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xen-users
Re: [Xen-users] Partition DomU Filesystem
Michael Morris wrote:
Hi,
I'm trying to create multiple partitions within my DomU so that user
data can't fill up my space for logs. I haven't found anything I could
use on Google, which made me think I needed to partition my DomU in a
"standard" way. I tried this without any success. I don't really know
much about partitioning except for what I do the first time I boot up my
machine and configure it. I would really appreciate any suggestions for
how to partition my DomU.
I've noticed that the documentation over at XenSource doesn't cover this
very clearly. (They show the example for exporting a single partition
to the DomU, but not how to do multiple partitions.)
What I do is create LVM logical volumes (lvcreate) in my primary volume
group on the machine (LVM management happens in Dom0). Then I give
those to the DomU as /dev/sda1, /dev/sda2, /dev/sda3 which can be mapped
inside the DomU's fstab to the proper folders.
The sordid details:
(2) 160GB drives in software RAID1 (mdadm managed inside the Dom0
domain), the 5th partition is ~132GB and is a large LVM area that I chop
into smaller bits using lvcreate for individual DomUs. My LVM volume
group is called "vgmirror", with logical volumes called "fw1root" and
"fw1logs". Which gives me:
/dev/vgmirror/fw1root (4GB)
/dev/vgmirror/fw1logs (4GB)
Looking at my /etc/xen/domu-fw1 file:
disk = [ 'phy:vgmirror/fw1root,sda1,w', 'phy:vgmirror/fw1logs,sda2,w' ]
Which exports it to the DomU as sda1 and sda2.
Hopefully that helps. The DomU thinks that it's running on a non-RAID
SATA drive with 2 partitions.
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