Merge pull request #12347 from hashicorp/b-env-migrate

command: migrating envs when changing backends
This commit is contained in:
Mitchell Hashimoto 2017-03-01 12:58:40 -08:00 committed by GitHub
commit bdde7d845a
22 changed files with 870 additions and 147 deletions

View File

@ -13,9 +13,13 @@ import (
"github.com/hashicorp/terraform/terraform"
)
// This is the name of the default, initial state that every backend
// must have. This state cannot be deleted.
const DefaultStateName = "default"
// Error value to return when a named state operation isn't supported
// Error value to return when a named state operation isn't supported.
// This must be returned rather than a custom error so that the Terraform
// CLI can detect it and handle it appropriately.
var ErrNamedStatesNotSupported = errors.New("named states not supported")
// Backend is the minimal interface that must be implemented to enable Terraform.

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@ -47,9 +47,13 @@ type Local struct {
//
// StateBackupPath is the local path where a backup file will be written.
// Set this to "-" to disable state backup.
//
// StateEnvPath is the path to the folder containing environments. This
// defaults to DefaultEnvDir if not set.
StatePath string
StateOutPath string
StateBackupPath string
StateEnvDir string
// We only want to create a single instance of a local state, so store them
// here as they're loaded.
@ -266,6 +270,13 @@ func (b *Local) init() {
"path": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Default: "",
},
"environment_dir": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Default: "",
},
},
@ -288,6 +299,13 @@ func (b *Local) schemaConfigure(ctx context.Context) error {
b.StateOutPath = path
}
if raw, ok := d.GetOk("environment_dir"); ok {
path := raw.(string)
if path != "" {
b.StateEnvDir = path
}
}
return nil
}
@ -302,12 +320,17 @@ func (b *Local) StatePaths(name string) (string, string, string) {
name = backend.DefaultStateName
}
envDir := DefaultEnvDir
if b.StateEnvDir != "" {
envDir = b.StateEnvDir
}
if name == backend.DefaultStateName {
if statePath == "" {
statePath = DefaultStateFilename
}
} else {
statePath = filepath.Join(DefaultEnvDir, name, DefaultStateFilename)
statePath = filepath.Join(envDir, name, DefaultStateFilename)
}
if stateOutPath == "" {
@ -330,7 +353,12 @@ func (b *Local) createState(name string) error {
return nil
}
stateDir := filepath.Join(DefaultEnvDir, name)
envDir := DefaultEnvDir
if b.StateEnvDir != "" {
envDir = b.StateEnvDir
}
stateDir := filepath.Join(envDir, name)
s, err := os.Stat(stateDir)
if err == nil && s.IsDir() {
// no need to check for os.IsNotExist, since that is covered by os.MkdirAll

View File

@ -5,6 +5,8 @@ import (
"path/filepath"
"testing"
"github.com/hashicorp/terraform/backend"
"github.com/hashicorp/terraform/state"
"github.com/hashicorp/terraform/terraform"
)
@ -56,6 +58,38 @@ func TestLocalProvider(t *testing.T, b *Local, name string) *terraform.MockResou
return p
}
// TestNewLocalSingle is a factory for creating a TestLocalSingleState.
// This function matches the signature required for backend/init.
func TestNewLocalSingle() backend.Backend {
return &TestLocalSingleState{}
}
// TestLocalSingleState is a backend implementation that wraps Local
// and modifies it to only support single states (returns
// ErrNamedStatesNotSupported for multi-state operations).
//
// This isn't an actual use case, this is exported just to provide a
// easy way to test that behavior.
type TestLocalSingleState struct {
Local
}
func (b *TestLocalSingleState) State(name string) (state.State, error) {
if name != backend.DefaultStateName {
return nil, backend.ErrNamedStatesNotSupported
}
return b.Local.State(name)
}
func (b *TestLocalSingleState) States() ([]string, error) {
return nil, backend.ErrNamedStatesNotSupported
}
func (b *TestLocalSingleState) DeleteState(string) error {
return backend.ErrNamedStatesNotSupported
}
func testTempDir(t *testing.T) string {
d, err := ioutil.TempDir("", "tf")
if err != nil {

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@ -449,6 +449,28 @@ func testInteractiveInput(t *testing.T, answers []string) func() {
}
}
// testInputMap configures tests so that the given answers are returned
// for calls to Input when the right question is asked. The key is the
// question "Id" that is used.
func testInputMap(t *testing.T, answers map[string]string) func() {
// Disable test mode so input is called
test = false
// Setup reader/writers
defaultInputReader = bytes.NewBufferString("")
defaultInputWriter = new(bytes.Buffer)
// Setup answers
testInputResponse = nil
testInputResponseMap = answers
// Return the cleanup
return func() {
test = true
testInputResponseMap = nil
}
}
// testBackendState is used to make a test HTTP server to test a configured
// backend. This returns the complete state that can be saved. Use
// `testStateFileRemote` to write the returned state.

View File

@ -646,38 +646,19 @@ func (m *Meta) backend_c_r_S(
return nil, fmt.Errorf(strings.TrimSpace(errBackendLocalRead), err)
}
env := m.Env()
localState, err := localB.State(env)
if err != nil {
return nil, fmt.Errorf(strings.TrimSpace(errBackendLocalRead), err)
}
if err := localState.RefreshState(); err != nil {
return nil, fmt.Errorf(strings.TrimSpace(errBackendLocalRead), err)
}
// Initialize the configured backend
b, err := m.backend_C_r_S_unchanged(c, sMgr)
if err != nil {
return nil, fmt.Errorf(
strings.TrimSpace(errBackendSavedUnsetConfig), s.Backend.Type, err)
}
backendState, err := b.State(env)
if err != nil {
return nil, fmt.Errorf(
strings.TrimSpace(errBackendSavedUnsetConfig), s.Backend.Type, err)
}
if err := backendState.RefreshState(); err != nil {
return nil, fmt.Errorf(
strings.TrimSpace(errBackendSavedUnsetConfig), s.Backend.Type, err)
}
// Perform the migration
err = m.backendMigrateState(&backendMigrateOpts{
OneType: s.Backend.Type,
TwoType: "local",
One: backendState,
Two: localState,
One: b,
Two: localB,
})
if err != nil {
return nil, err
@ -762,16 +743,6 @@ func (m *Meta) backend_c_R_S(
return nil, fmt.Errorf(errBackendLocalRead, err)
}
env := m.Env()
localState, err := localB.State(env)
if err != nil {
return nil, fmt.Errorf(errBackendLocalRead, err)
}
if err := localState.RefreshState(); err != nil {
return nil, fmt.Errorf(errBackendLocalRead, err)
}
// Grab the state
s := sMgr.State()
@ -795,22 +766,13 @@ func (m *Meta) backend_c_R_S(
if err != nil {
return nil, err
}
oldState, err := oldB.State(env)
if err != nil {
return nil, fmt.Errorf(
strings.TrimSpace(errBackendSavedUnsetConfig), s.Backend.Type, err)
}
if err := oldState.RefreshState(); err != nil {
return nil, fmt.Errorf(
strings.TrimSpace(errBackendSavedUnsetConfig), s.Backend.Type, err)
}
// Perform the migration
err = m.backendMigrateState(&backendMigrateOpts{
OneType: s.Remote.Type,
TwoType: "local",
One: oldState,
Two: localState,
One: oldB,
Two: localB,
})
if err != nil {
return nil, err
@ -898,33 +860,12 @@ func (m *Meta) backend_C_R_s(
return nil, err
}
env := m.Env()
oldState, err := oldB.State(env)
if err != nil {
return nil, fmt.Errorf(
strings.TrimSpace(errBackendSavedUnsetConfig), s.Backend.Type, err)
}
if err := oldState.RefreshState(); err != nil {
return nil, fmt.Errorf(
strings.TrimSpace(errBackendSavedUnsetConfig), s.Backend.Type, err)
}
// Get the new state
newState, err := b.State(env)
if err != nil {
return nil, fmt.Errorf(strings.TrimSpace(errBackendNewRead), err)
}
if err := newState.RefreshState(); err != nil {
return nil, fmt.Errorf(strings.TrimSpace(errBackendNewRead), err)
}
// Perform the migration
err = m.backendMigrateState(&backendMigrateOpts{
OneType: s.Remote.Type,
TwoType: c.Type,
One: oldState,
Two: newState,
One: oldB,
Two: b,
})
if err != nil {
return nil, err
@ -979,20 +920,12 @@ func (m *Meta) backend_C_r_s(
// If the local state is not empty, we need to potentially do a
// state migration to the new backend (with user permission).
if localS := localState.State(); !localS.Empty() {
backendState, err := b.State(env)
if err != nil {
return nil, fmt.Errorf(errBackendRemoteRead, err)
}
if err := backendState.RefreshState(); err != nil {
return nil, fmt.Errorf(errBackendRemoteRead, err)
}
// Perform the migration
err = m.backendMigrateState(&backendMigrateOpts{
OneType: "local",
TwoType: c.Type,
One: localState,
Two: backendState,
One: localB,
Two: b,
})
if err != nil {
return nil, err
@ -1084,33 +1017,12 @@ func (m *Meta) backend_C_r_S_changed(
"Error loading previously configured backend: %s", err)
}
env := m.Env()
oldState, err := oldB.State(env)
if err != nil {
return nil, fmt.Errorf(
strings.TrimSpace(errBackendSavedUnsetConfig), s.Backend.Type, err)
}
if err := oldState.RefreshState(); err != nil {
return nil, fmt.Errorf(
strings.TrimSpace(errBackendSavedUnsetConfig), s.Backend.Type, err)
}
// Get the new state
newState, err := b.State(env)
if err != nil {
return nil, fmt.Errorf(strings.TrimSpace(errBackendNewRead), err)
}
if err := newState.RefreshState(); err != nil {
return nil, fmt.Errorf(strings.TrimSpace(errBackendNewRead), err)
}
// Perform the migration
err = m.backendMigrateState(&backendMigrateOpts{
OneType: s.Backend.Type,
TwoType: c.Type,
One: oldState,
Two: newState,
One: oldB,
Two: b,
})
if err != nil {
return nil, err
@ -1248,33 +1160,12 @@ func (m *Meta) backend_C_R_S_unchanged(
return nil, err
}
env := m.Env()
oldState, err := oldB.State(env)
if err != nil {
return nil, fmt.Errorf(
strings.TrimSpace(errBackendSavedUnsetConfig), s.Remote.Type, err)
}
if err := oldState.RefreshState(); err != nil {
return nil, fmt.Errorf(
strings.TrimSpace(errBackendSavedUnsetConfig), s.Remote.Type, err)
}
// Get the new state
newState, err := b.State(env)
if err != nil {
return nil, fmt.Errorf(strings.TrimSpace(errBackendNewRead), err)
}
if err := newState.RefreshState(); err != nil {
return nil, fmt.Errorf(strings.TrimSpace(errBackendNewRead), err)
}
// Perform the migration
err = m.backendMigrateState(&backendMigrateOpts{
OneType: s.Remote.Type,
TwoType: s.Backend.Type,
One: oldState,
Two: newState,
One: oldB,
Two: b,
})
if err != nil {
return nil, err

View File

@ -5,8 +5,10 @@ import (
"io/ioutil"
"os"
"path/filepath"
"sort"
"strings"
"github.com/hashicorp/terraform/backend"
clistate "github.com/hashicorp/terraform/command/state"
"github.com/hashicorp/terraform/state"
"github.com/hashicorp/terraform/terraform"
@ -24,30 +26,212 @@ import (
//
// This will attempt to lock both states for the migration.
func (m *Meta) backendMigrateState(opts *backendMigrateOpts) error {
// We need to check what the named state status is. If we're converting
// from multi-state to single-state for example, we need to handle that.
var oneSingle, twoSingle bool
oneStates, err := opts.One.States()
if err == backend.ErrNamedStatesNotSupported {
oneSingle = true
err = nil
}
if err != nil {
return fmt.Errorf(strings.TrimSpace(
errMigrateLoadStates), opts.OneType, err)
}
_, err = opts.Two.States()
if err == backend.ErrNamedStatesNotSupported {
twoSingle = true
err = nil
}
if err != nil {
return fmt.Errorf(strings.TrimSpace(
errMigrateLoadStates), opts.TwoType, err)
}
// Setup defaults
opts.oneEnv = backend.DefaultStateName
opts.twoEnv = backend.DefaultStateName
opts.force = false
// Determine migration behavior based on whether the source/destionation
// supports multi-state.
switch {
// Single-state to single-state. This is the easiest case: we just
// copy the default state directly.
case oneSingle && twoSingle:
return m.backendMigrateState_s_s(opts)
// Single-state to multi-state. This is easy since we just copy
// the default state and ignore the rest in the destination.
case oneSingle && !twoSingle:
return m.backendMigrateState_s_s(opts)
// Multi-state to single-state. If the source has more than the default
// state this is complicated since we have to ask the user what to do.
case !oneSingle && twoSingle:
// If the source only has one state and it is the default,
// treat it as if it doesn't support multi-state.
if len(oneStates) == 1 && oneStates[0] == backend.DefaultStateName {
return m.backendMigrateState_s_s(opts)
}
return m.backendMigrateState_S_s(opts)
// Multi-state to multi-state. We merge the states together (migrating
// each from the source to the destination one by one).
case !oneSingle && !twoSingle:
// If the source only has one state and it is the default,
// treat it as if it doesn't support multi-state.
if len(oneStates) == 1 && oneStates[0] == backend.DefaultStateName {
return m.backendMigrateState_s_s(opts)
}
return m.backendMigrateState_S_S(opts)
}
return nil
}
//-------------------------------------------------------------------
// State Migration Scenarios
//
// The functions below cover handling all the various scenarios that
// can exist when migrating state. They are named in an immediately not
// obvious format but is simple:
//
// Format: backendMigrateState_s1_s2[_suffix]
//
// When s1 or s2 is lower case, it means that it is a single state backend.
// When either is uppercase, it means that state is a multi-state backend.
// The suffix is used to disambiguate multiple cases with the same type of
// states.
//
//-------------------------------------------------------------------
// Multi-state to multi-state.
func (m *Meta) backendMigrateState_S_S(opts *backendMigrateOpts) error {
// Ask the user if they want to migrate their existing remote state
migrate, err := m.confirm(&terraform.InputOpts{
Id: "backend-migrate-multistate-to-multistate",
Query: fmt.Sprintf(
"Do you want to migrate all environments to %q?",
opts.TwoType),
Description: fmt.Sprintf(
strings.TrimSpace(inputBackendMigrateMultiToMulti),
opts.OneType, opts.TwoType),
})
if err != nil {
return fmt.Errorf(
"Error asking for state migration action: %s", err)
}
if !migrate {
return fmt.Errorf("Migration aborted by user.")
}
// Read all the states
oneStates, err := opts.One.States()
if err != nil {
return fmt.Errorf(strings.TrimSpace(
errMigrateLoadStates), opts.OneType, err)
}
// Sort the states so they're always copied alphabetically
sort.Strings(oneStates)
// Go through each and migrate
for _, name := range oneStates {
// Copy the same names
opts.oneEnv = name
opts.twoEnv = name
// Force it, we confirmed above
opts.force = true
// Perform the migration
if err := m.backendMigrateState_s_s(opts); err != nil {
return fmt.Errorf(strings.TrimSpace(
errMigrateMulti), name, opts.OneType, opts.TwoType, err)
}
}
return nil
}
// Multi-state to single state.
func (m *Meta) backendMigrateState_S_s(opts *backendMigrateOpts) error {
currentEnv := m.Env()
// Ask the user if they want to migrate their existing remote state
migrate, err := m.confirm(&terraform.InputOpts{
Id: "backend-migrate-multistate-to-single",
Query: fmt.Sprintf(
"Destination state %q doesn't support environments (named states).\n"+
"Do you want to copy only your current environment?",
opts.TwoType),
Description: fmt.Sprintf(
strings.TrimSpace(inputBackendMigrateMultiToSingle),
opts.OneType, opts.TwoType, currentEnv),
})
if err != nil {
return fmt.Errorf(
"Error asking for state migration action: %s", err)
}
if !migrate {
return fmt.Errorf("Migration aborted by user.")
}
// Copy the default state
opts.oneEnv = currentEnv
return m.backendMigrateState_s_s(opts)
}
// Single state to single state, assumed default state name.
func (m *Meta) backendMigrateState_s_s(opts *backendMigrateOpts) error {
stateOne, err := opts.One.State(opts.oneEnv)
if err != nil {
return fmt.Errorf(strings.TrimSpace(
errMigrateSingleLoadDefault), opts.OneType, err)
}
if err := stateOne.RefreshState(); err != nil {
return fmt.Errorf(strings.TrimSpace(
errMigrateSingleLoadDefault), opts.OneType, err)
}
stateTwo, err := opts.Two.State(opts.twoEnv)
if err != nil {
return fmt.Errorf(strings.TrimSpace(
errMigrateSingleLoadDefault), opts.TwoType, err)
}
if err := stateTwo.RefreshState(); err != nil {
return fmt.Errorf(strings.TrimSpace(
errMigrateSingleLoadDefault), opts.TwoType, err)
}
lockInfoOne := state.NewLockInfo()
lockInfoOne.Operation = "migration"
lockInfoOne.Info = "source state"
lockIDOne, err := clistate.Lock(opts.One, lockInfoOne, m.Ui, m.Colorize())
lockIDOne, err := clistate.Lock(stateOne, lockInfoOne, m.Ui, m.Colorize())
if err != nil {
return fmt.Errorf("Error locking source state: %s", err)
}
defer clistate.Unlock(opts.One, lockIDOne, m.Ui, m.Colorize())
defer clistate.Unlock(stateOne, lockIDOne, m.Ui, m.Colorize())
lockInfoTwo := state.NewLockInfo()
lockInfoTwo.Operation = "migration"
lockInfoTwo.Info = "destination state"
lockIDTwo, err := clistate.Lock(opts.Two, lockInfoTwo, m.Ui, m.Colorize())
lockIDTwo, err := clistate.Lock(stateTwo, lockInfoTwo, m.Ui, m.Colorize())
if err != nil {
return fmt.Errorf("Error locking destination state: %s", err)
}
defer clistate.Unlock(opts.Two, lockIDTwo, m.Ui, m.Colorize())
defer clistate.Unlock(stateTwo, lockIDTwo, m.Ui, m.Colorize())
one := opts.One.State()
two := opts.Two.State()
one := stateOne.State()
two := stateTwo.State()
var confirmFunc func(opts *backendMigrateOpts) (bool, error)
var confirmFunc func(state.State, state.State, *backendMigrateOpts) (bool, error)
switch {
// No migration necessary
case one.Empty() && two.Empty():
@ -72,21 +256,23 @@ func (m *Meta) backendMigrateState(opts *backendMigrateOpts) error {
panic("confirmFunc must not be nil")
}
if !opts.force {
// Confirm with the user whether we want to copy state over
confirm, err := confirmFunc(opts)
confirm, err := confirmFunc(stateOne, stateTwo, opts)
if err != nil {
return err
}
if !confirm {
return nil
}
}
// Confirmed! Write.
if err := opts.Two.WriteState(one); err != nil {
if err := stateTwo.WriteState(one); err != nil {
return fmt.Errorf(strings.TrimSpace(errBackendStateCopy),
opts.OneType, opts.TwoType, err)
}
if err := opts.Two.PersistState(); err != nil {
if err := stateTwo.PersistState(); err != nil {
return fmt.Errorf(strings.TrimSpace(errBackendStateCopy),
opts.OneType, opts.TwoType, err)
}
@ -95,9 +281,9 @@ func (m *Meta) backendMigrateState(opts *backendMigrateOpts) error {
return nil
}
func (m *Meta) backendMigrateEmptyConfirm(opts *backendMigrateOpts) (bool, error) {
func (m *Meta) backendMigrateEmptyConfirm(one, two state.State, opts *backendMigrateOpts) (bool, error) {
inputOpts := &terraform.InputOpts{
Id: "backend-migrate-to-backend",
Id: "backend-migrate-copy-to-empty",
Query: fmt.Sprintf(
"Do you want to copy state from %q to %q?",
opts.OneType, opts.TwoType),
@ -124,10 +310,11 @@ func (m *Meta) backendMigrateEmptyConfirm(opts *backendMigrateOpts) (bool, error
}
}
func (m *Meta) backendMigrateNonEmptyConfirm(opts *backendMigrateOpts) (bool, error) {
func (m *Meta) backendMigrateNonEmptyConfirm(
stateOne, stateTwo state.State, opts *backendMigrateOpts) (bool, error) {
// We need to grab both states so we can write them to a file
one := opts.One.State()
two := opts.Two.State()
one := stateOne.State()
two := stateTwo.State()
// Save both to a temporary
td, err := ioutil.TempDir("", "terraform")
@ -188,9 +375,48 @@ func (m *Meta) backendMigrateNonEmptyConfirm(opts *backendMigrateOpts) (bool, er
type backendMigrateOpts struct {
OneType, TwoType string
One, Two state.State
One, Two backend.Backend
// Fields below are set internally when migrate is called
oneEnv string // source env
twoEnv string // dest env
force bool // if true, won't ask for confirmation
}
const errMigrateLoadStates = `
Error inspecting state in %q: %s
Prior to changing backends, Terraform inspects the source and destionation
states to determine what kind of migration steps need to be taken, if any.
Terraform failed to load the states. The data in both the source and the
destination remain unmodified. Please resolve the above error and try again.
`
const errMigrateSingleLoadDefault = `
Error loading state from %q: %s
Terraform failed to load the default state from %[1]q.
State migration cannot occur unless the state can be loaded. Backend
modification and state migration has been aborted. The state in both the
source and the destination remain unmodified. Please resolve the
above error and try again.
`
const errMigrateMulti = `
Error migrating the environment %q from %q to %q:
%s
Terraform copies environments in alphabetical order. Any environments
alphabetically earlier than this one have been copied. Any environments
later than this haven't been modified in the destination. No environments
in the source state have been modified.
Please resolve the error above and run the initialization command again.
This will attempt to copy (with permission) all environments again.
`
const errBackendStateCopy = `
Error copying state from %q to %q: %s
@ -215,3 +441,26 @@ Two (%[2]q): %[4]s
Do you want to copy the state from %[1]q to %[2]q? Enter "yes" to copy
and "no" to start with the existing state in %[2]q.
`
const inputBackendMigrateMultiToSingle = `
The existing backend %[1]q supports environments and you currently are
using more than one. The target backend %[2]q doesn't support environments.
If you continue, Terraform will offer to copy your current environment
%[3]q to the default environment in the target. Your existing environments
in the source backend won't be modified. If you want to switch environments,
back them up, or cancel altogether, answer "no" and Terraform will abort.
`
const inputBackendMigrateMultiToMulti = `
Both the existing backend %[1]q and the target backend %[2]q support
environments. When migrating between backends, Terraform will copy all
environments (with the same names). THIS WILL OVERWRITE any conflicting
states in the destination.
Terraform initialization doesn't currently migrate only select environments.
If you want to migrate a select number of environments, you must manually
pull and push those states.
If you answer "yes", Terraform will migrate all states. If you answer
"no", Terraform will abort.
`

View File

@ -4,10 +4,14 @@ import (
"io/ioutil"
"os"
"path/filepath"
"reflect"
"sort"
"strings"
"testing"
"github.com/hashicorp/terraform/backend"
backendinit "github.com/hashicorp/terraform/backend/init"
backendlocal "github.com/hashicorp/terraform/backend/local"
"github.com/hashicorp/terraform/helper/copy"
"github.com/hashicorp/terraform/state"
"github.com/hashicorp/terraform/terraform"
@ -951,6 +955,340 @@ func TestMetaBackend_configuredChangeCopy(t *testing.T) {
}
}
// Changing a configured backend that supports only single states to another
// backend that only supports single states.
func TestMetaBackend_configuredChangeCopy_singleState(t *testing.T) {
// Create a temporary working directory that is empty
td := tempDir(t)
copy.CopyDir(testFixturePath("backend-change-single-to-single"), td)
defer os.RemoveAll(td)
defer testChdir(t, td)()
// Register the single-state backend
backendinit.Set("local-single", backendlocal.TestNewLocalSingle)
defer backendinit.Set("local-single", nil)
// Ask input
defer testInputMap(t, map[string]string{
"backend-migrate-to-new": "yes",
"backend-migrate-copy-to-empty": "yes",
})()
// Setup the meta
m := testMetaBackend(t, nil)
// Get the backend
b, err := m.Backend(&BackendOpts{Init: true})
if err != nil {
t.Fatalf("bad: %s", err)
}
// Check the state
s, err := b.State(backend.DefaultStateName)
if err != nil {
t.Fatalf("bad: %s", err)
}
if err := s.RefreshState(); err != nil {
t.Fatalf("bad: %s", err)
}
state := s.State()
if state == nil {
t.Fatal("state should not be nil")
}
if state.Lineage != "backend-change" {
t.Fatalf("bad: %#v", state)
}
// Verify no local state
if _, err := os.Stat(DefaultStateFilename); err == nil {
t.Fatal("file should not exist")
}
// Verify no local backup
if _, err := os.Stat(DefaultStateFilename + DefaultBackupExtension); err == nil {
t.Fatal("file should not exist")
}
}
// Changing a configured backend that supports multi-state to a
// backend that only supports single states. The multi-state only has
// a default state.
func TestMetaBackend_configuredChangeCopy_multiToSingleDefault(t *testing.T) {
// Create a temporary working directory that is empty
td := tempDir(t)
copy.CopyDir(testFixturePath("backend-change-multi-default-to-single"), td)
defer os.RemoveAll(td)
defer testChdir(t, td)()
// Register the single-state backend
backendinit.Set("local-single", backendlocal.TestNewLocalSingle)
defer backendinit.Set("local-single", nil)
// Ask input
defer testInputMap(t, map[string]string{
"backend-migrate-to-new": "yes",
"backend-migrate-copy-to-empty": "yes",
})()
// Setup the meta
m := testMetaBackend(t, nil)
// Get the backend
b, err := m.Backend(&BackendOpts{Init: true})
if err != nil {
t.Fatalf("bad: %s", err)
}
// Check the state
s, err := b.State(backend.DefaultStateName)
if err != nil {
t.Fatalf("bad: %s", err)
}
if err := s.RefreshState(); err != nil {
t.Fatalf("bad: %s", err)
}
state := s.State()
if state == nil {
t.Fatal("state should not be nil")
}
if state.Lineage != "backend-change" {
t.Fatalf("bad: %#v", state)
}
// Verify no local state
if _, err := os.Stat(DefaultStateFilename); err == nil {
t.Fatal("file should not exist")
}
// Verify no local backup
if _, err := os.Stat(DefaultStateFilename + DefaultBackupExtension); err == nil {
t.Fatal("file should not exist")
}
}
// Changing a configured backend that supports multi-state to a
// backend that only supports single states.
func TestMetaBackend_configuredChangeCopy_multiToSingle(t *testing.T) {
// Create a temporary working directory that is empty
td := tempDir(t)
copy.CopyDir(testFixturePath("backend-change-multi-to-single"), td)
defer os.RemoveAll(td)
defer testChdir(t, td)()
// Register the single-state backend
backendinit.Set("local-single", backendlocal.TestNewLocalSingle)
defer backendinit.Set("local-single", nil)
// Ask input
defer testInputMap(t, map[string]string{
"backend-migrate-to-new": "yes",
"backend-migrate-multistate-to-single": "yes",
"backend-migrate-copy-to-empty": "yes",
})()
// Setup the meta
m := testMetaBackend(t, nil)
// Get the backend
b, err := m.Backend(&BackendOpts{Init: true})
if err != nil {
t.Fatalf("bad: %s", err)
}
// Check the state
s, err := b.State(backend.DefaultStateName)
if err != nil {
t.Fatalf("bad: %s", err)
}
if err := s.RefreshState(); err != nil {
t.Fatalf("bad: %s", err)
}
state := s.State()
if state == nil {
t.Fatal("state should not be nil")
}
if state.Lineage != "backend-change" {
t.Fatalf("bad: %#v", state)
}
// Verify no local state
if _, err := os.Stat(DefaultStateFilename); err == nil {
t.Fatal("file should not exist")
}
// Verify no local backup
if _, err := os.Stat(DefaultStateFilename + DefaultBackupExtension); err == nil {
t.Fatal("file should not exist")
}
// Verify existing environments exist
envPath := filepath.Join(backendlocal.DefaultEnvDir, "env2", backendlocal.DefaultStateFilename)
if _, err := os.Stat(envPath); err != nil {
t.Fatal("env should exist")
}
}
// Changing a configured backend that supports multi-state to a
// backend that only supports single states.
func TestMetaBackend_configuredChangeCopy_multiToSingleCurrentEnv(t *testing.T) {
// Create a temporary working directory that is empty
td := tempDir(t)
copy.CopyDir(testFixturePath("backend-change-multi-to-single"), td)
defer os.RemoveAll(td)
defer testChdir(t, td)()
// Register the single-state backend
backendinit.Set("local-single", backendlocal.TestNewLocalSingle)
defer backendinit.Set("local-single", nil)
// Ask input
defer testInputMap(t, map[string]string{
"backend-migrate-to-new": "yes",
"backend-migrate-multistate-to-single": "yes",
"backend-migrate-copy-to-empty": "yes",
})()
// Setup the meta
m := testMetaBackend(t, nil)
// Change env
if err := m.SetEnv("env2"); err != nil {
t.Fatalf("bad: %s", err)
}
// Get the backend
b, err := m.Backend(&BackendOpts{Init: true})
if err != nil {
t.Fatalf("bad: %s", err)
}
// Check the state
s, err := b.State(backend.DefaultStateName)
if err != nil {
t.Fatalf("bad: %s", err)
}
if err := s.RefreshState(); err != nil {
t.Fatalf("bad: %s", err)
}
state := s.State()
if state == nil {
t.Fatal("state should not be nil")
}
if state.Lineage != "backend-change-env2" {
t.Fatalf("bad: %#v", state)
}
// Verify no local state
if _, err := os.Stat(DefaultStateFilename); err == nil {
t.Fatal("file should not exist")
}
// Verify no local backup
if _, err := os.Stat(DefaultStateFilename + DefaultBackupExtension); err == nil {
t.Fatal("file should not exist")
}
// Verify existing environments exist
envPath := filepath.Join(backendlocal.DefaultEnvDir, "env2", backendlocal.DefaultStateFilename)
if _, err := os.Stat(envPath); err != nil {
t.Fatal("env should exist")
}
}
// Changing a configured backend that supports multi-state to a
// backend that also supports multi-state.
func TestMetaBackend_configuredChangeCopy_multiToMulti(t *testing.T) {
// Create a temporary working directory that is empty
td := tempDir(t)
copy.CopyDir(testFixturePath("backend-change-multi-to-multi"), td)
defer os.RemoveAll(td)
defer testChdir(t, td)()
// Ask input
defer testInputMap(t, map[string]string{
"backend-migrate-to-new": "yes",
"backend-migrate-multistate-to-multistate": "yes",
})()
// Setup the meta
m := testMetaBackend(t, nil)
// Get the backend
b, err := m.Backend(&BackendOpts{Init: true})
if err != nil {
t.Fatalf("bad: %s", err)
}
// Check resulting states
states, err := b.States()
if err != nil {
t.Fatalf("bad: %s", err)
}
sort.Strings(states)
expected := []string{"default", "env2"}
if !reflect.DeepEqual(states, expected) {
t.Fatalf("bad: %#v", states)
}
{
// Check the default state
s, err := b.State(backend.DefaultStateName)
if err != nil {
t.Fatalf("bad: %s", err)
}
if err := s.RefreshState(); err != nil {
t.Fatalf("bad: %s", err)
}
state := s.State()
if state == nil {
t.Fatal("state should not be nil")
}
if state.Lineage != "backend-change" {
t.Fatalf("bad: %#v", state)
}
}
{
// Check the other state
s, err := b.State("env2")
if err != nil {
t.Fatalf("bad: %s", err)
}
if err := s.RefreshState(); err != nil {
t.Fatalf("bad: %s", err)
}
state := s.State()
if state == nil {
t.Fatal("state should not be nil")
}
if state.Lineage != "backend-change-env2" {
t.Fatalf("bad: %#v", state)
}
}
// Verify no local backup
if _, err := os.Stat(DefaultStateFilename + DefaultBackupExtension); err == nil {
t.Fatal("file should not exist")
}
{
// Verify existing environments exist
envPath := filepath.Join(backendlocal.DefaultEnvDir, "env2", backendlocal.DefaultStateFilename)
if _, err := os.Stat(envPath); err != nil {
t.Fatal("env should exist")
}
}
{
// Verify new environments exist
envPath := filepath.Join("envdir-new", "env2", backendlocal.DefaultStateFilename)
if _, err := os.Stat(envPath); err != nil {
t.Fatal("env should exist")
}
}
}
// Unsetting a saved backend
func TestMetaBackend_configuredUnset(t *testing.T) {
// Create a temporary working directory that is empty

View File

@ -0,0 +1,22 @@
{
"version": 3,
"serial": 0,
"lineage": "666f9301-7e65-4b19-ae23-71184bb19b03",
"backend": {
"type": "local",
"config": {
"path": "local-state.tfstate"
},
"hash": 9073424445967744180
},
"modules": [
{
"path": [
"root"
],
"outputs": {},
"resources": {},
"depends_on": []
}
]
}

View File

@ -0,0 +1,6 @@
{
"version": 3,
"terraform_version": "0.8.2",
"serial": 7,
"lineage": "backend-change"
}

View File

@ -0,0 +1,5 @@
terraform {
backend "local-single" {
path = "local-state-2.tfstate"
}
}

View File

@ -0,0 +1,22 @@
{
"version": 3,
"serial": 0,
"lineage": "666f9301-7e65-4b19-ae23-71184bb19b03",
"backend": {
"type": "local",
"config": {
"path": "local-state.tfstate"
},
"hash": 9073424445967744180
},
"modules": [
{
"path": [
"root"
],
"outputs": {},
"resources": {},
"depends_on": []
}
]
}

View File

@ -0,0 +1,6 @@
{
"version": 3,
"terraform_version": "0.8.2",
"serial": 7,
"lineage": "backend-change"
}

View File

@ -0,0 +1,5 @@
terraform {
backend "local" {
environment_dir = "envdir-new"
}
}

View File

@ -0,0 +1,6 @@
{
"version": 3,
"terraform_version": "0.8.2",
"serial": 7,
"lineage": "backend-change-env2"
}

View File

@ -0,0 +1,22 @@
{
"version": 3,
"serial": 0,
"lineage": "666f9301-7e65-4b19-ae23-71184bb19b03",
"backend": {
"type": "local",
"config": {
"path": "local-state.tfstate"
},
"hash": 9073424445967744180
},
"modules": [
{
"path": [
"root"
],
"outputs": {},
"resources": {},
"depends_on": []
}
]
}

View File

@ -0,0 +1,6 @@
{
"version": 3,
"terraform_version": "0.8.2",
"serial": 7,
"lineage": "backend-change"
}

View File

@ -0,0 +1,5 @@
terraform {
backend "local-single" {
path = "local-state-2.tfstate"
}
}

View File

@ -0,0 +1,6 @@
{
"version": 3,
"terraform_version": "0.8.2",
"serial": 7,
"lineage": "backend-change-env2"
}

View File

@ -0,0 +1,22 @@
{
"version": 3,
"serial": 0,
"lineage": "666f9301-7e65-4b19-ae23-71184bb19b03",
"backend": {
"type": "local-single",
"config": {
"path": "local-state.tfstate"
},
"hash": 9073424445967744180
},
"modules": [
{
"path": [
"root"
],
"outputs": {},
"resources": {},
"depends_on": []
}
]
}

View File

@ -0,0 +1,6 @@
{
"version": 3,
"terraform_version": "0.8.2",
"serial": 7,
"lineage": "backend-change"
}

View File

@ -0,0 +1,5 @@
terraform {
backend "local-single" {
path = "local-state-2.tfstate"
}
}

View File

@ -20,6 +20,7 @@ import (
var defaultInputReader io.Reader
var defaultInputWriter io.Writer
var testInputResponse []string
var testInputResponseMap map[string]string
// UIInput is an implementation of terraform.UIInput that asks the CLI
// for input stdin.
@ -65,13 +66,25 @@ func (i *UIInput) Input(opts *terraform.InputOpts) (string, error) {
return "", errors.New("interrupted")
}
// If we have test results, return those
// If we have test results, return those. testInputResponse is the
// "old" way of doing it and we should remove that.
if testInputResponse != nil {
v := testInputResponse[0]
testInputResponse = testInputResponse[1:]
return v, nil
}
// testInputResponseMap is the new way for test responses, based on
// the query ID.
if testInputResponseMap != nil {
v, ok := testInputResponseMap[opts.Id]
if !ok {
return "", fmt.Errorf("unexpected input request in test: %s", opts.Id)
}
return v, nil
}
log.Printf("[DEBUG] command: asking for input: %q", opts.Query)
// Listen for interrupts so we can cancel the input ask