OK, so I have just done a clean install of CentOS with minimal installation, and tried the script, same error:
Starting rabbitmq-server: FAILED - check /var/log/rabbitmq/startup_{log, _err}
rabbitmq-server.
Command failure: /sbin/service rabbitmq-server start
Ahhhhh!
I also added the "chown rabbitmq:rabbitmq /var/lib/rabbitmq/mnesia" before the "enable_service rabbitmq-server" trick but:
Complete!
chown: cannot access `/var/lib/rabbitmq/mnesia': No such file or directory
Starting rabbitmq-server: FAILED - check /var/log/rabbitmq/startup_{log, _err}
rabbitmq-server.
Command failure: /sbin/service rabbitmq-server start
Double Ahhhhhhh.