1:16 p.m.
Hello,
i wonder, if there's a possibility to change a name of a shared interface in
virtual machine config, while doing migration.
The problem is:
hypervisor1 (source) uses shared interface name "br0".
hypervisor2 (target) uses shared interface name "br500".
Live migration fails, because target hypervisor does not have "br0" interface.
Thank you
10:53 a.m.
On 03.06.2015 13:18, seitan wrote:
Hello,
i wonder, if there's a possibility to change a name of a shared interface in
virtual machine config, while doing migration.
The problem is:
hypervisor1 (source) uses shared interface name "br0".
hypervisor2 (target) uses shared interface name "br500".
Live migration fails, because target hypervisor does not have "br0" interface.
Thank you
Yes it is possible. The migration APIs have an argument @xmlin where you
can specify new XML definition for the domain on the destination. It
serves exactly this purpose where the environment there is slightly
different to the source.
Michal
8:06 p.m.
Hello,
On 03.06.2015 13:18, seitan wrote:
i wonder, if there's a possibility to change a name of a shared
interface in
virtual machine config, while doing migration.
The problem is:
hypervisor1 (source) uses shared interface name "br0".
hypervisor2 (target) uses shared interface name "br500".
Live migration fails, because target hypervisor does not have "br0" interface.
libvirt supports some hook scripts, which can be used to re-write the
XML file during live migration. Have a look at
<http://docs.univention.de/uvmm-4.0.html#uvmmext:kvm:migrate>;, which
should work similarly for your scenario.
Philipp
10:51 p.m.
On 06/10/2015 02:06 PM, Philipp Hahn wrote:
Hello,
On 03.06.2015 13:18, seitan wrote:
> i wonder, if there's a possibility to change a name of a shared interface in
> virtual machine config, while doing migration.
> The problem is:
> hypervisor1 (source) uses shared interface name "br0".
> hypervisor2 (target) uses shared interface name "br500".
> Live migration fails, because target hypervisor does not have "br0"
interface.
libvirt supports some hook scripts, which can be used to re-write the
XML file during live migration. Have a look at
<http://docs.univention.de/uvmm-4.0.html#uvmmext:kvm:migrate>;, which
should work similarly for your scenario.
In the general case of "I need to modify the XML" you can use migration
hooks to modify it, but in the case described in this question you don't
need to modify the XML. Instead, just create an unmanaged libvirt
network on each host, with the same network name, but each pointing to a
different bridge. Then the XML can remain the same.
This same question was also asked simultaneously on libvirt-users, but
in a separate message so the replies for that didn't come to this list.
It looks like the poster used some sort of web interface at gmane.org
which isn't smart enough to use the same message ID when crossposting.
Here is a pointer to my response in libvirt-users:
https://www.redhat.com/archives/libvirt-users/2015-June/msg00015.html
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3 comments
4 participants
participants (4)
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Laine Stump -
Michal Privoznik -
Philipp Hahn -
seitan