Abstract

It is currently not possible to attach additional virtual disks directly via the default webinterface.

What you do in principle:

Step by step

Expand the VM entry for the VM you want to add an additional disk to and note the UUID below VM name (VMUUID)
Use uuidgen and generate a new UUID (DISKUUID)
Calculate the size of the new disk in bytes: N * 1073741824 for N gigabyte (DISKSIZE)
Open the URL http://YOURSTONEYCLOUD/phpldapadmin/ and login using dc=Manager,...
Navigate to: sstDisk=vda,ou=devices,sstVirtualMachine=VMUUID,ou=virtual machines,ou=virtualization,ou=services,dc=foss-cloud,dc=org using the tree structure on the left
Click on Copy or move this entry and choose sstDisk=vdb,ou=devices,sstVirtualMachine=VMUUID,ou=virtual machines,ou=virtualization,ou=services,dc=foss-cloud,dc=org as Destination DN
Replace:
- the UUID in sstVolumeName
- and the same UUID in sstSourceFile with DISKUUID (warning: in sstSourceFile are at least two UUIDs, replace only the one matching sstVolumeName)
- the value in sstVolumeCapacity by DISKSIZE
Click on Create and confirm with Commit
You should get: Creation successful!
Note the first UUID in the attribute sstSourceFile (POOLUUID)

Login to the VM node on which the VM is/was running
Run the following command as root: virsh vol-create-as POOLUUID DISKUUID.qcow2 DISKSIZE --format qcow2 --allocation 0
You should get Vol DISKUUID.qcow2 created
Run: chown root:vm-storage /var/virtualization/vm-*/POOLUUID/DISKUUID.qcow2
Run: chmod g+rw /var/virtualization/vm-*/POOLUUID/DISKUUID.qcow2
Switch to the stoney cloud webinterface again and shutdown the VM (if not already done)
Click first on the edit VM icon and then save (without changing anything)
Start the VM again