Hi Ivan, Load balancer is a generic term, it doesn't have to distribute load evenly. In the case of a Galera cluster, it would have a primary galera node to send traffic to, the other nodes would be fail over options.
Every production environment should have a failover option for the MySQL database in case of a physical hardware failure. Also, OSes can become corrupted, and shared storage can become unavailable. Kind regards, Paul Angus [email protected] www.shapeblue.com 53 Chandos Place, Covent Garden, London WC2N 4HSUK @shapeblue -----Original Message----- From: Rafael Weingärtner [mailto:[email protected]] Sent: 18 July 2017 18:17 To: [email protected] Subject: Re: ACS 4.9.2 Management Server and Galera Cluster in CentOS 7 By failover as requirement, do you mean master-master replication and transparent DB access for ACS? On Tue, Jul 18, 2017 at 1:14 PM, Ivan Kudryavtsev <[email protected]> wrote: > Hi, Paul. Thanks for advice. It seems that load balance is not an > option and the failover is the only case. > By the way does anyone tried, thought about implementing the case with > Zookeeper functionality? > > As I said, I personally haven't met the situation when load balancing > required or even failover required, but it might be for intensive > API-centric deployments it's an option? > > 2017-07-18 22:32 GMT+07:00 Paul Angus <[email protected]>: > > > Be careful with your load-balancing Ivan - Since CloudStack relies > > on MySQL’s GET_LOCK and RELEASE LOCK, multi-master isn't supported. > > > > http://www.shapeblue.com/how-to-deploy-high-availability- > > cloudstack-with-mariadb-galera-cluster/ > > > > > > > > Kind regards, > > > > Paul Angus > > > > [email protected] > > www.shapeblue.com > > 53 Chandos Place, Covent Garden, London WC2N 4HSUK @shapeblue > > > > > > > > > > -----Original Message----- > > From: Ivan Kudryavtsev [mailto:[email protected]] > > Sent: 18 July 2017 16:08 > > To: [email protected] > > Subject: ACS 4.9.2 Management Server and Galera Cluster in CentOS 7 > > > > Hello, community. > > > > A person asked me whether i have experience of deploying ACS 4.9 with > > Galera HA cluster and after I answered - "I don't" I decided to try > because > > I was unable to find relevant new article I wrote it as well. It explains > > how to deploy ACS 4.9.2 to Galera in CentOS 7. I published it under > Apache > > License, so If someone includes it in docs it would be great, please also > > don't hesitate notifying me with any bugs found and considerations. Hope > > it'll help to someone. > > > > Link: > > https://bitworks.software/blog/en/2017-07-18-mariadb- > > galera-cloudstack-ha-cluster.html > > > > Have a good day. > > > > -- > > With best regards, Ivan Kudryavtsev > > Bitworks Software, Ltd. > > Cell: +7-923-414-1515 > > WWW: http://bitworks.software/ <http://bw-sw.com/> > > > > > > -- > With best regards, Ivan Kudryavtsev > Bitworks Software, Ltd. > Cell: +7-923-414-1515 > WWW: http://bitworks.software/ <http://bw-sw.com/> > -- Rafael Weingärtner
