func resourceRemoteStateRead(d *schema.ResourceData, meta interface{}) error {
backend := d.Get("backend").(string)
config := make(map[string]string)
for k, v := range d.Get("config").(map[string]interface{}) {
config[k] = v.(string)
}
// Create the client to access our remote state
log.Printf("[DEBUG] Initializing remote state client: %s", backend)
client, err := remote.NewClient(backend, config)
if err != nil {
return err
}
// Create the remote state itself and refresh it in order to load the state
log.Printf("[DEBUG] Loading remote state...")
state := &remote.State{Client: client}
if err := state.RefreshState(); err != nil {
return err
}
var outputs map[string]string
if !state.State().Empty() {
outputs = state.State().RootModule().Outputs
}
d.SetId(time.Now().UTC().String())
d.Set("output", outputs)
return nil
}
// validateRemoteConfig is used to verify that the remote configuration
// we have is valid
func (c *RemoteConfigCommand) validateRemoteConfig() error {
conf := c.remoteConf
_, err := remote.NewClient(conf.Type, conf.Config)
if err != nil {
c.Ui.Error(fmt.Sprintf(
"%s\n\n"+
"If the error message above mentions requiring or modifying configuration\n"+
"options, these are set using the `-backend-config` flag. Example:\n"+
"-backend-config=\"name=foo\" to set the `name` configuration",
err))
}
return err
}
func remoteState(
local *terraform.State,
localPath string, refresh bool) (*state.CacheState, error) {
// If there is no remote settings, it is an error
if local.Remote == nil {
return nil, fmt.Errorf("Remote state cache has no remote info")
}
// Initialize the remote client based on the local state
client, err := remote.NewClient(strings.ToLower(local.Remote.Type), local.Remote.Config)
if err != nil {
return nil, errwrap.Wrapf(fmt.Sprintf(
"Error initializing remote driver '%s': {{err}}",
local.Remote.Type), err)
}
// Create the remote client
durable := &remote.State{Client: client}
// Create the cached client
cache := &state.CacheState{
Cache: &state.LocalState{Path: localPath},
Durable: durable,
}
if refresh {
// Refresh the cache
if err := cache.RefreshState(); err != nil {
return nil, errwrap.Wrapf(
"Error reloading remote state: {{err}}", err)
}
switch cache.RefreshResult() {
// All the results below can be safely ignored since it means the
// pull was successful in some way. Noop = nothing happened.
// Init = both are empty. UpdateLocal = local state was older and
// updated.
//
// We don't have to do anything, the pull was successful.
case state.CacheRefreshNoop:
case state.CacheRefreshInit:
case state.CacheRefreshUpdateLocal:
// Our local state has a higher serial number than remote, so we
// want to explicitly sync the remote side with our local so that
// the remote gets the latest serial number.
case state.CacheRefreshLocalNewer:
// Write our local state out to the durable storage to start.
if err := cache.WriteState(local); err != nil {
return nil, errwrap.Wrapf(
"Error preparing remote state: {{err}}", err)
}
if err := cache.PersistState(); err != nil {
return nil, errwrap.Wrapf(
"Error preparing remote state: {{err}}", err)
}
default:
return nil, fmt.Errorf(
"Unknown refresh result: %s", cache.RefreshResult())
}
}
return cache, nil
}