github.com/latiif/helm@v2.15.0+incompatible/cmd/helm/rollback.go (about)

     1  /*
     2  Copyright The Helm Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package main
    18  
    19  import (
    20  	"fmt"
    21  	"io"
    22  	"strconv"
    23  
    24  	"github.com/spf13/cobra"
    25  
    26  	"k8s.io/helm/pkg/helm"
    27  )
    28  
    29  const rollbackDesc = `
    30  This command rolls back a release to a previous revision.
    31  
    32  The first argument of the rollback command is the name of a release, and the
    33  second is a revision (version) number. To see revision numbers, run
    34  'helm history RELEASE'. If you'd like to rollback to the previous release use
    35  'helm rollback [RELEASE] 0'.
    36  `
    37  
    38  type rollbackCmd struct {
    39  	name          string
    40  	revision      int32
    41  	dryRun        bool
    42  	recreate      bool
    43  	force         bool
    44  	disableHooks  bool
    45  	out           io.Writer
    46  	client        helm.Interface
    47  	timeout       int64
    48  	wait          bool
    49  	description   string
    50  	cleanupOnFail bool
    51  }
    52  
    53  func newRollbackCmd(c helm.Interface, out io.Writer) *cobra.Command {
    54  	rollback := &rollbackCmd{
    55  		out:    out,
    56  		client: c,
    57  	}
    58  
    59  	cmd := &cobra.Command{
    60  		Use:     "rollback [flags] [RELEASE] [REVISION]",
    61  		Short:   "Rollback a release to a previous revision",
    62  		Long:    rollbackDesc,
    63  		PreRunE: func(_ *cobra.Command, _ []string) error { return setupConnection() },
    64  		RunE: func(cmd *cobra.Command, args []string) error {
    65  			if err := checkArgsLength(len(args), "release name", "revision number"); err != nil {
    66  				return err
    67  			}
    68  
    69  			rollback.name = args[0]
    70  
    71  			v64, err := strconv.ParseInt(args[1], 10, 32)
    72  			if err != nil {
    73  				return fmt.Errorf("invalid revision number '%q': %s", args[1], err)
    74  			}
    75  
    76  			rollback.revision = int32(v64)
    77  			rollback.client = ensureHelmClient(rollback.client)
    78  			return rollback.run()
    79  		},
    80  	}
    81  
    82  	f := cmd.Flags()
    83  	settings.AddFlagsTLS(f)
    84  	f.BoolVar(&rollback.dryRun, "dry-run", false, "Simulate a rollback")
    85  	f.BoolVar(&rollback.recreate, "recreate-pods", false, "Performs pods restart for the resource if applicable")
    86  	f.BoolVar(&rollback.force, "force", false, "Force resource update through delete/recreate if needed")
    87  	f.BoolVar(&rollback.disableHooks, "no-hooks", false, "Prevent hooks from running during rollback")
    88  	f.Int64Var(&rollback.timeout, "timeout", 300, "Time in seconds to wait for any individual Kubernetes operation (like Jobs for hooks)")
    89  	f.BoolVar(&rollback.wait, "wait", false, "If set, will wait until all Pods, PVCs, Services, and minimum number of Pods of a Deployment are in a ready state before marking the release as successful. It will wait for as long as --timeout")
    90  	f.StringVar(&rollback.description, "description", "", "Specify a description for the release")
    91  	f.BoolVar(&rollback.cleanupOnFail, "cleanup-on-fail", false, "Allow deletion of new resources created in this rollback when rollback failed")
    92  
    93  	// set defaults from environment
    94  	settings.InitTLS(f)
    95  
    96  	return cmd
    97  }
    98  
    99  func (r *rollbackCmd) run() error {
   100  	_, err := r.client.RollbackRelease(
   101  		r.name,
   102  		helm.RollbackDryRun(r.dryRun),
   103  		helm.RollbackRecreate(r.recreate),
   104  		helm.RollbackForce(r.force),
   105  		helm.RollbackDisableHooks(r.disableHooks),
   106  		helm.RollbackVersion(r.revision),
   107  		helm.RollbackTimeout(r.timeout),
   108  		helm.RollbackWait(r.wait),
   109  		helm.RollbackDescription(r.description),
   110  		helm.RollbackCleanupOnFail(r.cleanupOnFail))
   111  	if err != nil {
   112  		return prettyError(err)
   113  	}
   114  
   115  	fmt.Fprintf(r.out, "Rollback was a success.\n")
   116  
   117  	return nil
   118  }