mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-27 08:40:23 +00:00
285 lines
9.1 KiB
Go
285 lines
9.1 KiB
Go
/*
|
|
Copyright 2014 The Kubernetes Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package cmd
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"reflect"
|
|
"strings"
|
|
|
|
jsonpatch "github.com/evanphx/json-patch"
|
|
"github.com/golang/glog"
|
|
"github.com/spf13/cobra"
|
|
|
|
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
|
|
"k8s.io/apimachinery/pkg/runtime"
|
|
"k8s.io/apimachinery/pkg/runtime/schema"
|
|
"k8s.io/apimachinery/pkg/types"
|
|
"k8s.io/apimachinery/pkg/util/json"
|
|
"k8s.io/apimachinery/pkg/util/sets"
|
|
"k8s.io/apimachinery/pkg/util/strategicpatch"
|
|
"k8s.io/apimachinery/pkg/util/yaml"
|
|
"k8s.io/kubernetes/pkg/kubectl"
|
|
"k8s.io/kubernetes/pkg/kubectl/cmd/templates"
|
|
cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
|
|
"k8s.io/kubernetes/pkg/kubectl/resource"
|
|
"k8s.io/kubernetes/pkg/kubectl/scheme"
|
|
"k8s.io/kubernetes/pkg/kubectl/util/i18n"
|
|
)
|
|
|
|
var patchTypes = map[string]types.PatchType{"json": types.JSONPatchType, "merge": types.MergePatchType, "strategic": types.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 {
|
|
resource.FilenameOptions
|
|
|
|
Local bool
|
|
|
|
OutputFormat string
|
|
}
|
|
|
|
var (
|
|
patchLong = templates.LongDesc(i18n.T(`
|
|
Update field(s) of a resource using strategic merge patch, a JSON merge patch, or a JSON patch.
|
|
|
|
JSON and YAML formats are accepted.
|
|
|
|
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.`))
|
|
|
|
patchExample = templates.Examples(i18n.T(`
|
|
# Partially update a node using a strategic merge patch. Specify the patch as JSON.
|
|
kubectl patch node k8s-node-1 -p '{"spec":{"unschedulable":true}}'
|
|
|
|
# Partially update a node using a strategic merge patch. Specify the patch as YAML.
|
|
kubectl patch node k8s-node-1 -p $'spec:\n unschedulable: true'
|
|
|
|
# Partially update a node identified by the type and name specified in "node.json" using strategic merge patch.
|
|
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"}]'`))
|
|
)
|
|
|
|
func NewCmdPatch(f cmdutil.Factory, out io.Writer) *cobra.Command {
|
|
options := &PatchOptions{}
|
|
validArgs := cmdutil.ValidArgList(f)
|
|
|
|
cmd := &cobra.Command{
|
|
Use: "patch (-f FILENAME | TYPE NAME) -p PATCH",
|
|
DisableFlagsInUseLine: true,
|
|
Short: i18n.T("Update field(s) of a resource using strategic merge patch"),
|
|
Long: patchLong,
|
|
Example: patchExample,
|
|
Run: func(cmd *cobra.Command, args []string) {
|
|
options.OutputFormat = cmdutil.GetFlagString(cmd, "output")
|
|
err := RunPatch(f, out, cmd, args, options)
|
|
cmdutil.CheckErr(err)
|
|
},
|
|
ValidArgs: validArgs,
|
|
ArgAliases: kubectl.ResourceAliases(validArgs),
|
|
}
|
|
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.AddPrinterFlags(cmd)
|
|
cmdutil.AddRecordFlag(cmd)
|
|
cmdutil.AddInclude3rdPartyFlags(cmd)
|
|
|
|
usage := "identifying the resource to update"
|
|
cmdutil.AddFilenameOptionFlags(cmd, &options.FilenameOptions, usage)
|
|
|
|
cmd.Flags().BoolVar(&options.Local, "local", options.Local, "If true, patch will operate on the content of the file, not the server-side resource.")
|
|
|
|
return cmd
|
|
}
|
|
|
|
func RunPatch(f cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []string, options *PatchOptions) error {
|
|
switch {
|
|
case options.Local && len(args) != 0:
|
|
return fmt.Errorf("cannot specify --local and server resources")
|
|
}
|
|
|
|
cmdNamespace, enforceNamespace, err := f.DefaultNamespace()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
patchType := types.StrategicMergePatchType
|
|
patchTypeString := strings.ToLower(cmdutil.GetFlagString(cmd, "type"))
|
|
if len(patchTypeString) != 0 {
|
|
ok := false
|
|
patchType, ok = patchTypes[patchTypeString]
|
|
if !ok {
|
|
return cmdutil.UsageErrorf(cmd, "--type must be one of %v, not %q",
|
|
sets.StringKeySet(patchTypes).List(), patchTypeString)
|
|
}
|
|
}
|
|
|
|
patch := cmdutil.GetFlagString(cmd, "patch")
|
|
if len(patch) == 0 {
|
|
return cmdutil.UsageErrorf(cmd, "Must specify -p to patch")
|
|
}
|
|
patchBytes, err := yaml.ToJSON([]byte(patch))
|
|
if err != nil {
|
|
return fmt.Errorf("unable to parse %q: %v", patch, err)
|
|
}
|
|
|
|
r := f.NewBuilder().
|
|
Unstructured().
|
|
ContinueOnError().
|
|
NamespaceParam(cmdNamespace).DefaultNamespace().
|
|
FilenameParam(enforceNamespace, &options.FilenameOptions).
|
|
ResourceTypeOrNameArgs(false, args...).
|
|
Flatten().
|
|
Do()
|
|
err = r.Err()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
count := 0
|
|
err = r.Visit(func(info *resource.Info, err error) error {
|
|
if err != nil {
|
|
return err
|
|
}
|
|
name, namespace := info.Name, info.Namespace
|
|
mapping := info.ResourceMapping()
|
|
client, err := f.UnstructuredClientForMapping(mapping)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if !options.Local {
|
|
dataChangedMsg := "not patched"
|
|
didPatch := false
|
|
helper := resource.NewHelper(client, mapping)
|
|
patchedObj, err := helper.Patch(namespace, name, patchType, patchBytes)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
// Record the change as a second patch to avoid trying to merge with a user's patch data
|
|
if cmdutil.ShouldRecord(cmd, info) {
|
|
// Copy the resource info and update with the result of applying the user's patch
|
|
infoCopy := *info
|
|
infoCopy.Object = patchedObj
|
|
if patch, patchType, err := cmdutil.ChangeResourcePatch(&infoCopy, f.Command(cmd, true)); err == nil {
|
|
if recordedObj, err := helper.Patch(info.Namespace, info.Name, patchType, patch); err != nil {
|
|
glog.V(4).Infof("error recording reason: %v", err)
|
|
} else {
|
|
patchedObj = recordedObj
|
|
}
|
|
}
|
|
}
|
|
count++
|
|
|
|
oldData, err := json.Marshal(info.Object)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
newData, err := json.Marshal(patchedObj)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if !reflect.DeepEqual(oldData, newData) {
|
|
didPatch = true
|
|
dataChangedMsg = "patched"
|
|
}
|
|
|
|
// After computing whether we changed data, refresh the resource info with the resulting object
|
|
if err := info.Refresh(patchedObj, true); err != nil {
|
|
return err
|
|
}
|
|
|
|
if len(options.OutputFormat) > 0 && options.OutputFormat != "name" {
|
|
return cmdutil.PrintObject(cmd, info.Object, out)
|
|
}
|
|
cmdutil.PrintSuccess(options.OutputFormat == "name", out, info.Object, false, dataChangedMsg)
|
|
|
|
// if object was not successfully patched, exit with error code 1
|
|
if !didPatch {
|
|
return cmdutil.ErrExit
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
count++
|
|
|
|
originalObjJS, err := runtime.Encode(unstructured.UnstructuredJSONScheme, info.Object)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
originalPatchedObjJS, err := getPatchedJSON(patchType, originalObjJS, patchBytes, mapping.GroupVersionKind, scheme.Scheme)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
targetObj, err := runtime.Decode(unstructured.UnstructuredJSONScheme, originalPatchedObjJS)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// TODO: if we ever want to go generic, this allows a clean -o yaml without trying to print columns or anything
|
|
// rawExtension := &runtime.Unknown{
|
|
// Raw: originalPatchedObjJS,
|
|
// }
|
|
if err := info.Refresh(targetObj, true); err != nil {
|
|
return err
|
|
}
|
|
return cmdutil.PrintObject(cmd, info.Object, out)
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if count == 0 {
|
|
return fmt.Errorf("no objects passed to patch")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func getPatchedJSON(patchType types.PatchType, originalJS, patchJS []byte, gvk schema.GroupVersionKind, creater runtime.ObjectCreater) ([]byte, error) {
|
|
switch patchType {
|
|
case types.JSONPatchType:
|
|
patchObj, err := jsonpatch.DecodePatch(patchJS)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return patchObj.Apply(originalJS)
|
|
|
|
case types.MergePatchType:
|
|
return jsonpatch.MergePatch(originalJS, patchJS)
|
|
|
|
case types.StrategicMergePatchType:
|
|
// get a typed object for this GVK if we need to apply a strategic merge patch
|
|
obj, err := creater.New(gvk)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("cannot apply strategic merge patch for %s locally, try --type merge", gvk.String())
|
|
}
|
|
return strategicpatch.StrategicMergePatch(originalJS, patchJS, obj)
|
|
|
|
default:
|
|
// only here as a safety net - go-restful filters content-type
|
|
return nil, fmt.Errorf("unknown Content-Type header for patch: %v", patchType)
|
|
}
|
|
}
|