Centos7.4下keepalived-1.3.5的安装使用

1、安装依赖（本文使用的Centos7.4是最小安装，部分依赖不全，所以需要先安装依赖）

yum install -y gcc gcc-c++  openssl-devel

2、下载keepalived-1.3.5压缩包，并解压，步骤略

3、进入解压后的目录中，执行以下命令：

./configure --prefix=/usr/local/keepalived && make && make install
cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
mkdir -p /etc/keepalived
cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf
cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
cp /usr/local/keepalived-1.3.5/keepalived/etc/init.d/keepalived /etc/init.d/
chmod 755 /etc/init.d/keepalived

4、编辑keepalived.service

vi /lib/systemd/system/keepalived.service

将所有的字符串 “/usr/local/keepalived” 替换为空白，vi编辑器命令:【%s/\/usr\/local\/keepalived//g】

5、刷新配置

systemctl daemon-reload

6、编辑/etc/keepalived/keepalived.conf配置为自己的配置，详情参照传送门，示例：

global_defs {
    router_id LVS_DEVEL
}

vrrp_instance VI_1 {
    state MASTER
    interface eno16780032
    virtual_router_id 151
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass inspur
    }

    virtual_ipaddress {
        192.168.10.175
    }
}


virtual_server 192.168.10.175 5555 {
    delay_loop 6
    lb_algo rr
    lb_kind DR
    nat_mask 255.255.255.255
    persistence_timeout 0
    protocol TCP

    real_server 192.168.10.181 5555 {
        weight 100
        TCP_CHECK {
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
            connect_port 5555
        }
    }

    real_server 192.168.10.182 5555 {
        weight 100
        TCP_CHECK {
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
            connect_port 5555
        }
    }
}

该示例为备用节点上的配置

7、在各个Real Server中添加脚本，命名为【rs.sh】，摘自上方的传送门中的内容：

SNS_VIP=$2
#/etc/rc.d/init.d/functions
case "$1" in
start)
       ifconfig lo:0 $SNS_VIP netmask 255.255.255.255 broadcast $SNS_VIP
       /sbin/route add -host $SNS_VIP dev lo:0
       echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
       echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
       echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
       echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
       sysctl -p >/dev/null 2>&1
       echo "RealServer Start OK"
       ;;
stop)
       ifconfig lo:0 down
       route del $SNS_VIP >/dev/null 2>&1
       echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore
       echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce
       echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore
       echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce
       echo "RealServer Stoped"
       ;;
*)
       echo "Usage: $0 {start|stop}"
       exit 1
esac
exit 0

增加执行权限：

chmod 755 rs.sh

执行：

./rs.sh start [VIP]

8、在主节点上执行

systemctl start keepalived

Centos7.4下keepalived-1.3.5的安装使用

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