[Rdo-list] RFC: Document regarding HA OpenStack deployments using application-native tools and keepalived

Dear all, Following last week release of the document defining highly available architecture for OpenStack using Pacemaker, I would like to present a new document, which also defines a highly available architecture for OpenStack, using keepalived and application-native tools. * Why two documents? The main goal of this document is to define a highly available architecture using application-native tools whenever possible. Some environments tend to prefer that over using Pacemaker to control all services, so it was considered a good idea to document such configuration and request feedback on it. * Main goals: - Document availability options for each component - Document limitations and caveats of this approach - Provide step-by-step instructions on how this architecture can be implemented The instructions should apply to both CentOS and RHEL platforms, and differences between OpenStack distributions are documented when required. You can find the document at: https://github.com/beekhof/osp-ha-deploy/blob/master/HA-keepalived.md Please be aware that this document will also be evolving over time, and feedback is more than welcome. Thanks, Javier