mirror of https://github.com/k3s-io/k3s
122 lines
3.7 KiB
Go
122 lines
3.7 KiB
Go
/*
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Copyright 2014 Google Inc. 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/GoogleCloudPlatform/kubernetes/pkg/kubectl/resource"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
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"github.com/spf13/cobra"
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)
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func (f *Factory) NewCmdUpdate(out io.Writer) *cobra.Command {
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flags := &struct {
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Filenames util.StringList
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}{}
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cmd := &cobra.Command{
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Use: "update -f filename",
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Short: "Update a resource by filename or stdin",
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Long: `Update a resource by filename or stdin.
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JSON and YAML formats are accepted.
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Examples:
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$ kubectl update -f pod.json
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<update a pod using the data in pod.json>
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$ cat pod.json | kubectl update -f -
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<update a pod based on the json passed into stdin>
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$ kubectl update pods my-pod --patch='{ "apiVersion": "v1beta1", "desiredState": { "manifest": [{ "cpu": 100 }]}}'
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<update a pod by downloading it, applying the patch, then updating, requires apiVersion be specified>`,
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Run: func(cmd *cobra.Command, args []string) {
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schema, err := f.Validator(cmd)
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checkErr(err)
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cmdNamespace, err := f.DefaultNamespace(cmd)
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checkErr(err)
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mapper, typer := f.Object(cmd)
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r := resource.NewBuilder(mapper, typer, ClientMapperForCommand(cmd, f)).
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ContinueOnError().
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NamespaceParam(cmdNamespace).RequireNamespace().
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FilenameParam(flags.Filenames...).
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Flatten().
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Do()
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patch := GetFlagString(cmd, "patch")
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if len(flags.Filenames) == 0 && len(patch) == 0 {
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usageError(cmd, "Must specify --filename or --patch to update")
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}
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if len(flags.Filenames) != 0 && len(patch) != 0 {
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usageError(cmd, "Can not specify both --filename and --patch")
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}
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if len(flags.Filenames) > 0 {
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err := r.Visit(func(info *resource.Info) error {
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data, err := info.Mapping.Codec.Encode(info.Object)
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if err != nil {
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return err
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}
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if err := schema.ValidateBytes(data); err != nil {
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return err
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}
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if err := resource.NewHelper(info.Client, info.Mapping).
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Update(info.Namespace, info.Name, true, data); err != nil {
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return err
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}
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fmt.Fprintf(out, "%s\n", info.Name)
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return nil
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})
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checkErr(err)
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} else {
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// TODO: Make patching work with -f, updating with patched JSON input files
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name := updateWithPatch(cmd, args, f, patch)
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fmt.Fprintf(out, "%s\n", name)
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}
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},
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}
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cmd.Flags().VarP(&flags.Filenames, "filename", "f", "Filename, directory, or URL to file to use to update the resource")
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cmd.Flags().String("patch", "", "A JSON document to override the existing resource. The resource is downloaded, then patched with the JSON, the updated")
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return cmd
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}
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func updateWithPatch(cmd *cobra.Command, args []string, f *Factory, patch string) string {
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cmdNamespace, err := f.DefaultNamespace(cmd)
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checkErr(err)
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mapper, _ := f.Object(cmd)
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mapping, namespace, name := ResourceFromArgs(cmd, args, mapper, cmdNamespace)
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client, err := f.RESTClient(cmd, mapping)
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checkErr(err)
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helper := resource.NewHelper(client, mapping)
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obj, err := helper.Get(namespace, name)
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checkErr(err)
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Merge(obj, patch, mapping.Kind)
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data, err := helper.Codec.Encode(obj)
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checkErr(err)
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err = helper.Update(namespace, name, true, data)
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checkErr(err)
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return name
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}
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