I have a 2-node MySQL master/slave to master/slave setup and am looking to
add a MySQL "health" check that can take a node out of the cluster if its
slave is unhealthy, e.g. out of sync. The master/slave master/slave config
is working fine, hence writes in either node are replicated to the other
node. To add Pacemaker into the mix, I configure ha.cf appropriately,
shutdown MySQL and configure Pacemaker resources as follows:
primitive p_mysql ocf:heartbeat:mysql \
params binary="/usr/sbin/mysqld" config="/etc/mysql/my.cnf"
replication_user="slaveuser" replication_passwd="slavepw" test_passwd="root"
pid="/var/run/mysqld/mysqld.pid" socket="/var/run/mysqld/mysqld.sock" \
params additional_parameters="--skip-slave-start" \
op start interval="0" timeout="120" \
op stop interval="0" timeout="120" \
op promote interval="0" timeout="120" \
op demote interval="0" timeout="120" \
op monitor interval="30" timeout="30" OCF_CHECK_LEVEL="1"
ms ms_mysql p_mysql \
meta notify="true" master-max="2" clone-max="2" target-role="Started"
property $id="cib-bootstrap-options" \
dc-version="1.0.8-042548a451fce8400660f6031f4da6f0223dd5dd" \
cluster-infrastructure="Heartbeat" \
stonith-enabled="false" \
no-quorum-policy="ignore" \
last-lrm-refresh="1319301867"
When I start ms_sql, I'm getting the following:
Failed actions:
p_mysql:0_start_0 (node=vsaas-test-sql-1, call=73, rc=1,
status=complete): unknown error
p_mysql:1_start_0 (node=vsaas-test-sql-2, call=63, rc=1,
status=complete): unknown error
Not much in ha-debug that looked relevant...
In using ocf_heartbeat_mysql, I'm not completely sure where MySQL leaves off
and Pacemaker picks up. Should I remove all master/slave config from my
nodes and Pacemaker will auot-config or does Pacemaker expect a
pre-configured system (master/salve) and simply controls starting, stopping,
monitoring, etc...
Is the above config seem adequate to handle a master/slave <-> master/slave
config? Does anyone have an example MySQL/Pacemaker to setup this type of
configuration?
Any help is greatly appreciated.
Thanks,
~Mike M.
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