On 06/30/2012 06:32 AM, Christian Parpart wrote: > On Sat, Jun 30, 2012 at 1:51 PM, Narayan Desai <narayan.de...@gmail.com > <mailto:narayan.de...@gmail.com>> wrote: > > On Sat, Jun 30, 2012 at 3:06 AM, Christian Parpart <tra...@gmail.com > <mailto:tra...@gmail.com>> wrote: > > Hm, Pacemaker/Corosync *inside* the VM will add the Service-IP to > the local > > ethernet > > interface, and thus, the outside OpenStack components do not know > about. > > > > Using a dedicated floating IP pool for service IPs might feel like > a great > > solution, but > > OpenStack is not the one to manage who gets what IP - but > Corosync/Pacemaker > > inside > > the KVM instances. :-) > > > > Anyone an idea how to solve this? > > It sounds like you want to add explicit support to pacemaker to deal > with openstack fixed addresses. Then you could run with rfc1918 > floating addresses, and then have pacemaker/corosync reassign the > (external) fixed address when consensus changes. > > Think of the openstack fixed address control plane in a similar way to > ifconfig. You should even be able to script it up yourself; you'd need > to add your openstack creds to the HA images though. > > > Hey, > > that's a really great idea, and IMHO apparently the only way to not > interfere with OpenStack internals too much. > > So I need to create a new resource agent that represents a floating IP. > If I succeed, I'll share that script then. :) > > Cheers, > Christian Parpart. > >
Another option is to give Heat's High Availability a spin. Heat is made specifically for OpenStack cloud environments (vs corosync/pacemaker being specifically made for bare metal Linux environments). See http://www.heat-api.org Heat originates from the same authors as Corosync and much of the cluster stack internals on Linux - so the high availability developer experience that went into creating the software is equivalent. For more details on Heat's HA see: https://github.com/heat-api/heat/wiki/Using-HA An example VM image template that describes HA: https://github.com/heat-api/heat/blob/master/templates/WordPress_Single_Instance_With_HA.template > _______________________________________________ > Mailing list: https://launchpad.net/~openstack > Post to : openstack@lists.launchpad.net > Unsubscribe : https://launchpad.net/~openstack > More help : https://help.launchpad.net/ListHelp > _______________________________________________ Mailing list: https://launchpad.net/~openstack Post to : openstack@lists.launchpad.net Unsubscribe : https://launchpad.net/~openstack More help : https://help.launchpad.net/ListHelp