Open Stack

Logan,

Thank you for the response!

The high availability configuration documentation will be useful. The immediate 
problem is less with high availability than performance enhancement.

Using the nova-controller and -compute model, I have one cinder node running 
the api, scheduler, and volume services and the others only running the volume 
service. The error in my configuration was that the iscsi_ip_address value was 
set incorrectly; it pointed to the IP address of the "controller" node. 
Changing it to the IP address of the host itself solved the problem.

As a recap, this is what I think it all means:

To run cinder services for a cluster on multiple nodes, pick on to the the 
"controller:"
   openstack-cinder-api
   openstack-cinder-scheduler
   openstack-cinder-volume
   tgtd

On the rest of the cinder nodes, run:
  openstack-cinder-volume
  tgtd

I expect this to change for a high availability configuration. Is there, 
however, anything particularly wrong with the configuration I described?

Thanks,

Craig

On 03/11/2013 06:15 PM, Logan McNaughton wrote:
> You'll want to look here:
> http://docs.openstack.org/trunk/openstack-ha/content/s-cinder-api.html
>
> You'll need to basically create a virtual IP and load balance between the
> nodes running cinder-api and cinder-scheduler. If you want multiple nodes
> running cinder-volume, you can add them regularly, like you would with a
> nova-compute node.
> On Mar 11, 2013 6:51 PM, "Debashis Kundu (dkundu)" <dkundu at cisco.com> wrote:
>
>> O
>>
>> ----- Original Message -----
>> From: Craig E. Ward [mailto:cward at isi.edu]
>> Sent: Monday, March 11, 2013 05:23 PM
>> To: openstack at lists.launchpad.net <openstack at lists.launchpad.net>
>> Subject: [Openstack] Configuring More-than-One Cinder Node
>>
>> I have an installation that wants to deploy two or more cinder nodes
>> within an
>> OpenStack (Folsom) cluster. All of the hits I find on Google for
>> configuring
>> cinder only describe how to configure the software for a single node. Is it
>> even possible to have more than one node running the cinder services in a
>> cluster?
>>
>> The setup I have has one of the cinder nodes identified as "the" cinder
>> node to
>> the compute and other node types. A second node was installed and the
>> cinder
>> services started.
>>
>> On the nova controller node, however, while a new volume could be created
>> that
>> was listed in the MySQL database as on the second node, all attempts to
>> attach
>> that volume to an instance "silently" failed. The "nova volume-attach"
>> command
>> would come back with an id and mapping of instance to volume, but the very
>> next
>> "nova volume-list" command continued to show the volume in question as
>> "available."
>>
>> If the second cinder node had the cinder-volume service running, volumes on
>> that node could be deleted. If cinder-volume was not running, the "delete"
>> would go on forever.
>>
>> Everything works as expected with only the cinder node configured in
>> nova.conf
>> running, i.e. as a single cinder node installation. Volumes can be created,
>> attached, used, detached, and deleted.
>>
>> Are there some extra parameters that should be set in either nova.conf or
>> cinder.conf to indicate that the cinder services are available on
>> more-than-one
>> node? Or is what we're trying to do something unexpected and not supported?
>>
>> Thanks,
>>
>> Craig
>>
>> --
>> Craig E. Ward
>> USC Information Sciences Institute
>> cward at ISI.EDU
>>
>>
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>

-- 
Craig E. Ward
USC Information Sciences Institute
310-448-8271
cward at ISI.EDU