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Don't know about Cacti, but I use kvm munin plugins to monitor individual KVM guest CPU usage:
https://github.com/duritong/munin-contrib/tree/master/plugins/virtualization
Cacti is an awesome tool. I like it and PRTG personally.
We have managed to get it working. We have ours based on Virt-top. Which exports the data to cacti using some custom host templates and graphs.
I use cacti and nagios.
Both tools together are perfect for monitoring and logging
@Jun I think he means from node level not container level.
Yeah node level.
We made our own, it doesn't get the load though but it does get CPU usage in percentage.
That's what I'm looking for how much CPU each container is eating.
There was nothing that I found on the shelf that would do it, so I guess you will have to code one similar to what I did.
@FRCorey
Maybe this will help you create your own script that will output the values per container and feed it into Cacti:
http://serverfault.com/a/417307/76570
(although you will need to find the proper virt-top parameters)
I think munin-libvirt-plugin did that on munin. or a small work can convert it for cacti.