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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,87 @@ | ||
| /* | ||
| Copied from | ||
| https://github.com/kubernetes/kubectl/blob/master/pkg/drain/cordon.go | ||
| at commit f9460c53339c4bb60b20031e3c6125e8bac679e2 to add node cordon feature. | ||
| */ | ||
| /* | ||
| 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 kubernetes | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
|
|
||
| apiv1 "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" | ||
| ) | ||
|
|
||
| // CordonHelper wraps functionality to cordon/uncordon nodes | ||
| type cordonHelper struct { | ||
| node *apiv1.Node | ||
| desired bool | ||
| } | ||
|
|
||
| // NewCordonHelper returns a new CordonHelper | ||
| func newCordonHelper(node *apiv1.Node) *cordonHelper { | ||
| return &cordonHelper{ | ||
| node: node, | ||
| } | ||
| } | ||
|
|
||
| // UpdateIfRequired returns true if c.node.Spec.Unschedulable isn't already set, | ||
| // or false when no change is needed | ||
| func (c *cordonHelper) updateIfRequired(desired bool) bool { | ||
| c.desired = desired | ||
|
|
||
| return c.node.Spec.Unschedulable != c.desired | ||
| } | ||
|
|
||
| // PatchOrReplace uses given clientset to update the node status, either by patching or | ||
| // updating the given node object; it may return error if the object cannot be encoded as | ||
| // JSON, or if either patch or update calls fail; it will also return a second error | ||
| // whenever creating a patch has failed | ||
| func (c *cordonHelper) patchOrReplace(clientset kubernetes.Interface, serverDryRun bool) (error, error) { | ||
| client := clientset.CoreV1().Nodes() | ||
|
|
||
| oldData, err := json.Marshal(c.node) | ||
| if err != nil { | ||
| return err, nil | ||
| } | ||
|
|
||
| c.node.Spec.Unschedulable = c.desired | ||
|
|
||
| newData, err := json.Marshal(c.node) | ||
| if err != nil { | ||
| return err, nil | ||
| } | ||
|
|
||
| patchBytes, patchErr := strategicpatch.CreateTwoWayMergePatch(oldData, newData, c.node) | ||
| if patchErr == nil { | ||
| _, err = client.Patch(c.node.Name, types.StrategicMergePatchType, patchBytes) | ||
| } else { | ||
| updateOptions := metav1.UpdateOptions{} | ||
| if serverDryRun { | ||
| updateOptions.DryRun = []string{metav1.DryRunAll} | ||
| } | ||
| _, err = client.Update(c.node) | ||
| } | ||
| return err, patchErr | ||
| } |
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