[one-users] Info on Partition and volatile disks

[Evan Fraser]

Hi Cyrille,

Try taking a look at UnionFS: http://unionfs.filesystems.org/

It can be mounted overtop of the root filesystem giving you access to the files in the filesystem beneath, while changes are recorded in the unionfs filesystem.

An example using a compressed squashfs image as the root filesystem and then mounting unionfs over top can be found here: http://www.tldp.org/HOWTO/html_single/SquashFS-HOWTO/#sqwrite

Cheers, Evan.

From: users-bounces at lists.opennebula.org [mailto:users-bounces at lists.opennebula.org] On Behalf Of Duverne, Cyrille
Sent: Tuesday, 4 December 2012 11:12 a.m.
To: Mailing List OPENNEBULA
Subject: [one-users] Info on Partition and volatile disks

Dear mailing list,

I always have some topics to make your brain run as fast as light :) :

- I have a base image of 3Gb of Ubuntu Server
- Depending on the request I add a volatile disk of 15 / 50 / 150 Gb (this to avoid copying 150G each time I deploy a VM)

But since the root partition is 3G large, some users are making it exploding without using the 15G free.

I'd like to use the free storage as hosting partition for /var, /usr, /home.
How could I achieve this since the disk volatile and provisioned on the fly at the deployment.

I'm trying to mv /var etc... in init.sh at startup, but it make the VM to never start (maybe because /var/lock, /var/run aren't accessible)

I think symlinks are the best way to do this, I might be wrong.

Please help :)
Regards
CyD
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