Sleeping, WriteLimited<br/>
             <i>Default</i>: Provisioning<br/>
         </td>
         <td>false</td>

docs/mkdocs.yml

@@ -74,9 +74,11 @@ nav:
   - guides/backup-and-restore.md
   - guides/certs-lifecycle.md
   - guides/pausing.md
+  - guides/write-permissions.md
   - guides/datastore-migration.md
   - guides/gitops.md
   - guides/console.md
+  - guides/kubeconfig-generator.md
   - guides/upgrade.md
   - guides/monitoring.md
   - guides/terraform.md

go.mod

@@ -6,7 +6,7 @@ require (
 	github.com/JamesStewy/go-mysqldump v0.2.2
 	github.com/blang/semver v3.5.1+incompatible
 	github.com/clastix/kamaji-telemetry v1.0.0
-	github.com/docker/docker v28.4.0+incompatible
+	github.com/docker/docker v28.5.1+incompatible
 	github.com/go-logr/logr v1.4.3
 	github.com/go-pg/pg/v10 v10.15.0
 	github.com/go-sql-driver/mysql v1.9.3
@@ -14,8 +14,8 @@ require (
 	github.com/google/uuid v1.6.0
 	github.com/json-iterator/go v1.1.12
 	github.com/juju/mutex/v2 v2.0.0
-	github.com/nats-io/nats.go v1.45.0
-	github.com/onsi/ginkgo/v2 v2.25.3
+	github.com/nats-io/nats.go v1.47.0
+	github.com/onsi/ginkgo/v2 v2.26.0
 	github.com/onsi/gomega v1.38.2
 	github.com/pkg/errors v0.9.1
 	github.com/prometheus/client_golang v1.23.2
@@ -23,20 +23,20 @@ require (
 	github.com/spf13/pflag v1.0.10
 	github.com/spf13/viper v1.21.0
 	github.com/testcontainers/testcontainers-go v0.39.0
-	go.etcd.io/etcd/api/v3 v3.6.4
-	go.etcd.io/etcd/client/v3 v3.6.4
+	go.etcd.io/etcd/api/v3 v3.6.5
+	go.etcd.io/etcd/client/v3 v3.6.5
 	go.uber.org/automaxprocs v1.6.0
 	gomodules.xyz/jsonpatch/v2 v2.5.0
-	k8s.io/api v0.34.0
-	k8s.io/apimachinery v0.34.0
-	k8s.io/apiserver v0.34.0
-	k8s.io/client-go v0.34.0
+	k8s.io/api v0.34.1
+	k8s.io/apimachinery v0.34.1
+	k8s.io/apiserver v0.34.1
+	k8s.io/client-go v0.34.1
 	k8s.io/cluster-bootstrap v0.0.0
 	k8s.io/klog/v2 v2.130.1
 	k8s.io/kubelet v0.0.0
 	k8s.io/kubernetes v1.34.1
 	k8s.io/utils v0.0.0-20250604170112-4c0f3b243397
-	sigs.k8s.io/controller-runtime v0.22.1
+	sigs.k8s.io/controller-runtime v0.22.3
 )
 
 require (
@@ -146,7 +146,7 @@ require (
 	github.com/x448/float16 v0.8.4 // indirect
 	github.com/xlab/treeprint v1.2.0 // indirect
 	github.com/yusufpapurcu/wmi v1.2.4 // indirect
-	go.etcd.io/etcd/client/pkg/v3 v3.6.4 // indirect
+	go.etcd.io/etcd/client/pkg/v3 v3.6.5 // indirect
 	go.opentelemetry.io/auto/sdk v1.1.0 // indirect
 	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.60.0 // indirect
 	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.58.0 // indirect
@@ -163,6 +163,7 @@ require (
 	go.yaml.in/yaml/v3 v3.0.4 // indirect
 	golang.org/x/crypto v0.41.0 // indirect
 	golang.org/x/exp v0.0.0-20240719175910-8a7402abbf56 // indirect
+	golang.org/x/mod v0.27.0 // indirect
 	golang.org/x/net v0.43.0 // indirect
 	golang.org/x/oauth2 v0.30.0 // indirect
 	golang.org/x/sync v0.16.0 // indirect
@@ -180,10 +181,10 @@ require (
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	gopkg.in/natefinch/lumberjack.v2 v2.2.1 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
-	k8s.io/apiextensions-apiserver v0.34.0 // indirect
+	k8s.io/apiextensions-apiserver v0.34.1 // indirect
 	k8s.io/cli-runtime v0.0.0 // indirect
 	k8s.io/cloud-provider v0.0.0 // indirect
-	k8s.io/component-base v0.34.0 // indirect
+	k8s.io/component-base v0.34.1 // indirect
 	k8s.io/component-helpers v0.34.0 // indirect
 	k8s.io/controller-manager v0.34.0 // indirect
 	k8s.io/cri-api v0.34.0 // indirect

go.sum

@@ -58,8 +58,8 @@ github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/distribution/reference v0.6.0 h1:0IXCQ5g4/QMHHkarYzh5l+u8T3t73zM5QvfrDyIgxBk=
 github.com/distribution/reference v0.6.0/go.mod h1:BbU0aIcezP1/5jX/8MP0YiH4SdvB5Y4f/wlDRiLyi3E=
-github.com/docker/docker v28.4.0+incompatible h1:KVC7bz5zJY/4AZe/78BIvCnPsLaC9T/zh72xnlrTTOk=
-github.com/docker/docker v28.4.0+incompatible/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
+github.com/docker/docker v28.5.1+incompatible h1:Bm8DchhSD2J6PsFzxC35TZo4TLGR2PdW/E69rU45NhM=
+github.com/docker/docker v28.5.1+incompatible/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
 github.com/docker/go-connections v0.6.0 h1:LlMG9azAe1TqfR7sO+NJttz1gy6KO7VJBh+pMmjSD94=
 github.com/docker/go-connections v0.6.0/go.mod h1:AahvXYshr6JgfUJGdDCs2b5EZG/vmaMAntpSFH5BFKE=
 github.com/docker/go-units v0.5.0 h1:69rxXcBk27SvSaaxTtLh/8llcHD8vYHT7WSdRZ/jvr4=
@@ -83,6 +83,12 @@ github.com/fsnotify/fsnotify v1.9.0 h1:2Ml+OJNzbYCTzsxtv8vKSFD9PbJjmhYF14k/jKC7S
 github.com/fsnotify/fsnotify v1.9.0/go.mod h1:8jBTzvmWwFyi3Pb8djgCCO5IBqzKJ/Jwo8TRcHyHii0=
 github.com/fxamacker/cbor/v2 v2.9.0 h1:NpKPmjDBgUfBms6tr6JZkTHtfFGcMKsw3eGcmD/sapM=
 github.com/fxamacker/cbor/v2 v2.9.0/go.mod h1:vM4b+DJCtHn+zz7h3FFp/hDAI9WNWCsZj23V5ytsSxQ=
+github.com/gkampitakis/ciinfo v0.3.2 h1:JcuOPk8ZU7nZQjdUhctuhQofk7BGHuIy0c9Ez8BNhXs=
+github.com/gkampitakis/ciinfo v0.3.2/go.mod h1:1NIwaOcFChN4fa/B0hEBdAb6npDlFL8Bwx4dfRLRqAo=
+github.com/gkampitakis/go-diff v1.3.2 h1:Qyn0J9XJSDTgnsgHRdz9Zp24RaJeKMUHg2+PDZZdC4M=
+github.com/gkampitakis/go-diff v1.3.2/go.mod h1:LLgOrpqleQe26cte8s36HTWcTmMEur6OPYerdAAS9tk=
+github.com/gkampitakis/go-snaps v0.5.14 h1:3fAqdB6BCPKHDMHAKRwtPUwYexKtGrNuw8HX/T/4neo=
+github.com/gkampitakis/go-snaps v0.5.14/go.mod h1:HNpx/9GoKisdhw9AFOBT1N7DBs9DiHo/hGheFGBZ+mc=
 github.com/go-errors/errors v1.4.2 h1:J6MZopCL4uSllY1OfXM374weqZFFItUbrImctkmUxIA=
 github.com/go-errors/errors v1.4.2/go.mod h1:sIVyrIiJhuEF+Pj9Ebtd6P/rEYROXFi3BopGUQ5a5Og=
 github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
@@ -112,6 +118,8 @@ github.com/go-task/slim-sprig/v3 v3.0.0 h1:sUs3vkvUymDpBKi3qH1YSqBQk9+9D/8M2mN1v
 github.com/go-task/slim-sprig/v3 v3.0.0/go.mod h1:W848ghGpv3Qj3dhTPRyJypKRiqCdHZiAzKg9hl15HA8=
 github.com/go-viper/mapstructure/v2 v2.4.0 h1:EBsztssimR/CONLSZZ04E8qAkxNYq4Qp9LvH92wZUgs=
 github.com/go-viper/mapstructure/v2 v2.4.0/go.mod h1:oJDH3BJKyqBA2TXFhDsKDGDTlndYOZ6rGS0BRZIxGhM=
+github.com/goccy/go-yaml v1.18.0 h1:8W7wMFS12Pcas7KU+VVkaiCng+kG8QiFeFwzFb+rwuw=
+github.com/goccy/go-yaml v1.18.0/go.mod h1:XBurs7gK8ATbW4ZPGKgcbrY1Br56PdM69F7LkFRi1kA=
 github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
 github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
 github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
@@ -158,6 +166,8 @@ github.com/jonboulle/clockwork v0.5.0 h1:Hyh9A8u51kptdkR+cqRpT1EebBwTn1oK9YfGYbd
 github.com/jonboulle/clockwork v0.5.0/go.mod h1:3mZlmanh0g2NDKO5TWZVJAfofYk64M7XN3SzBPjZF60=
 github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
 github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
+github.com/joshdk/go-junit v1.0.0 h1:S86cUKIdwBHWwA6xCmFlf3RTLfVXYQfvanM5Uh+K6GE=
+github.com/joshdk/go-junit v1.0.0/go.mod h1:TiiV0PqkaNfFXjEiyjWM3XXrhVyCa1K4Zfga6W52ung=
 github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
 github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
 github.com/juju/clock v0.0.0-20190205081909-9c5c9712527c h1:3UvYABOQRhJAApj9MdCN+Ydv841ETSoy6xLzdmmr/9A=
@@ -205,6 +215,10 @@ github.com/magiconair/properties v1.8.10 h1:s31yESBquKXCV9a/ScB3ESkOjUYYv+X0rg8S
 github.com/magiconair/properties v1.8.10/go.mod h1:Dhd985XPs7jluiymwWYZ0G4Z61jb3vdS329zhj2hYo0=
 github.com/mailru/easyjson v0.7.7 h1:UGYAvKxe3sBsEDzO8ZeWOSlIQfWFlxbzLZe7hwFURr0=
 github.com/mailru/easyjson v0.7.7/go.mod h1:xzfreul335JAWq5oZzymOObrkdz5UnU4kGfJJLY9Nlc=
+github.com/maruel/natural v1.1.1 h1:Hja7XhhmvEFhcByqDoHz9QZbkWey+COd9xWfCfn1ioo=
+github.com/maruel/natural v1.1.1/go.mod h1:v+Rfd79xlw1AgVBjbO0BEQmptqb5HvL/k9GRHB7ZKEg=
+github.com/mfridman/tparse v0.18.0 h1:wh6dzOKaIwkUGyKgOntDW4liXSo37qg5AXbIhkMV3vE=
+github.com/mfridman/tparse v0.18.0/go.mod h1:gEvqZTuCgEhPbYk/2lS3Kcxg1GmTxxU7kTC8DvP0i/A=
 github.com/moby/docker-image-spec v1.3.1 h1:jMKff3w6PgbfSa69GfNg+zN/XLhfXJGnEx3Nl2EsFP0=
 github.com/moby/docker-image-spec v1.3.1/go.mod h1:eKmb5VW8vQEh/BAr2yvVNvuiJuY6UIocYsFu/DxxRpo=
 github.com/moby/go-archive v0.1.0 h1:Kk/5rdW/g+H8NHdJW2gsXyZ7UnzvJNOy6VKJqueWdcQ=
@@ -233,8 +247,8 @@ github.com/morikuni/aec v1.0.0 h1:nP9CBfwrvYnBRgY6qfDQkygYDmYwOilePFkwzv4dU8A=
 github.com/morikuni/aec v1.0.0/go.mod h1:BbKIizmSmc5MMPqRYbxO4ZU0S0+P200+tUnFx7PXmsc=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
-github.com/nats-io/nats.go v1.45.0 h1:/wGPbnYXDM0pLKFjZTX+2JOw9TQPoIgTFrUaH97giwA=
-github.com/nats-io/nats.go v1.45.0/go.mod h1:iRWIPokVIFbVijxuMQq4y9ttaBTMe0SFdlZfMDd+33g=
+github.com/nats-io/nats.go v1.47.0 h1:YQdADw6J/UfGUd2Oy6tn4Hq6YHxCaJrVKayxxFqYrgM=
+github.com/nats-io/nats.go v1.47.0/go.mod h1:iRWIPokVIFbVijxuMQq4y9ttaBTMe0SFdlZfMDd+33g=
 github.com/nats-io/nkeys v0.4.11 h1:q44qGV008kYd9W1b1nEBkNzvnWxtRSQ7A8BoqRrcfa0=
 github.com/nats-io/nkeys v0.4.11/go.mod h1:szDimtgmfOi9n25JpfIdGw12tZFYXqhGxjhVxsatHVE=
 github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
@@ -243,8 +257,8 @@ github.com/nxadm/tail v1.4.4 h1:DQuhQpB1tVlglWS2hLQ5OV6B5r8aGxSrPc5Qo6uTN78=
 github.com/nxadm/tail v1.4.4/go.mod h1:kenIhsEOeOJmVchQTgglprH7qJGnHDVpk1VPCcaMI8A=
 github.com/onsi/ginkgo v1.14.2 h1:8mVmC9kjFFmA8H4pKMUhcblgifdkOIXPvbhN1T36q1M=
 github.com/onsi/ginkgo v1.14.2/go.mod h1:iSB4RoI2tjJc9BBv4NKIKWKya62Rps+oPG/Lv9klQyY=
-github.com/onsi/ginkgo/v2 v2.25.3 h1:Ty8+Yi/ayDAGtk4XxmmfUy4GabvM+MegeB4cDLRi6nw=
-github.com/onsi/ginkgo/v2 v2.25.3/go.mod h1:43uiyQC4Ed2tkOzLsEYm7hnrb7UJTWHYNsuy3bG/snE=
+github.com/onsi/ginkgo/v2 v2.26.0 h1:1J4Wut1IlYZNEAWIV3ALrT9NfiaGW2cDCJQSFQMs/gE=
+github.com/onsi/ginkgo/v2 v2.26.0/go.mod h1:qhEywmzWTBUY88kfO0BRvX4py7scov9yR+Az2oavUzw=
 github.com/onsi/gomega v1.38.2 h1:eZCjf2xjZAqe+LeWvKb5weQ+NcPwX84kqJ0cZNxok2A=
 github.com/onsi/gomega v1.38.2/go.mod h1:W2MJcYxRGV63b418Ai34Ud0hEdTVXq9NW9+Sx6uXf3k=
 github.com/opencontainers/go-digest v1.0.0 h1:apOUWs51W5PlhuyGyz9FCeeBIOUDA/6nW8Oi/yOhh5U=
@@ -272,8 +286,8 @@ github.com/prometheus/common v0.66.1 h1:h5E0h5/Y8niHc5DlaLlWLArTQI7tMrsfQjHV+d9Z
 github.com/prometheus/common v0.66.1/go.mod h1:gcaUsgf3KfRSwHY4dIMXLPV0K/Wg1oZ8+SbZk/HH/dA=
 github.com/prometheus/procfs v0.16.1 h1:hZ15bTNuirocR6u0JZ6BAHHmwS1p8B4P6MRqxtzMyRg=
 github.com/prometheus/procfs v0.16.1/go.mod h1:teAbpZRB1iIAJYREa1LsoWUXykVXA1KlTmWl8x/U+Is=
-github.com/rogpeppe/go-internal v1.13.1 h1:KvO1DLK/DRN07sQ1LQKScxyZJuNnedQ5/wKSR38lUII=
-github.com/rogpeppe/go-internal v1.13.1/go.mod h1:uMEvuHeurkdAXX61udpOXGD/AzZDWNMNyH2VO9fmH0o=
+github.com/rogpeppe/go-internal v1.14.1 h1:UQB4HGPB6osV0SQTLymcB4TgvyWu6ZyliaW0tI/otEQ=
+github.com/rogpeppe/go-internal v1.14.1/go.mod h1:MaRKkUm5W0goXpeCfT7UZI6fk/L7L7so1lCWt35ZSgc=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/sagikazarmark/locafero v0.11.0 h1:1iurJgmM9G3PA/I+wWYIOw/5SyBtxapeHDcg+AAIFXc=
 github.com/sagikazarmark/locafero v0.11.0/go.mod h1:nVIGvgyzw595SUSUE6tvCp3YYTeHs15MvlmU87WwIik=
@@ -318,6 +332,14 @@ github.com/subosito/gotenv v1.6.0 h1:9NlTDc1FTs4qu0DDq7AEtTPNw6SVm7uBMsUCUjABIf8
 github.com/subosito/gotenv v1.6.0/go.mod h1:Dk4QP5c2W3ibzajGcXpNraDfq2IrhjMIvMSWPKKo0FU=
 github.com/testcontainers/testcontainers-go v0.39.0 h1:uCUJ5tA+fcxbFAB0uP3pIK3EJ2IjjDUHFSZ1H1UxAts=
 github.com/testcontainers/testcontainers-go v0.39.0/go.mod h1:qmHpkG7H5uPf/EvOORKvS6EuDkBUPE3zpVGaH9NL7f8=
+github.com/tidwall/gjson v1.18.0 h1:FIDeeyB800efLX89e5a8Y0BNH+LOngJyGrIWxG2FKQY=
+github.com/tidwall/gjson v1.18.0/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
+github.com/tidwall/match v1.1.1 h1:+Ho715JplO36QYgwN9PGYNhgZvoUSc9X2c80KVTi+GA=
+github.com/tidwall/match v1.1.1/go.mod h1:eRSPERbgtNPcGhD8UCthc6PmLEQXEWd3PRB5JTxsfmM=
+github.com/tidwall/pretty v1.2.1 h1:qjsOFOWWQl+N3RsoF5/ssm1pHmJJwhjlSbZ51I6wMl4=
+github.com/tidwall/pretty v1.2.1/go.mod h1:ITEVvHYasfjBbM0u2Pg8T2nJnzm8xPwvNhhsoaGGjNU=
+github.com/tidwall/sjson v1.2.5 h1:kLy8mja+1c9jlljvWTlSazM7cKDRfJuR/bOJhcY5NcY=
+github.com/tidwall/sjson v1.2.5/go.mod h1:Fvgq9kS/6ociJEDnK0Fk1cpYF4FIW6ZF7LAe+6jwd28=
 github.com/tklauser/go-sysconf v0.3.12 h1:0QaGUFOdQaIVdPgfITYzaTegZvdCjmYO52cSFAEVmqU=
 github.com/tklauser/go-sysconf v0.3.12/go.mod h1:Ho14jnntGE1fpdOqQEEaiKRpvIavV0hSfmBq8nJbHYI=
 github.com/tklauser/numcpus v0.6.1 h1:ng9scYS7az0Bk4OZLvrNXNSAO2Pxr1XXRAPyjhIx+Fk=
@@ -349,12 +371,12 @@ github.com/yusufpapurcu/wmi v1.2.4 h1:zFUKzehAFReQwLys1b/iSMl+JQGSCSjtVqQn9bBrPo
 github.com/yusufpapurcu/wmi v1.2.4/go.mod h1:SBZ9tNy3G9/m5Oi98Zks0QjeHVDvuK0qfxQmPyzfmi0=
 go.etcd.io/bbolt v1.4.2 h1:IrUHp260R8c+zYx/Tm8QZr04CX+qWS5PGfPdevhdm1I=
 go.etcd.io/bbolt v1.4.2/go.mod h1:Is8rSHO/b4f3XigBC0lL0+4FwAQv3HXEEIgFMuKHceM=
-go.etcd.io/etcd/api/v3 v3.6.4 h1:7F6N7toCKcV72QmoUKa23yYLiiljMrT4xCeBL9BmXdo=
-go.etcd.io/etcd/api/v3 v3.6.4/go.mod h1:eFhhvfR8Px1P6SEuLT600v+vrhdDTdcfMzmnxVXXSbk=
-go.etcd.io/etcd/client/pkg/v3 v3.6.4 h1:9HBYrjppeOfFjBjaMTRxT3R7xT0GLK8EJMVC4xg6ok0=
-go.etcd.io/etcd/client/pkg/v3 v3.6.4/go.mod h1:sbdzr2cl3HzVmxNw//PH7aLGVtY4QySjQFuaCgcRFAI=
-go.etcd.io/etcd/client/v3 v3.6.4 h1:YOMrCfMhRzY8NgtzUsHl8hC2EBSnuqbR3dh84Uryl7A=
-go.etcd.io/etcd/client/v3 v3.6.4/go.mod h1:jaNNHCyg2FdALyKWnd7hxZXZxZANb0+KGY+YQaEMISo=
+go.etcd.io/etcd/api/v3 v3.6.5 h1:pMMc42276sgR1j1raO/Qv3QI9Af/AuyQUW6CBAWuntA=
+go.etcd.io/etcd/api/v3 v3.6.5/go.mod h1:ob0/oWA/UQQlT1BmaEkWQzI0sJ1M0Et0mMpaABxguOQ=
+go.etcd.io/etcd/client/pkg/v3 v3.6.5 h1:Duz9fAzIZFhYWgRjp/FgNq2gO1jId9Yae/rLn3RrBP8=
+go.etcd.io/etcd/client/pkg/v3 v3.6.5/go.mod h1:8Wx3eGRPiy0qOFMZT/hfvdos+DjEaPxdIDiCDUv/FQk=
+go.etcd.io/etcd/client/v3 v3.6.5 h1:yRwZNFBx/35VKHTcLDeO7XVLbCBFbPi+XV4OC3QJf2U=
+go.etcd.io/etcd/client/v3 v3.6.5/go.mod h1:ZqwG/7TAFZ0BJ0jXRPoJjKQJtbFo/9NIY8uoFFKcCyo=
 go.etcd.io/etcd/pkg/v3 v3.6.4 h1:fy8bmXIec1Q35/jRZ0KOes8vuFxbvdN0aAFqmEfJZWA=
 go.etcd.io/etcd/pkg/v3 v3.6.4/go.mod h1:kKcYWP8gHuBRcteyv6MXWSN0+bVMnfgqiHueIZnKMtE=
 go.etcd.io/etcd/server/v3 v3.6.4 h1:LsCA7CzjVt+8WGrdsnh6RhC0XqCsLkBly3ve5rTxMAU=
@@ -407,6 +429,8 @@ golang.org/x/exp v0.0.0-20240719175910-8a7402abbf56/go.mod h1:M4RDyNAINzryxdtnbR
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/mod v0.27.0 h1:kb+q2PyFnEADO2IEF935ehFUXlWiNjJWtRNgBLSfbxQ=
+golang.org/x/mod v0.27.0/go.mod h1:rWI627Fq0DEoudcK+MBkNkCe0EetEaDSwJJkCcjpazc=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
@@ -535,8 +559,8 @@ mellium.im/sasl v0.3.1 h1:wE0LW6g7U83vhvxjC1IY8DnXM+EU095yeo8XClvCdfo=
 mellium.im/sasl v0.3.1/go.mod h1:xm59PUYpZHhgQ9ZqoJ5QaCqzWMi8IeS49dhp6plPCzw=
 sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.31.2 h1:jpcvIRr3GLoUoEKRkHKSmGjxb6lWwrBlJsXc+eUYQHM=
 sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.31.2/go.mod h1:Ve9uj1L+deCXFrPOk1LpFXqTg7LCFzFso6PA48q/XZw=
-sigs.k8s.io/controller-runtime v0.22.1 h1:Ah1T7I+0A7ize291nJZdS1CabF/lB4E++WizgV24Eqg=
-sigs.k8s.io/controller-runtime v0.22.1/go.mod h1:FwiwRjkRPbiN+zp2QRp7wlTCzbUXxZ/D4OzuQUDwBHY=
+sigs.k8s.io/controller-runtime v0.22.3 h1:I7mfqz/a/WdmDCEnXmSPm8/b/yRTy6JsKKENTijTq8Y=
+sigs.k8s.io/controller-runtime v0.22.3/go.mod h1:+QX1XUpTXN4mLoblf4tqr5CQcyHPAki2HLXqQMY6vh8=
 sigs.k8s.io/json v0.0.0-20241014173422-cfa47c3a1cc8 h1:gBQPwqORJ8d8/YNZWEjoZs7npUVDpVXUUOFfW6CgAqE=
 sigs.k8s.io/json v0.0.0-20241014173422-cfa47c3a1cc8/go.mod h1:mdzfpAEoE6DHQEN0uh9ZbOCuHbLK5wOm7dK4ctXE9Tg=
 sigs.k8s.io/kustomize/api v0.20.1 h1:iWP1Ydh3/lmldBnH/S5RXgT98vWYMaTUL1ADcr+Sv7I=

internal/resources/api_server_certificate.go

@@ -117,6 +117,7 @@ func (r *APIServerCertificate) mutate(ctx context.Context, tenantControlPlane *k
 		}
 
 		r.resource.SetLabels(utilities.MergeMaps(
+			r.resource.GetLabels(),
 			utilities.KamajiLabels(tenantControlPlane.GetName(), r.GetName()),
 			map[string]string{
 				constants.ControllerLabelResource: utilities.CertificateX509Label,

internal/resources/api_server_kubelet_client_certificate.go

@@ -104,6 +104,7 @@ func (r *APIServerKubeletClientCertificate) mutate(ctx context.Context, tenantCo
 		}
 
 		r.resource.SetLabels(utilities.MergeMaps(
+			r.resource.GetLabels(),
 			utilities.KamajiLabels(tenantControlPlane.GetName(), r.GetName()),
 			map[string]string{
 				constants.ControllerLabelResource: utilities.CertificateX509Label,

internal/resources/ca_certificate.go

@@ -153,7 +153,7 @@ func (r *CACertificate) mutate(ctx context.Context, tenantControlPlane *kamajiv1
 			corev1.TLSPrivateKeyKey: ca.PrivateKey,
 		}
 
-		r.resource.SetLabels(utilities.KamajiLabels(tenantControlPlane.GetName(), r.GetName()))
+		r.resource.SetLabels(utilities.MergeMaps(r.resource.GetLabels(), utilities.KamajiLabels(tenantControlPlane.GetName(), r.GetName())))
 
 		utilities.SetObjectChecksum(r.resource, r.resource.Data)
 

internal/resources/datastore/datastore_certificate.go

@@ -106,6 +106,7 @@ func (r *Certificate) mutate(ctx context.Context, tenantControlPlane *kamajiv1al
 			r.resource.Data["ca.crt"] = ca
 
 			r.resource.SetLabels(utilities.MergeMaps(
+				r.resource.GetLabels(),
 				utilities.KamajiLabels(tenantControlPlane.GetName(), r.GetName()),
 				map[string]string{
 					constants.ControllerLabelResource: utilities.CertificateX509Label,

internal/resources/datastore/datastore_storage_config.go

@@ -190,7 +190,7 @@ func (r *Config) mutate(ctx context.Context, tenantControlPlane *kamajiv1alpha1.
 
 		utilities.SetObjectChecksum(r.resource, r.resource.Data)
 
-		r.resource.SetLabels(utilities.KamajiLabels(tenantControlPlane.GetName(), r.GetName()))
+		r.resource.SetLabels(utilities.MergeMaps(r.resource.GetLabels(), utilities.KamajiLabels(tenantControlPlane.GetName(), r.GetName())))
 
 		return ctrl.SetControllerReference(tenantControlPlane, r.resource, r.Client.Scheme())
 	}

internal/resources/front-proxy-client-certificate.go

@@ -104,6 +104,7 @@ func (r *FrontProxyClientCertificate) mutate(ctx context.Context, tenantControlP
 		}
 
 		r.resource.SetLabels(utilities.MergeMaps(
+			r.resource.GetLabels(),
 			utilities.KamajiLabels(tenantControlPlane.GetName(), r.GetName()),
 			map[string]string{
 				constants.ControllerLabelResource: utilities.CertificateX509Label,

internal/resources/front_proxy_ca_certificate.go

@@ -126,7 +126,7 @@ func (r *FrontProxyCACertificate) mutate(ctx context.Context, tenantControlPlane
 			kubeadmconstants.FrontProxyCAKeyName:  ca.PrivateKey,
 		}
 
-		r.resource.SetLabels(utilities.KamajiLabels(tenantControlPlane.GetName(), r.GetName()))
+		r.resource.SetLabels(utilities.MergeMaps(r.resource.GetLabels(), utilities.KamajiLabels(tenantControlPlane.GetName(), r.GetName())))
 
 		if isRotationRequested {
 			utilities.SetLastRotationTimestamp(r.resource)

internal/resources/k8s_deployment_resource.go

@@ -36,7 +36,9 @@ func (r *KubernetesDeploymentResource) isStatusEqual(tenantControlPlane *kamajiv
 }
 
 func (r *KubernetesDeploymentResource) ShouldStatusBeUpdated(_ context.Context, tenantControlPlane *kamajiv1alpha1.TenantControlPlane) bool {
-	return !r.isStatusEqual(tenantControlPlane) || tenantControlPlane.Spec.Kubernetes.Version != tenantControlPlane.Status.Kubernetes.Version.Version
+	return !r.isStatusEqual(tenantControlPlane) ||
+		tenantControlPlane.Spec.Kubernetes.Version != tenantControlPlane.Status.Kubernetes.Version.Version ||
+		*r.computeStatus(tenantControlPlane) != ptr.Deref(tenantControlPlane.Status.Kubernetes.Version.Status, kamajiv1alpha1.VersionUnknown)
 }
 
 func (r *KubernetesDeploymentResource) ShouldCleanup(*kamajiv1alpha1.TenantControlPlane) bool {
@@ -78,19 +80,29 @@ func (r *KubernetesDeploymentResource) GetName() string {
 	return "deployment"
 }
 
-func (r *KubernetesDeploymentResource) UpdateTenantControlPlaneStatus(_ context.Context, tenantControlPlane *kamajiv1alpha1.TenantControlPlane) error {
+func (r *KubernetesDeploymentResource) computeStatus(tenantControlPlane *kamajiv1alpha1.TenantControlPlane) *kamajiv1alpha1.KubernetesVersionStatus {
 	switch {
 	case ptr.Deref(tenantControlPlane.Spec.ControlPlane.Deployment.Replicas, 2) == 0:
-		tenantControlPlane.Status.Kubernetes.Version.Status = &kamajiv1alpha1.VersionSleeping
-	case !r.isProgressingUpgrade():
-		tenantControlPlane.Status.Kubernetes.Version.Status = &kamajiv1alpha1.VersionReady
-		tenantControlPlane.Status.Kubernetes.Version.Version = tenantControlPlane.Spec.Kubernetes.Version
-	case r.isUpgrading(tenantControlPlane):
-		tenantControlPlane.Status.Kubernetes.Version.Status = &kamajiv1alpha1.VersionUpgrading
-	case r.isProvisioning(tenantControlPlane):
-		tenantControlPlane.Status.Kubernetes.Version.Status = &kamajiv1alpha1.VersionProvisioning
+		return &kamajiv1alpha1.VersionSleeping
 	case r.isNotReady():
-		tenantControlPlane.Status.Kubernetes.Version.Status = &kamajiv1alpha1.VersionNotReady
+		return &kamajiv1alpha1.VersionNotReady
+	case tenantControlPlane.Spec.WritePermissions.HasAnyLimitation():
+		return &kamajiv1alpha1.VersionWriteLimited
+	case !r.isProgressingUpgrade():
+		return &kamajiv1alpha1.VersionReady
+	case r.isUpgrading(tenantControlPlane):
+		return &kamajiv1alpha1.VersionUpgrading
+	case r.isProvisioning(tenantControlPlane):
+		return &kamajiv1alpha1.VersionProvisioning
+	default:
+		return &kamajiv1alpha1.VersionUnknown
+	}
+}
+
+func (r *KubernetesDeploymentResource) UpdateTenantControlPlaneStatus(_ context.Context, tenantControlPlane *kamajiv1alpha1.TenantControlPlane) error {
+	tenantControlPlane.Status.Kubernetes.Version.Status = r.computeStatus(tenantControlPlane)
+	if *tenantControlPlane.Status.Kubernetes.Version.Status == kamajiv1alpha1.VersionReady {
+		tenantControlPlane.Status.Kubernetes.Version.Version = tenantControlPlane.Spec.Kubernetes.Version
 	}
 
 	tenantControlPlane.Status.Kubernetes.Deployment = kamajiv1alpha1.KubernetesDeploymentStatus{

internal/resources/k8s_ingress_resource.go

@@ -151,7 +151,7 @@ func (r *KubernetesIngressResource) Define(_ context.Context, tenantControlPlane
 
 func (r *KubernetesIngressResource) mutate(tenantControlPlane *kamajiv1alpha1.TenantControlPlane) controllerutil.MutateFn {
 	return func() error {
-		labels := utilities.MergeMaps(utilities.KamajiLabels(tenantControlPlane.GetName(), r.GetName()), tenantControlPlane.Spec.ControlPlane.Ingress.AdditionalMetadata.Labels)
+		labels := utilities.MergeMaps(r.resource.GetLabels(), utilities.KamajiLabels(tenantControlPlane.GetName(), r.GetName()), tenantControlPlane.Spec.ControlPlane.Ingress.AdditionalMetadata.Labels)
 		r.resource.SetLabels(labels)
 
 		annotations := utilities.MergeMaps(r.resource.GetAnnotations(), tenantControlPlane.Spec.ControlPlane.Ingress.AdditionalMetadata.Annotations)

internal/resources/k8s_service_resource.go

@@ -83,7 +83,12 @@ func (r *KubernetesServiceResource) mutate(ctx context.Context, tenantControlPla
 	address, _ := tenantControlPlane.DeclaredControlPlaneAddress(ctx, r.Client)
 
 	return func() error {
-		labels := utilities.MergeMaps(utilities.KamajiLabels(tenantControlPlane.GetName(), r.GetName()), tenantControlPlane.Spec.ControlPlane.Service.AdditionalMetadata.Labels)
+		labels := utilities.MergeMaps(
+			r.resource.GetLabels(),
+			utilities.KamajiLabels(
+				tenantControlPlane.GetName(), r.GetName()),
+			tenantControlPlane.Spec.ControlPlane.Service.AdditionalMetadata.Labels,
+		)
 		r.resource.SetLabels(labels)
 
 		annotations := utilities.MergeMaps(r.resource.GetAnnotations(), tenantControlPlane.Spec.ControlPlane.Service.AdditionalMetadata.Annotations)

internal/resources/konnectivity/certificate_resource.go

@@ -5,6 +5,7 @@ package konnectivity
 
 import (
 	"context"
+	"crypto/x509"
 	"fmt"
 	"time"
 
@@ -102,6 +103,16 @@ func (r *CertificateResource) mutate(ctx context.Context, tenantControlPlane *ka
 	return func() error {
 		logger := log.FromContext(ctx, "resource", r.GetName())
 
+		// Retrieving the TenantControlPlane CA:
+		// this is required to trigger a new generation in case of Certificate Authority rotation.
+		namespacedName := k8stypes.NamespacedName{Namespace: tenantControlPlane.GetNamespace(), Name: tenantControlPlane.Status.Certificates.CA.SecretName}
+		secretCA := &corev1.Secret{}
+		if err := r.Client.Get(ctx, namespacedName, secretCA); err != nil {
+			logger.Error(err, "cannot retrieve the CA secret")
+
+			return err
+		}
+
 		r.resource.SetLabels(utilities.MergeMaps(
 			r.resource.GetLabels(),
 			utilities.KamajiLabels(tenantControlPlane.GetName(), r.GetName()),
@@ -119,23 +130,20 @@ func (r *CertificateResource) mutate(ctx context.Context, tenantControlPlane *ka
 		isRotationRequested := utilities.IsRotationRequested(r.resource)
 
 		if checksum := tenantControlPlane.Status.Addons.Konnectivity.Certificate.Checksum; !isRotationRequested && (len(checksum) > 0 && checksum == utilities.CalculateMapChecksum(r.resource.Data)) {
+			isCAValid, err := crypto.VerifyCertificate(r.resource.Data[corev1.TLSCertKey], secretCA.Data[kubeadmconstants.CACertName], x509.ExtKeyUsageServerAuth)
+			if err != nil {
+				logger.Info(fmt.Sprintf("certificate-authority verify failed: %s", err.Error()))
+			}
+
 			isValid, err := crypto.IsValidCertificateKeyPairBytes(r.resource.Data[corev1.TLSCertKey], r.resource.Data[corev1.TLSPrivateKeyKey], r.CertExpirationThreshold)
 			if err != nil {
 				logger.Info(fmt.Sprintf("%s certificate-private_key pair is not valid: %s", konnectivityCertAndKeyBaseName, err.Error()))
 			}
-			if isValid {
+			if isCAValid && isValid {
 				return nil
 			}
 		}
 
-		namespacedName := k8stypes.NamespacedName{Namespace: tenantControlPlane.GetNamespace(), Name: tenantControlPlane.Status.Certificates.CA.SecretName}
-		secretCA := &corev1.Secret{}
-		if err := r.Client.Get(ctx, namespacedName, secretCA); err != nil {
-			logger.Error(err, "cannot retrieve the CA secret")
-
-			return err
-		}
-
 		ca := kubeadm.CertificatePrivateKeyPair{
 			Name:        kubeadmconstants.CACertAndKeyBaseName,
 			Certificate: secretCA.Data[kubeadmconstants.CACertName],

internal/resources/kubeadm_config.go

@@ -96,7 +96,7 @@ func (r *KubeadmConfigResource) mutate(ctx context.Context, tenantControlPlane *
 			return err
 		}
 
-		r.resource.SetLabels(utilities.KamajiLabels(tenantControlPlane.GetName(), r.GetName()))
+		r.resource.SetLabels(utilities.MergeMaps(r.resource.GetLabels(), utilities.KamajiLabels(tenantControlPlane.GetName(), r.GetName())))
 
 		params := kubeadm.Parameters{
 			TenantControlPlaneAddress:       address,

internal/resources/kubeconfig.go

@@ -172,6 +172,7 @@ func (r *KubeconfigResource) mutate(ctx context.Context, tenantControlPlane *kam
 		}
 
 		r.resource.SetLabels(utilities.MergeMaps(
+			r.resource.GetLabels(),
 			utilities.KamajiLabels(tenantControlPlane.GetName(), r.GetName()),
 			map[string]string{
 				constants.ControllerLabelResource: utilities.CertificateKubeconfigLabel,

internal/resources/sa_certificate.go

@@ -122,7 +122,7 @@ func (r *SACertificate) mutate(ctx context.Context, tenantControlPlane *kamajiv1
 			kubeadmconstants.ServiceAccountPrivateKeyName: sa.PrivateKey,
 		}
 
-		r.resource.SetLabels(utilities.KamajiLabels(tenantControlPlane.GetName(), r.GetName()))
+		r.resource.SetLabels(utilities.MergeMaps(r.resource.GetLabels(), utilities.KamajiLabels(tenantControlPlane.GetName(), r.GetName())))
 
 		if isRotationRequested {
 			utilities.SetLastRotationTimestamp(r.resource)

internal/webhook/chainer.go

@@ -25,18 +25,21 @@ type handlersChainer struct {
 //nolint:gocognit
 func (h handlersChainer) Handler(object runtime.Object, routeHandlers ...handlers.Handler) admission.HandlerFunc {
 	return func(ctx context.Context, req admission.Request) admission.Response {
-		decodedObj, oldDecodedObj := object.DeepCopyObject(), object.DeepCopyObject()
+		var decodedObj, oldDecodedObj runtime.Object
+		if object != nil {
+			decodedObj, oldDecodedObj = object.DeepCopyObject(), object.DeepCopyObject()
 
-		switch req.Operation {
-		case admissionv1.Delete:
-			// When deleting the OldObject struct field contains the object being deleted:
-			// https://github.com/kubernetes/kubernetes/pull/76346
-			if err := h.decoder.DecodeRaw(req.OldObject, decodedObj); err != nil {
-				return admission.Errored(http.StatusInternalServerError, errors.Wrap(err, fmt.Sprintf("unable to decode deleted object into %T", object)))
-			}
-		default:
-			if err := h.decoder.Decode(req, decodedObj); err != nil {
-				return admission.Errored(http.StatusInternalServerError, errors.Wrap(err, fmt.Sprintf("unable to decode into %T", object)))
+			switch req.Operation {
+			case admissionv1.Delete:
+				// When deleting the OldObject struct field contains the object being deleted:
+				// https://github.com/kubernetes/kubernetes/pull/76346
+				if err := h.decoder.DecodeRaw(req.OldObject, decodedObj); err != nil {
+					return admission.Errored(http.StatusInternalServerError, errors.Wrap(err, fmt.Sprintf("unable to decode deleted object into %T", object)))
+				}
+			default:
+				if err := h.decoder.Decode(req, decodedObj); err != nil {
+					return admission.Errored(http.StatusInternalServerError, errors.Wrap(err, fmt.Sprintf("unable to decode into %T", object)))
+				}
 			}
 		}
 

internal/webhook/handlers/write_permission.go

@@ -0,0 +1,32 @@
+// Copyright 2022 Clastix Labs
+// SPDX-License-Identifier: Apache-2.0
+
+package handlers
+
+import (
+	"context"
+	"fmt"
+
+	"gomodules.xyz/jsonpatch/v2"
+	"k8s.io/apimachinery/pkg/runtime"
+	"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
+)
+
+type WritePermission struct{}
+
+func (f WritePermission) OnCreate(runtime.Object) AdmissionResponse {
+	return f.response
+}
+
+func (f WritePermission) OnDelete(runtime.Object) AdmissionResponse {
+	return f.response
+}
+
+func (f WritePermission) OnUpdate(runtime.Object, runtime.Object) AdmissionResponse {
+	return f.response
+}
+
+func (f WritePermission) response(context.Context, admission.Request) ([]jsonpatch.JsonPatchOperation, error) {
+	return nil, fmt.Errorf("the current Control Plane has limited write permissions, current changes are blocked: " +
+		"removing the webhook may lead to an inconsistent state upon its completion")
+}

internal/webhook/routes/tcp_freeze.go

@@ -4,7 +4,6 @@
 package routes
 
 import (
-	corev1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/runtime"
 )
 
@@ -15,5 +14,5 @@ func (t TenantControlPlaneMigrate) GetPath() string {
 }
 
 func (t TenantControlPlaneMigrate) GetObject() runtime.Object {
-	return &corev1.Namespace{}
+	return nil
 }

internal/webhook/routes/tcp_writepermission.go

@@ -0,0 +1,18 @@
+// Copyright 2022 Clastix Labs
+// SPDX-License-Identifier: Apache-2.0
+
+package routes
+
+import (
+	"k8s.io/apimachinery/pkg/runtime"
+)
+
+type TenantControlPlaneWritePermission struct{}
+
+func (t TenantControlPlaneWritePermission) GetPath() string {
+	return "/write-permission"
+}
+
+func (t TenantControlPlaneWritePermission) GetObject() runtime.Object {
+	return nil
+}

main.go

@@ -9,6 +9,7 @@ import (
 	"k8s.io/apimachinery/pkg/runtime"
 
 	"github.com/clastix/kamaji/cmd"
+	kubeconfig_generator "github.com/clastix/kamaji/cmd/kubeconfig-generator"
 	"github.com/clastix/kamaji/cmd/manager"
 	"github.com/clastix/kamaji/cmd/migrate"
 )
@@ -16,9 +17,10 @@ import (
 func main() {
 	scheme := runtime.NewScheme()
 
-	root, mgr, migrator := cmd.NewCmd(scheme), manager.NewCmd(scheme), migrate.NewCmd(scheme)
+	root, mgr, migrator, kubeconfigGenerator := cmd.NewCmd(scheme), manager.NewCmd(scheme), migrate.NewCmd(scheme), kubeconfig_generator.NewCmd(scheme)
 	root.AddCommand(mgr)
 	root.AddCommand(migrator)
+	root.AddCommand(kubeconfigGenerator)
 
 	if err := root.Execute(); err != nil {
 		os.Exit(1)