forked from projectcalico/calico
/
k8s_resources.go
73 lines (64 loc) · 2.07 KB
/
k8s_resources.go
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// Copyright (c) 2021 Tigera, Inc. 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 winupgrade
import (
"context"
"time"
apierrs "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/kubernetes"
)
// k8snode holds a collection of helper functions for Kubernetes node.
type k8snode string
// Add / remove node annotations to node. Perform Get/Check/Update so that it always working on latest version.
// If node labels has been set already, do nothing.
func (n k8snode) addRemoveNodeAnnotations(k8sClientset *kubernetes.Clientset,
toAdd map[string]string,
toRemove []string) error {
nodeName := string(n)
return wait.PollImmediate(3*time.Second, 1*time.Minute, func() (bool, error) {
node, err := k8sClientset.CoreV1().Nodes().Get(context.Background(), nodeName, metav1.GetOptions{})
if err != nil {
return false, err
}
needUpdate := false
for k, v := range toAdd {
if currentVal, ok := node.Annotations[k]; ok && currentVal == v {
continue
}
node.Annotations[k] = v
needUpdate = true
}
for _, k := range toRemove {
if _, ok := node.Annotations[k]; ok {
delete(node.Annotations, k)
needUpdate = true
}
}
if needUpdate {
_, err := k8sClientset.CoreV1().Nodes().UpdateStatus(context.Background(), node, metav1.UpdateOptions{})
if err == nil {
return true, nil
}
if !apierrs.IsConflict(err) {
return false, err
}
// Retry on update conflicts.
return false, nil
}
// no update needed
return true, nil
})
}