Set hinting region to use for GetBucketRegion()

changelogs/unreleased/210-kaovilai

@@ -0,0 +1 @@
+Fix region discovery after aws-sdk-go-v2

velero-plugin-for-aws/object_store.go

@@ -137,33 +137,32 @@ func (o *ObjectStore) Init(config map[string]string) error {
 		}
 	}
 
+	cfg, err := newConfigBuilder(o.log).WithRegion(region).
+		WithProfile(credentialProfile).
+		WithCredentialsFile(credentialsFile).
+		WithTLSSettings(insecureSkipTLSVerify, caCert).Build()
+	if err != nil {
+		return errors.WithStack(err)
+	}
+
 	// AWS (not an alternate S3-compatible API) and region not
 	// explicitly specified: determine the bucket's region
+	// GetBucketRegion will attempt to get the region for a bucket using the
+	// client's configured region to determine which AWS partition to perform the query on.
 	if s3URL == "" && region == "" {
-		cfg, err := newConfigBuilder(o.log).WithTLSSettings(insecureSkipTLSVerify, caCert).Build()
+		regionClient, err := newS3Client(cfg, s3URL, s3ForcePathStyle)
 		if err != nil {
 			return errors.WithStack(err)
 		}
-		client, err := newS3Client(cfg, s3URL, s3ForcePathStyle)
-		if err != nil {
-			return errors.WithStack(err)
-		}
-		region, err = manager.GetBucketRegion(context.Background(), client, bucket)
+		region, err = manager.GetBucketRegion(context.Background(), regionClient, bucket, func(o *s3.Options) { o.Region = "us-east-1" })
 		if err != nil {
 			o.log.Errorf("Failed to determine bucket's region bucket: %s, error: %v", bucket, err)
 			return err
 		}
 		if region == "" {
 			return fmt.Errorf("unable to determine bucket's region, bucket: %s", bucket)
 		}
-	}
-
-	cfg, err := newConfigBuilder(o.log).WithRegion(region).
-		WithProfile(credentialProfile).
-		WithCredentialsFile(credentialsFile).
-		WithTLSSettings(insecureSkipTLSVerify, caCert).Build()
-	if err != nil {
-		return errors.WithStack(err)
+		cfg.Region = region
 	}
 
 	client, err := newS3Client(cfg, s3URL, s3ForcePathStyle)