keepalived 双机热备配置

版权声明：转发原创文章请复制文章链接地址 https://blog.csdn.net/weixin_42579642/article/details/83993219

下载wget http://keepalived.org/software/keepalived-2.0.6.tar.gz

mkdir /usr/local/keepalived/

tar  -zxvf  keepalived-2.0.6.tar.gz  -C  /usr/local/keepalived

cd  /usr/local/keepalived/keepalived-2.0.6
./configure

make
make install
cp -r keepalived  /etc/init.d/keepalived
mkdir  /etc/keepalived/
cd /usr/local/keepalived/keepalived-2.0.6/keepalived/etc/keepalived
cp  keepalived.conf  /etc/keepalived/
cd /usr/local/keepalived/keepalived-2.0.6/keepalived/etc/sysconfig/
cp keepalived  /etc/sysconfig/keepalived
cp /usr/local/keepalived/keepalived-2.0.6/bin/keepalived /usr/sbin

vi  /etc/keepalived/keepalived.conf   #以下是配置的内容

vrrp_instance VI_1 {
    state MASTER
    interface ens33
    virtual_router_id 51
    priority 101
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.67.100
    }
}

以上修改了如下三项
1.
priority 101    #Master值要大于Bakcup
2.更改网络接口 
vrrp_instance VI_1 中interface:ens33(ip addr命令中的网络) 
3.
192.168.67.100 是虚拟ip

启动keepalived
service  keepalived  start或者systemctl start keepalived

备用调度服务器 只有一项不同
 priority 100
同样配置完毕后启动keepalived

注意:
#vrrp_strict      #这个注释掉，否则可能造成物理机的浏览器无法访问应用

启动keepalived  
service keepalived start
设置开机自启动
systemctl  enable  keepalived.service

参考https://blog.csdn.net/qq_42794720/article/details/81736669