Re: [PATCH manager] report: list recent reboot events and their kernel version

[Thomas Lamprecht <t.lamprecht@proxmox.com>]

Am 20.07.26 um 14:38 schrieb Alexander Zeidler:
> Based on the most recent reboot events, it is possible to determine
> whether and when a crash, fencing, or reboot occurred and with which
> kernel version the node booted.
> 
> Use `wtmpdb last` as a replacement for the well-known `last`, since
> the latter became obsolete [0] with Debian Trixie / PVE 9.
> 
>  # wtmpdb last reboot --fulltimes --limit 5
>  reboot   system boot  7.0.14-5-pve     Mon Jul 20 14:22:34 2026 - still running
>  reboot   system boot  7.0.14-5-pve     Thu Jul 16 15:12:16 2026 - crash
>  reboot   system boot  7.0.14-5-pve     Thu Jul 16 11:20:15 2026 - Thu Jul 16 15:10:46 2026  (03:50)
>  reboot   system boot  7.0.14-5-pve     Wed Jul 15 13:39:34 2026 - crash
>  reboot   system boot  7.0.14-2-pve     Wed Jul 15 07:39:18 2026 - Wed Jul 15 13:38:04 2026  (05:58)
> 
>  wtmpdb begins Wed Jul 15 07:39:18 2026
> 
> [0] https://www.debian.org/releases/trixie/release-notes/issues.html#the-last-lastb-and-lastlog-commands-have-been-replaced
> 
> Signed-off-by: Alexander Zeidler <a.zeidler@proxmox.com>
> ---
>  PVE/Report.pm | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/PVE/Report.pm b/PVE/Report.pm
> index 29433d4a..6049c0bf 100644
> --- a/PVE/Report.pm
> +++ b/PVE/Report.pm
> @@ -36,6 +36,7 @@ my $init_report_cmds = sub {
>                  'hostname',
>                  'date -R',
>                  'cat /proc/cmdline',
> +                'wtmpdb last reboot --fulltimes --limit 5',

we nowhere depend on wtmpdb so it's not a given that it's installed.

For just the boots we could use "journalctl --list-boots -n 5 -r".
Depending on wtmpdb and writing yet another log file just for kernel version might
be a bit overkill, given that the info is there in the journal, albeit it *is*
annoying that we would have to manually parse them from the journal...


>                  'pveversion --verbose',
>                  'cat /etc/hosts',
>                  'pvesubscription get',