掌握Nginx +keepalived+varnish+lamp实现高可用、负载均衡集群的方法

下文给大家带来掌握Nginx +keepalived+varnish+lamp实现高可用、负载均衡集群的方法，希望能够给大家在实际运用中带来一定的帮助，负载均衡涉及的东西比较多，理论也不多，网上有很多书籍，今天我们就用在行业内累计的经验来做一个解答。

描述：
1、前端两台NGINX，通过keepalived虚拟IP漂移，实现前端两台NGINX高可用；
2、利用NGINX反向代理功能对后端varnish实现高可用集群,

3、再通过varnish实现动静分离

注：1、先装Nginx +keepalived
2、装varnish
3、装lamp
需要6台虚拟机（100-101装Nginx +keepalived：100主，101备）需要联网（102-103装varnish）需要联网（104-105装lamp）需要联网

所有主机必做的步骤systemctl stop firewalld      //关闭防火墙setenforce 0         //关闭监控

1、装Nginx +keepalived（两台机子都要做的）（100主101备）systemctl stop firewalld      //关闭防火墙setenforce 0         //关闭监控cd /etc/yum.repos.d/mv back/* ./

yum install -y epel-release

yum install -y nginx

yum install keepalived -y  

--------------------------------

主（80.100）

vi /etc/keepalived/keepalived.conf(把里面内容全删了添加以下内容)! Configuration File for keepalived global_defs {         route_id NGINX-01    }vrrp_script nginx {        script "/opt/nginx.sh"        interval 2        weight -10}vrrp_instance VI_1 {    state MASTER    interface ens32    virtual_router_id 51    priority 150    advert_int 1    authentication {        auth_type PASS        auth_pass 1111    }    track_script {        nginx        }    virtual_ipaddress {        192.168.80.188    }}

scp /etc/keepalived/keepalived.conf root@192.168.80.101:/etc/keepalived/keepalived.conf

备（80.101）

vi /etc/keepalived/keepalived.conf（修改以下画圈部分）

主（80.100）

vi /opt/nginx.sh（添加以下内容）#!/bin/bashA=$(ps -ef | grep keepalived | grep -v grep | wc -l)if [ $A -gt 0 ];then        systemctl start nginxelse        systemctl sop nginxfi

chmod +x /opt/nginx.shll /opt/nginx.sh

netstat -anpt | grep nginxsystemctl start keepalivednetstat -anpt | grep nginx

ip addr show ens32

备（80.101）

vi /opt/nginx.sh（添加以下内容）#!/bin/bashA=$(ip addr | grep 192.168.80.188/32 | grep -v grep | wc -l)if [ $A -gt 0 ];then        systemctl start nginx else        systemctl stop nginxfi

chmod +x /opt/nginx.shsystemctl start keepalivedcat /var/log/messages

主（80.100）

cat /var/log/messages

vi /etc/nginx/nginx.conf（修改以下内容）upstream varnish_pool {              server 192.168.80.102:80;              server 192.168.80.103:80;       }proxy_pass http://varnish_pool;proxy_set_header Host $host;proxy_set_header X-Forwarded-For $remote_addr;

nginx -t

scp /etc/nginx/nginx.conf 192.168.80.101:/etc/nginx/nginx.conf

systemctl restart nginx

2、装varnish（80.102,80.103）（两台机子都需要做）systemctl stop firewalld      //关闭防火墙setenforce 0         //关闭监控cd /etc/yum.repos.d/mv back/* ./yum  install epel-release -y  //需要联网

yum install -y varnish

--------------------------------

vi /etc/varnish/varnish.params（修改环圈部分）

vi /etc/varnish/default.vcl（修改添加以下部分）backend web1 {    .host = "192.168.80.104";    .port = "80";}backend web2 {    .host = "192.168.80.105";    .port = "80";}sub vcl_recv {if (req.url ~ "(?i)\.php$"){    set req.backend_hint = web1;}else{    set req.backend_hint = web2;}

systemctl  start varnishnetstat -anpt | grep varnish

80.103

vi /etc/varnish/varnish.params（修改以下内容）

（80.102）

scp /etc/varnish/default.vcl 192.168.80.103:/etc/varnish/default.vcl

80.103

systemctl start varnishnetstat -anpt | grep varnish

3、装lamp（两台机子都要做的）（100主101备）systemctl stop firewalld      //关闭防火墙setenforce 0         //关闭监控cd /etc/yum.repos.d/mv back/* ./安装wgetyum install -y  wget

yum install -y httpd

systemctl start httpdsystemctl enable httpd获取rpm软件包：wget http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm

安装rpm包rpm -ivh mysql-community-release-el7-5.noarch.rpm

安装mysqlyum install -y mysql-community-server

启动 systemctl start mysqlsystemctl enable mysql修改root密码并设置允许远程连接进入mysql  mysql -uroot

设置root密码为123456set password for 'root'@'localhost' =password('123456');设置允许用root账户进行远程连接，并设置其密码为123456grant all privileges on *.* to root@'%'identified by '123456';修改的配置立即生效flush privileges;退出：exit

部署phpyum install -y php

安装组件是php支持mysql yum install -y \php-mysql \php-gd \libjpeg* \php-ldap \php-odbc \php-pear \php-xml \php-xmlrpc \php-mbstring \php-bcmath \php-mhash

--------------------------------

80.104

vi /etc/httpd/conf/httpd.conf（修改以下内容）ServerName www.example.com:80去掉#号

systemctl start httpdecho "
192.168.80.101
" > /var/www/html/index.php

80.105

vi /etc/httpd/conf/httpd.conf（修改以下内容）ServerName www.example.com:80去掉#号

systemctl start httpdecho "
192.168.80.102
" > /var/www/html/index.html

任务栏搜索192.168.80.100

任务栏搜索192.168.80.102

任务栏搜索192.168.80.103

任务栏搜索192.168.80.104

任务栏搜索192.168.80.105

任务栏搜索192.168.80.188

看了以上关于掌握Nginx +keepalived+varnish+lamp实现高可用、负载均衡集群的方法，如果大家还有什么地方需要了解的可以在行业资讯里查找自己感兴趣的或者找我们的专业技术工程师解答的，技术工程师在行业内拥有十几年的经验了。