mirror of https://github.com/k3s-io/k3s
141 lines
4.0 KiB
Go
141 lines
4.0 KiB
Go
/*
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Copyright 2016 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 rollout
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import (
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"io"
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"github.com/renstrom/dedent"
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"k8s.io/kubernetes/pkg/api/meta"
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"k8s.io/kubernetes/pkg/kubectl"
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cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
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"k8s.io/kubernetes/pkg/kubectl/resource"
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"k8s.io/kubernetes/pkg/runtime"
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utilerrors "k8s.io/kubernetes/pkg/util/errors"
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"github.com/spf13/cobra"
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)
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// UndoOptions is the start of the data required to perform the operation. As new fields are added, add them here instead of
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// referencing the cmd.Flags()
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type UndoOptions struct {
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Rollbackers []kubectl.Rollbacker
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Mapper meta.RESTMapper
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Typer runtime.ObjectTyper
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Infos []*resource.Info
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ToRevision int64
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Out io.Writer
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Filenames []string
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Recursive bool
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}
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var (
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undo_long = dedent.Dedent(`
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Rollback to a previous rollout.`)
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undo_example = dedent.Dedent(`
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# Rollback to the previous deployment
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kubectl rollout undo deployment/abc
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# Rollback to deployment revision 3
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kubectl rollout undo deployment/abc --to-revision=3`)
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)
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func NewCmdRolloutUndo(f *cmdutil.Factory, out io.Writer) *cobra.Command {
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opts := &UndoOptions{}
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cmd := &cobra.Command{
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Use: "undo (TYPE NAME | TYPE/NAME) [flags]",
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Short: "undoes a previous rollout",
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Long: undo_long,
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Example: undo_example,
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Run: func(cmd *cobra.Command, args []string) {
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allErrs := []error{}
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err := opts.CompleteUndo(f, cmd, out, args)
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if err != nil {
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allErrs = append(allErrs, err)
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}
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err = opts.RunUndo()
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if err != nil {
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allErrs = append(allErrs, err)
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}
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cmdutil.CheckErr(utilerrors.Flatten(utilerrors.NewAggregate(allErrs)))
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},
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}
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cmd.Flags().Int64("to-revision", 0, "The revision to rollback to. Default to 0 (last revision).")
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usage := "Filename, directory, or URL to a file identifying the resource to get from a server."
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kubectl.AddJsonFilenameFlag(cmd, &opts.Filenames, usage)
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cmdutil.AddRecursiveFlag(cmd, &opts.Recursive)
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return cmd
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}
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func (o *UndoOptions) CompleteUndo(f *cmdutil.Factory, cmd *cobra.Command, out io.Writer, args []string) error {
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if len(args) == 0 && len(o.Filenames) == 0 {
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return cmdutil.UsageError(cmd, "Required resource not specified.")
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}
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o.ToRevision = cmdutil.GetFlagInt64(cmd, "to-revision")
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o.Mapper, o.Typer = f.Object(false)
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o.Out = out
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cmdNamespace, enforceNamespace, err := f.DefaultNamespace()
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if err != nil {
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return err
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}
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r := resource.NewBuilder(o.Mapper, o.Typer, resource.ClientMapperFunc(f.ClientForMapping), f.Decoder(true)).
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NamespaceParam(cmdNamespace).DefaultNamespace().
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FilenameParam(enforceNamespace, o.Recursive, o.Filenames...).
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ResourceTypeOrNameArgs(true, args...).
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ContinueOnError().
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Latest().
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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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err = r.Visit(func(info *resource.Info, err error) error {
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if err != nil {
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return err
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}
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rollbacker, err := f.Rollbacker(info.ResourceMapping())
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if err != nil {
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return err
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}
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o.Infos = append(o.Infos, info)
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o.Rollbackers = append(o.Rollbackers, rollbacker)
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return nil
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})
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return err
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}
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func (o *UndoOptions) RunUndo() error {
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allErrs := []error{}
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for ix, info := range o.Infos {
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result, err := o.Rollbackers[ix].Rollback(info.Namespace, info.Name, nil, o.ToRevision, info.Object)
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if err != nil {
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allErrs = append(allErrs, cmdutil.AddSourceToErr("undoing", info.Source, err))
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continue
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}
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cmdutil.PrintSuccess(o.Mapper, false, o.Out, info.Mapping.Resource, info.Name, result)
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}
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return utilerrors.NewAggregate(allErrs)
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}
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