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delete.go
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delete.go
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/*
* This file is part of the KubeVirt project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Copyright 2019 Red Hat, Inc.
*
*/
package apply
import (
"context"
"encoding/json"
"fmt"
"strings"
routev1 "github.com/openshift/api/route/v1"
secv1 "github.com/openshift/api/security/v1"
promv1 "github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring/v1"
admissionregistrationv1 "k8s.io/api/admissionregistration/v1"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
policyv1 "k8s.io/api/policy/v1"
rbacv1 "k8s.io/api/rbac/v1"
extv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
apiregv1 "k8s.io/kube-aggregator/pkg/apis/apiregistration/v1"
v1 "kubevirt.io/api/core/v1"
"kubevirt.io/client-go/kubecli"
"kubevirt.io/client-go/log"
"kubevirt.io/kubevirt/pkg/controller"
"kubevirt.io/kubevirt/pkg/virt-operator/resource/generate/install"
"kubevirt.io/kubevirt/pkg/virt-operator/util"
)
const (
castFailedFmt = "Cast failed! obj: %+v"
deleteFailedFmt = "Failed to delete %s: %v"
finalizerPath = "/metadata/finalizers"
)
func deleteDummyWebhookValidators(kv *v1.KubeVirt,
clientset kubecli.KubevirtClient,
stores util.Stores,
expectations *util.Expectations) error {
kvkey, err := controller.KeyFunc(kv)
if err != nil {
return err
}
gracePeriod := int64(0)
deleteOptions := metav1.DeleteOptions{
GracePeriodSeconds: &gracePeriod,
}
objects := stores.ValidationWebhookCache.List()
for _, obj := range objects {
if webhook, ok := obj.(*admissionregistrationv1.ValidatingWebhookConfiguration); ok {
if !strings.HasPrefix(webhook.Name, "virt-operator-tmp-webhook") {
continue
}
if webhook.DeletionTimestamp != nil {
continue
}
if key, err := controller.KeyFunc(webhook); err == nil {
expectations.ValidationWebhook.AddExpectedDeletion(kvkey, key)
err = clientset.AdmissionregistrationV1().ValidatingWebhookConfigurations().Delete(context.Background(), webhook.Name, deleteOptions)
if err != nil {
expectations.ValidationWebhook.DeletionObserved(kvkey, key)
return fmt.Errorf("unable to delete validation webhook: %v", err)
}
log.Log.V(2).Infof("Temporary blocking validation webhook %s deleted", webhook.Name)
}
}
}
return nil
}
func DeleteAll(kv *v1.KubeVirt,
stores util.Stores,
clientset kubecli.KubevirtClient,
aggregatorclient install.APIServiceInterface,
expectations *util.Expectations) error {
kvkey, err := controller.KeyFunc(kv)
if err != nil {
return err
}
gracePeriod := int64(0)
deleteOptions := metav1.DeleteOptions{
GracePeriodSeconds: &gracePeriod,
}
// first delete CRDs only
err = crdHandleDeletion(kvkey, stores, clientset, expectations)
if err != nil {
return err
}
if !util.IsStoreEmpty(stores.CrdCache) {
// wait until CRDs are gone
return nil
}
// delete daemonsets
objects := stores.DaemonSetCache.List()
for _, obj := range objects {
if ds, ok := obj.(*appsv1.DaemonSet); ok && ds.DeletionTimestamp == nil {
if key, err := controller.KeyFunc(ds); err == nil {
expectations.DaemonSet.AddExpectedDeletion(kvkey, key)
err := clientset.AppsV1().DaemonSets(ds.Namespace).Delete(context.Background(), ds.Name, deleteOptions)
if err != nil {
expectations.DaemonSet.DeletionObserved(kvkey, key)
log.Log.Errorf(deleteFailedFmt, ds.Name, err)
return err
}
}
} else if !ok {
log.Log.Errorf(castFailedFmt, obj)
return nil
}
}
// delete podDisruptionBudgets
objects = stores.PodDisruptionBudgetCache.List()
for _, obj := range objects {
if pdb, ok := obj.(*policyv1.PodDisruptionBudget); ok && pdb.DeletionTimestamp == nil {
if key, err := controller.KeyFunc(pdb); err == nil {
pdbClient := clientset.PolicyV1().PodDisruptionBudgets(pdb.Namespace)
expectations.PodDisruptionBudget.AddExpectedDeletion(kvkey, key)
err = pdbClient.Delete(context.Background(), pdb.Name, metav1.DeleteOptions{})
if err != nil {
expectations.PodDisruptionBudget.DeletionObserved(kvkey, key)
log.Log.Errorf(deleteFailedFmt, pdb.Name, err)
return err
}
}
} else if !ok {
log.Log.Errorf(castFailedFmt, obj)
return nil
}
}
// delete deployments
objects = stores.DeploymentCache.List()
for _, obj := range objects {
if depl, ok := obj.(*appsv1.Deployment); ok && depl.DeletionTimestamp == nil {
if key, err := controller.KeyFunc(depl); err == nil {
expectations.Deployment.AddExpectedDeletion(kvkey, key)
err = clientset.AppsV1().Deployments(depl.Namespace).Delete(context.Background(), depl.Name, deleteOptions)
if err != nil {
expectations.Deployment.DeletionObserved(kvkey, key)
log.Log.Errorf(deleteFailedFmt, depl.Name, err)
return err
}
}
} else if !ok {
log.Log.Errorf(castFailedFmt, obj)
return nil
}
}
// delete validatingwebhooks
objects = stores.ValidationWebhookCache.List()
for _, obj := range objects {
if webhookConfiguration, ok := obj.(*admissionregistrationv1.ValidatingWebhookConfiguration); ok && webhookConfiguration.DeletionTimestamp == nil {
if key, err := controller.KeyFunc(webhookConfiguration); err == nil {
expectations.ValidationWebhook.AddExpectedDeletion(kvkey, key)
err := clientset.AdmissionregistrationV1().ValidatingWebhookConfigurations().Delete(context.Background(), webhookConfiguration.Name, deleteOptions)
if err != nil {
expectations.ValidationWebhook.DeletionObserved(kvkey, key)
log.Log.Errorf("Failed to delete validatingwebhook %+v: %v", webhookConfiguration, err)
return err
}
}
} else if !ok {
log.Log.Errorf(castFailedFmt, obj)
return nil
}
}
// delete mutatingwebhooks
objects = stores.MutatingWebhookCache.List()
for _, obj := range objects {
if webhookConfiguration, ok := obj.(*admissionregistrationv1.MutatingWebhookConfiguration); ok && webhookConfiguration.DeletionTimestamp == nil {
if key, err := controller.KeyFunc(webhookConfiguration); err == nil {
expectations.MutatingWebhook.AddExpectedDeletion(kvkey, key)
err := clientset.AdmissionregistrationV1().MutatingWebhookConfigurations().Delete(context.Background(), webhookConfiguration.Name, deleteOptions)
if err != nil {
expectations.MutatingWebhook.DeletionObserved(kvkey, key)
log.Log.Errorf("Failed to delete mutatingwebhook %+v: %v", webhookConfiguration, err)
return err
}
}
} else if !ok {
log.Log.Errorf(castFailedFmt, obj)
return nil
}
}
// delete apiservices
objects = stores.APIServiceCache.List()
for _, obj := range objects {
if apiservice, ok := obj.(*apiregv1.APIService); ok && apiservice.DeletionTimestamp == nil {
if key, err := controller.KeyFunc(apiservice); err == nil {
expectations.APIService.AddExpectedDeletion(kvkey, key)
err := aggregatorclient.Delete(context.Background(), apiservice.Name, deleteOptions)
if err != nil {
expectations.APIService.DeletionObserved(kvkey, key)
log.Log.Errorf("Failed to delete apiservice %+v: %v", apiservice, err)
return err
}
}
} else if !ok {
log.Log.Errorf(castFailedFmt, obj)
return nil
}
}
// delete services
objects = stores.ServiceCache.List()
for _, obj := range objects {
if svc, ok := obj.(*corev1.Service); ok && svc.DeletionTimestamp == nil {
if key, err := controller.KeyFunc(svc); err == nil {
expectations.Service.AddExpectedDeletion(kvkey, key)
err := clientset.CoreV1().Services(svc.Namespace).Delete(context.Background(), svc.Name, deleteOptions)
if err != nil {
expectations.Service.DeletionObserved(kvkey, key)
log.Log.Errorf("Failed to delete service %+v: %v", svc, err)
return err
}
}
} else if !ok {
log.Log.Errorf(castFailedFmt, obj)
return nil
}
}
// delete serviceMonitor
prometheusClient := clientset.PrometheusClient()
objects = stores.ServiceMonitorCache.List()
for _, obj := range objects {
if serviceMonitor, ok := obj.(*promv1.ServiceMonitor); ok && serviceMonitor.DeletionTimestamp == nil {
if key, err := controller.KeyFunc(serviceMonitor); err == nil {
expectations.ServiceMonitor.AddExpectedDeletion(kvkey, key)
err := prometheusClient.MonitoringV1().ServiceMonitors(serviceMonitor.Namespace).Delete(context.Background(), serviceMonitor.Name, deleteOptions)
if err != nil {
expectations.ServiceMonitor.DeletionObserved(kvkey, key)
log.Log.Errorf("Failed to delete serviceMonitor %+v: %v", serviceMonitor, err)
return err
}
expectations.ServiceMonitor.DeletionObserved(kvkey, key)
}
} else if !ok {
log.Log.Errorf(castFailedFmt, obj)
return nil
}
}
// delete PrometheusRules
objects = stores.PrometheusRuleCache.List()
for _, obj := range objects {
if prometheusRule, ok := obj.(*promv1.PrometheusRule); ok && prometheusRule.DeletionTimestamp == nil {
if key, err := controller.KeyFunc(prometheusRule); err == nil {
expectations.PrometheusRule.AddExpectedDeletion(kvkey, key)
err := prometheusClient.MonitoringV1().PrometheusRules(prometheusRule.Namespace).Delete(context.Background(), prometheusRule.Name, deleteOptions)
if err != nil {
log.Log.Errorf("Failed to delete prometheusRule %+v: %v", prometheusRule, err)
expectations.PrometheusRule.DeletionObserved(kvkey, key)
return err
}
}
} else if !ok {
log.Log.Errorf(castFailedFmt, obj)
return nil
}
}
// delete RBAC
objects = stores.ClusterRoleBindingCache.List()
for _, obj := range objects {
if crb, ok := obj.(*rbacv1.ClusterRoleBinding); ok && crb.DeletionTimestamp == nil {
if key, err := controller.KeyFunc(crb); err == nil {
expectations.ClusterRoleBinding.AddExpectedDeletion(kvkey, key)
err := clientset.RbacV1().ClusterRoleBindings().Delete(context.Background(), crb.Name, deleteOptions)
if err != nil {
expectations.ClusterRoleBinding.DeletionObserved(kvkey, key)
log.Log.Errorf("Failed to delete crb %+v: %v", crb, err)
return err
}
}
} else if !ok {
log.Log.Errorf(castFailedFmt, obj)
return nil
}
}
objects = stores.ClusterRoleCache.List()
for _, obj := range objects {
if cr, ok := obj.(*rbacv1.ClusterRole); ok && cr.DeletionTimestamp == nil {
if key, err := controller.KeyFunc(cr); err == nil {
expectations.ClusterRole.AddExpectedDeletion(kvkey, key)
err := clientset.RbacV1().ClusterRoles().Delete(context.Background(), cr.Name, deleteOptions)
if err != nil {
expectations.ClusterRole.DeletionObserved(kvkey, key)
log.Log.Errorf("Failed to delete cr %+v: %v", cr, err)
return err
}
}
} else if !ok {
log.Log.Errorf(castFailedFmt, obj)
return nil
}
}
objects = stores.RoleBindingCache.List()
for _, obj := range objects {
if rb, ok := obj.(*rbacv1.RoleBinding); ok && rb.DeletionTimestamp == nil {
if key, err := controller.KeyFunc(rb); err == nil {
expectations.RoleBinding.AddExpectedDeletion(kvkey, key)
err := clientset.RbacV1().RoleBindings(kv.Namespace).Delete(context.Background(), rb.Name, deleteOptions)
if err != nil {
expectations.RoleBinding.DeletionObserved(kvkey, key)
log.Log.Errorf("Failed to delete rb %+v: %v", rb, err)
return err
}
}
} else if !ok {
log.Log.Errorf(castFailedFmt, obj)
return nil
}
}
objects = stores.RoleCache.List()
for _, obj := range objects {
if role, ok := obj.(*rbacv1.Role); ok && role.DeletionTimestamp == nil {
if key, err := controller.KeyFunc(role); err == nil {
expectations.Role.AddExpectedDeletion(kvkey, key)
err := clientset.RbacV1().Roles(kv.Namespace).Delete(context.Background(), role.Name, deleteOptions)
if err != nil {
expectations.Role.DeletionObserved(kvkey, key)
log.Log.Errorf("Failed to delete role %+v: %v", role, err)
return err
}
}
} else if !ok {
log.Log.Errorf(castFailedFmt, obj)
return nil
}
}
objects = stores.ServiceAccountCache.List()
for _, obj := range objects {
if sa, ok := obj.(*corev1.ServiceAccount); ok && sa.DeletionTimestamp == nil {
if key, err := controller.KeyFunc(sa); err == nil {
expectations.ServiceAccount.AddExpectedDeletion(kvkey, key)
err := clientset.CoreV1().ServiceAccounts(kv.Namespace).Delete(context.Background(), sa.Name, deleteOptions)
if err != nil {
expectations.ServiceAccount.DeletionObserved(kvkey, key)
log.Log.Errorf("Failed to delete serviceaccount %+v: %v", sa, err)
return err
}
}
} else if !ok {
log.Log.Errorf(castFailedFmt, obj)
return nil
}
}
objects = stores.SecretCache.List()
for _, obj := range objects {
if secret, ok := obj.(*corev1.Secret); ok && secret.DeletionTimestamp == nil {
if key, err := controller.KeyFunc(secret); err == nil {
expectations.Secrets.AddExpectedDeletion(kvkey, key)
err := clientset.CoreV1().Secrets(kv.Namespace).Delete(context.Background(), secret.Name, deleteOptions)
if err != nil {
expectations.Secrets.DeletionObserved(kvkey, key)
log.Log.Errorf("Failed to delete secret %+v: %v", secret, err)
return err
}
}
} else if !ok {
log.Log.Errorf(castFailedFmt, obj)
return nil
}
}
objects = stores.ConfigMapCache.List()
for _, obj := range objects {
if configMap, ok := obj.(*corev1.ConfigMap); ok && configMap.DeletionTimestamp == nil {
if key, err := controller.KeyFunc(configMap); err == nil {
expectations.ConfigMap.AddExpectedDeletion(kvkey, key)
err := clientset.CoreV1().ConfigMaps(kv.Namespace).Delete(context.Background(), configMap.Name, deleteOptions)
if err != nil {
expectations.ConfigMap.DeletionObserved(kvkey, key)
log.Log.Errorf("Failed to delete configMap %+v: %v", configMap, err)
return err
}
}
} else if !ok {
log.Log.Errorf(castFailedFmt, obj)
return nil
}
}
scc := clientset.SecClient()
objects = stores.SCCCache.List()
for _, obj := range objects {
if s, ok := obj.(*secv1.SecurityContextConstraints); ok && s.DeletionTimestamp == nil {
// informer watches all SCC objects, it cannot be changed because of kubevirt updates
if !util.IsManagedByOperator(s.GetLabels()) {
continue
}
if key, err := controller.KeyFunc(s); err == nil {
expectations.SCC.AddExpectedDeletion(kvkey, key)
err := scc.SecurityContextConstraints().Delete(context.Background(), s.Name, deleteOptions)
if err != nil {
expectations.SCC.DeletionObserved(kvkey, key)
log.Log.Errorf("Failed to delete SecurityContextConstraints %+v: %v", s, err)
return err
}
}
} else if !ok {
log.Log.Errorf(castFailedFmt, obj)
return nil
}
}
objects = stores.RouteCache.List()
for _, obj := range objects {
if route, ok := obj.(*routev1.Route); ok && route.DeletionTimestamp == nil {
if key, err := controller.KeyFunc(route); err == nil {
expectations.Route.AddExpectedDeletion(kvkey, key)
err := clientset.RouteClient().Routes(kv.Namespace).Delete(context.Background(), route.Name, deleteOptions)
if err != nil {
expectations.Route.DeletionObserved(kvkey, key)
log.Log.Errorf("Failed to delete route %+v: %v", route, err)
return err
}
}
} else if !ok {
log.Log.Errorf(castFailedFmt, obj)
return nil
}
}
err = deleteDummyWebhookValidators(kv, clientset, stores, expectations)
if err != nil {
return err
}
return nil
}
func crdInstanceDeletionCompleted(crd *extv1.CustomResourceDefinition) bool {
// Below is an example of what is being looked for here.
// The CRD will have this condition once a CRD which is being
// deleted has all instances removed related to this CRD.
//
// message: removed all instances
// reason: InstanceDeletionCompleted
// status: "False"
// type: Terminating
if crd.DeletionTimestamp == nil {
return false
}
for _, condition := range crd.Status.Conditions {
if condition.Type == extv1.Terminating &&
condition.Status == extv1.ConditionFalse &&
condition.Reason == "InstanceDeletionCompleted" {
return true
}
}
return false
}
func crdFilterNeedFinalizerAdded(crds []*extv1.CustomResourceDefinition) []*extv1.CustomResourceDefinition {
filtered := []*extv1.CustomResourceDefinition{}
for _, crd := range crds {
if crd.DeletionTimestamp == nil && !controller.HasFinalizer(crd, v1.VirtOperatorComponentFinalizer) {
filtered = append(filtered, crd)
}
}
return filtered
}
func crdFilterNeedDeletion(crds []*extv1.CustomResourceDefinition) []*extv1.CustomResourceDefinition {
filtered := []*extv1.CustomResourceDefinition{}
for _, crd := range crds {
if crd.DeletionTimestamp == nil {
filtered = append(filtered, crd)
}
}
return filtered
}
func crdFilterNeedFinalizerRemoved(crds []*extv1.CustomResourceDefinition) []*extv1.CustomResourceDefinition {
filtered := []*extv1.CustomResourceDefinition{}
for _, crd := range crds {
if !crdInstanceDeletionCompleted(crd) {
// All crds must have all crs removed before any CRD finalizer can be removed
return []*extv1.CustomResourceDefinition{}
} else if controller.HasFinalizer(crd, v1.VirtOperatorComponentFinalizer) {
filtered = append(filtered, crd)
}
}
return filtered
}
func crdHandleDeletion(kvkey string,
stores util.Stores,
clientset kubecli.KubevirtClient,
expectations *util.Expectations) error {
ext := clientset.ExtensionsClient()
objects := stores.CrdCache.List()
finalizerPath := "/metadata/finalizers"
crds := []*extv1.CustomResourceDefinition{}
for _, obj := range objects {
crd, ok := obj.(*extv1.CustomResourceDefinition)
if !ok {
log.Log.Errorf(castFailedFmt, obj)
return nil
}
crds = append(crds, crd)
}
needFinalizerAdded := crdFilterNeedFinalizerAdded(crds)
needDeletion := crdFilterNeedDeletion(crds)
needFinalizerRemoved := crdFilterNeedFinalizerRemoved(crds)
for _, crd := range needFinalizerAdded {
crdCopy := crd.DeepCopy()
controller.AddFinalizer(crdCopy, v1.VirtOperatorComponentFinalizer)
patchBytes, err := json.Marshal(crdCopy.Finalizers)
if err != nil {
return err
}
ops := fmt.Sprintf(`[{ "op": "add", "path": "%s", "value": %s }]`, finalizerPath, string(patchBytes))
_, err = ext.ApiextensionsV1().CustomResourceDefinitions().Patch(context.Background(), crd.Name, types.JSONPatchType, []byte(ops), metav1.PatchOptions{})
if err != nil {
return err
}
}
for _, crd := range needDeletion {
key, err := controller.KeyFunc(crd)
if err != nil {
return err
}
expectations.Crd.AddExpectedDeletion(kvkey, key)
err = ext.ApiextensionsV1().CustomResourceDefinitions().Delete(context.Background(), crd.Name, metav1.DeleteOptions{})
if err != nil {
expectations.Crd.DeletionObserved(kvkey, key)
log.Log.Errorf("Failed to delete crd %+v: %v", crd, err)
return err
}
}
for _, crd := range needFinalizerRemoved {
var ops string
if len(crd.Finalizers) > 1 {
crdCopy := crd.DeepCopy()
controller.RemoveFinalizer(crdCopy, v1.VirtOperatorComponentFinalizer)
newPatchBytes, err := json.Marshal(crdCopy.Finalizers)
if err != nil {
return err
}
oldPatchBytes, err := json.Marshal(crd.Finalizers)
if err != nil {
return err
}
ops = fmt.Sprintf(`[{ "op": "test", "path": "%s", "value": %s }, { "op": "replace", "path": "%s", "value": %s }]`,
finalizerPath,
string(oldPatchBytes),
finalizerPath,
string(newPatchBytes))
} else {
ops = fmt.Sprintf(`[{ "op": "remove", "path": "%s" }]`, finalizerPath)
}
_, err := ext.ApiextensionsV1().CustomResourceDefinitions().Patch(context.Background(), crd.Name, types.JSONPatchType, []byte(ops), metav1.PatchOptions{})
if err != nil {
return err
}
}
return nil
}