[libvirt] libvirt-qpid

[Ian Main]

On Mon, 6 Oct 2008 16:18:15 +0200
Daniel Veillard <veillard at redhat.com> wrote:

> On Fri, Oct 03, 2008 at 02:50:08PM +0100, Daniel P. Berrange wrote:
> > >   If then I install and start qpidd on machine B qpid-tool can connect
> > > to it ... but the already started libvirt-qpid don't seems to be
> > > able to find it, unless I restart it which seems to indicate a failure
> > > to connect after startup. And I'm still only able to list local
> > > domains/nodes never remote ones.
> > > 
> > >   Ideas ?
> > 
> > I got this working across 3 machines as follows
> > 
> >  - Machine A provides a Qpid broker, run as root with
> > 
> >        qpidd --auth no
> > 
> >  - Machine B and C are libvirt hosts, each run a libvirtd, and libvirt-qpid
> > 
> >        libvirt-qpid --broker machineA.example.com
> > 
> > 
> > On machine A, if you run 'qpid-tool' you should now see node, domain
> > objects from both machines B & C. NB, it take 5-10 seconds from 
> > starting libvirt-qpid before they appear in the broker
> 
>   I got this working it's just that my firewall rules on node A blocked
> access !
>   Basically one need to open TCP port 5672 on the machine running the
> QPid broker (and possibly 5671 when SSL auth is to be used once
> configured).
>   Also the simplest is to edit /etc/qpidd.conf on the broker node and
> add :
> 
> auth=no
> 
> then restart the broker with "/etc/init.d/qpidd restart"
> and on all the monitored nodes edit /etc/sysconfig/libvirt-qpid and
> add :
> 
> LIBVIRT_QPID_ARGS="--broker 192.168.0.11"
> 
> and also restart the libvirt-qpid service on them.
> Assuming the services gets started automatically all the nodes will
> connect automatically to the broker upon reboot without manual tuning.
> 
>    very cool !
> 
> I'm just wondering if there is any DNS customization trick which would
> allow the qpid client to automatically find the broker based on the DNS
> settings (things like _qpid._tcp SRV entries in the local domain). That
> would avoid the configuration on each monitored node.

Nice, glad you got it all working! :)

This is exactly how we do it in ovirt.. I posted a patch to use DNS
SRV entries and it just sets up the libvirt-qpid sysconfig file on each boot.

	Ian