一、nginx 編譯安裝
1.依賴環境安裝
yum -y install gcc gcc-c++ zlib zlib-devel pcre pcre-devel openssl openssl-devel
yum -y install kernel-devel Popt popt-devel
yum -y groupinstall "Development Tools" "Development Libraries"

2.編譯安裝
[[email protected] src]# tar -xvf nginx-1.8.0.tar.gz
[[email protected] nginx-1.8.0]#cd nginx-1.8.0

[[email protected] nginx-1.8.0]# ./configure --with-http_stub_status_module --with-http_dav_module --with-http_addition_module --with-http_sub_module --with-http_flv_module --with-http_mp4_module --with-http_ssl_module
[[email protected] nginx-1.8.0]# make && make install

3.添加腳本
[[email protected]]# vim /etc/init.d/nginx
#---------------------------------------------------------------------------------------------------------------------------
#!/bin/sh
#
# nginx - this script starts and stops the nginx daemin
#
# chkconfig: - 85 15
# description: Nginx is an HTTP(S) server, HTTP(S) reverse \

# 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/local/nginx/sbin/nginx"
prog=$(basename $nginx)

NGINX_CONF_FILE="/usr/local/nginx/conf/nginx.conf"

lockfile=/var/lock/subsys/nginx

start() {
[ -x $nginx ] || exit 5
[ -f $NGINX_CONF_FILE ] || exit 6
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
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

#---------------------------------------------------------------------------------------------------------------------------
[[email protected]]# chmod +x /etc/init.d/nginx

二、配置upstream 模塊
配置nginx.conf配置文件
1.在http{}中添加一個upstream.conf配置文件
include /usr/local/nginx/conf/upstream.conf;
upstream www_test {
#ip_hash; #如要看到測輪循的效果,這裏需註釋掉
server 192.168.0.116:80;
server 192.168.0.40:80;
}

2.將http{}中的server模塊單獨提取出來
include /usr/local/nginx/vhost/*.conf;

配置test 服務 /usr/local/nginx/vhost/test.conf
server {
listen 80;
server_name localhost;

location / {
proxy_pass http://www_test;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}

三、安裝配置keeplived服務
1.安裝
兩臺前端nginx 開啟upstream的服務器安裝keepalived服務

[[email protected] src]# tar -xvf keepalived-1.1.15.tar.gz
[[email protected] src]# cd keepalived-1.1.15
[[email protected] keepalived-1.1.15]# ./configure --prefix=/usr/local/keepalived
[[email protected] keepalived-1.1.15]# make && make install

[[email protected] keepalived-1.1.15]# cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
[[email protected] keepalived-1.1.15]# cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
[[email protected] keepalived-1.1.15]# cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
[[email protected] keepalived-1.1.15]# cp -r /usr/local/keepalived/etc/keepalived/ /etc/

[[email protected] keepalived-1.1.15]# /etc/init.d/keepalived start

2.修改配置文件
[[email protected] keepalived-1.1.15]# vim /etc/keepalived/keepalived.conf
global_defs {
notification_email {
[email protected]
}
notification_email_from [email protected]
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id node1
}

vrrp_instance VI_1 {
state MASTER #主設置MASTER 從設置為BACKUP
interface eth0 #eth0 為自己的網卡，要通過ifconfig 查看己的網卡名
virtual_router_id 51
priority 100 #備機要小於主
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.0.200 #虛擬IP
}
}

virtual_server 192.168.0.200 80 {
delay_loop 6
lb_algo rr
lb_kind DR
nat_mask 255.255.255.0
persistence_timeout 50
protocol TCP

real_server 192.168.0.116 80 {
weight 1
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 192.168.0.40 80 {
weight 1
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}

[[email protected] ]# /etc/init.d/keepalived start #keepalived 服務啟動命令

四、後端可拿兩臺web 服務器來做測試即可

nginx+keeplived負載均衡配置