package command import ( "context" "fmt" "os" "strings" "github.com/hashicorp/terraform/addrs" "github.com/hashicorp/terraform/command/clistate" "github.com/hashicorp/terraform/states" "github.com/hashicorp/terraform/terraform" "github.com/hashicorp/terraform/tfdiags" ) // TaintCommand is a cli.Command implementation that manually taints // a resource, marking it for recreation. type TaintCommand struct { Meta } func (c *TaintCommand) Run(args []string) int { args = c.Meta.process(args) var module string var allowMissing bool cmdFlags := c.Meta.ignoreRemoteVersionFlagSet("taint") cmdFlags.BoolVar(&allowMissing, "allow-missing", false, "module") cmdFlags.StringVar(&c.Meta.backupPath, "backup", "", "path") cmdFlags.BoolVar(&c.Meta.stateLock, "lock", true, "lock state") cmdFlags.DurationVar(&c.Meta.stateLockTimeout, "lock-timeout", 0, "lock timeout") cmdFlags.StringVar(&module, "module", "", "module") cmdFlags.StringVar(&c.Meta.statePath, "state", "", "path") cmdFlags.StringVar(&c.Meta.stateOutPath, "state-out", "", "path") cmdFlags.Usage = func() { c.Ui.Error(c.Help()) } if err := cmdFlags.Parse(args); err != nil { c.Ui.Error(fmt.Sprintf("Error parsing command-line flags: %s\n", err.Error())) return 1 } var diags tfdiags.Diagnostics // Require the one argument for the resource to taint args = cmdFlags.Args() if len(args) != 1 { c.Ui.Error("The taint command expects exactly one argument.") cmdFlags.Usage() return 1 } if module != "" { c.Ui.Error("The -module option is no longer used. Instead, include the module path in the main resource address, like \"module.foo.module.bar.null_resource.baz\".") return 1 } addr, addrDiags := addrs.ParseAbsResourceInstanceStr(args[0]) diags = diags.Append(addrDiags) if addrDiags.HasErrors() { c.showDiagnostics(diags) return 1 } if addr.Resource.Resource.Mode != addrs.ManagedResourceMode { c.Ui.Error(fmt.Sprintf("Resource instance %s cannot be tainted", addr)) return 1 } // Load the config and check the core version requirements are satisfied loader, err := c.initConfigLoader() if err != nil { diags = diags.Append(err) c.showDiagnostics(diags) return 1 } pwd, err := os.Getwd() if err != nil { c.Ui.Error(fmt.Sprintf("Error getting pwd: %s", err)) return 1 } config, configDiags := loader.LoadConfig(pwd) diags = diags.Append(configDiags) if diags.HasErrors() { c.showDiagnostics(diags) return 1 } versionDiags := terraform.CheckCoreVersionRequirements(config) diags = diags.Append(versionDiags) if diags.HasErrors() { c.showDiagnostics(diags) return 1 } // Load the backend b, backendDiags := c.Backend(nil) diags = diags.Append(backendDiags) if backendDiags.HasErrors() { c.showDiagnostics(diags) return 1 } // Determine the workspace name workspace, err := c.Workspace() if err != nil { c.Ui.Error(fmt.Sprintf("Error selecting workspace: %s", err)) return 1 } // Check remote Terraform version is compatible remoteVersionDiags := c.remoteBackendVersionCheck(b, workspace) diags = diags.Append(remoteVersionDiags) c.showDiagnostics(diags) if diags.HasErrors() { return 1 } // Get the state stateMgr, err := b.StateMgr(workspace) if err != nil { c.Ui.Error(fmt.Sprintf("Failed to load state: %s", err)) return 1 } if c.stateLock { stateLocker := clistate.NewLocker(context.Background(), c.stateLockTimeout, c.Ui, c.Colorize()) if err := stateLocker.Lock(stateMgr, "taint"); err != nil { c.Ui.Error(fmt.Sprintf("Error locking state: %s", err)) return 1 } defer stateLocker.Unlock(nil) } if err := stateMgr.RefreshState(); err != nil { c.Ui.Error(fmt.Sprintf("Failed to load state: %s", err)) return 1 } // Get the actual state structure state := stateMgr.State() if state.Empty() { if allowMissing { return c.allowMissingExit(addr) } diags = diags.Append(tfdiags.Sourceless( tfdiags.Error, "No such resource instance", "The state currently contains no resource instances whatsoever. This may occur if the configuration has never been applied or if it has recently been destroyed.", )) c.showDiagnostics(diags) return 1 } ss := state.SyncWrapper() // Get the resource and instance we're going to taint rs := ss.Resource(addr.ContainingResource()) is := ss.ResourceInstance(addr) if is == nil { if allowMissing { return c.allowMissingExit(addr) } diags = diags.Append(tfdiags.Sourceless( tfdiags.Error, "No such resource instance", fmt.Sprintf("There is no resource instance in the state with the address %s. If the resource configuration has just been added, you must run \"terraform apply\" once to create the corresponding instance(s) before they can be tainted.", addr), )) c.showDiagnostics(diags) return 1 } obj := is.Current if obj == nil { if len(is.Deposed) != 0 { diags = diags.Append(tfdiags.Sourceless( tfdiags.Error, "No such resource instance", fmt.Sprintf("Resource instance %s is currently part-way through a create_before_destroy replacement action. Run \"terraform apply\" to complete its replacement before tainting it.", addr), )) } else { // Don't know why we're here, but we'll produce a generic error message anyway. diags = diags.Append(tfdiags.Sourceless( tfdiags.Error, "No such resource instance", fmt.Sprintf("Resource instance %s does not currently have a remote object associated with it, so it cannot be tainted.", addr), )) } c.showDiagnostics(diags) return 1 } obj.Status = states.ObjectTainted ss.SetResourceInstanceCurrent(addr, obj, rs.ProviderConfig) if err := stateMgr.WriteState(state); err != nil { c.Ui.Error(fmt.Sprintf("Error writing state file: %s", err)) return 1 } if err := stateMgr.PersistState(); err != nil { c.Ui.Error(fmt.Sprintf("Error writing state file: %s", err)) return 1 } c.Ui.Output(fmt.Sprintf("Resource instance %s has been marked as tainted.", addr)) return 0 } func (c *TaintCommand) Help() string { helpText := ` Usage: terraform taint [options]
Terraform uses the term "tainted" to describe a resource instance which may not be fully functional, either because its creation partially failed or because you've manually marked it as such using this command. This will not modify your infrastructure directly, but subsequent Terraform plans will include actions to destroy the remote object and create a new object to replace it. You can remove the "taint" state from a resource instance using the "terraform untaint" command. The address is in the usual resource address syntax, such as: aws_instance.foo aws_instance.bar[1] module.foo.module.bar.aws_instance.baz Use your shell's quoting or escaping syntax to ensure that the address will reach Terraform correctly, without any special interpretation. Options: -allow-missing If specified, the command will succeed (exit code 0) even if the resource is missing. -backup=path Path to backup the existing state file before modifying. Defaults to the "-state-out" path with ".backup" extension. Set to "-" to disable backup. -lock=true Lock the state file when locking is supported. -lock-timeout=0s Duration to retry a state lock. -state=path Path to read and save state (unless state-out is specified). Defaults to "terraform.tfstate". -state-out=path Path to write updated state file. By default, the "-state" path will be used. -ignore-remote-version Continue even if remote and local Terraform versions differ. This may result in an unusable workspace, and should be used with extreme caution. ` return strings.TrimSpace(helpText) } func (c *TaintCommand) Synopsis() string { return "Mark a resource instance as not fully functional" } func (c *TaintCommand) allowMissingExit(name addrs.AbsResourceInstance) int { c.showDiagnostics(tfdiags.Sourceless( tfdiags.Warning, "No such resource instance", "Resource instance %s was not found, but this is not an error because -allow-missing was set.", )) return 0 }