[CLOUDSTACK-4810] Enable hypervisor snapshots for CloudStack-managed storage (for XenServer and VMware)

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.2.0
• Fix Version/s: 4.3.0
• Security Level: Public (Anyone can view this level - this is the default.)
• Environment: Ubuntu 12.04
• Assignee: Mike Tutkowski
• Reporter: Mike Tutkowski
• Created: 04/Oct/13 05:47
• Updated: 10/Jan/14 06:37
• Resolved: 09/Jan/14 04:12

Description

CloudStack-managed storage was introduced into CloudStack with the new storage framework in 4.2.

This allows CloudStack to create and delete storage repositories and datastores as needed.

For 4.2 the VDI inside of an SR takes up almost as much space as is available in the SR (so there is a one-to-one mapping between an SR and a VDI). This is the same idea for datastores and VMDKs.

The SR or datastore should be sized larger than its VDI or VMDK so there is space available for hypervisor snapshots that get stored on the same SR or datastore.

How much larger can be determined by a cluster-level setting.

For example, if you want a 10 GB CloudStack volume, the storage plug-in in question can create, say, a 20 GB volume on its SAN. 10 GB to be used for the CloudStack volume and an additional 10 GB for hypervisor snapshots.