lib/backup: cosmetic fixes after #243

app/vmbackup/README.md

@@ -6,6 +6,7 @@ Supported storage systems for backups:
 
 * [GCS](https://cloud.google.com/storage/). Example: `gcs://<bucket>/<path/to/backup>`
 * [S3](https://aws.amazon.com/s3/). Example: `s3://<bucket>/<path/to/backup>`
+* Any S3-compatible storage such as [MinIO](https://github.com/minio/minio). See `-customS3Endpoint` command-line flag.
 * Local filesystem. Example: `fs://</absolute/path/to/backup>`
 
 Incremental backups and full backups are supported. Incremental backups are created automatically if the destination path already contains data from the previous backup.
@@ -129,13 +130,13 @@ Run `vmbackup -help` in order to see all the available options:
   -configFilePath string
     	Path to file with S3 configs. Configs are loaded from default location if not set.
     	See https://docs.aws.amazon.com/general/latest/gr/aws-security-credentials.html
+  -configProfile string
+    	Profile name for S3 configs (default "default")
   -credsFilePath string
     	Path to file with GCS or S3 credentials. Credentials are loaded from default locations if not set.
     	See https://cloud.google.com/iam/docs/creating-managing-service-account-keys and https://docs.aws.amazon.com/general/latest/gr/aws-security-credentials.html
-  -configProfile string
-    	Profile name for S3 configs.  (default "default")
   -customS3Endpoint string
-    	Custom S3 endpoint for use with S3-compatible storages (e.g. MinIO)
+    	Custom S3 endpoint for use with S3-compatible storages (e.g. MinIO). S3 is used if not set
   -dst string
     	Where to put the backup on the remote storage. Example: gcs://bucket/path/to/backup/dir, s3://bucket/path/to/backup/dir or fs:///path/to/local/backup/dir
     	-dst can point to the previous backup. In this case incremental backup is performed, i.e. only changed data is uploaded

app/vmrestore/README.md

@@ -40,13 +40,13 @@ Run `vmrestore -help` in order to see all the available options:
   -configFilePath string
     	Path to file with S3 configs. Configs are loaded from default location if not set.
     	See https://docs.aws.amazon.com/general/latest/gr/aws-security-credentials.html
+  -configProfile string
+    	Profile name for S3 configs (default "default")
   -credsFilePath string
     	Path to file with GCS or S3 credentials. Credentials are loaded from default locations if not set.
     	See https://cloud.google.com/iam/docs/creating-managing-service-account-keys and https://docs.aws.amazon.com/general/latest/gr/aws-security-credentials.html
-  -configProfile string
-    	Profile name for S3 configs.  (default "default")
   -customS3Endpoint string
-    	Custom S3 endpoint for use with S3-compatible storages (e.g. MinIO)
+    	Custom S3 endpoint for use with S3-compatible storages (e.g. MinIO). S3 is used if not set
   -loggerLevel string
     	Minimum level of errors to log. Possible values: INFO, ERROR, FATAL, PANIC (default "INFO")
   -maxBytesPerSecond int

lib/backup/actions/util.go

@@ -18,8 +18,8 @@ var (
 		"See https://cloud.google.com/iam/docs/creating-managing-service-account-keys and https://docs.aws.amazon.com/general/latest/gr/aws-security-credentials.html")
 	configFilePath = flag.String("configFilePath", "", "Path to file with S3 configs. Configs are loaded from default location if not set.\n"+
 		"See https://docs.aws.amazon.com/general/latest/gr/aws-security-credentials.html")
-	configProfile    = flag.String("configProfile", "default", "Profile name for S3 configs. ")
-	customS3Endpoint = flag.String("customS3Endpoint", "", "Custom S3 endpoint for use with S3-compatible storages (e.g. MinIO)")
+	configProfile    = flag.String("configProfile", "default", "Profile name for S3 configs")
+	customS3Endpoint = flag.String("customS3Endpoint", "", "Custom S3 endpoint for use with S3-compatible storages (e.g. MinIO). S3 is used if not set")
 )
 
 func runParallel(concurrency int, parts []common.Part, f func(p common.Part) error, progress func(elapsed time.Duration)) error {

lib/backup/s3remote/s3.go

@@ -21,7 +21,7 @@ type FS struct {
 	// Path to S3 credentials file.
 	CredsFilePath string
 
-	// Pat to S3 configs file.
+	// Path to S3 configs file.
 	ConfigFilePath string
 
 	// GCS bucket to use.
@@ -30,10 +30,14 @@ type FS struct {
 	// Directory in the bucket to write to.
 	Dir string
 
-	s3             *s3.S3
-	uploader       *s3manager.Uploader
+	// Set for using S3-compatible enpoint such as MinIO etc.
 	CustomEndpoint string
-	ProfileName    string
+
+	// The name of S3 config profile to use.
+	ProfileName string
+
+	s3       *s3.S3
+	uploader *s3manager.Uploader
 }
 
 // Init initializes fs.
@@ -63,7 +67,6 @@ func (fs *FS) Init() error {
 	}
 
 	if len(fs.CustomEndpoint) > 0 {
-
 		// Use provided custom endpoint for S3
 		logger.Infof("Using provided custom S3 endpoint: %q", fs.CustomEndpoint)
 		sess.Config.WithEndpoint(fs.CustomEndpoint)
@@ -71,7 +74,6 @@ func (fs *FS) Init() error {
 		// Disable prefixing endpoint with bucket name
 		sess.Config.WithS3ForcePathStyle(true)
 	} else {
-
 		// Determine bucket region.
 		ctx := context.Background()
 		region, err := s3manager.GetBucketRegion(ctx, sess, fs.Bucket, "")