[one-users] Incorrect VM monitoring

[Antonio Carlos Salzvedel Furtado Junior]

I noticed it too when using KVM. In my case the CPU parameter was
incorrect. Let's say the Memory parameter was "correct", although it only
prints the maximum amount of memory that can be allocated to a VM. It does
not consider any information about the Virtio baloon driver, so I think
this monitoring is kind of pointless. If I go to the Qemu Monitor and
inflate the baloon, OpenNebula will still say that I have the same amount
of memory.


In order to test the CPU parameter, I stressed the VM. As KVM treats the
VMs as normal processes, I just compared the OpenNebula results with the
top command. While top output the expected result, OpenNebula seemed to
print arbitrary numbers.

Cordially,

Antonio Carlos Furtado

On Thu, May 10, 2012 at 11:35 AM, Javier Alvarez <javier.alvarez at bsc.es>wrote:

> Hello,
>
> I'm running OpenNebula over Xen in a single machine and everything works
> fine, the VMs boot correctly and I can access them through SSH without
> problems. The only thing is that the monitoring doesn't seem to be working
> well because 'onevm list' doesn't show any CPU nor Memory in the VMs. Only
> after a while, in the Memory column it appears 1020.3M, which anyways is
> not the real value. Also, /proc/meminfo and /proc/cpuinfo in the VMs show
> the expected values, as well as running 'xm list' in Dom0.
>
> Is not a big issue, but I'm afraid it could cause other problems in the
> future.
>
> Thank you,
>
> Javi
>
> --
> Javier Álvarez Cid-Fuentes
> Grid Computing and Clusters Group
> Barcelona Supercomputing Center (BSC-CNS)
> Tel. (+34) 93 413 72 46
>
>
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