[libvirt-users] How to change the default connection of 'virsh' tool from 'qemu' to 'xen' ?

[Andrea Bolognani]

On Thu, 2018-11-01 at 16:40 +0100, Erik Skultety wrote:
> On Wed, Oct 31, 2018 at 05:33:09PM +0100, Martin Kletzander wrote:
> > On Wed, Oct 31, 2018 at 09:32:30AM +0100, Andrea Bolognani wrote:
> > > On Wed, 2018-10-31 at 10:56 +0900, Minjun Hong wrote:
> > > > I searched how to change it but, I only found a bypass adding " LIBVIRT_DEFAULT_URI='xen:///' " in my .bashrc file.
> > > > Currently, value of the variable (LIBVIRT_DEFAULT_URI) is set to 'qemu:///'.
> > > > Since the bypass makes the virtualization type of the server visible 'qemu' to the open stack, I have to change libvirt configuration.
> > > > 
> > > > I also checked some configure files under '/etc/libvirt', such as libvirt.conf, libvirtd.conf and libxl.conf.
> > > > But I have no idea, how and what to change.
> > > > Please give me some advise. It will be a big help for me.
> > > 
> > > ... you can simply set
> > > 
> > >  uri_default = "xen:///"
> > > 
> > > in /etc/libvirt/libvirt.conf to change the system-wide default URI
> > > without having to mess with environment variables.
> > 
> > Or in .config/libvirt/libvirt.conf for a non-root user.
> 
> Alternatively, you can set the following env variable in your .bashrc to the
> desired URI:
> 
> LIBVIRT_DEFAULT_URI

... Which, as you can see above, is exactly what OP is already doing
and what they're looking for an alternative to ;)

Also note that, at least as far as I understand, they want to make
sure the xen:/// default URI is picked up by an high-level management
application (in this case OpenStack), which suggests the new default
should be set globally rather than per-user, which is the reason why
I didn't mention the approach Martin suggested.

I still believe the best solution is to just uninstall the QEMU
driver so that everything will work as expected without having to
mess with configuration files at all.

Let's wait for OP to try either approach out and report back :)

-- 
Andrea Bolognani / Red Hat / Virtualization