Citrix Xenserver and FreeBSD migration/suspend scripts

[Mark Felder]

So about a month ago someone made some scripts public that seem to pass  
XenServer the data it needs to believe you're running fully supported Xen  
Tools on FreeBSD. I'm surprised this didn't make headlines. Perhaps it was  
just posted to the wrong audience. Anyway, with these scripts in place you  
can then do suspend and migrate which is something I've personally been  
dying to have access to. Without migration we've been stuck with VMWare so  
this gives us a glimmer of hope as far as a reasonable alternative goes.

Original post here:

http://lists.xen.org/archives/html/xen-api/2012-06/msg00137.html

"I can suspend, move, use ballooning, display ip, disk bandwitdth and  
so... from XenCenter. "

The wiki here:

http://wiki.xen.org/wiki/FreeBSD_9.0_64-bit_HVM_on_XCP_1.1

seems to indicate that the original author intended for this to be using  
an OpenBSD license. I can't actually see that listed anywhere publicly,  
and I wasn't on that list and haven't found his real email address yet to  
thank him for these scripts.....

I took this, put it on github, and spent a little bit of time tonight  
trying to make sense of it and clean it up a bit. It could definitely use  
an overhaul in a few places and have some more cruft cleaned up, but it's  
better than nothing. I've successfully removed any dependency on BASH as  
well as made the rc script a proper rc script. Finally, we're at a point  
where you need no strange cache files (in /procfalse? what was that  
about?) or an /etc/freebsd-version file. It's fairly standalone now.

I've been testing this on a 9.0-RELEASE with a XEN-HVM kernel. I've tested  
suspend, but haven't had a chance to do a migrate yet. Memory usage is  
reporting correctly. I can't seem to see anything functionally wrong with  
this, but I'm sure it could use some love. Ideally I'd like to see this at  
a point where it's clean enough that we can add it into the  
sysutils/xen-tools port so everyone running Citrix XenServer has easy  
access to this capability.

So here you go:

https://github.com/felderado/freebsd-xen-tools-scripts


Please -- consume, fork, tinker, etc. I don't have any particularly  
outstanding scripting skills and have no reason to "own" this project.  
Perhaps we'll end up with a much cleaner and final version floating out  
there soon enough.