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node controller: set both deprecated Beta and GA labels for Zone/Regi…
…on topology Signed-off-by: Andrew Sy Kim <kiman@vmware.com>
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102 changes: 102 additions & 0 deletions
102
staging/src/k8s.io/cloud-provider/node/helpers/labels.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| /* | ||
| 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 | ||
| }) | ||
| } |