这几天学习了一下heartbeat的资料,想参照 Two Apache Web Servers in an Active/Active Configuration
做个Two Nginx Web Services in Active/Active HA。研究发现,heartbeat所管理的资源代理(Resource Agent),有OCF、LSB等几种
。LSB这种shell脚本我还能依葫芦画瓢的写一点,参考linux系统中的原有脚本和网上资料,写了一个很简单的:
#!/bin/bash
#
# nginx: Control the nginx Daemon
#
# Version: @(#) /etc/init.d/nginx 0.1
#
# description: This is a init.d script for nginx. Tested on CentOS4. \
# Change DAEMON and PIDFILE if neccessary.
#
#Location of nginx binary. Change path as neccessary
DAEMON=/usr/local/nginx/sbin/nginx
NAME=`basename $DAEMON`
#Pid file of nginx, should be matched with pid directive in nginx config file.
PIDFILE=/var/run/$NAME.pid
#this file location
SCRIPTNAME=/etc/init.d/$NAME
#only run if binary can be found
test -x $DAEMON || exit 0
RETVAL=0
start() {
echo $"Starting $NAME"
$DAEMON
RETVAL=0
}
stop() {
echo $"Graceful stopping $NAME"
[ -s "$PIDFILE" ] && kill -QUIT `cat $PIDFILE`
RETVAL=0
}
forcestop() {
echo $"Quick stopping $NAME"
[ -s "$PIDFILE" ] && kill -TERM `cat $PIDFILE`
RETVAL=$?
}
reload() {
echo $"Graceful reloading $NAME configuration"
[ -s "$PIDFILE" ] && kill -HUP `cat $PIDFILE`
RETVAL=$?
}
status() {
if [ -s $PIDFILE ]; then
echo $"$NAME is running."
RETVAL=0
else
echo $"$NAME stopped."
RETVAL=3
fi
}
# See how we were called.
case "$1" in
start)
start
;;
stop)
stop
;;
force-stop)
forcestop
;;
restart)
stop
start
;;
reload)
reload
;;
status)
status
;;
*)
echo $"Usage: $0 {start|stop|force-stop|restart|reload|status}"
exit 1
esac
exit $RETVAL
注意对应的Nginx配置的PID指令。
参考资料:
LSBResourceAgent
Running and Controlling Nginx
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