libvirt users - Oct 2018 - How to change the default connection of 'virsh' tool from 'qemu' to 'xen' ?

Hi.

Thanks to help of this mailing list (especially Jim Fehlig), I have
finished setup of libvirt.
However, there is something weird. It is that I installed libvirt on 5
servers but
the default connection of one of them is 'qemu:///' even if those of the
others are all 'xen:///'.

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.

Thanks.

On Wed, 2018-10-31 at 10:56 +0900, Minjun Hong wrote:
> Hi.
> 
> Thanks to help of this mailing list (especially Jim Fehlig), I have
finished setup of libvirt.
> However, there is something weird. It is that I installed libvirt on 5
servers but
> the default connection of one of them is 'qemu:///' even if those
of the others are all 'xen:///'.
You probably installed the QEMU driver on that one server only: if
that's indeed the case, the easiest way to fix the inconsistency
would be to uninstall it.

If that fails...
> 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.

-- 
Andrea Bolognani / Red Hat / Virtualization

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:
>> Hi.
>>
>> Thanks to help of this mailing list (especially Jim Fehlig), I have
finished setup of libvirt.
>> However, there is something weird. It is that I installed libvirt on 5
servers but
>> the default connection of one of them is 'qemu:///' even if
those of the others are all 'xen:///'.
>
>You probably installed the QEMU driver on that one server only: if
>that's indeed the case, the easiest way to fix the inconsistency
>would be to uninstall it.
>
>If that fails...
>
>> 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.
>--
>Andrea Bolognani / Red Hat / Virtualization
>
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