Does OpenNebula automatically provision multiple datastore for VM storage?

Community Support
1

I have an OpenNebula server with the following FS Datastore configuration:

  • Files: 200GB (Host Storage)
  • Storage1: 11TB (iSCSI SAN Mounted to Host)
  • Storage2: 11TB (iSCSI SAN Mounted to Host)

Currently, OpenNebula is defaulting to “Files” datastore. When creating a Template’s storage, there is no option to target the disk’s datastore.

I’m seeking clarification if OpenNebula, will automatically provision VirtualMachine storage to “Storage1 and Storage2” once “Files” storage capacity is exceeded?

2

Hi,

I’m not sure I understand your configuration. Are those Image or System datastores? Which drivers are they using?

In general terms, the storage works like this:
When the VM is deployed it needs storage for the images, and the system files and volatile disks.

  • Images are created in a Datastore. When deployed, the images will (for most configurations) use that datastore storage. So if it runs out new VMs will not be deployed, other DS storage cannot be used.
  • For the system files and volatile disks, the OpenNebula scheduler selects a System Datastore. If a system DS runs out of space, the scheduler will start to deploy new VMs in the other available system datastores.

More info here: http://docs.opennebula.org/4.14/administration/storage/sm.html