centos7安装keepalived

一、基础环境

系统版本	nginx版本	keepalived版本	ip	作用
CentOS Linux release 7.5.1804 (Core)	nginx/1.16.1	keepalived-2.0.18	10.1.1.31	master
CentOS Linux release 7.5.1804 (Core)	nginx/1.16.1	keepalived-2.0.18	10.1.1.32	slave

VIP 10.1.1.111

二、安裝nginx

1. 安裝nignx

   yum install nginx -y

2. 修改nginx配置文件

   • master

     echo 'this is master 31' > /usr/share/nginx/html/index.html

   • slave

     echo 'this is slave 32' > /usr/share/nginx/html/index.html 

3. 启动nginx

   systemctl start nginx 

4. 测试nginx启动

   curl localhost this is master

三、安装keepalived

1、 创建依赖环境

yum -y install openssl-devel gcc gcc-c++ mkdir /etc/keepalived wget https://www.keepalived.org/software/keepalived-2.0.18.tar.gz

2、安装keepalived

tar -zxvf keepalived-2.0.18.tar.gz mv keepalived-2.0.18 /usr/local/keepalived cd /usr/local/keepalived ./configure && make && make install

3、创建启动文件

cp  -a /usr/local/etc/keepalived   /etc/init.d/ cp  -a /usr/local/etc/sysconfig/keepalived    /etc/sysconfig/ cp  -a /usr/local/sbin/keepalived    /usr/sbin/

4、创建配置文件

1. master

   cat > /etc/keepalived/keepalived.conf << EOF ! Configuration File for keepalived global_defs { router_id 31 } vrrp_instance VI_1 { state MASTER interface ens33 virtual_router_id 3 mcast_src_ip 10.1.1.132 priority 200 advert_int 1 authentication { auth_type PASS auth_pass 123456 } virtual_ipaddress { 10.1.1.111/24 } } EOF

2. slave

   cat > /etc/keepalived/keepalived.conf << EOF ! Configuration File for keepalived global_defs { router_id 32 } vrrp_instance VI_1 { state BACKUP interface ens33 virtual_router_id 3 mcast_src_ip 10.1.1.132 priority 90 advert_int 1 authentication { auth_type PASS auth_pass 123456 } virtual_ipaddress { 10.1.1.111/24 } } EOF

5、启动keepalived

systemctl start keepalived systemctl enable keepalived

四、测试

1、在两台服务器上测试

1. master

   $ curl localhost this is master root@centos7[14:46:07]:~ $ curl 10.1.1.111 this is master root@centos7[15:03:29]:~

2. slave

   $ curl localhost this is slave root@centos7[15:03:59]:/etc/keepalived $ curl 10.1.1.111 this is master

2、关闭master的keepalived模仿down机

1. master关闭keepalived

   $ systemctl stop keepalived 

2. 在slave上面进行测试

$ curl localhost this is slave root@centos7[15:10:29]:/etc/keepalived $ curl 10.1.1.111 this is slave

到此keepalived完成