[libvirt-users] Migration hangs on Gentoo with KVM

[Jonathan Stoppani]

On Aug 1, 2011, at 16:33 , Eric Blake wrote:

> [re-adding the list]

Sorry about that, still not used to mailman lists which don't put the list address in the reply-to field. ;-)

>> Thanks for the prompt answer Eric! Yes, nc has a q option:
>> 
>>  -q, --hold-timeout=SEC1[:SEC2]   Set hold timeout(s) for local [and remote]
> 
> Glad to hear that we found root cause to your problems, then.
> 
>> 
>> The bug specifically refers to ssh, does that mean that it should work over tcp?
> 
> The problem is that libvirt is trying to start a remote nc session over ssh; but looking at http://libvirt.org/remote.html, it looks like ssh is the only protocol using nc in that manner (so yes, you can probably avoid the issue by using tcp or tls).  Meanwhile, I think you can work around it without patching libvirt, by using this as your remote URI:
> 
> qemu+ssh://user@remotehost/system?netcat=/path/to/nc-wrapper
> 
> where nc-wrapper is an executable script installed on remotehost, looking like:
> 
> #!/bin/sh
> exec /path/to/real/nc -q0 "$@"

Just tried this, but still hangs; will try tcp and report the results.

~Jonathan