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。
