On 10/11/2014 11:34, Sebastien Han wrote: > 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? Hi Sebastien, I can't elaborate because I know nothing about HAProxy (well, close to nothing ;-). I'd like to learn more about how HA (via HAProxy or something else) can leverage Ceph in a meaningfull way thouhg, hence my interest for the topic. Cheers > >> 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 > -- Loïc Dachary, Artisan Logiciel Libre
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