backend/gcs: Mark the unused attributes project and region as removed.

These two attributes are not used since aec45e6967.

backend/remote-state/gcs/backend.go

@@ -32,9 +32,6 @@ type Backend struct {
 	defaultStateFile string
 
 	encryptionKey []byte
-
-	projectID string
-	region    string
 }
 
 func New() backend.Backend {
@@ -80,6 +77,7 @@ func New() backend.Backend {
 				Optional:    true,
 				Description: "Google Cloud Project ID",
 				Default:     "",
+				Removed:     "Please remove this attribute. It is not used since the backend no longer creates the bucket if it does not yet exist.",
 			},
 
 			"region": {
@@ -87,6 +85,7 @@ func New() backend.Backend {
 				Optional:    true,
 				Description: "Region / location in which to create the bucket",
 				Default:     "",
+				Removed:     "Please remove this attribute. It is not used since the backend no longer creates the bucket if it does not yet exist.",
 			},
 		},
 	}
@@ -115,15 +114,6 @@ func (b *Backend) configure(ctx context.Context) error {
 
 	b.defaultStateFile = strings.TrimLeft(data.Get("path").(string), "/")
 
-	b.projectID = data.Get("project").(string)
-	if id := os.Getenv("GOOGLE_PROJECT"); b.projectID == "" && id != "" {
-		b.projectID = id
-	}
-	b.region = data.Get("region").(string)
-	if r := os.Getenv("GOOGLE_REGION"); b.projectID == "" && r != "" {
-		b.region = r
-	}
-
 	var opts []option.ClientOption
 
 	creds := data.Get("credentials").(string)

backend/remote-state/gcs/backend_test.go

@@ -181,7 +181,6 @@ func setupBackend(t *testing.T, bucket, prefix, key string) backend.Backend {
 	}
 
 	config := map[string]interface{}{
-		"project":        projectID,
 		"bucket":         bucket,
 		"prefix":         prefix,
 		"encryption_key": key,
@@ -199,9 +198,9 @@ func setupBackend(t *testing.T, bucket, prefix, key string) backend.Backend {
 		}
 
 		attrs := &storage.BucketAttrs{
-			Location: be.region,
+			Location: os.Getenv("GOOGLE_REGION"),
 		}
-		err := bkt.Create(be.storageContext, be.projectID, attrs)
+		err := bkt.Create(be.storageContext, projectID, attrs)
 		if err != nil {
 			t.Fatal(err)
 		}

website/docs/backends/types/gcs.html.md

@@ -10,7 +10,12 @@ description: |-
 
 **Kind: Standard (with locking)**
 
-Stores the state as an object in a configurable prefix and bucket on [Google Cloud Storage](https://cloud.google.com/storage/) (GCS).
+Stores the state as an object in a configurable prefix in a given bucket on [Google Cloud Storage](https://cloud.google.com/storage/) (GCS).
+This backend also supports [state locking](/docs/state/locking.html).
+
+~> **Warning!** It is highly recommended that you enable
+[Object Versioning](https://cloud.google.com/storage/docs/object-versioning)
+on the GCS bucket to allow for state recovery in the case of accidental deletions and human error.
 
 ## Example Configuration
 
@@ -55,8 +60,4 @@ The following configuration options are supported:
     The provided credentials need to have the `devstorage.read_write` scope and `WRITER` permissions on the bucket.
  *  `prefix` - (Optional) GCS prefix inside the bucket. Named states for workspaces are stored in an object called `<prefix>/<name>.tfstate`.
  *  `path` - (Deprecated) GCS path to the state file of the default state. For backwards compatibility only, use `prefix` instead.
- *  `project` / `GOOGLE_PROJECT` - (Optional) The project ID to which the bucket belongs. This is only used when creating a new bucket during initialization.
-    Since buckets have globally unique names, the project ID is not required to access the bucket during normal operation.
- *  `region` / `GOOGLE_REGION` - (Optional) The region in which a new bucket is created.
-    For more information, see [Bucket Locations](https://cloud.google.com/storage/docs/bucket-locations).
  *  `encryption_key` / `GOOGLE_ENCRYPTION_KEY` - (Optional) A 32 byte base64 encoded 'customer supplied encryption key' used to encrypt all state. For more information see [Customer Supplied Encryption Keys](https://cloud.google.com/storage/docs/encryption#customer-supplied).