[PVE-User] base system restarted

Muhammad Yousuf Khan sirtcp at gmail.com
Thu Jul 5 16:24:13 CEST 2012

Thanks. its been very helpful.

On Thu, Jul 5, 2012 at 6:23 PM, Matthew Caron <Matt.Caron at redlion.net> wrote:
> On 07/04/2012 03:01 AM, Muhammad Yousuf Khan wrote:
>> i am very new to Linux and i am sorry if it is a very beginner  level
>> question i would request for your help and cooperation. i am using PVE
>> 1.9  on 3 servers. one of my base system which was unexpectedly
>> restarted or may be hanged (i dont know). but it didn't show the
>> display then i press the power button it restarted and ping was also
>> unresponsive.
> Were the keyboard LED's flashing?
> It sounds like you had a hard clock, crash, or kernel panic. The primary
> issue with relying on logs to find the problem is that often, the log
> message gets logged but then the system locks, so it never gets written to
> disk.
> One of the old-school tricks on how to monitor this is to set the console to
> be on a serial port and hook it to a dumb terminal or another PC via serial
> cable. That way, the logged output goes to the other machine and is captured
> as soon as it is printed.
> Indeed, it was/is quite common to have a machine called a "console server"
> which has a squidlike arrangement of serial cables going to serial ports on
> each server in a cluster. This gives one diagnostic output, plus a "hard"
> console dating from the days before KVMs. In modern times, this has been
> eclipsed by KVMs or remote management add-in cards (which often still appear
> to be a serial console, so if you have a machine with a remote management
> card, I would consult its documentation to see if it offers any
> functionality which may be useful here).
> A corollary to this is to have it dump to a line printer, which are somewhat
> hard to find these days.
> --
> Matthew Caron, Build Engineer
> Sixnet, a Red Lion business | www.sixnet.com
> +1 (518) 877-5173 x138 office
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