[pve-devel] [PATCH manager 7/7] report: add recent boot timestamps which may show fencing/crash events

[Mira Limbeck]

On 4/18/24 11:16, Alexander Zeidler wrote:
> Successful boots which crashed somehow and sometime afterwards, will
> show the same "until" value ("still running" or timestamp) as the next
> following boot(s). The most recent boot from such a sequence of
> duplicated "until" lines, has not been crashed or not yet.
> 
> Example output where only the boot from 16:25:41 crashed:
>  reboot system boot 6.5.11-7-pve Thu Apr 11 16:31:24 2024 still running
>  reboot system boot 6.5.11-7-pve Thu Apr 11 16:29:17 2024 - Thu Apr 11 16:31:12 2024 (00:01)
>  reboot system boot 6.5.11-7-pve Thu Apr 11 16:25:41 2024 - Thu Apr 11 16:31:12 2024 (00:05)
>  ...
> 
> Furthermore, it shows the booted/crashed/problematic kernel version.
> 
> `last` is also used since currently `journalctl --list-boots` can take
> 10 seconds or even longer on some systems, with no option to limit the
> amount of reported boot lines.
> 
> Signed-off-by: Alexander Zeidler <a.zeidler at proxmox.com>
> ---
> v2:
> * move away from dmesg base
> * list also recent (5) boot timestamps with additional information
> 
> v1: https://lists.proxmox.com/pipermail/pve-devel/2024-March/062342.html
> 
> 
>  PVE/Report.pm | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/PVE/Report.pm b/PVE/Report.pm
> index d9f81a0f..c3abb776 100644
> --- a/PVE/Report.pm
> +++ b/PVE/Report.pm
> @@ -32,6 +32,7 @@ my $init_report_cmds = sub {
>  		'hostname',
>  		'date -R',
>  		'cat /proc/cmdline',
> +		'last reboot -F -n5',
>  		'pveversion --verbose',
>  		'cat /etc/hosts',
>  		'pvesubscription get',

Do we want the reboot info that far up, even above the version output?
I'd say it's less interesting most of the time than the `pveversion` output.

And for uptime, we do have /cluster/resources and `top` which both show it.
Maybe it could be moved a bit further down? After /cluster/resources
could perhaps be a nice spot since it is (currently) followed by `top`?