[Linux-ha-dev] live migration of virtual Xen domains

[Sebastian Reitenbach]

Hi,

> >I changed Xen_Start/Xen_Stop functions in the Xen OCF resource 
> >script. The Xen_start now makes a xm mem-set to already 
> >running machines, to shrink the memory of these to make sure 
> >the new domain will be able to start. 
> >In Xen_stop I did sth. similar. xm mem-set is called, after 
> >the domain is stpped, to raise the memory for the remaining 
> >virtual domains.
> >So far, after some tests, this works well.
> >
> >Now the hard part is live migration. On live migration, the 
> >virtual node is not stopped when transferred between two 
> >nodes. This work well as long as on the destination host is 
> >enough free memory available. Is there a possibility on the 
> >source host to figure out how many memory is available on the 
> >destination host? Or any other idea?
> 
> There is the XenAPI (or alike) that allows local and remote management.
> I didn't use it (only just got it running a bit), but it seems to be
> what you need.
> 
> <http://wiki.xensource.com/xenwiki/XenApi>
> 
> However, the API is not stable, according to the website.
Nevertheless, it looks interesting, I need to take a closer look.

thanks
Sebastian