Andrija, Here is the original design document, and it should give you a better idea of what is implemented today:
https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=34838207 We have plans to test this in our lab soon, but just haven't got around to it yet. - Si ________________________________________ From: Andrija Panic <andrija.pa...@gmail.com> Sent: Thursday, June 4, 2015 9:08 AM To: dev@cloudstack.apache.org; us...@cloudstack.apache.org Subject: Re: database high availability question vs haproxy Anyone :) ? On 31 May 2015 at 00:26, Andrija Panic <andrija.pa...@gmail.com> wrote: > Hi, > > I would have a question on database HA feature in db.properties ( > http://cloudstack-administration.readthedocs.org/en/latest/reliability.html#configuring-database-high-availability > ) > > If I understand correctly, it is up to the admin to provide appropriate > mysql HA (active-active, galera, etc) and ACS management server will JUST > try to connect to slaves if the master is down ? > > We are running Galera, with haproxy/keepalived, and by using stoping > haproxy, it takes i.e. 6sec for keepalived to detect haproxy is down, and > failover IP to another host. > > During these 6 seconds, ACS managemnt server goes dead, because of this DB > unavailability. > > So my wondering, is better to use ACS db HA feature, instead of > loadbalancer for this specific purpose ? > (we are also using haproxy/keepalived for management server loadbalancing > - 2 servers in backend...) > > Any experience shared is really appreciated ! > -- > > Andrija Panić > -- Andrija Panić
