Public bug reported: 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. ** Affects: ubuntu Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1976436 Title: sshd is reloaded immediately after start in the google 18.04 image To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1976436/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
