forked from kubermatic/kubermatic
/
cleanup.go
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/
cleanup.go
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/*
Copyright 2020 The Kubermatic Kubernetes Platform contributors.
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.
*/
package main
import (
"context"
"go.uber.org/zap"
kubernetesdashboard "github.com/kubermatic/kubermatic/api/pkg/resources/kubernetes-dashboard"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/apimachinery/pkg/util/wait"
ctrlruntimeclient "sigs.k8s.io/controller-runtime/pkg/client"
)
var (
protectedNamespaces = sets.NewString(
metav1.NamespaceDefault,
metav1.NamespaceSystem,
metav1.NamespacePublic,
corev1.NamespaceNodeLease,
kubernetesdashboard.Namespace)
)
func deleteAllNonDefaultNamespaces(log *zap.SugaredLogger, client ctrlruntimeclient.Client) error {
log.Info("Removing non-default namespaces...")
return wait.Poll(defaultUserClusterPollInterval, defaultTimeout, func() (done bool, err error) {
namespaceList := &corev1.NamespaceList{}
ctx := context.Background()
if err := client.List(ctx, namespaceList); err != nil {
log.Errorw("Failed to list namespaces", zap.Error(err))
return false, nil
}
// This check assumes no one deleted one of the protected namespaces
if len(namespaceList.Items) <= protectedNamespaces.Len() {
return true, nil
}
for _, namespace := range namespaceList.Items {
if protectedNamespaces.Has(namespace.Name) {
continue
}
// If it's not gone & the DeletionTimestamp is nil, delete it
if namespace.DeletionTimestamp == nil {
// make sure to create a new variable, or else subsequent With() calls will
// *add* new attributes instead of overriding the existing namespace value
log := log.With("namespace", namespace.Name)
if err := client.Delete(ctx, &namespace); err != nil {
log.Errorw("Failed to delete namespace", zap.Error(err))
} else {
log.Debug("Deleted namespace.")
}
}
}
return false, nil
})
}