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Re: [PATCH 3/3] docs: kbase: Port 'debuglogs' document from libvirt's wiki



On Mon, Aug 03, 2020 at 11:44:39 +0200, Kashyap Chamarthy wrote:
> On Thu, Jul 30, 2020 at 12:30:32PM +0200, Peter Krempa wrote:
> 
> (Probably this needs to be done in a separate patch from this Wiki->rST
> conversion, but a quick point inline.)

Yes.

> 
> [...]
> 
> > +How to turn on debug logs for libvirt
> > +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > +
> > +Persistent setting
> > +^^^^^^^^^^^^^^^^^^
> 
> [...]
> 
> > +
> > +   # LEGACY SETTINGS PRIOR LIBVIRT 4.4.0 SEE BELOW! #
> > +   log_level = 1
> > +   log_filters="1:qemu 3:remote 4:event 3:util.json 3:rpc"
> > +   log_outputs="1:file:/var/log/libvirt/libvirtd.log"
> > +
> > +::
> > +
> > +   # PREFERRED SETTINGS AFTER LIBVIRT 4.4.0 #
> > +   log_filters="3:remote 4:event 3:util.json 3:rpc 1:*"
> 
> The above "PREFERRED" settings doesn't capture QMP commands, does it?
> The '1:qemu' is supposed to do it.  

It has 1:* since after 4 it supports wildcats which is equivalent to
1:qemu.

> FWIW, after some debugging sessions with Dan Berrangé, I have been using
> the following filters:
> 
>     "1:libvirt 1:qemu 1:conf 1:security 3:event 3:json 3:file 3:object 1:util"

Didn't you debug a 4.4.0 or older libvirt?

> 
> Should the document be updated with the above filters?  (Assuming this
> set looks good to the reviewers.)


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