[系统运维]keepalived搭建服务器高可用

keepalived源码包下载地址：Keepalived for Linux

下载完之后传到服务器上

检查安装环境

yum install curl gcc openssl-devel libnl3-devel net-snmp-devel libnfnetlink-devel -y

进入源码包目录

解压

tar xf keepalived-2.1.5.tar.gz

cd keepalived-2.1.5

编译

./configure --prefix=/usr/local/keepalived --sysconf=/etc

安装

make && make install

配置

主备节点分别修改配置

vi /etc/keepalived/keepalived.conf

! Configuration File for keepalived
       
global_defs {
notification_email {
ops@wangshibo.cn
tech@wangshibo.cn
}
       
notification_email_from ops@wangshibo.cn
smtp_server 127.0.0.1 
smtp_connect_timeout 30
router_id MASTER-HA
}
       
       
vrrp_instance VI_1 {
    state MASTER # MASTER为主实例,BACKUP 为从实例
    interface ens33 # 网卡名称
    virtual_router_id 51 # 主备这里要配置为同样的
    priority 100 # 优先级,主要高于备. 一般主配置为100  备配置为80
    advert_int 1
    authentication {
        auth_type PASS # 主备必须配置成同样的
        auth_pass 1111 # 主备必须配置成同样的
    }
    virtual_ipaddress {
        192.168.6.100 # vip主备必须配置一样
    }
      
}

启动服务

systemctl restart keepalived

查看IP

ip a

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:8c:ce:78 brd ff:ff:ff:ff:ff:ff
    inet 192.168.230.102/24 brd 192.168.230.255 scope global noprefixroute ens33
       valid_lft forever preferred_lft forever
    inet 192.168.230.104/32 scope global ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::6989:66c5:4e66:4eb5/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever