Allow to grow the AppVM's private storage?

[joanna]

Research options for automatically or semi-automatically handling a situation when a given AppVM needs more storage (private.img) than originally assigned.

Currently if a user wants to extend private storage for an AppVM, the user must do something like this:

cd /var/lib/qubes/appvms/XXX/
mkdir mnt mnt.new
mount -o loop,ro private.img mnt
truncate -s <new_max_size> private-new.img
mkfs.ext4 private-new.img
mount -o loop private-new.img mnt.new
cp -pr mnt/* mnt.new/
umount mnt mnt.new
rm -f private.img mnt mnt.new
mv private-new.img private.img

... which is a bit, well, not user-friendly ;)

[marmarek]

There is easier way:
Dom0 (AppVM _can_ be running):

cd /var/lib/qubes/appvms/XXX/
truncate -s <new_max_size> private.img

if AppVM is running (still in Dom0):

losetup -a # find loop device connected with private.img
losetup -c /dev/loopX

in AppVM:

resize2fs /dev/xvdb

Tested :)

This can be easly automated with simple qvm-* tool and/or qubes-manager.

[marmarek]

Wait for resize device in AppVM before resize2fs.

[marmarek]

​http://git.qubes-os.org/gitweb/?p=marmarek/core.git;a=commit;h=01ef2aff9ed26389e88f9c1a86a74c7c38bfd5ee