Allow GCP buckets in other regions (#1570)

* Allow GCP buckets in other regions

* go mod tidy -compat=1.17

* go mod tidy

go.mod

@@ -4,7 +4,7 @@ go 1.17
 
 replace (
 	github.com/googleapis/gnostic => github.com/googleapis/gnostic v0.4.1
-	github.com/graymeta/stow => github.com/kastenhq/stow v0.2.6-kasten.1.0.20220719172801-c11a0e5f2e09
+	github.com/graymeta/stow => github.com/kastenhq/stow v0.2.6-kasten.1.0.20220726203146-8a90401257d4
 	github.com/rook/operator-kit => github.com/kastenhq/operator-kit v0.0.0-20180316185208-859e831cc18d
 	gopkg.in/check.v1 => github.com/kastenhq/check v0.0.0-20180626002341-0264cfcea734
 )

go.sum

@@ -591,8 +591,8 @@ github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7V
 github.com/julienschmidt/httprouter v1.3.0/go.mod h1:JR6WtHb+2LUe8TCKY3cZOxFyyO8IZAc4RVcycCCAKdM=
 github.com/kastenhq/check v0.0.0-20180626002341-0264cfcea734 h1:qulsCaCv+O2y9/sQ9nd5KChnAgFOWakTHQ9ZADjs6DQ=
 github.com/kastenhq/check v0.0.0-20180626002341-0264cfcea734/go.mod h1:rdqSnvOJuKCPFW/h2rVLuXOAkRnHHdp9PZcKx4HCoDM=
-github.com/kastenhq/stow v0.2.6-kasten.1.0.20220719172801-c11a0e5f2e09 h1:E5PMnpRjRwhBdLiVkVKNxYmLg4RemY5IJEZVBO+jrgc=
-github.com/kastenhq/stow v0.2.6-kasten.1.0.20220719172801-c11a0e5f2e09/go.mod h1:6+N3Bn9Whpb+bnRFQ2A2kAyAUiYvYM0+N5bArNd4K8s=
+github.com/kastenhq/stow v0.2.6-kasten.1.0.20220726203146-8a90401257d4 h1:MuAfIUYqmW0bIxyltt4EIAgKSV3GxvEwZzlqBqGLQko=
+github.com/kastenhq/stow v0.2.6-kasten.1.0.20220726203146-8a90401257d4/go.mod h1:6+N3Bn9Whpb+bnRFQ2A2kAyAUiYvYM0+N5bArNd4K8s=
 github.com/kelseyhightower/envconfig v1.4.0 h1:Im6hONhd3pLkfDFsbRgu68RDNkGF1r3dvMUtDTo2cv8=
 github.com/kelseyhightower/envconfig v1.4.0/go.mod h1:cccZRl6mQpaq41TPp5QxidR+Sa3axMbJDNb//FQX6Gg=
 github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvWXihfKN4Q=

pkg/objectstore/const.go

@@ -15,6 +15,7 @@
 package objectstore
 
 const googleGCSHost = "https://storage.googleapis.com"
+const REGIONAL = "REGIONAL"
 
 // ProviderType enum for different providers
 type ProviderType string

pkg/objectstore/objectstore.go

@@ -145,15 +145,20 @@ func s3Config(ctx context.Context, config ProviderConfig, secret *Secret) (stowK
 	return stows3.Kind, cm, nil
 }
 
-func gcsConfig(ctx context.Context, secret *Secret) (stowKind string, stowConfig stow.Config, err error) {
+func gcsConfig(ctx context.Context, config ProviderConfig, secret *Secret) (stowKind string, stowConfig stow.Config, err error) {
 	var configJSON string
 	var projectID string
+	cm := stow.ConfigMap{}
 	if secret != nil {
 		if secret.Type != SecretTypeGcpServiceAccountKey {
 			return "", nil, errors.Errorf("invalid secret type %s", secret.Type)
 		}
 		configJSON = secret.Gcp.ServiceKey
 		projectID = secret.Gcp.ProjectID
+		if config.Region != "" {
+			cm[stowgcs.ConfigLocation] = config.Region
+			cm[stowgcs.ConfigStorageClass] = REGIONAL
+		}
 	} else {
 		creds, err := google.FindDefaultCredentials(ctx, compute.ComputeScope)
 		if err != nil {
@@ -162,11 +167,10 @@ func gcsConfig(ctx context.Context, secret *Secret) (stowKind string, stowConfig
 		configJSON = string(creds.JSON)
 		projectID = creds.ProjectID
 	}
-	return stowgcs.Kind, stow.ConfigMap{
-		stowgcs.ConfigJSON:      configJSON,
-		stowgcs.ConfigProjectId: projectID,
-		stowgcs.ConfigScopes:    "",
-	}, nil
+	cm[stowgcs.ConfigJSON] = configJSON
+	cm[stowgcs.ConfigProjectId] = projectID
+	cm[stowgcs.ConfigScopes] = ""
+	return stowgcs.Kind, cm, nil
 }
 
 func azureConfig(ctx context.Context, secret *Secret) (stowKind string, stowConfig stow.Config, err error) {
@@ -203,7 +207,7 @@ func getConfig(ctx context.Context, config ProviderConfig, secret *Secret) (stow
 	case ProviderTypeS3:
 		return s3Config(ctx, config, secret)
 	case ProviderTypeGCS:
-		return gcsConfig(ctx, secret)
+		return gcsConfig(ctx, config, secret)
 	case ProviderTypeAzure:
 		return azureConfig(ctx, secret)
 	default: