Running MySQL Proxy as a daemon
August 6th, 2008
I had to figure out how to setup mySQL Proxy to run as a daemon (system service).
The original information came from this page and has been slightly modified.
It is assumed that mySQL Proxy has been installed and the mysql-proxy executable is located at /usr/local/sbin/mysql-proxy.
The first file is the init.d launch script:
/etc/init.d/mysql-proxy
#!/bin/sh
#
# mysql-proxy This script starts and stops the mysql-proxy daemon
#
# chkconfig: - 78 30
# processname: mysql-proxy
# description: mysql-proxy is a proxy daemon to mysql
# Source function library.
. /etc/rc.d/init.d/functions
PROXY_PATH="/usr/local/sbin"
prog="mysql-proxy"
# Source networking configuration.
. /etc/sysconfig/network
# Check that networking is up.
[ ${NETWORKING} = "no" ] && exit 0
# Set default mysql-proxy configuration.
PROXY_OPTIONS="--daemon"
PROXY_PID=/var/run/mysql-proxy.pid
# Source mysql-proxy configuration.
if [ -f /etc/sysconfig/mysql-proxy ] ; then
. /etc/sysconfig/mysql-proxy
fi
PATH=$PATH:/usr/bin:/usr/local/bin:$PROXY_PATH
# By default it's all good
RETVAL=0
# See how we were called.
case "$1" in
start)
# Start daemon.
echo -n $"Starting $prog: "
daemon $NICELEVEL $PROXY_PATH/mysql-proxy $PROXY_OPTIONS --pid-file $PROXY_PID
RETVAL=$?
echo
if [ $RETVAL = 0 ]; then
touch /var/lock/subsys/mysql-proxy
fi
;;
stop)
# Stop daemons.
echo -n $"Stopping $prog: "
killproc $prog
RETVAL=$?
echo
if [ $RETVAL = 0 ]; then
rm -f /var/lock/subsys/mysql-proxy
rm -f $PROXY_PID
fi
;;
restart)
$0 stop
sleep 3
$0 start
;;
condrestart)
[ -e /var/lock/subsys/mysql-proxy ] && $0 restart
;;
status)
status mysql-proxy
RETVAL=$?
;;
*)
echo "Usage: $0 {start|stop|restart|status|condrestart}"
RETVAL=1
;;
esac
exit $RETVAL
The launch script will either use the default configuration or read it from the file /etc/sysconfig/mysql-proxy if it exists.
To set mysql-proxy parameters create:
/etc/sysconfig/mysql-proxy
# Options to mysql-proxy # do not remove --daemon PROXY_OPTIONS=" --daemon --proxy-backend-addresses=127.0.0.1:3306 --proxy-backend-addresses=127.0.0.1:3307 --proxy-lua-script=load-balancing.lua"