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

[Alexander Zeidler <a.zeidler@proxmox.com>]

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@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',
-- 
2.39.2



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