Linux下創(chuàng)建nginx腳本-start、stop、reload…，nginx-start
Jun 13, 2016 am 09:27 AM
Linux下創(chuàng)建nginx腳本-start、stop、reload…，nginx-start
1、關(guān)閉nginx
利用ps -aux | grep nginx 查看nginx是否啟動(dòng) 如果啟動(dòng)了就kill殺死
2、創(chuàng)建/etc/init.d/nginx文件
root@dnnp:~/software/nginx-1.2.3# vim /etc/init.d/nginx
3、添加權(quán)限并啟動(dòng)
root@dnnp:~/software/nginx-1.2.3# chmod +x /etc/init.d/nginx root@dnnp:~/software/nginx-1.2.3# /etc/init.d/nginx start Starting nginx: nginx. root@dnnp:~/software/nginx-1.2.3# ps -aux | grep nginx Warning: bad ps syntax, perhaps a bogus '-'? See http://procps.sf.net/faq.html root 25078 0.0 0.0 4596 700 ? Ss 14:20 0:00 nginx: master process /usr/local/nginx/sbin/nginx nobody 25079 0.0 0.1 4820 1056 ? S 14:20 0:00 nginx: worker process root 25081 0.0 0.0 3304 768 pts/0 S+ 14:20 0:00 grep nginx root@dnnp:~/software/nginx-1.2.3#
注：/etc/init.d/nginx文件內(nèi)容如下
#! /bin/sh
### BEGIN INIT INFO
# Provides: nginx
# Required-Start: $all
# Required-Stop: $all
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: starts the nginx web server
# Description: starts nginx using start-stop-daemon
### END INIT INFO
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/usr/local/nginx/sbin/nginx
NAME=nginx
DESC=nginx
test -x $DAEMON || exit 0
# Include nginx defaults if available
if [ -f /etc/default/nginx ] ; then
. /etc/default/nginx
# . /usr/local/nginx/conf
fi
set -e
. /lib/lsb/init-functions
case "$1" in
start)
echo -n "Starting $DESC: "
start-stop-daemon --start --quiet --pidfile /usr/local/nginx/logs/$NAME.pid \
--exec $DAEMON -- $DAEMON_OPTS || true
echo "$NAME."
;;
stop)
echo -n "Stopping $DESC: "
start-stop-daemon --stop --quiet --pidfile /usr/local/nginx/logs/$NAME.pid \
--exec $DAEMON || true
echo "$NAME."
;;
restart|force-reload)
echo -n "Restarting $DESC: "
start-stop-daemon --stop --quiet --pidfile \
/usr/local/nginx/logs/$NAME.pid --exec $DAEMON || true
sleep 1
start-stop-daemon --start --quiet --pidfile \
/usr/local/nginx/logs/$NAME.pid --exec $DAEMON -- $DAEMON_OPTS || true
echo "$NAME."
;;
reload)
echo -n "Reloading $DESC configuration: "
start-stop-daemon --stop --signal HUP --quiet --pidfile /usr/local/nginx/logs/$NAME.pid \
--exec $DAEMON || true
echo "$NAME."
;;
status)
status_of_proc -p /usr/local/nginx/logs/$NAME.pid "$DAEMON" nginx && exit 0 || exit $?
;;
*)
N=/etc/init.d/$NAME
echo "Usage: $N {start|stop|restart|reload|force-reload|status}" >&2
exit 1
;;
esac
exit 0
在nginx的早期版本，nginx重啟需要通過kill命令向nginx發(fā)送信號(hào)來實(shí)現(xiàn)nginx的重啟。
但是，現(xiàn)在，nginx增加了-s選項(xiàng)，實(shí)現(xiàn)nginx的停止，重新加載功能。
1. 如果是平滑的重啟nginx，可以用./nginx -s reload命令實(shí)現(xiàn)nginx的平滑重啟。
2. 如果是非平滑重啟，則可以先停止nginx，然后再啟動(dòng)：
./nginx -s stop && ./nginx
當(dāng)我們修改nginx配置后，希望重啟nginx以便讓nginx生效，此時(shí)為了保證nginx在重啟階段還能夠提供正常的服務(wù)，一般采用平滑重啟的方式（reload）重啟nginx。此時(shí)，nginx會(huì)加載新的配置，然后fork出新的worker進(jìn)程。同時(shí)，master進(jìn)程會(huì)向老的worker進(jìn)程發(fā)送信號(hào)，告訴老的worker進(jìn)程當(dāng)前的情況。老的worker進(jìn)程受到master進(jìn)程的信號(hào)后，如果當(dāng)時(shí)沒有處理請(qǐng)求則會(huì)退出，如果正在處理請(qǐng)求，則老的worker進(jìn)程會(huì)處理完請(qǐng)求然后退出。nginx就是通過這種方式去reload新的配置，從而使得在重啟的過程中，仍然可以提供服務(wù)。
?
start 啟動(dòng)服務(wù) stop 停止服務(wù) reload 重讀配置 restart 重啟服務(wù)
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