[libvirt-users] API for retrieving resource metrics from VMs?

[BYEONG-GI KIM]

Thank you for the reply!

I used the term "disk usage" as what you mentioned first; the information
which can be retrieved via 'df' command on linux system...

I'll then have to consider different approach to do what I want.

Anyway, thanks again for your great help.

Best regards

bgkim



2016-01-04 22:21 GMT+09:00 Michal Privoznik <mprivozn at redhat.com>:

> On 04.01.2016 01:19, BYEONG-GI KIM wrote:
> > Hello. I'm a new getting started to learn the libvirt API.
> >
> > I've tried to find APIs which retrieve resource metrics such as cpu,
> disk,
> > memory, and network I/O usages, but I could find few related thing; I was
> > intended to use libvirt-Java binding first, it seems I'd be better to use
> > the others like Python binding or C API though. The Java binding API is
> > likely to provide very limited API list comparing with the above APIs so
> > far.
> >
> > So, I'd like to know which APIs can retrieve that resources from VMs. I
> > don't care about the language, but I really want to know whether such
> APIs
> > even exists or not.
> >
> > As far as I know, cpu, memory, and network I/O seems being provided, but
> > I'm not sure disk usage per VMs can be obtained via libvirt API.
>
> I'm not sure what do you mean by 'disk usage'. You mean like 'how many
> bytes are used/free on a disk'? If so, I'm not sure libvirt can help. I
> mean it's dependent on guest configuration and you should use 'df' ran
> from within guest to retrieve that info. It falls out of libvirt's scope.
>
> If you, however, mean disk I/O - this can be obtained via
> virDomainBlockStatsFlags() API.
>
> Michal
>
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