如何搭建keepalived+nginx+httpd+dns高可用双主反向代理服务器

如何搭建keepalived+nginx+httpd+dns高可用双主反向代理服务器 一、背景介绍 由于需要提供高可用的Web服务，所以需要搭建一套keepalived+nginx+httpd+dns高可用双主反向代理服务器。 二、硬件环境 两台物理服务器，配置如下： CPU：4核 内存：8G 硬盘：500G 操作系统：CentOS 6.5 网络：1Gbps 三、软件环境 1、keepalived：用于高可用性负载均衡和故障转移 2、nginx：Web服务器 3、httpd：Web服务器 4、dns：域名解析服务器 四、架构设计 1、系统架构图 2、 keepalived配置 global_defs { router_id LVS_DEVEL } vrrp_instance VI_1 { state MASTER interface eth0 virtual_router_id 51 priority 101 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.0.100 } } 3、 nginx配置 upstream keepalived_cluster { server 192.168.0.100:80; server 192.168.0.101:80; } server { listen 80; server_name www.test.com; index index.html index.htm; location / { proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_pass http://keepalived_cluster; } } 4、httpd配置 ServerAdmin webmaster@dummy-host2.x DocumentRoot /usr/local/apache2/htdocs ServerName www.test.com ErrorLog logs/dummy-host2.x-error_log CustomLog logs/dummy-host2.x-access_log common 5、dns配置 zone "test.com" IN { type master; file "test.com.zone"; allow-update { none; }; }; 五、实施步骤 1、在两台服务器上安装keepalived、nginx、httpd、dns软件 2、配置keepalived、nginx、httpd、dns 3、启动keepalived、nginx、httpd、dns 4、设置域名解析 6、验证 1、查看keepalived状态 [root@node1 ~]# service keepalived status keepalived (pid 4598) is running... [root@node2 ~]# service keepalived status keepalived (pid 4602) is running... 2、查看nginx状态 [root@node1 ~]# service nginx status nginx is running [root@node2 ~]# service nginx status nginx is running 3、查看httpd状态 [root@node1 ~]# service httpd status httpd (pid 4485) is running... [root@node2 ~]# service httpd status httpd (pid 4489) is running... 4、查看dns状态 [root@node1 ~]# service named status named (pid 4473) is running... [root@node2 ~]# service named status named (pid 4477) is running... 5、访问Web服务 通过域名www.test.com访问Web服务，可以看到页面正常访问。