Open Stack

Hello,

We want to implement a  production HA OpenStack environment based on
Grizzly release .
We went over the "Introduction to OpenStack High Availability" guide
(http://docs.openstack.org/trunk/openstack-ha/content/ch-intro.html) and we
have few questions:
1. Does Pacemaker is the preferred tool to base OpenStack HA solution on ?
2. Are there any alternatives for Pacemaker ?
3. Will Pacemaker be used as official HA solution in Havana as well ?
4. Is the guide mentioned above can be used in continue to the basic
Grizzly installation guide or any additional steps should be performed
before ?
5. Does the guide assume 2 controller nodes, meaning Pacemaker cluster will
be installed on  2 controller nodes to support HA ?
6. Is there a possibility to configure HA for the Network Node ? If yes ,
can you point us to any relevant references.

Thank you.

Alexandra Kisin
Servers & Network group, IBM R&D Labs in Israel
Unix & Virtualization Team