test/s3: Retry connection to Minio server

src/restic/backend/s3/s3_test.go

@@ -103,6 +103,21 @@ type MinioTestConfig struct {
 	stopServer    func()
 }
 
+func openS3(t testing.TB, cfg MinioTestConfig) (be restic.Backend, err error) {
+	for i := 0; i < 10; i++ {
+		be, err = s3.Open(cfg.Config)
+		if err != nil {
+			t.Logf("s3 open: try %d: error %v", i, err)
+			time.Sleep(500 * time.Millisecond)
+			continue
+		}
+
+		break
+	}
+
+	return be, err
+}
+
 func newMinioTestSuite(ctx context.Context, t testing.TB) *test.Suite {
 	return &test.Suite{
 		// NewConfig returns a config for a new temporary backend that will be used in tests.
@@ -127,7 +142,7 @@ func newMinioTestSuite(ctx context.Context, t testing.TB) *test.Suite {
 		Create: func(config interface{}) (restic.Backend, error) {
 			cfg := config.(MinioTestConfig)
 
-			be, err := s3.Open(cfg.Config)
+			be, err := openS3(t, cfg)
 			if err != nil {
 				return nil, err
 			}