#! /bin/bash
#
# nginx Start up the nginx server daemon
#
# chkconfig: 2345 55 25
# Description: starts and stops the nginx web server
#
### BEGIN INIT INFO
# Provides: nginx
# Required-Start: $all
# Required-Stop: $all
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Description: starts and stops the nginx web server
### END INIT INFO
# To install:
# copy this file to /etc/init.d/nginx
# shell> chkconfig --add nginx (RedHat)
# shell> update-rc.d -f nginx defaults (debian)
# To uninstall:
# shell> chkconfig --del nginx (RedHat)
# shell> update-rc.d -f nginx remove
PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin
NAME=nginx
DAEMON=/application/nginx/sbin/$NAME
CONFIGFILE=/application/nginx/conf/$NAME.conf
PIDFILE=/application/nginx/logs/$NAME.pid
ULIMIT=10240
set -e
[ -x "$DAEMON" ] || exit 0
do_start() {
echo "Starting $NAME ..."
ulimit -SHn $ULIMIT
$DAEMON -c $CONFIGFILE
}
do_stop() {
echo "Shutting down $NAME ..."
kill `cat $PIDFILE`
}
do_reload() {
echo "Reloading $NAME ..."
kill -HUP `cat $PIDFILE`
}
case "$1" in
start)
[ ! -f "$PIDFILE" ] && do_start || echo "nginx already running"
echo -e ".\ndone"
;;
stop)
[ -f "$PIDFILE" ] && do_stop || echo "nginx not running"
echo -e ".\ndone"
;;
restart)
[ -f "$PIDFILE" ] && do_stop || echo "nginx not running"
do_start
echo -e ".\ndone"
;;
reload)
[ -f "$PIDFILE" ] && do_reload || echo "nginx not running"
echo -e ".\ndone"
;;
*)
N=/etc/init.d/$NAME
echo "Usage: $N {start|stop|restart|reload}" >&2
exit 1
;;
esac
exit 0
下面对一些命令进行说明：
-H 设置硬资源限制，一旦设置不能增加。 ulimit – Hs 64；限制硬资源，线程栈大小为 64K。
-S 设置软资源限制，设置后可以增加，但是不能超过硬资源设置。 ulimit – Sn 32；限制软资源，32 个文件描述符。
-n 可以打开最大文件描述符的数量。 ulimit – n 128；限制最大可以使用 128 个文件描述符。
kill -HUP更改配置而不需停止并重新启动服务。