Add --force to kubectl update

contrib/completions/bash/kubectl

@@ -331,15 +331,19 @@ _kubectl_update()
     flags_with_completion=()
     flags_completion=()
 
+    flags+=("--cascade")
     flags+=("--filename=")
     flags_with_completion+=("--filename")
     flags_completion+=("__handle_filename_extension_flag json|yaml|yml")
     two_word_flags+=("-f")
     flags_with_completion+=("-f")
     flags_completion+=("__handle_filename_extension_flag json|yaml|yml")
+    flags+=("--force")
+    flags+=("--grace-period=")
     flags+=("--help")
     flags+=("-h")
     flags+=("--patch=")
+    flags+=("--timeout=")
 
     must_have_one_flag=()
     must_have_one_flag+=("--filename=")

docs/kubectl_delete.md

@@ -43,7 +43,7 @@ $ kubectl delete pods --all
 
 ```
       --all=false: [-all] to select all the specified resources.
-      --cascade=true: If true, cascade the delete resources managed by this resource (e.g. Pods created by a ReplicationController).  Default true.
+      --cascade=true: If true, cascade the deletion of the resources managed by this resource (e.g. Pods created by a ReplicationController).  Default true.
   -f, --filename=[]: Filename, directory, or URL to a file containing the resource to delete.
       --grace-period=-1: Period of time in seconds given to the resource to terminate gracefully. Ignored if negative.
   -h, --help=false: help for delete
@@ -84,6 +84,6 @@ $ kubectl delete pods --all
 ### SEE ALSO
 * [kubectl](kubectl.md)	 - kubectl controls the Kubernetes cluster manager
 
-###### Auto generated by spf13/cobra at 2015-06-03 18:21:01.053120485 +0000 UTC
+###### Auto generated by spf13/cobra at 2015-06-26 00:15:55.835198432 +0000 UTC
 
 [![Analytics](https://kubernetes-site.appspot.com/UA-36037335-10/GitHub/docs/kubectl_delete.md?pixel)]()

docs/kubectl_update.md

@@ -24,14 +24,21 @@ $ cat pod.json | kubectl update -f -
 
 // Partially update a node using strategic merge patch
 kubectl --api-version=v1 update node k8s-node-1 --patch='{"spec":{"unschedulable":true}}'
+
+// Force update, delete and then re-create the resource
+kubectl update --force -f pod.json
 ```
 
 ### Options
 
 ```
+      --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.
   -f, --filename=[]: Filename, directory, or URL to file to use to update the resource.
+      --force=false: Delete and re-create the specified resource
+      --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.
   -h, --help=false: help for update
       --patch="": A JSON document to override the existing resource. The resource is downloaded, patched with the JSON, then updated.
+      --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
 ```
 
 ### Options inherited from parent commands
@@ -66,6 +73,6 @@ kubectl --api-version=v1 update node k8s-node-1 --patch='{"spec":{"unschedulable
 ### SEE ALSO
 * [kubectl](kubectl.md)	 - kubectl controls the Kubernetes cluster manager
 
-###### Auto generated by spf13/cobra at 2015-06-18 19:03:00.935576604 +0000 UTC
+###### Auto generated by spf13/cobra at 2015-06-26 00:15:55.835055081 +0000 UTC
 
 [![Analytics](https://kubernetes-site.appspot.com/UA-36037335-10/GitHub/docs/kubectl_update.md?pixel)]()

docs/man/man1/kubectl-delete.1

@@ -35,7 +35,7 @@ will be lost along with the rest of the resource.
 
 .PP
 \fB\-\-cascade\fP=true
-    If true, cascade the delete resources managed by this resource (e.g. Pods created by a ReplicationController).  Default true.
+    If true, cascade the deletion of the resources managed by this resource (e.g. Pods created by a ReplicationController).  Default true.
 
 .PP
 \fB\-f\fP, \fB\-\-filename\fP=[]

docs/man/man1/kubectl-update.1

@@ -20,10 +20,22 @@ JSON and YAML formats are accepted.
 
 
 .SH OPTIONS
+.PP
+\fB\-\-cascade\fP=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.
+
 .PP
 \fB\-f\fP, \fB\-\-filename\fP=[]
     Filename, directory, or URL to file to use to update the resource.
 
+.PP
+\fB\-\-force\fP=false
+    Delete and re\-create the specified resource
+
+.PP
+\fB\-\-grace\-period\fP=\-1
+    Only relevant during a force update. Period of time in seconds given to the old resource to terminate gracefully. Ignored if negative.
+
 .PP
 \fB\-h\fP, \fB\-\-help\fP=false
     help for update
@@ -32,6 +44,10 @@ JSON and YAML formats are accepted.
 \fB\-\-patch\fP=""
     A JSON document to override the existing resource. The resource is downloaded, patched with the JSON, then updated.
 
+.PP
+\fB\-\-timeout\fP=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
+
 
 .SH OPTIONS INHERITED FROM PARENT COMMANDS
 .PP
@@ -145,6 +161,9 @@ $ cat pod.json | kubectl update \-f \-
 // Partially update a node using strategic merge patch
 kubectl \-\-api\-version=v1 update node k8s\-node\-1 \-\-patch='\{"spec":\{"unschedulable":true\}\}'
 
+// Force update, delete and then re\-create the resource
+kubectl update \-\-force \-f pod.json
+
 .fi
 .RE
 

hack/test-cmd.sh

@@ -315,6 +315,13 @@ for version in "${kube_api_versions[@]}"; do
   # Post-condition: valid-pod POD has image nginx
   kube::test::get_object_assert pods "{{range.items}}{{$image_field}}:{{end}}" 'nginx:'
 
+  ## --force update pod can change other field, e.g., spec.container.name
+  # Command
+  kubectl get "${kube_flags[@]}" pod valid-pod -o json | sed 's/"kubernetes-serve-hostname"/"update-k8s-serve-hostname"/g' > tmp-valid-pod.json
+  kubectl update "${kube_flags[@]}" --force -f tmp-valid-pod.json
+  # Post-condition: spec.container.name = "update-k8s-serve-hostname"
+  kube::test::get_object_assert 'pod valid-pod' "{{(index .spec.containers 0).name}}" 'update-k8s-serve-hostname'
+
   ### Overwriting an existing label is not permitted
   # Pre-condition: name is valid-pod
   kube::test::get_object_assert 'pod valid-pod' "{{${labels_field}.name}}" 'valid-pod'

pkg/kubectl/cmd/delete.go

@@ -75,7 +75,7 @@ func NewCmdDelete(f *cmdutil.Factory, out io.Writer) *cobra.Command {
 	cmd.Flags().StringP("selector", "l", "", "Selector (label query) to filter on.")
 	cmd.Flags().Bool("all", false, "[-all] to select all the specified resources.")
 	cmd.Flags().Bool("ignore-not-found", false, "Treat \"resource not found\" as a successful delete.")
-	cmd.Flags().Bool("cascade", true, "If true, cascade the delete resources managed by this resource (e.g. Pods created by a ReplicationController).  Default true.")
+	cmd.Flags().Bool("cascade", true, "If true, cascade the deletion of the resources managed by this resource (e.g. Pods created by a ReplicationController).  Default true.")
 	cmd.Flags().Int("grace-period", -1, "Period of time in seconds given to the resource to terminate gracefully. Ignored if negative.")
 	cmd.Flags().Duration("timeout", 0, "The length of time to wait before giving up on a delete, zero means determine a timeout from the size of the object")
 	return cmd

pkg/kubectl/cmd/update.go

@@ -27,6 +27,7 @@ import (
 	cmdutil "github.com/GoogleCloudPlatform/kubernetes/pkg/kubectl/cmd/util"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/kubectl/resource"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
+	"github.com/golang/glog"
 )
 
 const (
@@ -40,7 +41,10 @@ $ kubectl update -f pod.json
 $ cat pod.json | kubectl update -f -
 
 // Partially update a node using strategic merge patch
-kubectl --api-version=v1 update node k8s-node-1 --patch='{"spec":{"unschedulable":true}}'`
+kubectl --api-version=v1 update node k8s-node-1 --patch='{"spec":{"unschedulable":true}}'
+
+// Force update, delete and then re-create the resource
+kubectl update --force -f pod.json`
 )
 
 func NewCmdUpdate(f *cmdutil.Factory, out io.Writer) *cobra.Command {
@@ -60,6 +64,10 @@ func NewCmdUpdate(f *cmdutil.Factory, out io.Writer) *cobra.Command {
 	cmd.MarkFlagRequired("filename")
 	cmd.Flags().String("patch", "", "A JSON document to override the existing resource. The resource is downloaded, patched with the JSON, then updated.")
 	cmd.MarkFlagRequired("patch")
+	cmd.Flags().Bool("force", false, "Delete and re-create the specified resource")
+	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.")
+	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.")
+	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")
 	return cmd
 }
 
@@ -74,13 +82,17 @@ func RunUpdate(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []str
 		return err
 	}
 
+	force := cmdutil.GetFlagBool(cmd, "force")
 	patch := cmdutil.GetFlagString(cmd, "patch")
 	if len(filenames) == 0 && len(patch) == 0 {
 		return cmdutil.UsageError(cmd, "Must specify --filename or --patch to update")
 	}
 	if len(filenames) != 0 && len(patch) != 0 {
 		return cmdutil.UsageError(cmd, "Can not specify both --filename and --patch")
 	}
+	if len(filenames) == 0 && force {
+		return cmdutil.UsageError(cmd, "--force can only be used with --filename")
+	}
 
 	// TODO: Make patching work with -f, updating with patched JSON input files
 	if len(filenames) == 0 {
@@ -95,6 +107,10 @@ func RunUpdate(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []str
 		return cmdutil.UsageError(cmd, "Must specify --filename to update")
 	}
 
+	if force {
+		return forceUpdate(f, out, cmd, args, filenames)
+	}
+
 	mapper, typer := f.Object()
 	r := resource.NewBuilder(mapper, typer, f.ClientMapperForCommand()).
 		Schema(schema).
@@ -160,3 +176,76 @@ func updateWithPatch(cmd *cobra.Command, args []string, f *cmdutil.Factory, patc
 	_, err = helper.Patch(namespace, name, api.StrategicMergePatchType, []byte(patch))
 	return name, err
 }
+
+func forceUpdate(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []string, filenames util.StringList) error {
+	schema, err := f.Validator()
+	if err != nil {
+		return err
+	}
+
+	cmdNamespace, err := f.DefaultNamespace()
+	if err != nil {
+		return err
+	}
+
+	mapper, typer := f.Object()
+	r := resource.NewBuilder(mapper, typer, f.ClientMapperForCommand()).
+		ContinueOnError().
+		NamespaceParam(cmdNamespace).DefaultNamespace().
+		FilenameParam(filenames...).
+		ResourceTypeOrNameArgs(false, args...).RequireObject(false).
+		Flatten().
+		Do()
+	err = r.Err()
+	if err != nil {
+		return err
+	}
+	//Update will create a resource if it doesn't exist already, so ignore not found error
+	ignoreNotFound := true
+	// By default use a reaper to delete all related resources.
+	if cmdutil.GetFlagBool(cmd, "cascade") {
+		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.")
+		err = ReapResult(r, f, out, cmdutil.GetFlagBool(cmd, "cascade"), ignoreNotFound, cmdutil.GetFlagDuration(cmd, "timeout"), cmdutil.GetFlagInt(cmd, "grace-period"))
+	} else {
+		err = DeleteResult(r, out, ignoreNotFound)
+	}
+	if err != nil {
+		return err
+	}
+
+	r = resource.NewBuilder(mapper, typer, f.ClientMapperForCommand()).
+		Schema(schema).
+		ContinueOnError().
+		NamespaceParam(cmdNamespace).RequireNamespace().
+		FilenameParam(filenames...).
+		Flatten().
+		Do()
+	err = r.Err()
+	if err != nil {
+		return err
+	}
+
+	count := 0
+	err = r.Visit(func(info *resource.Info) error {
+		data, err := info.Mapping.Codec.Encode(info.Object)
+		if err != nil {
+			return err
+		}
+		obj, err := resource.NewHelper(info.Client, info.Mapping).Create(info.Namespace, true, data)
+		if err != nil {
+			return err
+		}
+		count++
+		info.Refresh(obj, true)
+		printObjectSpecificMessage(obj, out)
+		fmt.Fprintf(out, "%s/%s\n", info.Mapping.Resource, info.Name)
+		return nil
+	})
+	if err != nil {
+		return err
+	}
+	if count == 0 {
+		return fmt.Errorf("no objects passed to update")
+	}
+	return nil
+}