LVS+Keepalived部署

1.环境说明

        六台服务器，两台作为director，四台作为两组real server。director为10.8.8.110（keepalived master）和10.8.8.111（keepalived backup），vip：10.8.8.112。两组real server为10.8.8.101:80,10.8.8.102:80和10.8.8.105:8889,10.8.8.106:8889

2.安装和配置LVS

        两台director上安装ipvadm

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yum install -y ipvsadm

        两台director上编写DR模式脚本

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vim /usr/local/sbin/lvs_dr.sh

        添加内容

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#! /bin/bash
echo 1 > /proc/sys/net/ipv4/ip_forward
ipv=/sbin/ipvsadm
vip=10.8.8.112
rs1=10.8.8.101
rs2=10.8.8.102
rs3=10.8.8.105
rs4=10.8.8.106
$ipv -C
$ipv -A -t $vip:80 -s rr 
$ipv -a -t $vip:80 -r $rs1:80 -g -w 1
$ipv -a -t $vip:80 -r $rs2:80 -g -w 1
$ipv -A -t $vip:8889 -s rr
$ipv -a -t $vip:8889 -r $rs3:8889 -g -w 1
$ipv -a -t $vip:8889 -r $rs4:8889 -g -w 1

        然后在四台real server上编写脚本

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vim /usr/local/sbin/lvs_dr_rs.sh

        添加内容

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#! /bin/bash
vip=10.8.8.112
ifconfig lo:0 $vip broadcast $vip netmask 255.255.255.255 up 
route add -host $vip 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

3.安装Keepalived

        两台director上执行

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yum install -y keepalived

        两台director上编辑配置文件

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vim /etc/keepalived/keepalived.conf

        加入配置

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vrrp_instance VI_1 {
    state MASTER     //备上为BACKUP
    interface eno16777984    //备的网卡名
    #lvs_sync_daemon_inteface eno16777984
    virtual_router_id 51
    priority 100    //备为90
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        10.8.8.112
    }
}
virtual_server 10.8.8.112 80 {
    delay_loop 3
    lb_algo wlc
    lb_kind DR
    nat_mask 255.255.255.0
    persistence_timeout 60
    protocol TCP
    real_server 10.8.8.101 80 {
        weight 100
        TCP_CHECK {
        connect_timeout 10
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
    }
    real_server 10.8.8.102 80 {
        weight 100
        TCP_CHECK {
        connect_timeout 10
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
    }
}
virtual_server 10.8.8.112 8889 {
    delay_loop 3
    lb_algo wlc
    lb_kind DR
    nat_mask 255.255.255.0
    persistence_timeout 60
    protocol TCP
    real_server 10.8.8.105 8889 {
        weight 100
        TCP_CHECK {
        connect_timeout 10
        nb_get_retry 3
        delay_before_retry 3
        connect_port 8889
        }
    }
    real_server 10.8.8.106 8889 {
        weight 100
        TCP_CHECK {
        connect_timeout 10
        nb_get_retry 3
        delay_before_retry 3
        connect_port 8889
        }
    }
}

4.启动LVS+Keepalived

        两台director执行脚本

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sh /usr/local/sbin/lvs_dr.sh

        两台director启动keepalived

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systemctl start keepalived

        四台real server执行脚本

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sh /usr/local/sbin/lvs_dr_rs.sh

        LVS+Keepalived部署完成