[Pacemaker] Help for Master/Slave Mysql with Pacemaker

[Andrew Beekhof]

On Mon, Mar 9, 2009 at 14:37,  <rvm at free.fr> wrote:
> Hello,
>
> I'm trying to setup a master/slave mysql with a VIP on my master and a VIP on my slave.
> The idea is to use a VIP for R/W connections on the master node and a VIP for R/O connections in the slave node. The R/W VIP always run with the Master role and the R/O can run on the Master node only if the Slave failed (so the R/O VIP prefer to run on a the Slave node).
> Actually, with my configuration, my R/W VIP is always on my Master but I can't say to my R/O VIP to prefer run on the Slave node !
> My conf (no rules for my R/O VIP) :
> primitive MAIL-RO ocf:heartbeat:MailTo \
>        params email="MY MAIL" subject="HA"
> primitive VIP-SQL-RO ocf:heartbeat:IPaddr2 \
>        params ip="x" broadcast="x" nic="eth0" cidr_netmask="24" \
>        op monitor interval="11s" timeout="2s"
> primitive MAIL-RW ocf:heartbeat:MailTo \
>        params email="MY MAIL" subject="HA"
> primitive VIP-SQL-RW ocf:heartbeat:IPaddr2 \
>        params ip="x" broadcast="x" nic="eth0" cidr_netmask="24" \
>        op monitor interval="10s" timeout="2s"
> primitive MYSQL ocf:my_ocf:mysql \
>        op monitor interval="10s" role="Master" timeout="2s" \
>        op monitor interval="11s" role="Slave" timeout="2s"
> group RESOURCES-SQL-RO MAIL-RO VIP-SQL-RO
> group RESOURCES-SQL-RW MAIL-RW VIP-SQL-RW
> ms MasterSlave_MYSQL MYSQL \
>        meta clone-max="2" notify="false" globally-unique="false" target-role="Started"
> colocation RW-on-MASTER inf: RESOURCES-SQL-RW MasterSlave_MYSQL:Master


colocation RO-on-MASTER 10000: RESOURCES-SQL-RO MasterSlave_MYSQL:Slave

10000 == a lot but not "infinity", this means it prefers to live with
the slave, but can live with the master if the slave is not available

> order MYSQL_RW-before-GROUP inf: MasterSlave_MYSQL:promote RESOURCES-SQL-RW:start
> order MYSQL_RO-before-GROUP inf: MasterSlave_MYSQL:demote RESOURCES-SQL-RO:start
> property $id="cib-bootstrap-options" \
>        dc-version="1.0.2-c02b459053bfa44d509a2a0e0247b291d93662b7" \
>        stonith-enabled="false" \
>        no-quorum-policy="ignore"
>
> Any ideas ?
> Thanks a lot !
>
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