OpenNebula

I use opennebula in an xen environment where a shared storage solution is not available, as such keeping the xen instance image small is very desirable for transferring to a lot of different machines. It is also desirable to expand (ie dd, resizefs) on the physical host before the instance is brought up simliar to mkimage.sh but on the transfered image. I thought about this a while it seemed reasonable to added an option to the DISK machine template. Below is the option I choose to use:

DISK = [
source = "/data/abimg",
target = "xvda",
bus = "xen",
extend = 5240,
readonly = "no" ]

Where extend is the how many megabytes you wish to expand the image on the destination / physical node. To accomplish this I modified the one/tm/TransferManager.cc to accept this new paramater (see TransferManager-fstutz-0.0.1.patch), and two new bash commands src/tm_mad/ssh/tm_mkextend.sh (attached) and contrib/fit (attached). I realize the scheduler was not modfiied to do a complete disk check for the addition, but at least its usable right now.

I realize everyone might not want this feature and in its current form is not complete, but I wanted to through it out there.