Cluster service containing mysql resource fails to start with mysqld reporting "Can't start server: can't create PID file: Permission denied" in RHEL 6

Issue

• mysql resource in cluster fails to start with a 'Timeout Error':

Nov 15 11:33:56 node1 rgmanager[18149]: [mysql] Starting Service mysql:myDatabase
Nov 15 11:34:11 node1 rgmanager[18342]: [mysql] Starting Service mysql:myDatabase > Failed - Timeout Error
Nov 15 11:34:11 node1 rgmanager[1852]: start on mysql "myDatabase" returned 1 (generic error)

• /var/log/mysqld.log reports permission denied when trying to create the pid file in the cluster directory:

121115 11:33:25 [ERROR] /usr/libexec/mysqld: Can't create/write to file '/var/run/cluster/mysql/mysql:rhelcms.pid' (Errcode: 13)
121115 11:33:25 [ERROR] Can't start server: can't create PID file: Permission denied
121115 11:33:25 mysqld_safe mysqld from pid file /var/run/cluster/mysql/mysql:rhelcms.pid ended