On Mon, 2010-01-04 at 14:19 +0000, Ahmad Hassan wrote:
> Dear All,
>
> We have set up a XEN testbed on AMD64 based cluster nodes. I would
> like to know the possible ways to monitor the activities of DomU's
> from Dom0. Is there any transparent way to monitor cpu usage and
> network traffic of DomU's at Dom0 level in order to ensure that SLA
> gurantees to each DomU.
>
> You help is much appreciated.
>
> Thanks.
>
> Regards, Hassan
Network traffic is easily monitored by making sure that you assign
static vifnames to guests. I.e. if your guest is named "vps-123", then
your network config might look like this:
vif = ['bridge = br0, mac = xx:xx:xx:..., vifname = vps-123.0',
'bridge = br1, mac = xx:xx:xx:..., vifname = vps-123.1' ]
... where vps-123.0 is the device to monitor (on dom-0) for eth0 in that
guest, vps-123.1 the one to monitor for eth1, etc .. etc.
After that, snmp takes care of logging if using something like cacti.
It becomes a little complicated if you tend to migrate guests from node
to node, but not unmanageable.
I'm not quite sure what kind of SLA you are backing with this. I can
produce graphs that tell people they have 100% of all 16 cores in a node
rather easily. Since its impossible for the customer to independently
verify, its hardly usable in a SLA claim. Unless I missed something?
Cheers,
--Tim
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