mdcheck_start.service fails due to missing executable

[Rowan Wookey]

In Eoan the mdadm crons were replaced by systemd timers, specifically the one that checks the array now doesn't work due to a missing executable.

* Drop /etc/cron.d/mdadm and migrate to systemd mdcheck_start|continue timer units.

/lib/systemd/system/mdcheck_start.service contains this line

ExecStart=/usr/share/mdadm/mdcheck --duration $MDADM_CHECK_DURATION

However /usr/share/mdadm/mdcheck isn't in the mdadm package. It looks like this file wasn't added from the upstream sources.

[Rowan Wookey (rwky)]

This also effects Focal. Considering Focal is LTS and will run on servers with RAID arrays it'd be a good idea to fix this before release.

[Peter Kieser (pfak)]

Encountered this on two freshly installed Ubuntu 20.04 systems:

May 03 17:51:45 blackracer systemd[1]: Starting MD array scrubbing...
May 03 17:51:45 blackracer systemd[1394622]: mdcheck_start.service: Failed to execute command: No such file or directory
May 03 17:51:45 blackracer systemd[1394622]: mdcheck_start.service: Failed at step EXEC spawning /usr/share/mdadm/mdcheck: No such file or directory
May 03 17:51:45 blackracer systemd[1]: mdcheck_start.service: Main process exited, code=exited, status=203/EXEC
May 03 17:51:45 blackracer systemd[1]: mdcheck_start.service: Failed with result 'exit-code'.
May 03 17:51:45 blackracer systemd[1]: Failed to start MD array scrubbing.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Yurx Cherio (cherio-e)]

I have the same issue. My log entries:

May 03 10:21:29 host systemd[1]: Started MD array scrubbing - continuation.
May 03 10:21:29 host systemd[1]: Starting MD array scrubbing...
May 03 10:21:29 host systemd[3977]: mdcheck_start.service: Failed to execute command: No such file or directory
May 03 10:21:29 host systemd[3977]: mdcheck_start.service: Failed at step EXEC spawning /usr/share/mdadm/mdcheck: No such file or directory
May 03 10:21:29 host systemd[1]: mdcheck_start.service: Main process exited, code=exited, status=203/EXEC
May 03 10:21:29 host systemd[1]: mdcheck_start.service: Failed with result 'exit-code'.
May 03 10:21:29 host systemd[1]: Failed to start MD array scrubbing.

[Seth Arnold (seth-arnold)]

Hmm it doesn't look like it's packaged in another package, either:

$ apt-file search /usr/share/mdadm/mdcheck
$

And it doesn't appear to have just been moved out of /usr/share/:

$ apt-file search mdcheck | grep -v r-cran-rcmdcheck
mdadm: /lib/systemd/system/mdcheck_continue.service
mdadm: /lib/systemd/system/mdcheck_continue.timer
mdadm: /lib/systemd/system/mdcheck_start.service
mdadm: /lib/systemd/system/mdcheck_start.timer
$

[not here anymore (gralfe89-deactivatedaccount)]

I can confirm the bug on my fresh installation.

[brjhaverkamp (bert-bertenselena)]

Confirmation here too.