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From Paul Angus <paul.an...@shapeblue.com>
Subject RE: ACS 4.9.2 Management Server and Galera Cluster in CentOS 7
Date Tue, 18 Jul 2017 18:14:59 GMT
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

paul.angus@shapeblue.com 
www.shapeblue.com
53 Chandos Place, Covent Garden, London  WC2N 4HSUK
@shapeblue
  
 


-----Original Message-----
From: Rafael Weingärtner [mailto:rafaelweingartner@gmail.com] 
Sent: 18 July 2017 18:17
To: users@cloudstack.apache.org
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 <kudryavtsev_ia@bw-sw.com>
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 <paul.angus@shapeblue.com>:
>
> > 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
> >
> > paul.angus@shapeblue.com
> > www.shapeblue.com
> > 53 Chandos Place, Covent Garden, London  WC2N 4HSUK @shapeblue
> >
> >
> >
> >
> > -----Original Message-----
> > From: Ivan Kudryavtsev [mailto:kudryavtsev_ia@bw-sw.com]
> > Sent: 18 July 2017 16:08
> > To: users@cloudstack.apache.org
> > 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
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