Automatic Restarts

Container-Optimized OS will automatically update itself, but the update will only be applied after a reboot. In order to ensure that you are using the most current operating system software, you can set a boot script that waits until an update has been applied to schedule a reboot.

Before you start, ensure you have compute-rw scope for your bitwarden compute vm. If you used the gcloud command above, it includes that scope. If not, go to your Google Cloud console and edit the "Cloud API access scopes" to have "Compute Engine" show "Read Write". You need to shut down your compute vm in order to change this.

Modify the script to set your local timezone and the time to schedule reboots: set the TZ= and TIME= variables in utilities/reboot-on-update.sh. By default the script will schedule reboots for 06:00 UTC.

From within your compute vm console, type the command toolbox. From within toolbox, find the utilities folder within bitwarden_gcloud. toolbox mounts the host filesystem under /media/root, so go there to find the folder. It will likely be in /media/root/home/<google account name>/bitwarden_gcloud/utilities - cd to that folder.

Next, use gcloud to add the reboot-on-update.sh script to your vm's boot script metadata with the add-metadata command:

gcloud compute instances add-metadata <instance> --metadata-from-file startup-script=reboot-on-update.sh

You can confirm that your startup script has been added in your instance details under "Custom metadata" on the Compute Engine Console.

Next, restart your vm with the command $ sudo reboot. Once your vm has rebooted, you can confirm that the startup script was run with the command:

$ sudo journalctl -u google-startup-scripts.service

Now the script will wait until a reboot is pending and then schedule a reboot for the time configured in the script.