252 lines
7.8 KiB
Go
252 lines
7.8 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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"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/kubectl"
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cmdutil "github.com/GoogleCloudPlatform/kubernetes/pkg/kubectl/cmd/util"
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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/golang/glog"
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)
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const (
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update_long = `Update a resource by filename or stdin.
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JSON and YAML formats are accepted.`
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update_example = `// Update a pod using the data in pod.json.
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$ kubectl update -f pod.json
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// Update a pod based on the JSON passed into stdin.
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$ cat pod.json | kubectl update -f -
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// Partially update a node using strategic merge patch
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kubectl --api-version=v1 update node k8s-node-1 --patch='{"spec":{"unschedulable":true}}'
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// Force update, delete and then re-create the resource
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kubectl update --force -f pod.json`
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)
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func NewCmdUpdate(f *cmdutil.Factory, out io.Writer) *cobra.Command {
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var filenames util.StringList
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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_long,
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Example: update_example,
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Run: func(cmd *cobra.Command, args []string) {
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err := RunUpdate(f, out, cmd, args, filenames)
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cmdutil.CheckCustomErr("Update failed", err)
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},
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}
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usage := "Filename, directory, or URL to file to use to update the resource."
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kubectl.AddJsonFilenameFlag(cmd, &filenames, usage)
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cmd.MarkFlagRequired("filename")
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cmd.Flags().String("patch", "", "A JSON document to override the existing resource. The resource is downloaded, patched with the JSON, then updated.")
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cmd.MarkFlagRequired("patch")
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cmd.Flags().Bool("force", false, "Delete and re-create the specified resource")
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cmd.Flags().Bool("cascade", false, "Only relevant during a force update. If true, cascade the deletion of the resources managed by this resource (e.g. Pods created by a ReplicationController). Default true.")
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cmd.Flags().Int("grace-period", -1, "Only relevant during a force update. Period of time in seconds given to the old resource to terminate gracefully. Ignored if negative.")
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cmd.Flags().Duration("timeout", 0, "Only relevant during a force update. The length of time to wait before giving up on a delete of the old resource, zero means determine a timeout from the size of the object")
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return cmd
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}
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func RunUpdate(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []string, filenames util.StringList) error {
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schema, err := f.Validator()
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if err != nil {
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return err
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}
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cmdNamespace, err := f.DefaultNamespace()
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if err != nil {
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return err
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}
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force := cmdutil.GetFlagBool(cmd, "force")
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patch := cmdutil.GetFlagString(cmd, "patch")
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if len(filenames) == 0 && len(patch) == 0 {
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return cmdutil.UsageError(cmd, "Must specify --filename or --patch to update")
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}
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if len(filenames) != 0 && len(patch) != 0 {
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return cmdutil.UsageError(cmd, "Can not specify both --filename and --patch")
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}
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if len(filenames) == 0 && force {
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return cmdutil.UsageError(cmd, "--force can only be used with --filename")
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}
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// TODO: Make patching work with -f, updating with patched JSON input files
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if len(filenames) == 0 {
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name, err := updateWithPatch(cmd, args, f, patch)
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if err != nil {
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return err
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}
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fmt.Fprintf(out, "%s\n", name)
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return nil
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}
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if len(filenames) == 0 {
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return cmdutil.UsageError(cmd, "Must specify --filename to update")
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}
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if force {
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return forceUpdate(f, out, cmd, args, filenames)
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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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Schema(schema).
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ContinueOnError().
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NamespaceParam(cmdNamespace).RequireNamespace().
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FilenameParam(filenames...).
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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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return 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 cmdutil.AddSourceToErr("updating", info.Source, err)
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}
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obj, err := resource.NewHelper(info.Client, info.Mapping).Update(info.Namespace, info.Name, true, data)
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if err != nil {
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return cmdutil.AddSourceToErr("updating", info.Source, err)
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}
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info.Refresh(obj, true)
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printObjectSpecificMessage(obj, out)
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fmt.Fprintf(out, "%s/%s\n", info.Mapping.Resource, info.Name)
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return nil
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})
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}
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func updateWithPatch(cmd *cobra.Command, args []string, f *cmdutil.Factory, patch string) (string, error) {
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cmdNamespace, err := f.DefaultNamespace()
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if err != nil {
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return "", 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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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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mapping, err := r.ResourceMapping()
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if err != nil {
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return "", err
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}
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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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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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name, namespace := infos[0].Name, infos[0].Namespace
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helper := resource.NewHelper(client, mapping)
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_, err = helper.Patch(namespace, name, api.StrategicMergePatchType, []byte(patch))
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return name, err
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}
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func forceUpdate(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []string, filenames util.StringList) error {
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schema, err := f.Validator()
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if err != nil {
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return err
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}
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cmdNamespace, err := f.DefaultNamespace()
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if err != nil {
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return 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(filenames...).
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ResourceTypeOrNameArgs(false, args...).RequireObject(false).
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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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//Update will create a resource if it doesn't exist already, so ignore not found error
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ignoreNotFound := true
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// By default use a reaper to delete all related resources.
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if cmdutil.GetFlagBool(cmd, "cascade") {
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glog.Warningf("\"cascade\" is set, kubectl will delete and re-create all resources managed by this resource (e.g. Pods created by a ReplicationController). Consider using \"kubectl rolling-update\" if you want to update a ReplicationController together with its Pods.")
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err = ReapResult(r, f, out, cmdutil.GetFlagBool(cmd, "cascade"), ignoreNotFound, cmdutil.GetFlagDuration(cmd, "timeout"), cmdutil.GetFlagInt(cmd, "grace-period"))
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} else {
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err = DeleteResult(r, out, ignoreNotFound)
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}
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if err != nil {
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return err
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}
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r = resource.NewBuilder(mapper, typer, f.ClientMapperForCommand()).
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Schema(schema).
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ContinueOnError().
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NamespaceParam(cmdNamespace).RequireNamespace().
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FilenameParam(filenames...).
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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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count := 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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obj, err := resource.NewHelper(info.Client, info.Mapping).Create(info.Namespace, true, data)
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if err != nil {
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return err
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}
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count++
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info.Refresh(obj, true)
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printObjectSpecificMessage(obj, out)
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fmt.Fprintf(out, "%s/%s\n", info.Mapping.Resource, info.Name)
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return nil
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})
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if err != nil {
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return err
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}
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if count == 0 {
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return fmt.Errorf("no objects passed to update")
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}
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return nil
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}
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