Ganeti 2.7 design

The following design documents have been implemented in Ganeti 2.7:

• Ganeti Bulk Create
• Design for parallelized instance creations and opportunistic locking
• Design for executing commands via RPC
• Design for adding a node to a cluster
• Design for virtual clusters support
• Network management
• Linux HA integration
• Ganeti shared storage support (Updated to reflect the new ExtStorage Interface)

The following designs have been partially implemented in Ganeti 2.7:

• Splitting the query and job execution paths: only queries not needing RPC are supported, through confd
• Partitioned Ganeti: only exclusive use of disks is implemented
• Ganeti monitoring agent: an example standalone DRBD data collector is included