mirror of
https://github.com/projectcapsule/capsule.git
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115 lines
3.5 KiB
Go
115 lines
3.5 KiB
Go
// Copyright 2020-2021 Clastix Labs
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// SPDX-License-Identifier: Apache-2.0
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package namespace
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import (
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"context"
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corev1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/fields"
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"k8s.io/apimachinery/pkg/types"
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"k8s.io/client-go/tools/record"
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"sigs.k8s.io/controller-runtime/pkg/client"
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"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
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capsulev1beta1 "github.com/clastix/capsule/api/v1beta1"
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"github.com/clastix/capsule/pkg/configuration"
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capsulewebhook "github.com/clastix/capsule/pkg/webhook"
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"github.com/clastix/capsule/pkg/webhook/utils"
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)
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type freezedHandler struct {
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configuration configuration.Configuration
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}
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func FreezeHandler(configuration configuration.Configuration) capsulewebhook.Handler {
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return &freezedHandler{configuration: configuration}
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}
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func (r *freezedHandler) OnCreate(client client.Client, decoder *admission.Decoder, recorder record.EventRecorder) capsulewebhook.Func {
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return func(ctx context.Context, req admission.Request) *admission.Response {
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ns := &corev1.Namespace{}
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if err := decoder.Decode(req, ns); err != nil {
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return utils.ErroredResponse(err)
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}
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for _, objectRef := range ns.ObjectMeta.OwnerReferences {
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// retrieving the selected Tenant
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tnt := &capsulev1beta1.Tenant{}
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if err := client.Get(ctx, types.NamespacedName{Name: objectRef.Name}, tnt); err != nil {
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return utils.ErroredResponse(err)
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}
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if tnt.IsCordoned() {
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recorder.Eventf(tnt, corev1.EventTypeWarning, "TenantFreezed", "Namespace %s cannot be attached, the current Tenant is freezed", ns.GetName())
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response := admission.Denied("the selected Tenant is freezed")
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return &response
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}
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}
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// creating NS that is not bounded to any Tenant
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return nil
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}
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}
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func (r *freezedHandler) OnDelete(c client.Client, _ *admission.Decoder, recorder record.EventRecorder) capsulewebhook.Func {
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return func(ctx context.Context, req admission.Request) *admission.Response {
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tntList := &capsulev1beta1.TenantList{}
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if err := c.List(ctx, tntList, client.MatchingFieldsSelector{
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Selector: fields.OneTermEqualSelector(".status.namespaces", req.Name),
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}); err != nil {
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return utils.ErroredResponse(err)
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}
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if len(tntList.Items) == 0 {
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return nil
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}
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tnt := tntList.Items[0]
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if tnt.IsCordoned() && utils.IsCapsuleUser(ctx, req, c, r.configuration.UserGroups()) {
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recorder.Eventf(&tnt, corev1.EventTypeWarning, "TenantFreezed", "Namespace %s cannot be deleted, the current Tenant is freezed", req.Name)
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response := admission.Denied("the selected Tenant is freezed")
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return &response
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}
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return nil
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}
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}
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func (r *freezedHandler) OnUpdate(c client.Client, decoder *admission.Decoder, recorder record.EventRecorder) capsulewebhook.Func {
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return func(ctx context.Context, req admission.Request) *admission.Response {
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ns := &corev1.Namespace{}
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if err := decoder.Decode(req, ns); err != nil {
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return utils.ErroredResponse(err)
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}
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tntList := &capsulev1beta1.TenantList{}
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if err := c.List(ctx, tntList, client.MatchingFieldsSelector{
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Selector: fields.OneTermEqualSelector(".status.namespaces", ns.Name),
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}); err != nil {
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return utils.ErroredResponse(err)
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}
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if len(tntList.Items) == 0 {
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return nil
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}
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tnt := tntList.Items[0]
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if tnt.IsCordoned() && utils.IsCapsuleUser(ctx, req, c, r.configuration.UserGroups()) {
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recorder.Eventf(&tnt, corev1.EventTypeWarning, "TenantFreezed", "Namespace %s cannot be updated, the current Tenant is freezed", ns.GetName())
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response := admission.Denied("the selected Tenant is freezed")
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return &response
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}
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return nil
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}
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}
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