I’m looking out for the best solution to resolve this problem : having some of my qube VMs, or at least their data, on an external USB hard drive.
I already managed to follow the Secondary storage documentation page on another machine with an internal HDD. But, as far as I understand, it’s not possible with an external HDD without security risks, because this drive should be attached to dom0.
My current solution is to create a normal AppVM in dom0, attach the corresponding logical volume to the AppVM and link some directories to it. My external HDD is encrypted and contains a LVM thin pool with logical volumes. I’m able to decrypt it in an AppVM dedicated to this task called
disks-manager. So, I can attach the drive to my test-automount AppVM on
qvm-start test-automount --hddisk=disks-manager:dm-1
This is my
/rw/config/rc.local inside test-automount:
if [ ! -b /dev/xvdi ]; then shutdown now fi mkdir -p /mnt/vm-external-data mount /dev/xvdi /mnt/vm-external-data if [ ! -h /home/user/Music ]; then rmdir /home/user/Music ln -s /mnt/vm-external-data/home/user/Music /home/user fi
It’s okay but think I can look for some better solution because I can have a lot of different directories to link … I’m not sure if doing this is safe:
rm -r /home/user ln -s /mnt/vm-external-data/home/user /home/user
Of course, I tried to play with
/etc/fstab. This is the content of my
/dev/mapper/dmroot / ext4 defaults,discard,noatime 1 1 /dev/xvdb /rw auto noauto,defaults,discard,nosuid,nodev 1 2 /dev/xvdi /mnt/vm-external-data auto defaults,discard,nosuid,nodev 0 2 /mnt/vm-external-data/home /home none noauto,bind,defaults,nosuid,nodev 0 0 /rw/usrlocal /usr/local none noauto,bind,defaults 0 0 # ... [default AppVM lines here] ... /dev/xvdj /mnt/removable auto noauto,user,rw 0 0
I only edited the 3rd, 4th and last line, but without success.
findmnt doesn’t output errors or warnings and
mount -a ignore everything I added in
There is a lot of topics about this on this forum but I can’t find a good solution. Is there something I’m missing ? Any ideas to improve my
fstab to work or anything else ?