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[Paul White <1976436@xxxxxxxxxxxxxxxxxx>]

Thank you for taking the time to report this bug and helping to make
Ubuntu better. We are sorry that we do not always have the capacity to
review all reported bugs in a timely manner.

Ubuntu 18.04 (bionic) reached end-of-standard-support on May 31, 2023.

I'm setting the status of this bug to 'Incomplete' as it's not seen any
activity for some time. If this is still an issue when using a currently
maintained release of Ubuntu then please let us know which one(s)
otherwise this bug report can be left to expire in approximately 60 days
time.

** Tags added: bionic

** Changed in: ubuntu
       Status: New => Incomplete

** Changed in: google-guest-agent (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1976436

Title:
  sshd is reloaded immediately after start in the google 18.04 image

Status in Ubuntu:
  Incomplete
Status in google-guest-agent package in Ubuntu:
  Incomplete

Bug description:
  In recent published 18.04 images for Google Cloud, sshd is reloaded by
  systemd immediately after it is started.

  The images I'm using are sourced from https://cloud-images.ubuntu.com/locator/.
  I've found this issue in ubuntu-1804-bionic-v20220505 and ubuntu-1804-bionic-v20220419. 
  The image ubuntu-1804-bionic-v20210129 does not have the issue (sshd is not reloaded).
  I have not tested intermediate versions.

  The specific version attributes are:
  Cloud=Google Compute Engine
  Zone=us-west2
  Name=bionic
  Version=18.04
  Arch=amd64
  Instance Type=kvm

  Here's a snippet from the syslog of an image affected by this bug:

  =================================
  systemd[1]: Starting Login Service...
  systemd-logind[2057]: Watching system buttons on /dev/input/event0 (Power Button)
  systemd-logind[2057]: Watching system buttons on /dev/input/event1 (Sleep Button)
  systemd-logind[2057]: Watching system buttons on /dev/input/event2 (AT Translated Set 2 keyboard)
  systemd-logind[2057]: New seat seat0.
  systemd[1]: Started Login Service.
  systemd[1]: Stopping Regular background program processing daemon...
  systemd[1]: Stopped Regular background program processing daemon.
  systemd[1]: Started Regular background program processing daemon.
  cron[2066]: (CRON) INFO (pidfile fd = 3)
  cron[2066]: (CRON) INFO (Skipping @reboot jobs -- not system startup)
  GCEGuestAgent[1899]: 2022-06-01T01:09:28.4626Z GCEGuestAgent Error oslogin.go:109: Error restarting service: Failed to try-restart crond.service: Unit crond.service not found.
                       .
  google_guest_agent[1899]: 2022/06/01 01:09:28 logging client: rpc error: code = Unauthenticated desc = transport: metadata: GCE metadata "instance/service-accounts/default/token?scopes=https%3A%2F%2Fwww.googleapis.com%2Fauth%2Flogging.write" not defined
  pollinate[2093]: [1.0K blob data]
  systemd[1]: Started Pollinate to seed the pseudo random number generator.
  systemd[1]: Starting OpenBSD Secure Shell server...
  sshd[2108]: Server listening on 0.0.0.0 port 22.
  sshd[2108]: Server listening on :: port 22.
  systemd[1]: Started OpenBSD Secure Shell server.
  systemd[1]: Reloading OpenBSD Secure Shell server.
  sshd[2108]: Received SIGHUP; restarting.
  systemd[1]: Reloaded OpenBSD Secure Shell server.
  sshd[2108]: Server listening on 0.0.0.0 port 22.
  sshd[2108]: Server listening on :: port 22.
  systemd[1]: Reloading.
  systemd[1]: Reloading.
  ================================

  The line of importance to me is "systemd[1]: Reloading OpenBSD Secure Shell server."
  This is in contrast to the first boot of an older, unaffected image, where no reloading is observed:

  ================================
  google-accounts[1795]: INFO Creating a new user account for admin.
  google_accounts_daemon[1795]: useradd: group admin exists - if you want to add this user to that group, use -g.
  useradd[1893]: failed adding user 'admin', data deleted
  google-accounts[1795]: WARNING Could not create user admin. Command '['useradd', '-m', '-s', '/bin/bash', '-p', '*', 'admin']' returned non-zero exit status 9..
  google-clock-skew[1791]: INFO Synced system time with hardware clock.
  pollinate[1923]: [1.0K blob data]
  systemd[1]: Started Pollinate to seed the pseudo random number generator.
  systemd[1]: Starting OpenBSD Secure Shell server...
  sshd[1945]: Server listening on 0.0.0.0 port 22.
  sshd[1945]: Server listening on :: port 22.
  systemd[1]: Started OpenBSD Secure Shell server.
  systemd[1]: Reloading.
  systemd[1]: Reloading.
  ================================

  Note that the new image has swapped to using google_guest_agent
  instead of google_accounts_daemon, and that google_guest_agent prints
  an error message directly before the reload. I don't know if that is
  related.

  This bug is impactful to me as I cannot safely "just" wait for SSH to
  be online in scripts before proceeding.

  This bug should be observable in the aforementioned images on first
  boot with no modifications.

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