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namespace.go
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namespace.go
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// 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
//
// https://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.
//
// Original source: github.com/micro/go-micro/v3/runtime/kubernetes/namespace.go
package kubernetes
import (
"strings"
"github.com/2637309949/micro/v3/service/logger"
"github.com/2637309949/micro/v3/service/runtime"
"github.com/2637309949/micro/v3/service/runtime/kubernetes/client"
)
func (k *kubernetes) ensureNamepaceExists(ns string) error {
namespace := client.Format(ns)
if namespace == client.DefaultNamespace {
return nil
}
exist, err := k.namespaceExists(namespace)
if err == nil && exist {
return nil
}
if err != nil {
if logger.V(logger.WarnLevel, logger.DefaultLogger) {
logger.Warnf("Error checking namespace %v exists: %v", namespace, err)
}
return err
}
if err := k.autoCreateNamespace(namespace); err != nil {
if logger.V(logger.WarnLevel, logger.DefaultLogger) {
logger.Warnf("Error creating namespace %v: %v", namespace, err)
}
return err
}
return nil
}
// namespaceExists returns a boolean indicating if a namespace exists in the cache
func (k *kubernetes) namespaceExists(name string) (bool, error) {
// populate the cache
if k.namespaces == nil {
if logger.V(logger.DebugLevel, logger.DefaultLogger) {
logger.Debugf("Populating namespace cache")
}
namespaceList := new(client.NamespaceList)
resource := &client.Resource{Kind: "namespace", Value: namespaceList}
if err := k.client.List(resource); err != nil {
return false, err
}
if logger.V(logger.DebugLevel, logger.DefaultLogger) {
logger.Debugf("Populated namespace cache successfully with %v items", len(namespaceList.Items))
}
k.namespaces = namespaceList.Items
}
// check if the namespace exists in the cache
for _, n := range k.namespaces {
if n.Metadata.Name == name {
return true, nil
}
}
return false, nil
}
// autoCreateNamespace creates a new k8s namespace
func (k *kubernetes) autoCreateNamespace(namespace string) error {
ns := client.Namespace{Metadata: &client.Metadata{Name: namespace}}
err := k.client.Create(&client.Resource{Kind: "namespace", Value: ns})
// ignore err already exists
if err != nil && strings.Contains(err.Error(), "already exists") {
logger.Debugf("Ignoring ErrAlreadyExists for namespace %v: %v", namespace, err)
err = nil
}
// add to cache and create networkpolicy
if err == nil && k.namespaces != nil {
k.namespaces = append(k.namespaces, ns)
}
return err
}
// createNamespace creates a namespace resource
func (k *kubernetes) createNamespace(namespace *runtime.Namespace) error {
err := k.client.Create(&client.Resource{
Kind: "namespace",
Name: namespace.Name,
Value: &client.Namespace{
Metadata: &client.Metadata{
Name: namespace.Name,
},
},
}, client.CreateNamespace(namespace.Name))
if err != nil {
if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
logger.Errorf("Error creating namespace %s: %v", namespace.String(), err)
}
}
return err
}
// deleteNamespace deletes a namespace resource
func (k *kubernetes) deleteNamespace(namespace *runtime.Namespace) error {
err := k.client.Delete(&client.Resource{
Kind: "namespace",
Name: namespace.Name,
Value: &client.Namespace{
Metadata: &client.Metadata{
Name: namespace.Name,
},
},
}, client.DeleteNamespace(namespace.Name))
if err != nil {
if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
logger.Errorf("Error deleting namespace %s: %v", namespace.String(), err)
}
}
return err
}