Use the Overlay Local Filesystem

This topic describes how to configure the local filesystem as the block storage backend provider for the Storage Controller (SC).


In this configuration the SC itself hosts the volume and snapshots for EBS and stores them as files on the local filesystem. It uses standard Linux iSCSI tools to serve the volumes to instances running on NCs.

To configure overlay block storage for the zone, run the following commands on the CLC
  1. Configure the SC to use the local filesystem for EBS.
    The output of the command should be similar to:
  2. Verify that the property value is now: 'overlay'
  3. Verify that the SC is listed; note that it may be in the broken state:
    euserv-describe-services --filter service-type=storage

Your local filesystem (overlay) backend is now ready to use with Eucalyptus.