forked from yamt/midonet-kubernetes
/
annotation.go
99 lines (92 loc) · 3.04 KB
/
annotation.go
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// Copyright (C) 2018 Midokura SARL.
// All rights reserved.
//
// 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 k8s
import (
"encoding/json"
"k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/strategicpatch"
"k8s.io/client-go/kubernetes"
)
func makeStrategicMergePatch(old, new, dataStruct interface{}) ([]byte, error) {
oldData, err := json.Marshal(old)
if err != nil {
return nil, err
}
newData, err := json.Marshal(new)
if err != nil {
return nil, err
}
patchBytes, err := strategicpatch.CreateTwoWayMergePatch(oldData, newData, dataStruct)
if err != nil {
return nil, err
}
return patchBytes, nil
}
func AddPodAnnotation(client *kubernetes.Clientset, namespace, name, key, value string) error {
old, err := client.CoreV1().Pods(namespace).Get(name, metav1.GetOptions{})
if err != nil {
return err
}
new := old.DeepCopy()
if new.ObjectMeta.Annotations == nil {
new.ObjectMeta.Annotations = make(map[string]string)
}
new.ObjectMeta.Annotations[key] = value
patchBytes, err := makeStrategicMergePatch(old, new, v1.Pod{})
if err != nil {
return err
}
_, err = client.CoreV1().Pods(namespace).Patch(name, types.StrategicMergePatchType, patchBytes)
// REVISIT: maybe worth a retry in case of version mismatch?
return err
}
func DeletePodAnnotation(client *kubernetes.Clientset, namespace, name, key string) error {
old, err := client.CoreV1().Pods(namespace).Get(name, metav1.GetOptions{})
if err != nil {
return err
}
new := old.DeepCopy()
delete(new.ObjectMeta.Annotations, key)
if len(new.ObjectMeta.Annotations) == 0 {
new.ObjectMeta.Annotations = nil
}
patchBytes, err := makeStrategicMergePatch(old, new, v1.Pod{})
if err != nil {
return err
}
_, err = client.CoreV1().Pods(namespace).Patch(name, types.StrategicMergePatchType, patchBytes)
// REVISIT: maybe worth a retry in case of version mismatch?
return err
}
func AddNodeAnnotation(client *kubernetes.Clientset, name, key, value string) error {
old, err := client.CoreV1().Nodes().Get(name, metav1.GetOptions{})
if err != nil {
return err
}
new := old.DeepCopy()
if new.ObjectMeta.Annotations == nil {
new.ObjectMeta.Annotations = make(map[string]string)
}
new.ObjectMeta.Annotations[key] = value
patchBytes, err := makeStrategicMergePatch(old, new, v1.Node{})
if err != nil {
return err
}
_, err = client.CoreV1().Nodes().Patch(name, types.StrategicMergePatchType, patchBytes)
// REVISIT: maybe worth a retry in case of version mismatch?
return err
}