Jeff Utter wrote:
So, I've been trying this out. But i ran into the problem where if the
/lib/modules was mounted in the dom0 xen wouldn't let me start a domU
with it as one of the disk entries. Is there any way around this, am i
overlooking something? for now i made a lvm snapshot of the /lib/module
partition so i could get my domU's back up and running.
Hi Jeff,
Here's how I did it for r/o /usr.
# disk volumes/partitions
/dev/vg0/fc4 contains / # for domain-0
/dev/vg0/swap contains swap # for domain-0
/dev/vg0/vm1 contains / # for domU #1
/dev/vg0/sw1 contains swap # for domU #1
/dev/vg0/usr contains /usr/* # for everybody
# from the xen domU #1 definition file /etc/xen/vm1
disk = [
'phy:vg0/vm1,hda1,w',
'phy:vg0/usr,hda2,r',
'phy:vg0/sw1,hda3,w'
]
# domain-0 /etc/fstab
/dev/vg0/fc4 / ext3 defaults 1 1
/dev/vg0/usr /usr ext3 ro,async,exec,suid,dev,nouser,auto 0 0
/dev/vg0/swap swap swap defaults 0 0
# domU #1 /etc/fstab
/dev/hda1 / ext3 defaults 1 1
/dev/hda2 /usr ext3 ro,async,exec,suid,dev,nouser,auto 0 0
/dev/hda3 swap swap defaults 0 0
There are alot of little pieces happening at different times on
different levels so it can become very confusing. Hope this makes it a
little clearer for you.
Thanks,
Jeff
I use a shared /usr partition between my dom0 and all the domU's. You
may be able to do something like that.
Create a logical volume to contain /lib/modules/2.6.xx-xen. Export it
in your domU definitions as one of the "disk = []" entries, read only,
then add a mount line in each of your domU's for it. Guaranteed to be
the same on each domU.
BTW, none of my domU's even has a /boot partition.
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