Indeed, that’s what we discussed with Giulio, using HAProxy for the Monitors is a bit overkill since the client is natively able to switch between different monitor source. Loic, maybe you can elaborate a bit more on the usage of HAProxy for the monitors? > On 09 Nov 2014, at 22:54, Justin Erenkrantz <justin@xxxxxxxxxxxxxx> wrote: > > On Fri, Nov 7, 2014 at 4:35 AM, Giulio Fidente <gfidente@xxxxxxxxxx> wrote: >> The architecture we're considering is as follows: >> >> keepalived >> haproxy >> ceph-mon >> >> where haproxy and ceph-mon are always up on all openstack 'controller' nodes >> (also running cinder) and keepalived is taking care of managing a virtual ip >> hosted on one of those > > For Ceph, you almost certainly don't need to use keepalived or haproxy > as all Ceph clients will fail over to the full set of monitor IPs (you > need a way of distributing those IPs to the cluster - > chef/puppet/ansible/etc/etc can handle that). Having > keepalived/haproxy in the loop for ceph-mon is one more thing that > could break. > > We do run cinder services behind the controller/headnodes nodes via > keepalived/haproxy - the "trick" such as it is for Ceph is to set all > the hostnames in cinder to being the same and it works okay. See: > > https://github.com/bloomberg/chef-bcpc/blob/master/cookbooks/bcpc/templates/default/cinder.conf.erb > > We haven't seen any issues in an active/active configuration; though > there are some MySQL schema deadlocks that aren't necessarily related > to Ceph sitting in Cinder. > > Cheers. -- justin > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html Cheers. –––– Sébastien Han Cloud Architect "Always give 100%. Unless you're giving blood." Phone: +33 (0)1 49 70 99 72 Mail: sebastien.han@xxxxxxxxxxxx Address : 11 bis, rue Roquépine - 75008 Paris Web : www.enovance.com - Twitter : @enovance -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
