shell脚本一键部署lvs+keepalived

环境

两个调度器dr1、dr2，两台真实机rs1、rs2。两台真实机安装httpd，并编辑主页内容用于验证

vip="192.168.132.250"
dr1="192.168.132.120"
dr2="192.168.132.121"
rs1="192.168.132.131"
rs2="192.168.132.134"

配置

#/bin/bash
vip="192.168.132.250"
dr1="192.168.132.120"
dr2="192.168.132.121"
rs1="192.168.132.131"
rs2="192.168.132.134"

#dr1配置keepalived
yum install -y keepalived
cat > /etc/keepalived/keepalived.conf <<EOF
global_defs {
}

vrrp_instance VI_1 {
    state MASTER
    interface ens33
    virtual_router_id
    priority
    advert_int
    authentication {
        auth_type PASS
        auth_pass
    }
    virtual_ipaddress {
        $vip/
    }
}

virtual_server $vip  {
    delay_loop
    lb_algo rr
    lb_kind DR
    protocol TCP

    real_server $rs1  {
        weight
        TCP_CHECK {
            connect_timeout
            nb_get_retry
            delay_before_retry
        }
    }
    real_server $rs2  {
        weight
        TCP_CHECK {
            connect_timeout
            nb_get_retry
            delay_before_retry
        }
    }
}
EOF
systemctl restart keepalived

yum install -y ipvsadm sshpass
sed -i 35c"StrictHostKeyChecking no" /etc/ssh/ssh_config
setenforce
systemctl stop firewalld

#dr1复制keepalived文件到dr2
sshpass -p root ssh $dr2 "yum install -y keepalived"
sshpass -p root scp /etc/keepalived/keepalived.conf $dr2:/etc/keepalived/keepalived.conf

#dr2配置keepalived
dr2_cmd="
setenforce ;
systemctl stop firewalld;
sed -i 's/MASTER/BACKUP/g' /etc/keepalived/keepalived.conf;
sed -i 's/100/90/g' /etc/keepalived/keepalived.conf;
systemctl restart keepalived;
"
sshpass -p root ssh $dr2 "$dr2_cmd"

#rs1,rs2配置lvs
cmd="
setenforce ;
firewall-cmd --add-port=/tcp;
ifconfig lo: $vip broadcast $vip netmask 255.255.255.255 up;
route add -host $vip dev lo:;
echo "" > /proc/sys/net/ipv4/conf/lo/arp_ignore;
echo "" > /proc/sys/net/ipv4/conf/lo/arp_announce;
echo "" > /proc/sys/net/ipv4/conf/all/arp_ignore;
echo "" > /proc/sys/net/ipv4/conf/all/arp_announce;
service httpd restart
"
sshpass -p root ssh $rs1 "$cmd"
sshpass -p root ssh $rs2 "$cmd"