package command import ( "fmt" "log" "strings" "github.com/hashicorp/terraform/state" "github.com/hashicorp/terraform/terraform" ) // 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, false) var allowMissing bool var module string cmdFlags := c.Meta.flagSet("taint") cmdFlags.BoolVar(&allowMissing, "allow-missing", false, "module") cmdFlags.StringVar(&module, "module", "", "module") cmdFlags.StringVar(&c.Meta.statePath, "state", DefaultStateFilename, "path") cmdFlags.StringVar(&c.Meta.stateOutPath, "state-out", "", "path") cmdFlags.StringVar(&c.Meta.backupPath, "backup", "", "path") cmdFlags.BoolVar(&c.Meta.lockState, "state-lock", true, "lock state") cmdFlags.Usage = func() { c.Ui.Error(c.Help()) } if err := cmdFlags.Parse(args); err != nil { return 1 } // 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 } name := args[0] if module == "" { module = "root" } else { module = "root." + module } rsk, err := terraform.ParseResourceStateKey(name) if err != nil { c.Ui.Error(fmt.Sprintf("Failed to parse resource name: %s", err)) return 1 } if !rsk.Mode.Taintable() { c.Ui.Error(fmt.Sprintf("Resource '%s' cannot be tainted", name)) return 1 } // Load the backend b, err := c.Backend(nil) if err != nil { c.Ui.Error(fmt.Sprintf("Failed to load backend: %s", err)) return 1 } // Get the state st, err := b.State() if err != nil { c.Ui.Error(fmt.Sprintf("Failed to load state: %s", err)) return 1 } if s, ok := st.(state.Locker); c.Meta.lockState && ok { if err := s.Lock("taint"); err != nil { c.Ui.Error(fmt.Sprintf("Failed to lock state: %s", err)) return 1 } defer s.Unlock() } // Get the actual state structure s := st.State() if s.Empty() { if allowMissing { return c.allowMissingExit(name, module) } c.Ui.Error(fmt.Sprintf( "The state is empty. The most common reason for this is that\n" + "an invalid state file path was given or Terraform has never\n " + "been run for this infrastructure. Infrastructure must exist\n" + "for it to be tainted.")) return 1 } // Get the proper module we want to taint modPath := strings.Split(module, ".") mod := s.ModuleByPath(modPath) if mod == nil { if allowMissing { return c.allowMissingExit(name, module) } c.Ui.Error(fmt.Sprintf( "The module %s could not be found. There is nothing to taint.", module)) return 1 } // If there are no resources in this module, it is an error if len(mod.Resources) == 0 { if allowMissing { return c.allowMissingExit(name, module) } c.Ui.Error(fmt.Sprintf( "The module %s has no resources. There is nothing to taint.", module)) return 1 } // Get the resource we're looking for rs, ok := mod.Resources[name] if !ok { if allowMissing { return c.allowMissingExit(name, module) } c.Ui.Error(fmt.Sprintf( "The resource %s couldn't be found in the module %s.", name, module)) return 1 } // Taint the resource rs.Taint() log.Printf("[INFO] Writing state output to: %s", c.Meta.StateOutPath()) if err := st.WriteState(s); err != nil { c.Ui.Error(fmt.Sprintf("Error writing state file: %s", err)) return 1 } if err := st.PersistState(); err != nil { c.Ui.Error(fmt.Sprintf("Error writing state file: %s", err)) return 1 } c.Ui.Output(fmt.Sprintf( "The resource %s in the module %s has been marked as tainted!", name, module)) return 0 } func (c *TaintCommand) Help() string { helpText := ` Usage: terraform taint [options] name Manually mark a resource as tainted, forcing a destroy and recreate on the next plan/apply. This will not modify your infrastructure. This command changes your state to mark a resource as tainted so that during the next plan or apply, that resource will be destroyed and recreated. This command on its own will not modify infrastructure. This command can be undone by reverting the state backup file that is created. 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-state=true Lock the state file when locking is supported. -module=path The module path where the resource lives. By default this will be root. Child modules can be specified by names. Ex. "consul" or "consul.vpc" (nested modules). -no-color If specified, output won't contain any color. -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. ` return strings.TrimSpace(helpText) } func (c *TaintCommand) Synopsis() string { return "Manually mark a resource for recreation" } func (c *TaintCommand) allowMissingExit(name, module string) int { c.Ui.Output(fmt.Sprintf( "The resource %s in the module %s was not found, but\n"+ "-allow-missing is set, so we're exiting successfully.", name, module)) return 0 }