github.com/canthefason/helm@v2.2.1-0.20170221172616-16b043b8d505+incompatible/cmd/helm/rollback.go (about) 1 /* 2 Copyright 2016 The Kubernetes Authors All rights reserved. 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'. 35 ` 36 37 type rollbackCmd struct { 38 name string 39 revision int32 40 dryRun bool 41 recreate bool 42 disableHooks bool 43 out io.Writer 44 client helm.Interface 45 timeout int64 46 wait bool 47 } 48 49 func newRollbackCmd(c helm.Interface, out io.Writer) *cobra.Command { 50 rollback := &rollbackCmd{ 51 out: out, 52 client: c, 53 } 54 55 cmd := &cobra.Command{ 56 Use: "rollback [flags] [RELEASE] [REVISION]", 57 Short: "roll back a release to a previous revision", 58 Long: rollbackDesc, 59 PersistentPreRunE: setupConnection, 60 RunE: func(cmd *cobra.Command, args []string) error { 61 if err := checkArgsLength(len(args), "release name", "revision number"); err != nil { 62 return err 63 } 64 65 rollback.name = args[0] 66 67 v64, err := strconv.ParseInt(args[1], 10, 32) 68 if err != nil { 69 return fmt.Errorf("invalid revision number '%q': %s", args[1], err) 70 } 71 72 rollback.revision = int32(v64) 73 rollback.client = ensureHelmClient(rollback.client) 74 return rollback.run() 75 }, 76 } 77 78 f := cmd.Flags() 79 f.BoolVar(&rollback.dryRun, "dry-run", false, "simulate a rollback") 80 f.BoolVar(&rollback.recreate, "recreate-pods", false, "performs pods restart for the resource if applicable") 81 f.BoolVar(&rollback.disableHooks, "no-hooks", false, "prevent hooks from running during rollback") 82 f.Int64Var(&rollback.timeout, "timeout", 300, "time in seconds to wait for any individual kubernetes operation (like Jobs for hooks)") 83 f.BoolVar(&rollback.wait, "wait", false, "if set, will wait until all Pods, PVCs, and Services are in a ready state before marking the release as successful. It will wait for as long as --timeout") 84 85 return cmd 86 } 87 88 func (r *rollbackCmd) run() error { 89 _, err := r.client.RollbackRelease( 90 r.name, 91 helm.RollbackDryRun(r.dryRun), 92 helm.RollbackRecreate(r.recreate), 93 helm.RollbackDisableHooks(r.disableHooks), 94 helm.RollbackVersion(r.revision), 95 helm.RollbackTimeout(r.timeout), 96 helm.RollbackWait(r.wait)) 97 if err != nil { 98 return prettyError(err) 99 } 100 101 fmt.Fprintf(r.out, "Rollback was a success! Happy Helming!\n") 102 103 return nil 104 }