Nginx+Keepalived负载均衡+后端LNMP网站集群

Centos6.4 x86，4台，地址是10.10.10.11-14，vip给的100，目标是在13和14安装nginx+keepalived，11和12安装nginx+mysql+php，做为web，以下为配置步骤

1，安装epel源。

rpm -Uvh http://mirrors.kernel.org/fedora-epel/6/i386/epel-release-6-8.noarch.rpm

编辑/etc/yum.repos.d/epel.repo，把基础的恢复，镜像的地址注释掉，就是

#baseurl

mirrorlist

改成

baseurl

#mirrorlist

# yum repolist//出现一下输出表示成功

repo id           repo name                                              status

base              CentOS-6 - Base                                         6,367

epel              Extra Packages for Enterprise Linux 6 - i386         10,335

………

repolist: 17,600

2，四台机器全部执行下面命令，一步到位安装nginx,php,mysql

#yum -y install gcc pcre-devel zlib-devel openssl-devel nginx mysql mysql-server php-mysql php-gd libjpeg* php-imap php-ldap php-odbc php-pear php-xml php-xmlrpc php-mbstring php-mcrypt php-bcmath php-mhash libmcrypt libmcrypt-devel php-fpm

service nginx start

chkconfig  nginx on    #设为开机启动

chkconfig mysqld on

cp /usr/share/mysql/my-medium.cnf   /etc/my.cnf

/usr/bin/mysqladmin -u root password '123456'       #设置密码

/etc/init.d/mysqld start

chkconfig php-fpm on

vi /etc/php-fpm.d/www.conf

user = nginx   #修改用户为nginx

group = nginx

service php-fpm  start

vi /etc/nginx/conf.d/default.conf

index  index.php index.html index.htm;   #增加

location ~ \.php$ {

root           html;

fastcgi_pass   127.0.0.1:9000;

fastcgi_index  index.php;

fastcgi_param  SCRIPT_FILENAME   $document_root$fastcgi_script_name;

include        fastcgi_params;

}

service mysqld restart

service nginx  restart

访问phpinfo()，正常。

3，下面开始配置负载均衡，只在13和14这两台机器进行

先安装keepalived

wget http://www.keepalived.org/software/keepalived-1.2.15.tar.gz

tar xzf keepalived-1.2.15.tar.gz

cd keepalived-1.2.15

./configure

make && make install

cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/

cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/

cp /usr/local/sbin/keepalived /usr/sbin/

mkdir /etc/keepalived

cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/

chkconfig keepalived on

三处nginx要改的地方

upstream fuckyou

{

server 10.10.10.11;

server 10.10.10.12;

}

server {

listen       80;

server_name  10.10.10.100;//vip

location / {

proxy_pass http://fuckyou;

}

此时集群已经可以访问了，无论是访问13或者14的ip，都可以正常转到11或者12上面，下面开始配置keepalived了。

global_defs {

notification_email {

admin@xxx

}

notification_email_from keepalived@domain.com

smtp_server 127.0.0.1

smtp_connect_timeout 30

router_id LVS_DEVEL

}

vrrp_script chk_http_port {

script "/opt/nginx_pid.sh"

interval 2

weight 2

}

vrrp_instance VI_1 {

state MASTER      // BACKUP

interface eth1

virtual_router_id 51

mcast_src_ip 10.10.10.13

priority 102                //值要比 back 高

advert_int 1

authentication {

auth_type PASS

auth_pass 1111

}

track_script {

chk_http_port //监控

}

virtual_ipaddress {

10.10.10.100

}

}

从服务器：

global_defs {

notification_email {

admin@xxx

}

notification_email_from keepalived@domain.com

smtp_server 127.0.0.1

smtp_connect_timeout 30

router_id LVS_DEVEL

}

vrrp_script chk_http_port {

script "/opt/nginx_pid.sh"

interval 2

weight 2

}

vrrp_instance VI_1 {

state BACKUP

interface eth1

virtual_router_id 51

mcast_src_ip 10.10.10.14

priority 101             //值比 master 低。。

advert_int 1

authentication {

auth_type PASS

auth_pass 1111

}

track_script {

chk_http_port // 监控

}

virtual_ipaddress {

10.10.10.100

}

}

设置一下nginx的监控脚本

vi /opt/nginx_pid.sh

#!/bin/bash

A=`ps -C nginx --no-header |wc -l`

if [ $A -eq 0 ];then

/usr/local/nginx/sbin/nginx

sleep 3

if [ `ps -C nginx --no-header |wc -l` -eq 0 ];then

killall keepalived

fi

fi

OK，启动

service keepalived start

# ip addr

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

inet 127.0.0.1/8 scope host lo

inet6 ::1/128 scope host

valid_lft forever preferred_lft forever

2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

link/ether 00:50:56:34:03:5c brd ff:ff:ff:ff:ff:ff

inet 10.10.10.13/24 brd 10.10.10.255 scope global eth1

inet 10.10.10.100/32 scope global eth1

inet6 fe80::250:56ff:fe34:35c/64 scope link

valid_lft forever preferred_lft forever

4: pan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN

link/ether fe:2c:74:f5:26:70 brd ff:ff:ff:ff:ff:ff

vip已经起来了，访问一下10.10.10.100，OK。测试连接，此时nginx的负载均衡服务已经开启了，13,14两个负载均衡都已经启用（访问时候，都会自动转到11或者12的web页面上）

好久没配置这类东西了，还算顺利。