gcp: fixed OS Login enabling

[tormath1]

Noticed in logs:

Nov 20 19:28:42.573152 enable-oslogin[1122]: /etc/ssh/sshd_config does not include configuration snippets in /etc/ssh/sshd_config.d. Not enabling OS Login

The check:

scripts/sdk_container/src/third_party/coreos-overlay/coreos-base/oem-gce/files/bin/enable-oslogin

Lines 21 to 23 in 0d6e3aa

	if ! grep --fixed-strings --no-messages --silent 'Include "/etc/ssh/sshd_config.d/*.conf"' '/etc/ssh/sshd_config'; then
	echo '/etc/ssh/sshd_config does not include configuration snippets in /etc/ssh/sshd_config.d. Not enabling OS Login'
	exit 0

is not passing because of the duplicate /:

$ sudo cat /etc/ssh/sshd_config | grep Include
# Make sure that all Match options are below this Include!
Include "//etc/ssh/sshd_config.d/*.conf"

Testing done

• CI: http://192.168.42.7:8080/job/container/job/packages_all_arches/3029/cldsv/
• Changelog entries added in the respective changelog/ directory (user-facing change, bug fix, security fix, update)
• Inspected CI output for image differences: /boot and /usr size, packages, list files for any missing binaries, kernel modules, config files, kernel modules, etc.

[tormath1]

Looks better but now getting:

Nov 30 13:28:41.819250 enable-oslogin[1232]: /etc/pam.d/sshd already exists. Not enabling OS Login

[github-actions]

Build action triggered: https://github.com/flatcar/scripts/actions/runs/7061211572

[pothos]

A backport to Beta would be good

[tormath1]

Looks better but now getting:

Nov 30 13:28:41.819250 enable-oslogin[1232]: /etc/pam.d/sshd already exists. Not enabling OS Login

This line was not displayed on the first run of the unit, so it works correctly now - added a RemainAfterExit that sould prevent the unit to be restarted a few time (this is done in #1441 too)

[tormath1]

backported to:

• flatcar-3794
• flatcar-3760