OpenStack Compute (nova)

vCenter compute driver enhancements to support HP Cinder 3Par driver

Registered by Kiran Kumar Vaddi on 2013-03-21

Title: vCenter compute driver enhancements to support HP Cinder 3Par driver
Blueprint/Facilitated Discussion Overview
Volumes created on FC arrays are supported only for KVM today. This blueprint proposal is to
1. Enhance the vCenter driver to support FC volume attach to instances created on ESX
2. Support HP Cinder 3Par driver
3. Provide HBA information of all ESX hosts in the vCenter cluster(s) so that cinder driver can present the LUN to the right ESX host(s)
4. Provide iSCSI initiator information for all hosts in the cluster
Intending to implement for vCenter compute driver only
Note: The blueprint for FC support for KVM(libvirt) has already been approved and code has been merged into Grizzly 3. https://wiki.openstack.org/wiki/Cinder/FibreChannelSupport

Blueprint information

Status:: Started

Approver:: Russell Bryant

Priority:: Undefined

Drafter:: Kiran Kumar Vaddi

Direction:: Needs approval

Assignee:: Kiran Kumar Vaddi

Definition:: Review

Series goal:: None

Implementation:: Needs Code Review

Milestone target:: None

Started by: Kiran Kumar Vaddi on 2013-03-22

Related branches

Related bugs

Sprints

ahmed

Whiteboard

Hi, during the discussions at the Havana summit, it was proposed to avoid interface changes between nova and cinder and move the request of presenting the LUN for each host in the cluster into nova.
So in the modified approach, the sequence for a volume-attach would be as follows
1. nova-api calls attach volume method of Nova manager
2. Nova manager calls get_volume_connector method of vCenter nova driver
The nova driver returns the connector information. It additionally returns the list of all hosts in the cluster in a new key called clustered_hosts
3. Nova manager calls initialize_connection method of volume_api "for each host in the cluster". This looping is new. It builds the connection_info object with information of all the hosts.
4. Nova manager now calls attach_volume of the vCenter nova driver with the connection_info. The driver now attaches the volume to the instance. The driver attaches the volume from the host on which the instance resides.
We can discuss further in the IRC.
-kirankv

Gerrit topic: https://review.openstack.org/#q,topic:bp/fc-support-for-vcenter-driver,n,z

Addressed by: https://review.openstack.org/35633
Enhance the vCenter driver to support FC volume attach

Unapproved - please re-submit via nova-spec --johnthetubagy (20th March 2014)

Removed from next, as next is now reserved for near misses from the last milestone --johnthetubaguy

(?)