Re: [Xen-users] XEN and Live Migration

[Jamon Camisso <jamonation@xxxxxxxxx>]

Joseph Coleman wrote:
> I am trying to get live migration working on SLES11. I went in and uncommented 
> out the following from /etc/xen/xend-config.sxp
>
> (xend-relocation-port 8002)
> (xend-relocation-address '')
> (xend-relocation-hosts-allow)
> Then performed a rcxend restart on both nodes however, when I run:
>
> xm migrate --live test4 vmc1n1
>
> I get the following error:
>
> vmc1n4:~ # xm migrate --live test4 vmc1n1
> Error: /usr/lib64/xen/bin/xc_save 21 5 0 0 5 failed
> Usage: xm migrate <Domain> <Host>
>
> Can anyone help me not sure what I am missing or if I am doing wrong.. I am 
> using a shared NFS volume which is were the VM'S are stored /var/campusVM
Try explicitly adding hosts to the xend-relocation-hosts-allow line. By 
default an empty line should allow any host to connect, but I've found 
better luck adding hosts there manually. So if your current host is 
vmc1n0, on the target vmc1n1 you'd add:
(xend-relocation-hosts-allow '^vmc1n0$')

The regex notation is mandatory. For multiple hosts, put then inside the 
single set of '' with no commas separating them, e.g. '^vmc1n0$ ^vmc1n2$ 
^vmc1n3$'.
Also put an IP in the xend-relocation-address line. It doesn't hurt to 
be explicit with everything in xend-config.sxp.
Finally, check iptables, and watch xend.log on both hosts. It will show 
where the migration failed. If adding those options doesn't help, it 
will at least get you further and throw a different error :)
Regards, Jamon

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