105 lines
2.9 KiB
Go
105 lines
2.9 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package utils
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import (
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"fmt"
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"strings"
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"time"
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"github.com/golang/glog"
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apierrs "k8s.io/apimachinery/pkg/api/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/types"
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"k8s.io/kubernetes/pkg/api/v1"
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"k8s.io/kubernetes/pkg/client/clientset_generated/clientset"
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)
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const (
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retries = 5
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)
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func AddLabelsToNode(c clientset.Interface, nodeName string, labels map[string]string) error {
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tokens := make([]string, 0, len(labels))
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for k, v := range labels {
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tokens = append(tokens, "\""+k+"\":\""+v+"\"")
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}
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labelString := "{" + strings.Join(tokens, ",") + "}"
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patch := fmt.Sprintf(`{"metadata":{"labels":%v}}`, labelString)
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var err error
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for attempt := 0; attempt < retries; attempt++ {
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_, err = c.Core().Nodes().Patch(nodeName, types.MergePatchType, []byte(patch))
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if err != nil {
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if !apierrs.IsConflict(err) {
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return err
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}
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} else {
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break
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}
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time.Sleep(100 * time.Millisecond)
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}
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return err
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}
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// RemoveLabelOffNode is for cleaning up labels temporarily added to node,
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// won't fail if target label doesn't exist or has been removed.
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func RemoveLabelOffNode(c clientset.Interface, nodeName string, labelKeys []string) error {
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var node *v1.Node
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var err error
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for attempt := 0; attempt < retries; attempt++ {
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node, err = c.Core().Nodes().Get(nodeName, metav1.GetOptions{})
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if err != nil {
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return err
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}
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if node.Labels == nil {
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return nil
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}
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for _, labelKey := range labelKeys {
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if node.Labels == nil || len(node.Labels[labelKey]) == 0 {
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break
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}
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delete(node.Labels, labelKey)
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}
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_, err = c.Core().Nodes().Update(node)
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if err != nil {
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if !apierrs.IsConflict(err) {
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return err
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} else {
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glog.V(2).Infof("Conflict when trying to remove a labels %v from %v", labelKeys, nodeName)
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}
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} else {
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break
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}
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time.Sleep(100 * time.Millisecond)
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}
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return err
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}
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// VerifyLabelsRemoved checks if Node for given nodeName does not have any of labels from labelKeys.
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// Return non-nil error if it does.
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func VerifyLabelsRemoved(c clientset.Interface, nodeName string, labelKeys []string) error {
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node, err := c.Core().Nodes().Get(nodeName, metav1.GetOptions{})
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if err != nil {
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return err
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}
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for _, labelKey := range labelKeys {
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if node.Labels != nil && len(node.Labels[labelKey]) != 0 {
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return fmt.Errorf("Failed removing label " + labelKey + " of the node " + nodeName)
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}
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}
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return nil
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}
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