File gcei-scripts-after-reg.patch of Package google-compute-engine.7791
--- google_compute_engine_init/systemd/google-startup-scripts.service.orig 2018-05-05 00:52:49.000000000 +0200
+++ google_compute_engine_init/systemd/google-startup-scripts.service 2018-05-08 12:28:04.360644741 +0200
@@ -2,6 +2,7 @@
Description=Google Compute Engine Startup Scripts
After=local-fs.target network-online.target network.target rsyslog.service
After=google-instance-setup.service google-network-daemon.service
+After=guestregister.service
Wants=local-fs.target network-online.target network.target
[Service]