[PVE-User] OpenVZ Bug?

CDR venefax at gmail.com
Thu Jan 21 18:32:40 CET 2010


The  bug is not in the paid version of OpenVZ, virtuozzo. I just tested it.
Could you please elaborate on what those stats mean, and why it is important
to monitor them?
I run the script for the server as a whole and it also is consistent.
Federico

On Thu, Jan 21, 2010 at 2:49 AM, Marc Aymerich <glicerinu at gmail.com> wrote:

> Hi all!
>
> I'm using Proxmox VE1.3 and while i was trying to figure out the
> reason of abnormal cpu results from one of my Nagios checks I found a
> bug on openvz. Around 5% of the times that you check /proc/stat it
> gives a wrong value of the ILDE and/or IO cpu ticks (top, vmstat, ps
> uses it). This only happens inside a container.
>
> I don't know if it is related only to this Proxmox version or it's a
> general openvz bug. Before reporting the bug to the openvz bugzilla i
> would like someone running the newer version of Proxmox to try to
> reproduce it to ensure it is not only related to proxmox VE1.3.
>
> If you are interested on it you can try to execute this code inside
> one of yours containers, (preferably one with some load)
>
> while true; do cat /proc/stat |head -n1|awk {'print $5 " " $6'}; sleep 1;
> done
>
> it shows ILDE and IO cpu ticks stored in /proc/stat every 1 second. If
> you're afected with the bug you'll see something like that:
>
> ...
> 6646470921 23857
> 6646471423 23857
> 6646471924 23857
> 6646470921 23857
> 6646471423 23857
> 6646471924 23857
> 6646470921 23857
> 6646471423 23857
> 6646471924 23857
> 6646470921 23857
> 6646471423 23857
> 6646471924 23857
> 167687 23857 <- wrong value
> 6646472928 23857
> 6646473430 23857
> 6646473932 23857
> 6646474433 23857
> 6646474935 23857
> 6646475437 23857
> 6646475939 23857
> 167687 6646332610 <- wrong value
> 167687 6646333112 <- wrong value
> 6646477444 23857
> 6646477946 23857
> ....
> On another container:
> ...
> 91704735 58747
> 91705238 58747
> 91705740 58747
> 91706243 58747
> 91706745 58747
> 217545 91548449 <- wrong value
> 91707749 58747
> 91708252 58747
> 91708754 58747
> 91709256 58747
> 91709759 58747
> 91710261 58747
> 217545 91551966 <- wrong value
> 91711266 58747
> 91711769 58747
> 217545 91553473 <- wrong value
> 91712773 58747
> 91713276 58747
> 217545 91554981 <- wrong value
> 91714281 58747
> 91714784 58747
> 91715286 58747
> 91715788 58747
> 91716291 58747
> ....
>
> It happens randomly, so you may need to wait one or two minutes. Be patient
> :)
> And thank you very much!!
>
> --
> Marc
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>
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