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Old 08-14-2014, 12:22 PM   #1
Envite
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Unhappy KVM machine crash


Hi all

Since http://www.linuxquestions.org/questi...op-4175510523/ I have been running KVM machines, by using libvirt.

One of them has almost no use, and the other one has almost permanent ssh -X connection and Kmail open.

This last machine crashes repeatedly, but not when I am ussing it heavily, but at random times.

I find nothing in /var/log/syslog in host nor in guest.

How can I know why the machine crashes?

Thanks
 
Old 08-14-2014, 02:34 PM   #2
jefro
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Might monitor top command. Not all processes report to /var. Some may have to be edited to allow reporting. I'd assume the system is fully crash.

May have to run mem or top on host. Increase swap or ram available to client.

Could be bad memory.

Are the clients identical in every way? Are they clones of each other?
 
Old 08-14-2014, 02:45 PM   #3
dyasny
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anything in syslog and messages before the crash? set up netconsole if you can't catch the crash logs
 
Old 08-14-2014, 02:52 PM   #4
Envite
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Hi

Nothing in syslog in any of them.

The clients are almost identical, just running a) Apache (doesn't crash) b) Kmail (crashes)

Memory availability seems not to be the problem.
 
Old 08-15-2014, 03:22 PM   #5
jefro
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Hard crashes tend to be mostly hardware in my experience. A vm has limited access to hardware in reality.

Might run memtest for a day or so.

Get a new vm set up exactly like you need and test it. Be sure to monitor system resources on both client and host.
 
  


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