Merge branch 'release/3.0.5'

CHANGELOG.md

@@ -5,6 +5,12 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this
 project adheres to [Semantic Versioning](http://semver.org/).
 
 
+## [3.0.5] - 2018-09-03
+### Fixed
+- Bad S3 credentials now immediately return an error from NewS3Accessor(),
+  instead of allowing you to proceed to an un-usable mount.
+
+
 ## [3.0.4] - 2018-08-18
 ### Fixed
 - Critical fix for potential silent errors when reading from an overloaded

s3.go

@@ -270,6 +270,13 @@ func NewS3Accessor(config *S3Config) (*S3Accessor, error) {
 		// minio-go or ceph gets bugfixed to avoid this...
 		a.client, err = minio.NewV2(host, config.AccessKey, config.SecretKey, secure)
 	}
+
+	// test that the client actually works (credentials are ok?)
+	_, err = a.ListEntries("/")
+	if err != nil {
+		err = fmt.Errorf("could not access S3: %s", err)
+	}
+
 	return a, err
 }