mirror of
https://github.com/projectcapsule/capsule.git
synced 2026-03-03 18:20:19 +00:00
102 lines
3.0 KiB
Go
102 lines
3.0 KiB
Go
// Copyright 2020-2021 Clastix Labs
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
|
|
package imagepullpolicy
|
|
|
|
import (
|
|
"context"
|
|
"net/http"
|
|
|
|
corev1 "k8s.io/api/core/v1"
|
|
"k8s.io/apimachinery/pkg/fields"
|
|
"k8s.io/client-go/tools/record"
|
|
"sigs.k8s.io/controller-runtime/pkg/client"
|
|
"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
|
|
|
|
"github.com/clastix/capsule/api/v1alpha1"
|
|
"github.com/clastix/capsule/api/v1alpha1/domain"
|
|
capsulewebhook "github.com/clastix/capsule/pkg/webhook"
|
|
)
|
|
|
|
// +kubebuilder:webhook:path=/validating-imagepullpolicy,mutating=false,sideEffects=None,admissionReviewVersions=v1,failurePolicy=fail,groups="",resources=pods,verbs=create,versions=v1,name=validating-image-pull-policy.capsule.clastix.io
|
|
|
|
type webhook struct {
|
|
handler capsulewebhook.Handler
|
|
}
|
|
|
|
func Webhook(handler capsulewebhook.Handler) capsulewebhook.Webhook {
|
|
return &webhook{handler: handler}
|
|
}
|
|
|
|
func (w *webhook) GetHandler() capsulewebhook.Handler {
|
|
return w.handler
|
|
}
|
|
|
|
func (w *webhook) GetName() string {
|
|
return "ImagePullPolicy"
|
|
}
|
|
|
|
func (w *webhook) GetPath() string {
|
|
return "/validating-imagepullpolicy"
|
|
}
|
|
|
|
type handler struct{}
|
|
|
|
func Handler() capsulewebhook.Handler {
|
|
return &handler{}
|
|
}
|
|
|
|
func (r *handler) OnCreate(c client.Client, decoder *admission.Decoder, recorder record.EventRecorder) capsulewebhook.Func {
|
|
return func(ctx context.Context, req admission.Request) admission.Response {
|
|
var pod = &corev1.Pod{}
|
|
|
|
if err := decoder.Decode(req, pod); err != nil {
|
|
return admission.Errored(http.StatusBadRequest, err)
|
|
}
|
|
|
|
var tntList = &v1alpha1.TenantList{}
|
|
|
|
if err := c.List(ctx, tntList, client.MatchingFieldsSelector{
|
|
Selector: fields.OneTermEqualSelector(".status.namespaces", pod.Namespace),
|
|
}); err != nil {
|
|
return admission.Errored(http.StatusBadRequest, err)
|
|
}
|
|
// the Pod is not running in a Namespace managed by a Tenant
|
|
if len(tntList.Items) == 0 {
|
|
return admission.Allowed("")
|
|
}
|
|
|
|
tnt := tntList.Items[0]
|
|
|
|
policy := domain.NewImagePullPolicy(&tnt)
|
|
// if Tenant doesn't enforce the pull policy, exit
|
|
if policy == nil {
|
|
return admission.Allowed("")
|
|
}
|
|
|
|
for _, container := range pod.Spec.Containers {
|
|
usedPullPolicy := string(container.ImagePullPolicy)
|
|
|
|
if !policy.IsPolicySupported(usedPullPolicy) {
|
|
recorder.Eventf(&tnt, corev1.EventTypeWarning, "ForbiddenPullPolicy", "Pod %s/%s pull policy %s is forbidden for the current Tenant", req.Namespace, req.Name, usedPullPolicy)
|
|
|
|
return admission.Denied(NewImagePullPolicyForbidden(usedPullPolicy, container.Name, policy.AllowedPullPolicies()).Error())
|
|
}
|
|
}
|
|
|
|
return admission.Allowed("")
|
|
}
|
|
}
|
|
|
|
func (r *handler) OnUpdate(client.Client, *admission.Decoder, record.EventRecorder) capsulewebhook.Func {
|
|
return func(ctx context.Context, req admission.Request) admission.Response {
|
|
return admission.Allowed("")
|
|
}
|
|
}
|
|
|
|
func (r *handler) OnDelete(client.Client, *admission.Decoder, record.EventRecorder) capsulewebhook.Func {
|
|
return func(ctx context.Context, req admission.Request) admission.Response {
|
|
return admission.Allowed("")
|
|
}
|
|
}
|