Nginx反向代理及负载均衡实现过程
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[root@nginx ~]
# ntpdate 202.120.2.101
[root@web1 ~]
# ntpdate 202.120.2.101
[root@web2 ~]
# ntpdate 202.120.2.101
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[root@nginx ~]
# service iptables stop
[root@nginx ~]
# chkconfig iptables off
[root@nginx ~]
# getenforce
Disabled
[root@web1 ~]
# service iptables stop
[root@web1 ~]
# chkconfig iptables off
[root@web1 ~]
# getenforce
Disabled
[root@web2 ~]
# service iptables stop
[root@web2 ~]
# chkconfig iptables off
[root@web2 ~]
# getenforce
Disabled
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[root@nginx src]
# groupadd -g 108 -r nginx
[root@nginx src]
# useradd -u 108 -r -g 108 nginx
[root@nginx src]
# id nginx
uid=108(nginx) gid=108(nginx) 组=108(nginx)
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[root@nginx ~]
# cat /etc/init.d/nginx
#!/bin/sh
#
# nginx - this script starts and stops the nginx daemon
#
# chkconfig: - 85 15
# description: Nginx is an HTTP(S) server, HTTP(S) reverse \
# proxy and IMAP/POP3 proxy server
# processname: nginx
# config: /etc/nginx/nginx.conf
# config: /etc/sysconfig/nginx
# pidfile: /var/run/nginx.pid
# Source function library.
.
/etc/rc
.d
/init
.d
/functions
# Source networking configuration.
.
/etc/sysconfig/network
# Check that networking is up.
[
"$NETWORKING"
=
"no"
] &&
exit
0
nginx=
"/usr/sbin/nginx"
prog=$(
basename
$nginx)
NGINX_CONF_FILE=
"/etc/nginx/nginx.conf"
[ -f
/etc/sysconfig/nginx
] && .
/etc/sysconfig/nginx
lockfile=
/var/lock/subsys/nginx
make_dirs() {
# make required directories
user=`nginx -V 2>&1 |
grep
"configure arguments:"
|
sed
's/[^*]*--user=\([^ ]*\).*/\1/g'
-`
options=`$nginx -V 2>&1 |
grep
'configure arguments:'
`
for
opt
in
$options;
do
if
[ `
echo
$opt |
grep
'.*-temp-path'
` ];
then
value=`
echo
$opt |
cut
-d
"="
-f 2`
if
[ ! -d
"$value"
];
then
# echo "creating" $value
mkdir
-p $value &&
chown
-R $user $value
fi
fi
done
}
start() {
[ -x $nginx ] ||
exit
5
[ -f $NGINX_CONF_FILE ] ||
exit
6
make_dirs
echo
-n $
"Starting $prog: "
daemon $nginx -c $NGINX_CONF_FILE
retval=$?
echo
[ $retval -
eq
0 ] &&
touch
$lockfile
return
$retval
}
stop() {
echo
-n $
"Stopping $prog: "
killproc $prog -QUIT
retval=$?
echo
[ $retval -
eq
0 ] &&
rm
-f $lockfile
return
$retval
}
restart() {
configtest ||
return
$?
stop
sleep
1
start
}
reload() {
configtest ||
return
$?
echo
-n $
"Reloading $prog: "
killproc $nginx -HUP
RETVAL=$?
echo
}
force_reload() {
restart
}
configtest() {
$nginx -t -c $NGINX_CONF_FILE
}
rh_status() {
status $prog
}
rh_status_q() {
rh_status >
/dev/null
2>&1
}
case
"$1"
in
start)
rh_status_q &&
exit
0
$1
;;
stop)
rh_status_q ||
exit
0
$1
;;
restart|configtest)
$1
;;
reload)
rh_status_q ||
exit
7
$1
;;
force-reload)
force_reload
;;
status)
rh_status
;;
condrestart|try-restart)
rh_status_q ||
exit
0
;;
*)
echo
$
"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload|configtest}"
exit
2
esac
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[root@nginx ~]
# chmod +x /etc/init.d/nginx
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[root@nginx ~]
# chkconfig --add nginx
[root@nginx ~]
# chkconfig nginx on
[root@nginx ~]
# chkconfig nginx --list
nginx 0:关闭 1:关闭 2:启用 3:启用 4:启用 5:启用 6:关闭
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[root@nginx ~]
# service nginx start
正在启动 nginx：
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[root@nginx ~]
# netstat -ntlp | grep :80
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