allow patch to handle multiple types

contrib/completions/bash/kubectl

@@ -754,6 +754,7 @@ _kubectl_patch()
     flags+=("--patch=")
     two_word_flags+=("-p")
     flags+=("--record")
+    flags+=("--type=")
     flags+=("--alsologtostderr")
     flags+=("--api-version=")
     flags+=("--certificate-authority=")

docs/man/man1/kubectl-patch.1

@@ -40,6 +40,10 @@ Please refer to the models in
 \fB\-\-record\fP=false
     Record current kubectl command in the resource annotation.
 
+.PP
+\fB\-\-type\fP="strategic"
+    The type of patch being provided; one of [json merge strategic]
+
 
 .SH OPTIONS INHERITED FROM PARENT COMMANDS
 .PP
@@ -150,6 +154,9 @@ kubectl patch \-f node.json \-p '{"spec":{"unschedulable":true}}'
 # Update a container's image; spec.containers[*].name is required because it's a merge key
 kubectl patch pod valid\-pod \-p '{"spec":{"containers":[{"name":"kubernetes\-serve\-hostname","image":"new image"}]}}'
 
+# Update a container's image using a json patch with positional arrays
+kubectl patch pod valid\-pod \-type='json' \-p='[{"op": "replace", "path": "/spec/containers/0/image", "value":"new image"}]'
+
 .fi
 .RE
 

docs/user-guide/kubectl/kubectl_patch.md

@@ -61,6 +61,9 @@ kubectl patch -f node.json -p '{"spec":{"unschedulable":true}}'
 
 # Update a container's image; spec.containers[*].name is required because it's a merge key
 kubectl patch pod valid-pod -p '{"spec":{"containers":[{"name":"kubernetes-serve-hostname","image":"new image"}]}}'
+
+# Update a container's image using a json patch with positional arrays
+kubectl patch pod valid-pod -type='json' -p='[{"op": "replace", "path": "/spec/containers/0/image", "value":"new image"}]'
 ```
 
 ### Options
@@ -70,6 +73,7 @@ kubectl patch pod valid-pod -p '{"spec":{"containers":[{"name":"kubernetes-serve
   -o, --output="": Output mode. Use "-o name" for shorter output (resource/name).
   -p, --patch="": The patch to be applied to the resource JSON file.
       --record[=false]: Record current kubectl command in the resource annotation.
+      --type="strategic": The type of patch being provided; one of [json merge strategic]
 ```
 
 ### Options inherited from parent commands
@@ -104,7 +108,7 @@ kubectl patch pod valid-pod -p '{"spec":{"containers":[{"name":"kubernetes-serve
 
 * [kubectl](kubectl.md)	 - kubectl controls the Kubernetes cluster manager
 
-###### Auto generated by spf13/cobra on 22-Jan-2016
+###### Auto generated by spf13/cobra on 12-Feb-2016
 
 <!-- BEGIN MUNGE: GENERATED_ANALYTICS -->
 [![Analytics](https://kubernetes-site.appspot.com/UA-36037335-10/GitHub/docs/user-guide/kubectl/kubectl_patch.md?pixel)]()

hack/test-cmd.sh

@@ -441,6 +441,14 @@ runTests() {
   kubectl patch "${kube_flags[@]}" pod valid-pod -p='{"spec":{"containers":[{"name": "kubernetes-serve-hostname", "image": "nginx"}]}}'
   # Post-condition: valid-pod POD has image nginx
   kube::test::get_object_assert pods "{{range.items}}{{$image_field}}:{{end}}" 'nginx:'
+  # prove that patch can use different types 
+  kubectl patch "${kube_flags[@]}" pod valid-pod --type="json" -p='[{"op": "replace", "path": "/spec/containers/0/image", "value":"nginx2"}]'
+  # Post-condition: valid-pod POD has image nginx
+  kube::test::get_object_assert pods "{{range.items}}{{$image_field}}:{{end}}" 'nginx2:'
+  # prove that patch can use different types 
+  kubectl patch "${kube_flags[@]}" pod valid-pod --type="json" -p='[{"op": "replace", "path": "/spec/containers/0/image", "value":"nginx"}]'
+  # Post-condition: valid-pod POD has image nginx
+  kube::test::get_object_assert pods "{{range.items}}{{$image_field}}:{{end}}" 'nginx:'
   # prove that yaml input works too
   YAML_PATCH=$'spec:\n  containers:\n  - name: kubernetes-serve-hostname\n    image: changed-with-yaml\n'
   kubectl patch "${kube_flags[@]}" pod valid-pod -p="${YAML_PATCH}"

pkg/kubectl/cmd/patch.go

@@ -19,6 +19,7 @@ package cmd
 import (
 	"fmt"
 	"io"
+	"strings"
 
 	"github.com/spf13/cobra"
 
@@ -26,9 +27,12 @@ import (
 	"k8s.io/kubernetes/pkg/kubectl"
 	cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
 	"k8s.io/kubernetes/pkg/kubectl/resource"
+	"k8s.io/kubernetes/pkg/util/sets"
 	"k8s.io/kubernetes/pkg/util/yaml"
 )
 
+var patchTypes = map[string]api.PatchType{"json": api.JSONPatchType, "merge": api.MergePatchType, "strategic": api.StrategicMergePatchType}
+
 // PatchOptions is the start of the data required to perform the operation.  As new fields are added, add them here instead of
 // referencing the cmd.Flags()
 type PatchOptions struct {
@@ -49,7 +53,10 @@ kubectl patch node k8s-node-1 -p '{"spec":{"unschedulable":true}}'
 kubectl patch -f node.json -p '{"spec":{"unschedulable":true}}'
 
 # Update a container's image; spec.containers[*].name is required because it's a merge key
-kubectl patch pod valid-pod -p '{"spec":{"containers":[{"name":"kubernetes-serve-hostname","image":"new image"}]}}'`
+kubectl patch pod valid-pod -p '{"spec":{"containers":[{"name":"kubernetes-serve-hostname","image":"new image"}]}}'
+
+# Update a container's image using a json patch with positional arrays
+kubectl patch pod valid-pod -type='json' -p='[{"op": "replace", "path": "/spec/containers/0/image", "value":"new image"}]'`
 )
 
 func NewCmdPatch(f *cmdutil.Factory, out io.Writer) *cobra.Command {
@@ -69,6 +76,7 @@ func NewCmdPatch(f *cmdutil.Factory, out io.Writer) *cobra.Command {
 	}
 	cmd.Flags().StringP("patch", "p", "", "The patch to be applied to the resource JSON file.")
 	cmd.MarkFlagRequired("patch")
+	cmd.Flags().String("type", "strategic", fmt.Sprintf("The type of patch being provided; one of %v", sets.StringKeySet(patchTypes).List()))
 	cmdutil.AddOutputFlagsForMutation(cmd)
 	cmdutil.AddRecordFlag(cmd)
 
@@ -83,6 +91,16 @@ func RunPatch(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []stri
 		return err
 	}
 
+	patchType := api.StrategicMergePatchType
+	patchTypeString := strings.ToLower(cmdutil.GetFlagString(cmd, "type"))
+	if len(patchTypeString) != 0 {
+		ok := false
+		patchType, ok = patchTypes[patchTypeString]
+		if !ok {
+			return cmdutil.UsageError(cmd, fmt.Sprintf("--type must be one of %v, not %q", sets.StringKeySet(patchTypes).List(), patchTypeString))
+		}
+	}
+
 	patch := cmdutil.GetFlagString(cmd, "patch")
 	if len(patch) == 0 {
 		return cmdutil.UsageError(cmd, "Must specify -p to patch")
@@ -121,7 +139,7 @@ func RunPatch(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []stri
 	}
 
 	helper := resource.NewHelper(client, mapping)
-	_, err = helper.Patch(namespace, name, api.StrategicMergePatchType, patchBytes)
+	_, err = helper.Patch(namespace, name, patchType, patchBytes)
 	if err != nil {
 		return err
 	}