mirror of https://github.com/k3s-io/k3s
103 lines
3.1 KiB
Go
103 lines
3.1 KiB
Go
|
/*
|
||
|
Copyright 2019 The Kubernetes Authors.
|
||
|
|
||
|
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 helpers
|
||
|
|
||
|
import (
|
||
|
"encoding/json"
|
||
|
"fmt"
|
||
|
"time"
|
||
|
|
||
|
"k8s.io/api/core/v1"
|
||
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
||
|
"k8s.io/apimachinery/pkg/types"
|
||
|
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
|
||
|
"k8s.io/apimachinery/pkg/util/strategicpatch"
|
||
|
"k8s.io/apimachinery/pkg/util/wait"
|
||
|
clientset "k8s.io/client-go/kubernetes"
|
||
|
clientretry "k8s.io/client-go/util/retry"
|
||
|
"k8s.io/klog"
|
||
|
)
|
||
|
|
||
|
var updateLabelBackoff = wait.Backoff{
|
||
|
Steps: 5,
|
||
|
Duration: 100 * time.Millisecond,
|
||
|
Jitter: 1.0,
|
||
|
}
|
||
|
|
||
|
// AddOrUpdateLabelsOnNode updates the labels on the node and returns true on
|
||
|
// success and false on failure.
|
||
|
func AddOrUpdateLabelsOnNode(kubeClient clientset.Interface, labelsToUpdate map[string]string, node *v1.Node) bool {
|
||
|
err := addOrUpdateLabelsOnNode(kubeClient, node.Name, labelsToUpdate)
|
||
|
if err != nil {
|
||
|
utilruntime.HandleError(
|
||
|
fmt.Errorf(
|
||
|
"unable to update labels %+v for Node %q: %v",
|
||
|
labelsToUpdate,
|
||
|
node.Name,
|
||
|
err))
|
||
|
return false
|
||
|
}
|
||
|
|
||
|
klog.V(4).Infof("Updated labels %+v to Node %v", labelsToUpdate, node.Name)
|
||
|
return true
|
||
|
}
|
||
|
|
||
|
func addOrUpdateLabelsOnNode(kubeClient clientset.Interface, nodeName string, labelsToUpdate map[string]string) error {
|
||
|
firstTry := true
|
||
|
return clientretry.RetryOnConflict(updateLabelBackoff, func() error {
|
||
|
var err error
|
||
|
var node *v1.Node
|
||
|
// First we try getting node from the API server cache, as it's cheaper. If it fails
|
||
|
// we get it from etcd to be sure to have fresh data.
|
||
|
if firstTry {
|
||
|
node, err = kubeClient.CoreV1().Nodes().Get(nodeName, metav1.GetOptions{ResourceVersion: "0"})
|
||
|
firstTry = false
|
||
|
} else {
|
||
|
node, err = kubeClient.CoreV1().Nodes().Get(nodeName, metav1.GetOptions{})
|
||
|
}
|
||
|
if err != nil {
|
||
|
return err
|
||
|
}
|
||
|
|
||
|
// Make a copy of the node and update the labels.
|
||
|
newNode := node.DeepCopy()
|
||
|
if newNode.Labels == nil {
|
||
|
newNode.Labels = make(map[string]string)
|
||
|
}
|
||
|
for key, value := range labelsToUpdate {
|
||
|
newNode.Labels[key] = value
|
||
|
}
|
||
|
|
||
|
oldData, err := json.Marshal(node)
|
||
|
if err != nil {
|
||
|
return fmt.Errorf("failed to marshal the existing node %#v: %v", node, err)
|
||
|
}
|
||
|
newData, err := json.Marshal(newNode)
|
||
|
if err != nil {
|
||
|
return fmt.Errorf("failed to marshal the new node %#v: %v", newNode, err)
|
||
|
}
|
||
|
patchBytes, err := strategicpatch.CreateTwoWayMergePatch(oldData, newData, &v1.Node{})
|
||
|
if err != nil {
|
||
|
return fmt.Errorf("failed to create a two-way merge patch: %v", err)
|
||
|
}
|
||
|
if _, err := kubeClient.CoreV1().Nodes().Patch(node.Name, types.StrategicMergePatchType, patchBytes); err != nil {
|
||
|
return fmt.Errorf("failed to patch the node: %v", err)
|
||
|
}
|
||
|
return nil
|
||
|
})
|
||
|
}
|