On Mon, Oct 31, 2011 at 02:45:23PM +0000, Matthew Booth wrote: > We've recently discovered that libguestfs can't handle guests which > use md. There are (at least) 2 reasons for this: Firstly, the > appliance doesn't include mdadm. Without this, md devices aren't > detected during the boot process. Simply adding mdadm to the > appliance package list fixes this.
I've added the mdadm package since it sounds useful to have: http://git.annexia.org/?p=libguestfs.git;a=commitdiff;h=6f84ef6768e9c625d67f7eb015277b0ec1b2c2af > Secondly, md devices referenced in fstab as, e.g. /dev/md0, aren't > handled correctly by inspection. This looks a bit more complicated. > In my test guest, the guestfs appliance automatically creates the 2 > md devices as: > > * /dev/md/localhost:localdomain:0 > * /dev/md/localhost:localdomain:1 That's a very strange name. udev going crazy? > These are symlinks to ../md126 and ../md127 respectively. I haven't > yet worked out why they aren't created as md0 and md1 as in the > guest. I think here we need to either work out how to make the > appliance detect and use their names (if this is even possible), or > to map the names appropriately using information from > /dev/md/md-device-map in the appliance's root, and /etc/mdadm.conf > in the guest's root. > > I don't currently think we'll need any new apis for this. I'm not > convinced we need apis for creating and managing md devices, for > example. We could do with a test for inspection of a guest which > uses md devices, which would obviously require creating that guest. > However, we can frig that for the test using debug sh "mdadm ...". New APIs are cheap ... Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones virt-df lists disk usage of guests without needing to install any software inside the virtual machine. Supports Linux and Windows. http://et.redhat.com/~rjones/virt-df/ _______________________________________________ Libguestfs mailing list [email protected] https://www.redhat.com/mailman/listinfo/libguestfs
