mirror of https://github.com/k3s-io/k3s
130 lines
4.0 KiB
Go
130 lines
4.0 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors All rights reserved.
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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 cmd
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import (
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"fmt"
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"io"
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"github.com/spf13/cobra"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/kubectl"
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cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
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"k8s.io/kubernetes/pkg/kubectl/resource"
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"k8s.io/kubernetes/pkg/util/yaml"
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)
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// PatchOptions is the start of the data required to perform the operation. As new fields are added, add them here instead of
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// referencing the cmd.Flags()
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type PatchOptions struct {
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Filenames []string
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}
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const (
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patch_long = `Update field(s) of a resource using strategic merge patch
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JSON and YAML formats are accepted.
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Please refer to the models in https://htmlpreview.github.io/?https://github.com/kubernetes/kubernetes/blob/HEAD/docs/api-reference/v1/definitions.html to find if a field is mutable.`
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patch_example = `
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# Partially update a node using strategic merge patch
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kubectl patch node k8s-node-1 -p '{"spec":{"unschedulable":true}}'
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# Partially update a node identified by the type and name specified in "node.json" using strategic merge patch
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kubectl patch -f node.json -p '{"spec":{"unschedulable":true}}'
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# Update a container's image; spec.containers[*].name is required because it's a merge key
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kubectl patch pod valid-pod -p '{"spec":{"containers":[{"name":"kubernetes-serve-hostname","image":"new image"}]}}'`
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)
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func NewCmdPatch(f *cmdutil.Factory, out io.Writer) *cobra.Command {
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options := &PatchOptions{}
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cmd := &cobra.Command{
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Use: "patch (-f FILENAME | TYPE NAME) -p PATCH",
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Short: "Update field(s) of a resource using strategic merge patch.",
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Long: patch_long,
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Example: patch_example,
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Run: func(cmd *cobra.Command, args []string) {
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cmdutil.CheckErr(cmdutil.ValidateOutputArgs(cmd))
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shortOutput := cmdutil.GetFlagString(cmd, "output") == "name"
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err := RunPatch(f, out, cmd, args, shortOutput, options)
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cmdutil.CheckErr(err)
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},
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}
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cmd.Flags().StringP("patch", "p", "", "The patch to be applied to the resource JSON file.")
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cmd.MarkFlagRequired("patch")
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cmdutil.AddOutputFlagsForMutation(cmd)
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usage := "Filename, directory, or URL to a file identifying the resource to update"
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kubectl.AddJsonFilenameFlag(cmd, &options.Filenames, usage)
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return cmd
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}
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func RunPatch(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []string, shortOutput bool, options *PatchOptions) error {
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cmdNamespace, enforceNamespace, err := f.DefaultNamespace()
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if err != nil {
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return err
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}
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patch := cmdutil.GetFlagString(cmd, "patch")
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if len(patch) == 0 {
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return cmdutil.UsageError(cmd, "Must specify -p to patch")
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}
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patchBytes, err := yaml.ToJSON([]byte(patch))
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if err != nil {
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return fmt.Errorf("unable to parse %q: %v", patch, err)
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}
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mapper, typer := f.Object()
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r := resource.NewBuilder(mapper, typer, f.ClientMapperForCommand()).
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ContinueOnError().
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NamespaceParam(cmdNamespace).DefaultNamespace().
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FilenameParam(enforceNamespace, options.Filenames...).
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ResourceTypeOrNameArgs(false, args...).
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Flatten().
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Do()
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err = r.Err()
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if err != nil {
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return err
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}
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infos, err := r.Infos()
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if err != nil {
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return err
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}
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if len(infos) > 1 {
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return fmt.Errorf("multiple resources provided")
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}
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info := infos[0]
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name, namespace := info.Name, info.Namespace
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mapping := info.ResourceMapping()
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client, err := f.RESTClient(mapping)
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if err != nil {
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return err
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}
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helper := resource.NewHelper(client, mapping)
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_, err = helper.Patch(namespace, name, api.StrategicMergePatchType, patchBytes)
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if err != nil {
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return err
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}
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cmdutil.PrintSuccess(mapper, shortOutput, out, "", name, "patched")
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return nil
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}
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