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https://github.com/projectcapsule/capsule.git
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5aed7a01d5
Adding also NamespaceSelector to specific webhooks in order to decrease the chance ov breaking other critical Namespaces in case of Capsule failures.
112 lines
3.2 KiB
Go
112 lines
3.2 KiB
Go
/*
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Copyright 2020 Clastix Labs.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package registry
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import (
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"context"
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"net/http"
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"regexp"
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v1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/fields"
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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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capsulev1alpha1 "github.com/clastix/capsule/api/v1alpha1"
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"github.com/clastix/capsule/api/v1alpha1/domain"
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capsulewebhook "github.com/clastix/capsule/pkg/webhook"
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)
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// +kubebuilder:webhook:path=/validating-v1-registry,mutating=false,failurePolicy=ignore,groups="",resources=pods,verbs=create,versions=v1,name=pod.capsule.clastix.io
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type webhook struct {
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handler capsulewebhook.Handler
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}
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func Webhook(handler capsulewebhook.Handler) capsulewebhook.Webhook {
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return &webhook{handler: handler}
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}
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func (w *webhook) GetName() string {
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return "registry"
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}
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func (w *webhook) GetPath() string {
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return "/validating-v1-registry"
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}
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func (w *webhook) GetHandler() capsulewebhook.Handler {
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return w.handler
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}
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type handler struct {
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}
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func Handler() capsulewebhook.Handler {
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return &handler{}
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}
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func (h *handler) OnCreate(c client.Client, decoder *admission.Decoder) capsulewebhook.Func {
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return func(ctx context.Context, req admission.Request) admission.Response {
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pod := &v1.Pod{}
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if err := decoder.Decode(req, pod); err != nil {
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return admission.Errored(http.StatusBadRequest, err)
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}
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tl := &capsulev1alpha1.TenantList{}
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if err := c.List(ctx, tl, client.MatchingFieldsSelector{
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Selector: fields.OneTermEqualSelector(".status.namespaces", pod.Namespace),
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}); err != nil {
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return admission.Errored(http.StatusBadRequest, err)
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}
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if len(tl.Items) == 0 {
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return admission.Allowed("")
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}
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tnt := tl.Items[0]
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if tnt.Spec.ContainerRegistries != nil {
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var valid, matched bool
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regex := regexp.MustCompile(tnt.Spec.ContainerRegistries.AllowedRegex)
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for _, container := range pod.Spec.Containers {
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r := domain.NewRegistry(container.Image)
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valid = tnt.Spec.ContainerRegistries.Allowed.IsStringInList(r.Registry())
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if len(tnt.Spec.ContainerRegistries.AllowedRegex) > 0 {
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matched = regex.MatchString(r.Registry())
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}
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if !valid && !matched {
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return admission.Errored(http.StatusBadRequest, NewContainerRegistryForbidden(container.Image, *tnt.Spec.ContainerRegistries))
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}
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}
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}
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return admission.Allowed("")
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}
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}
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func (h *handler) OnDelete(client client.Client, decoder *admission.Decoder) capsulewebhook.Func {
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return func(ctx context.Context, req admission.Request) admission.Response {
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return admission.Allowed("")
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}
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}
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func (h *handler) OnUpdate(client client.Client, decoder *admission.Decoder) capsulewebhook.Func {
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return func(ctx context.Context, req admission.Request) admission.Response {
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return admission.Allowed("")
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}
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}
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