Re: [rdo-list] tripleo ha topology

So if understood correctly HAproxy is basically a component in pcs?

-----Original Message----- From: Raoul Scarazzini [mailto:rasca@redhat.com] Sent: Thursday, December 15, 2016 10:33 AM To: Dotan, Alon <alon.dotan(a)hpe.com>; rdo-list(a)redhat.com Subject: Re: [rdo-list] tripleo ha topology On 14/12/2016 22:59, Dotan, Alon wrote: > Hey, > Some can provide link or explanation about the use of haproxy and > pacemaker together in tripleo? > Why need pcs if there is galera and haproxy? Galera is managed via a specific resource agent which takes care of all the stuff needed to start, stop and, most of all, recover. It automates a lot of tasks which otherwise will be manual. Haproxy is managed by Pacemaker because of the Vips. There are specific constraints that ensures that whether a Vip change the host, haproxy service will follow. Hope this helps, -- Raoul Scarazzini rasca(a)redhat.com