9:59 a.m.
Hello
I found under networking in the Domain XML 'Multcast tunnel'.
My question is does anyone know what is the intended use of multicast tunnel
networking?What are the potential pitfalls of using such a configuration other than
what's highlighted in the domain xml. eg: can it suffer from throughput issues? Can
the tunnel be accessed from outside Libvirt?
I'm struggling to find any information about it. If anyone has any information about
it, Or where I can obtain such information it would be appreciated.
Regards
Richard
5:58 a.m.
On Sat, Nov 30, 2019 at 03:59:54PM +0000, Richard M wrote:
Hello
I found under networking in the Domain XML 'Multcast tunnel'.
My question is does anyone know what is the intended use of multicast
tunnel networking?What are the potential pitfalls of using such a
configuration other than what's highlighted in the domain xml. eg:
can it suffer from throughput issues? Can the tunnel be accessed from
outside Libvirt?
I'm struggling to find any information about it. If anyone has any
information about it, Or where I can obtain such information it would
be appreciated.
This is something that has been supported by QEMU forever, but I think
it is fair to say it is rarely used.
The main use case would be setting up network communication between
a group in QEMU instances (possibly across hosts) in a case where you
don't have access to any better technology such as tap device + bridging.
eg if you are an unprivileged user & cannot get root.
I doubt performance is going to be anything special. There's also
no meaningful security - any user or process or host can send &
receive on the same multicast address.
Regards,
Daniel
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3:50 a.m.
New subject: [libvirt-users] Live migrate with virsh migrate
When I migrate a guest from svr1 to svr2 and shutdown the guest on svr2.
I cannot start it anymore because the xml is not there. How can I make
sure this xml is automatically stored so I can start the guest again on
svr2?
5:37 a.m.
New subject: [libvirt-users] Live migrate with virsh migrate
On Tue, Dec 03, 2019 at 10:50:42 +0100, Marc Roos wrote:
When I migrate a guest from svr1 to svr2 and shutdown the guest on svr2.
I cannot start it anymore because the xml is not there. How can I make
sure this xml is automatically stored so I can start the guest again on
svr2?
virsh migrate --help says:
--persistent persist VM on destination
that will make sure that the config will stay on the destination after
you turn off the VM
7:15 a.m.
New subject: [libvirt-users] Live migrate with virsh migrate
:0 forgot indeed to check the manpage, sorry
-----Original Message-----
Cc: libvirt-users
Subject: Re: [libvirt-users] Live migrate with virsh migrate
On Tue, Dec 03, 2019 at 10:50:42 +0100, Marc Roos wrote:
When I migrate a guest from svr1 to svr2 and shutdown the guest on
svr2.
I cannot start it anymore because the xml is not there. How can I
make
sure this xml is automatically stored so I can start the guest again
on svr2?
virsh migrate --help says:
--persistent persist VM on destination
that will make sure that the config will stay on the destination after
you turn off the VM
1846
days inactive
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4 comments
4 participants
participants (4)
-
Daniel P. Berrangé -
Marc Roos -
Peter Krempa -
Richard M