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xen-users
Re: [Xen-users] Resizing DomUs
Harold A. Giménez Ch. wrote:
Thanks Rainer, that makes sense.
How would I go about resizing the LVM? The PV you mention is simply
the /boot partition, and the LVM in there is where / is mounted. The
objective would be to expand the LVM. How would I go about that?
There are several ways to do this but they all amount to the same in the
end. If you use fdisk on the file you can delete the second partition
and add it with the same start point and the default end point so that
the partition now fills the disk.
Generally speaking it's now easiest to do the remainder of the resizing
in the guest. First, run "pvresize /dev/xvda2" (or whatever device the
disk is mapped to). This should grow the volume group to which this
belongs and you can now do "vgdisplay /dev/VolGroup00" (or whatever the
volume group is called) and you'll see you have some free physical
extents. Now you can increase the size of the logical volume you want
to grow with "lvextend -L +<n> /dev/VolGroup00/LogVol01" where "<n>" is
the number of extents you want to grow it by and which is no more than
the number of free extents reported by vgdisplay. And now, finally,
you can grow the file system: "resize2fs /dev/VolGroup00/LogVol01".
That's all assuming you have a Red Hat/Fedora style DomU and it's
reasonably new. If it's different or it's older some things will be
different: the main thing is that resize2fs used to be ext2online and
took the mount point as parameter.
There are manual pages for all the commands I mentioned and it's worth
reading them. And backing stuff up, just in case.
jch
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