[Pacemaker] Help needed to configure MySQL Cluster using Pacemaker, Corosync, DRBD and PCS

[Andrew Beekhof]

> On 13 Jan 2015, at 7:05 am, Shameer Babu <shameerbabukm at gmail.com> wrote:
> 
> Hi Andrew,
> 
> >>>>>>>>Could you be a bit more specific about "didn't work" ?
> 
> I have installed MariaDB and tried to add the resource mysql (simply created resource) using the simple command "pcs resource create MysQL ocf:heartbeat:mysql" . I know this is incomplete and removed those resource.
> 
> Please see my existing cluster status:
> -------------------------------------------------------------------------------------------
> PCS Status:
> ---------------------------------------------------------------------------------------
> Every 2.0s: pcs status                                   Mon Jan 12 14:56:38 2015
> 
> Cluster name: MyCluster
> Last updated: Mon Jan 12 14:56:38 2015
> Last change: Mon Jan 12 14:56:25 2015 via cibadmin on webserver-01
> Stack: corosync
> Current DC: webserver-02 (2) - partition with quorum
> Version: 1.1.10-32.el7_0.1-368c726
> 2 Nodes configured
> 2 Resources configured
> 
> 
> Online: [ webserver-01 webserver-02 ]
> 
> Full list of resources:
> 
>  ClusterIP      (ocf::heartbeat:IPaddr2):       Started webserver-01
>  
> PCSD Status:
>   webserver-01: Online
>   webserver-02: Online
> 
> Daemon Status:
>   corosync: active/disabled
>   pacemaker: active/disabled
>   pcsd: active/disabled
> ------------------------------------------------------------------------------------------------------------
> DRBD status in webserver-01: (This may be used to setup MySQL)
> ---------------------------------------------
> [root at webserver-01 ~]# cat /proc/drbd
> version: 8.4.5 (api:1/proto:86-101)
> GIT-hash: 1d360bde0e095d495786eaeb2a1ac76888e4db96 build by mockbuild@, 2014-08-17 22:54:26
> 
>  2: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r-----
>     ns:0 nr:12288 dw:12288 dr:728 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0
> ----------------------------------------------------------------------------------------------------------------------
> Databases:
> ----------------------------------
> MariaDB is installed on both nodes
> 
> [root at webserver-01 ~]# mysql -V
> mysql  Ver 15.1 Distrib 5.5.40-MariaDB, for Linux (x86_64) using readline 5.1
> --------------------------------------------------------------------------------------------------------------------
> 
> My aim is to create MySQL/MariaDB cluster using pacemaker DRBD on CentOS7.
> Could you please guide me on this or provide any related articles ?

For starters you need to put drbd under control of the cluster.
The you can colocate mysql with drbd:Master

> 
> Regards,
> Shameer
> 
> 
> On Mon, Jan 12, 2015 at 6:20 AM, Andrew Beekhof <andrew at beekhof.net> wrote:
> 
> > On 11 Jan 2015, at 5:39 pm, Shameer Babu <shameerbabukm at gmail.com> wrote:
> >
> > Hi,
> >
> > I have configured Apache cluster by referring you document http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf and it was good and working. Now I would like to configure a simple MySQL cluster using pacemaker,corosync,DRBD and Pcs in CentOS 7. I was trying add the mysql resource but didn't work.
> 
> Could you be a bit more specific about "didn't work" ?
> 
> > In CentOS 7 the database is MariaDB. I would like to configure the resource mysql/mariadb for two nodes. Can any body help me on this?
> >
> > I have configured the following till now:
> >
> > 1. Installed pcs,mariadb,pacemaker,corosync and DRBD
> > 2. Configured the resource Virtual IP and it is working fine
> > 3. Configured DRBD to sync files in both nodes and /dev/drbd1 is ready to use
> >
> > Please help me to configure the resource maraidb/mysql for my cluster
> >
> > Regards,
> > Shameer
> > _______________________________________________
> > Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> > http://oss.clusterlabs.org/mailman/listinfo/pacemaker
> >
> > Project Home: http://www.clusterlabs.org
> > Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> > Bugs: http://bugs.clusterlabs.org
> 
> 
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> 
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs: http://bugs.clusterlabs.org
> 
> _______________________________________________
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> 
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs: http://bugs.clusterlabs.org