Hi,
I've got a stand-alone SmartOS/Triton hypervisor that's been having some
unscheduled, seemingly random, reboots. This feels more core though
which is why I'm raising it here rather than the SmartOS ML.
This is a custom build of SmartOS 20220310T004022Z. The two changes we
apply are to SEGPDEFSIZE (to 8G) and PORT_DEFAULT_PORTS (to 0x08000).
This image is running without any issue on multiple other machines.
There is no evidence of anything in either syslog, messages, auth.log
nor the BMC logs. There is nothing in /var/crash. fmadm faulty is
clean both before and after.
There is however some weird logging in last where it appears as if the
system went down, or was told to go down, hours before it happened.
Entries like:
reboot system boot Thu Jun 8 00:22
reboot system down Wed Jun 7 15:49
and
reboot system boot Sat May 27 23:58
reboot system down Fri May 26 13:30
Both these reboots actually occurred a minute or so before the system
boot timestamp so the reboots only took a minute and there was no
end-user impact at that time of night. The system is just over a year
old and the BMC logs show good time and a scheduled shutdown and boot
logged the correct time so I've no reason to think it's a BIOS battery
or hardware clock issue.
I wondered if this could happen if someone scheduled a reboot with a
long timeout on a shutdown command (and did it for the GZ rather than a
zone by accident) but I've been unable to replicate the last entries in
my experiments with both /usr/sbin/shutdown nor /usr/ucb/shutdown. One
of the shutdowns came close as it didn't leave any log evidence but
didn't replicate those weird last entries.
Has anyone seen this before?
Thanks,
Jon
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