mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-22 04:50:23 +00:00
311 lines
10 KiB
Go
311 lines
10 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"
|
|
|
|
"k8s.io/apimachinery/pkg/api/meta"
|
|
"k8s.io/apimachinery/pkg/runtime"
|
|
"k8s.io/apimachinery/pkg/runtime/schema"
|
|
scheme "k8s.io/kubernetes/pkg/api/legacyscheme"
|
|
api "k8s.io/kubernetes/pkg/apis/core"
|
|
"k8s.io/kubernetes/pkg/kubectl/cmd/templates"
|
|
cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
|
|
"k8s.io/kubernetes/pkg/kubectl/genericclioptions"
|
|
"k8s.io/kubernetes/pkg/kubectl/genericclioptions/printers"
|
|
"k8s.io/kubernetes/pkg/kubectl/genericclioptions/resource"
|
|
"k8s.io/kubernetes/pkg/kubectl/util/i18n"
|
|
|
|
"github.com/golang/glog"
|
|
"github.com/spf13/cobra"
|
|
)
|
|
|
|
var (
|
|
convert_long = templates.LongDesc(i18n.T(`
|
|
Convert config files between different API versions. Both YAML
|
|
and JSON formats are accepted.
|
|
|
|
The command takes filename, directory, or URL as input, and convert it into format
|
|
of version specified by --output-version flag. If target version is not specified or
|
|
not supported, convert to latest version.
|
|
|
|
The default output will be printed to stdout in YAML format. One can use -o option
|
|
to change to output destination.`))
|
|
|
|
convert_example = templates.Examples(i18n.T(`
|
|
# Convert 'pod.yaml' to latest version and print to stdout.
|
|
kubectl convert -f pod.yaml
|
|
|
|
# Convert the live state of the resource specified by 'pod.yaml' to the latest version
|
|
# and print to stdout in JSON format.
|
|
kubectl convert -f pod.yaml --local -o json
|
|
|
|
# Convert all files under current directory to latest version and create them all.
|
|
kubectl convert -f . | kubectl create -f -`))
|
|
)
|
|
|
|
// NewCmdConvert creates a command object for the generic "convert" action, which
|
|
// translates the config file into a given version.
|
|
func NewCmdConvert(f cmdutil.Factory, ioStreams genericclioptions.IOStreams) *cobra.Command {
|
|
options := NewConvertOptions(ioStreams)
|
|
|
|
cmd := &cobra.Command{
|
|
Use: "convert -f FILENAME",
|
|
DisableFlagsInUseLine: true,
|
|
Short: i18n.T("Convert config files between different API versions"),
|
|
Long: convert_long,
|
|
Example: convert_example,
|
|
Run: func(cmd *cobra.Command, args []string) {
|
|
cmdutil.CheckErr(options.Complete(f, cmd))
|
|
cmdutil.CheckErr(options.RunConvert())
|
|
},
|
|
}
|
|
|
|
options.PrintFlags.AddFlags(cmd)
|
|
|
|
usage := "to need to get converted."
|
|
cmdutil.AddFilenameOptionFlags(cmd, &options.FilenameOptions, usage)
|
|
cmd.MarkFlagRequired("filename")
|
|
cmdutil.AddValidateFlags(cmd)
|
|
cmd.Flags().BoolVar(&options.local, "local", options.local, "If true, convert will NOT try to contact api-server but run locally.")
|
|
cmd.Flags().String("output-version", "", i18n.T("Output the formatted object with the given group version (for ex: 'extensions/v1beta1').)"))
|
|
return cmd
|
|
}
|
|
|
|
// ConvertOptions have the data required to perform the convert operation
|
|
type ConvertOptions struct {
|
|
PrintFlags *genericclioptions.PrintFlags
|
|
PrintObj printers.ResourcePrinterFunc
|
|
|
|
resource.FilenameOptions
|
|
|
|
builder *resource.Builder
|
|
local bool
|
|
|
|
genericclioptions.IOStreams
|
|
specifiedOutputVersion schema.GroupVersion
|
|
}
|
|
|
|
func NewConvertOptions(ioStreams genericclioptions.IOStreams) *ConvertOptions {
|
|
return &ConvertOptions{
|
|
PrintFlags: genericclioptions.NewPrintFlags("converted").WithTypeSetter(scheme.Scheme).WithDefaultOutput("yaml"),
|
|
local: true,
|
|
IOStreams: ioStreams,
|
|
}
|
|
}
|
|
|
|
// outputVersion returns the preferred output version for generic content (JSON, YAML, or templates)
|
|
// defaultVersion is never mutated. Nil simply allows clean passing in common usage from client.Config
|
|
func outputVersion(cmd *cobra.Command) (schema.GroupVersion, error) {
|
|
outputVersionString := cmdutil.GetFlagString(cmd, "output-version")
|
|
if len(outputVersionString) == 0 {
|
|
return schema.GroupVersion{}, nil
|
|
}
|
|
|
|
return schema.ParseGroupVersion(outputVersionString)
|
|
}
|
|
|
|
// Complete collects information required to run Convert command from command line.
|
|
func (o *ConvertOptions) Complete(f cmdutil.Factory, cmd *cobra.Command) (err error) {
|
|
o.specifiedOutputVersion, err = outputVersion(cmd)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// build the builder
|
|
o.builder = f.NewBuilder().
|
|
WithScheme(scheme.Scheme).
|
|
LocalParam(o.local)
|
|
if !o.local {
|
|
schema, err := f.Validator(cmdutil.GetFlagBool(cmd, "validate"))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
o.builder.Schema(schema)
|
|
}
|
|
|
|
cmdNamespace, _, err := f.ToRawKubeConfigLoader().Namespace()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
o.builder.NamespaceParam(cmdNamespace).
|
|
ContinueOnError().
|
|
FilenameParam(false, &o.FilenameOptions).
|
|
Flatten()
|
|
|
|
// build the printer
|
|
printer, err := o.PrintFlags.ToPrinter()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
o.PrintObj = printer.PrintObj
|
|
return nil
|
|
}
|
|
|
|
// RunConvert implements the generic Convert command
|
|
func (o *ConvertOptions) RunConvert() error {
|
|
r := o.builder.Do()
|
|
err := r.Err()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
singleItemImplied := false
|
|
infos, err := r.IntoSingleItemImplied(&singleItemImplied).Infos()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if len(infos) == 0 {
|
|
return fmt.Errorf("no objects passed to convert")
|
|
}
|
|
|
|
objects, err := asVersionedObject(infos, !singleItemImplied, o.specifiedOutputVersion, cmdutil.InternalVersionJSONEncoder())
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if meta.IsListType(objects) {
|
|
obj, err := objectListToVersionedObject([]runtime.Object{objects}, o.specifiedOutputVersion)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return o.PrintObj(obj, o.Out)
|
|
}
|
|
|
|
return o.PrintObj(objects, o.Out)
|
|
}
|
|
|
|
// objectListToVersionedObject receives a list of api objects and a group version
|
|
// and squashes the list's items into a single versioned runtime.Object.
|
|
func objectListToVersionedObject(objects []runtime.Object, specifiedOutputVersion schema.GroupVersion) (runtime.Object, error) {
|
|
objectList := &api.List{Items: objects}
|
|
targetVersions := []schema.GroupVersion{}
|
|
if !specifiedOutputVersion.Empty() {
|
|
targetVersions = append(targetVersions, specifiedOutputVersion)
|
|
}
|
|
targetVersions = append(targetVersions, schema.GroupVersion{Group: "", Version: "v1"})
|
|
converted, err := tryConvert(scheme.Scheme, objectList, targetVersions...)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return converted, nil
|
|
}
|
|
|
|
// asVersionedObject converts a list of infos into a single object - either a List containing
|
|
// the objects as children, or if only a single Object is present, as that object. The provided
|
|
// version will be preferred as the conversion target, but the Object's mapping version will be
|
|
// used if that version is not present.
|
|
func asVersionedObject(infos []*resource.Info, forceList bool, specifiedOutputVersion schema.GroupVersion, encoder runtime.Encoder) (runtime.Object, error) {
|
|
objects, err := asVersionedObjects(infos, specifiedOutputVersion, encoder)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
var object runtime.Object
|
|
if len(objects) == 1 && !forceList {
|
|
object = objects[0]
|
|
} else {
|
|
object = &api.List{Items: objects}
|
|
targetVersions := []schema.GroupVersion{}
|
|
if !specifiedOutputVersion.Empty() {
|
|
targetVersions = append(targetVersions, specifiedOutputVersion)
|
|
}
|
|
targetVersions = append(targetVersions, schema.GroupVersion{Group: "", Version: "v1"})
|
|
|
|
converted, err := tryConvert(scheme.Scheme, object, targetVersions...)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
object = converted
|
|
}
|
|
|
|
actualVersion := object.GetObjectKind().GroupVersionKind()
|
|
if actualVersion.Version != specifiedOutputVersion.Version {
|
|
defaultVersionInfo := ""
|
|
if len(actualVersion.Version) > 0 {
|
|
defaultVersionInfo = fmt.Sprintf("Defaulting to %q", actualVersion.Version)
|
|
}
|
|
glog.V(1).Infof("info: the output version specified is invalid. %s\n", defaultVersionInfo)
|
|
}
|
|
return object, nil
|
|
}
|
|
|
|
// asVersionedObjects converts a list of infos into versioned objects. The provided
|
|
// version will be preferred as the conversion target, but the Object's mapping version will be
|
|
// used if that version is not present.
|
|
func asVersionedObjects(infos []*resource.Info, specifiedOutputVersion schema.GroupVersion, encoder runtime.Encoder) ([]runtime.Object, error) {
|
|
objects := []runtime.Object{}
|
|
for _, info := range infos {
|
|
if info.Object == nil {
|
|
continue
|
|
}
|
|
|
|
targetVersions := []schema.GroupVersion{}
|
|
// objects that are not part of api.Scheme must be converted to JSON
|
|
// TODO: convert to map[string]interface{}, attach to runtime.Unknown?
|
|
if !specifiedOutputVersion.Empty() {
|
|
if _, _, err := scheme.Scheme.ObjectKinds(info.Object); runtime.IsNotRegisteredError(err) {
|
|
// TODO: ideally this would encode to version, but we don't expose multiple codecs here.
|
|
data, err := runtime.Encode(encoder, info.Object)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
// TODO: Set ContentEncoding and ContentType.
|
|
objects = append(objects, &runtime.Unknown{Raw: data})
|
|
continue
|
|
}
|
|
targetVersions = append(targetVersions, specifiedOutputVersion)
|
|
} else {
|
|
gvks, _, err := scheme.Scheme.ObjectKinds(info.Object)
|
|
if err == nil {
|
|
for _, gvk := range gvks {
|
|
for _, version := range scheme.Scheme.PrioritizedVersionsForGroup(gvk.Group) {
|
|
targetVersions = append(targetVersions, version)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
converted, err := tryConvert(scheme.Scheme, info.Object, targetVersions...)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
objects = append(objects, converted)
|
|
}
|
|
return objects, nil
|
|
}
|
|
|
|
// tryConvert attempts to convert the given object to the provided versions in order. This function assumes
|
|
// the object is in internal version.
|
|
func tryConvert(converter runtime.ObjectConvertor, object runtime.Object, versions ...schema.GroupVersion) (runtime.Object, error) {
|
|
var last error
|
|
for _, version := range versions {
|
|
if version.Empty() {
|
|
return object, nil
|
|
}
|
|
obj, err := converter.ConvertToVersion(object, version)
|
|
if err != nil {
|
|
last = err
|
|
continue
|
|
}
|
|
return obj, nil
|
|
}
|
|
return nil, last
|
|
}
|