func resourceComputeInstanceMigrateState(
v int, is *terraform.InstanceState, meta interface{}) (*terraform.InstanceState, error) {
if is.Empty() {
log.Println("[DEBUG] Empty InstanceState; nothing to migrate.")
return is, nil
}
switch v {
case 0:
log.Println("[INFO] Found Compute Instance State v0; migrating to v1")
is, err := migrateStateV0toV1(is)
if err != nil {
return is, err
}
fallthrough
case 1:
log.Println("[INFO] Found Compute Instance State v1; migrating to v2")
is, err := migrateStateV1toV2(is)
if err != nil {
return is, err
}
return is, nil
default:
return is, fmt.Errorf("Unexpected schema version: %d", v)
}
}
// Apply executes the remote exec provisioner
func (p *ResourceProvisioner) Apply(
o terraform.UIOutput,
s *terraform.InstanceState,
c *terraform.ResourceConfig) error {
// Get a new communicator
comm, err := communicator.New(s)
if err != nil {
return err
}
// Collect the scripts
scripts, err := p.collectScripts(c)
if err != nil {
return err
}
for _, s := range scripts {
defer s.Close()
}
// Copy and execute each script
if err := p.runScripts(o, comm, scripts); err != nil {
return err
}
return nil
}
func migrateStateV0toV1(is *terraform.InstanceState) (*terraform.InstanceState, error) {
if is.Empty() || is.Attributes == nil {
log.Println("[DEBUG] Empty InstanceState; nothing to migrate.")
return is, nil
}
log.Printf("[DEBUG] Attributes before migration: %#v", is.Attributes)
// Delete old count
delete(is.Attributes, "block_device.#")
oldBds, err := readV0BlockDevices(is)
if err != nil {
return is, err
}
// seed count fields for new types
is.Attributes["ebs_block_device.#"] = "0"
is.Attributes["ephemeral_block_device.#"] = "0"
// depending on if state was v0.3.7 or an earlier version, it might have
// root_block_device defined already
if _, ok := is.Attributes["root_block_device.#"]; !ok {
is.Attributes["root_block_device.#"] = "0"
}
for _, oldBd := range oldBds {
if err := writeV1BlockDevice(is, oldBd); err != nil {
return is, err
}
}
log.Printf("[DEBUG] Attributes after migration: %#v", is.Attributes)
return is, nil
}
// State returns the new InstanceState after the diff and any Set
// calls.
func (d *ResourceData) State() *terraform.InstanceState {
var result terraform.InstanceState
result.ID = d.Id()
// If we have no ID, then this resource doesn't exist and we just
// return nil.
if result.ID == "" {
return nil
}
// In order to build the final state attributes, we read the full
// attribute set as a map[string]interface{}, write it to a MapFieldWriter,
// and then use that map.
rawMap := make(map[string]interface{})
for k := range d.schema {
source := getSourceSet
if d.partial {
source = getSourceState
if _, ok := d.partialMap[k]; ok {
source = getSourceSet
}
}
raw := d.get([]string{k}, source)
if raw.Exists && !raw.Computed {
rawMap[k] = raw.Value
if raw.ValueProcessed != nil {
rawMap[k] = raw.ValueProcessed
}
}
}
mapW := &MapFieldWriter{Schema: d.schema}
if err := mapW.WriteField(nil, rawMap); err != nil {
return nil
}
result.Attributes = mapW.Map()
result.Ephemeral.ConnInfo = d.ConnInfo()
// TODO: This is hacky and we can remove this when we have a proper
// state writer. We should instead have a proper StateFieldWriter
// and use that.
for k, schema := range d.schema {
if schema.Type != TypeMap {
continue
}
if result.Attributes[k] == "" {
delete(result.Attributes, k)
}
}
if v := d.Id(); v != "" {
result.Attributes["id"] = d.Id()
}
return &result
}
// Apply performs a create or update depending on the diff, and calls
// the proper function on the matching Resource.
func (m *Map) Apply(
info *terraform.InstanceInfo,
s *terraform.InstanceState,
d *terraform.InstanceDiff,
meta interface{}) (*terraform.InstanceState, error) {
r, ok := m.Mapping[info.Type]
if !ok {
return nil, fmt.Errorf("Unknown resource type: %s", info.Type)
}
if d.Destroy || d.RequiresNew() {
if s.ID != "" {
// Destroy the resource if it is created
err := r.Destroy(s, meta)
if err != nil {
return s, err
}
s.ID = ""
}
// If we're only destroying, and not creating, then return now.
// Otherwise, we continue so that we can create a new resource.
if !d.RequiresNew() {
return nil, nil
}
}
var result *terraform.InstanceState
var err error
if s.ID == "" {
result, err = r.Create(s, d, meta)
} else {
if r.Update == nil {
return s, fmt.Errorf(
"Resource type '%s' doesn't support update",
info.Type)
}
result, err = r.Update(s, d, meta)
}
if result != nil {
if result.Attributes == nil {
result.Attributes = make(map[string]string)
}
result.Attributes["id"] = result.ID
}
return result, err
}
func migrateKeyPairStateV0toV1(is *terraform.InstanceState) (*terraform.InstanceState, error) {
if is.Empty() {
log.Println("[DEBUG] Empty InstanceState; nothing to migrate.")
return is, nil
}
log.Printf("[DEBUG] Attributes before migration: %#v", is.Attributes)
// replace public_key with a stripped version, removing `\n` from the end
// see https://github.com/hashicorp/terraform/issues/3455
is.Attributes["public_key"] = strings.TrimSpace(is.Attributes["public_key"])
log.Printf("[DEBUG] Attributes after migration: %#v", is.Attributes)
return is, nil
}
func migrateSGRuleStateV0toV1(is *terraform.InstanceState) (*terraform.InstanceState, error) {
if is.Empty() {
log.Println("[DEBUG] Empty InstanceState; nothing to migrate.")
return is, nil
}
perm, err := migrateExpandIPPerm(is.Attributes)
if err != nil {
return nil, fmt.Errorf("[WARN] Error making new IP Permission in Security Group migration")
}
log.Printf("[DEBUG] Attributes before migration: %#v", is.Attributes)
newID := ipPermissionIDHash(is.Attributes["security_group_id"], is.Attributes["type"], perm)
is.Attributes["id"] = newID
is.ID = newID
log.Printf("[DEBUG] Attributes after migration: %#v, new id: %s", is.Attributes, newID)
return is, nil
}
func (r *Resource) recordCurrentSchemaVersion(
state *terraform.InstanceState) *terraform.InstanceState {
if state != nil && r.SchemaVersion > 0 {
if state.Meta == nil {
state.Meta = make(map[string]string)
}
state.Meta["schema_version"] = strconv.Itoa(r.SchemaVersion)
}
return state
}