expose env var for orbit enrollment retry interval (#12991)

server/service/orbit_client.go

@@ -202,7 +202,7 @@ func (oc *OrbitClient) getNodeKeyOrEnroll() (string, error) {
 				return err
 			}
 		},
-		retry.WithInterval(constant.OrbitEnrollRetrySleep),
+		retry.WithInterval(OrbitRetryInterval()),
 		retry.WithMaxAttempts(constant.OrbitEnrollMaxRetries),
 	); err != nil {
 		return "", fmt.Errorf("orbit node key enroll failed, attempts=%d", constant.OrbitEnrollMaxRetries)
@@ -292,3 +292,14 @@ func (oc *OrbitClient) setLastRecordedError(err error) {
 
 	oc.lastRecordedErr = fmt.Errorf("%s: %w", time.Now().UTC().Format("2006-01-02T15:04:05Z"), err)
 }
+
+func OrbitRetryInterval() time.Duration {
+	interval := os.Getenv("FLEETD_ENROLL_RETRY_INTERVAL")
+	if interval != "" {
+		d, err := time.ParseDuration(interval)
+		if err == nil {
+			return d
+		}
+	}
+	return constant.OrbitEnrollRetrySleep
+}