Re: Vanilla Xen total CPU %

[Andy Smith <andy@xxxxxxxxxxxxxx>]

Hi,

> > On Jun 8, 2020, at 12:58 PM, Nick Calvert 
> > <nick.calvert@simplyhosting.cloud> wrote:
> > What I was trying to do was stream some of the xentop counters
> > into a time series database  (influxdb) so I could graph this.

I wanted to do this too, but for Prometheus.

I wrote a libxl C program that prints out the CPU time used by each
guest in Prometheus's exposition format¹. That would be just the
cumulative time in seconds because Prometheus likes things in its
base units, and you can derive percentages and rates from that.

I just trigger it by cron every 5 minutes and use it as a
node_exporter textfile collector², but I guess if I wanted it at a
shorter interval I'd make it into a proper exporter from a
standalone daemon.

If anyone would find it useful I can publish it, though my C is
terrible…

Cheers,
Andy

¹ 
https://github.com/prometheus/docs/blob/master/content/docs/instrumenting/exposition_formats.md

² 
https://github.com/prometheus-community/node-exporter-textfile-collector-scripts