terraform/command/untaint.go

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package command
import (
"context"
"fmt"
"log"
"strings"
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"github.com/hashicorp/terraform/command/clistate"
)
// UntaintCommand is a cli.Command implementation that manually untaints
// a resource, marking it as primary and ready for service.
type UntaintCommand struct {
Meta
}
func (c *UntaintCommand) Run(args []string) int {
args, err := c.Meta.process(args, false)
if err != nil {
return 1
}
var allowMissing bool
var module string
cmdFlags := c.Meta.flagSet("untaint")
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")
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cmdFlags.BoolVar(&c.Meta.stateLock, "lock", true, "lock state")
cmdFlags.DurationVar(&c.Meta.stateLockTimeout, "lock-timeout", 0, "lock timeout")
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 untaint
args = cmdFlags.Args()
if len(args) != 1 {
c.Ui.Error("The untaint command expects exactly one argument.")
cmdFlags.Usage()
return 1
}
name := args[0]
if module == "" {
module = "root"
} else {
module = "root." + module
}
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// Load the backend
b, backendDiags := c.Backend(nil)
if backendDiags.HasErrors() {
c.showDiagnostics(backendDiags)
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return 1
}
// Get the state
env := c.Workspace()
st, err := b.State(env)
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(st, "untaint"); err != nil {
c.Ui.Error(fmt.Sprintf("Error locking state: %s", err))
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return 1
}
defer stateLocker.Unlock(nil)
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}
if err := st.RefreshState(); err != nil {
c.Ui.Error(fmt.Sprintf("Failed to load state: %s", err))
return 1
}
// Get the actual state structure
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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 untainted."))
return 1
}
// Get the proper module holding the resource we want to untaint
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 untaint.",
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 untaint.",
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
}
// Untaint the resource
rs.Untaint()
log.Printf("[INFO] Writing state output to: %s", c.Meta.StateOutPath())
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if err := st.WriteState(s); err != nil {
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c.Ui.Error(fmt.Sprintf("Error writing state file: %s", err))
return 1
}
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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 successfully untainted!",
name, module))
return 0
}
func (c *UntaintCommand) Help() string {
helpText := `
Usage: terraform untaint [options] name
Manually unmark a resource as tainted, restoring it as the primary
instance in the state. This reverses either a manual 'terraform taint'
or the result of provisioners failing on a resource.
This will not modify your infrastructure. This command changes your
state to unmark a resource as tainted. This command can be undone by
reverting the state backup file that is created, or by running
'terraform taint' on the resource.
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.
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-lock=true Lock the state file when locking is supported.
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-lock-timeout=0s Duration to retry a state lock.
-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 *UntaintCommand) Synopsis() string {
return "Manually unmark a resource as tainted"
}
func (c *UntaintCommand) 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
}