keepalived高可用双主lvs-dr模型集群

环境 centos6.8

在keepalived服务器上安装keepalived RS服务器上安装nginx ,安装过程省略

为了便于实验，四台机器将关闭iptables和selinux

配置如下：

K1：

#修改keepalived配置文件

vim /etc/keepalived/keepalived.conf

! Configuration File for keepalived
global_defs {
notification_email {
root@localhost            #邮件地址
}
notification_email_from Alexandre.Cassen@firewall.loc     #定义发件人
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id 192.168.37.133   #此为keepalived1服务器的IP
vrrp_mcast_group4 224.0.100.32     #定义多播地址
}
vrrp_instance nginx1 {       #节点名称
state BACKUP                #节点模式
interface eth0            #指定网卡名
virtual_router_id 51
priority 95            #权重
advert_int 1            #健康检查间隔时间，生产环境配置请慎重
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {         #指定VIP
192.168.37.200/16 dev eth0
}
}
virtual_server 192.168.37.200 80{      #指定虚拟服务器
delay_loop 6                          
lb_algo wrr                       #循环模式
lb_kind DR                        #LVS工作模式
protocol TCP                       #协议
real_server 192.168.37.134 80     #真实物理机的ip和端口
{
weight 2                         #权重
HTTP_GET {                      #健康检查的模式
url {
path /
status_code 200                  #如果返回状态码为200，则视为服务器健康   
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 192.168.37.135 80 {           #定义第二台真实服务器
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
} } }

   

    vrrp_instance nginx2 {    #定义第二台虚拟服务器



    state MASTER



    interface eth0



    virtual_router_id 34



    priority 100



    advert_int 1



    authentication {



    auth_type PASS



    auth_pass 2222



    }



    virtual_ipaddress {



    192.168.37.201/16 dev eth0



    }



    }



    virtual_server 192.168.37.201 80{



    delay_loop 6



    lb_algo wrr



    lb_kind DR



    protocol TCP



    real_server 192.168.37.134 80



    {



    weight 2



    HTTP_GET {



    url {



    path /



    status_code 200



    }



    connect_timeout 3



    nb_get_retry 3



    delay_before_retry 3



    }



    }



    real_server 192.168.37.135 80                {



    weight 1



    HTTP_GET {



    url {



    path /



    status_code 200



    }



    connect_timeout 3



    nb_get_retry 3



    delay_before_retry 3



    } }  }

#启动keeplived

service keepalived restart

K2：

修改keepalived配置文件

vim /etc/keepalived/keepalived.conf

! Configuration File for keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id 192.168.37.130
vrrp_mcast_group4 224.0.100.32
}
vrrp_instance nginx1 {
state MASTER
interface eth0
virtual_router_id 51
priority100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.37.200/16 dev eth0
}
}
virtual_server 192.168.37.200 80{
delay_loop 6
lb_algo wrr
lb_kind DR
protocol TCP
real_server 192.168.37.134 80
{
weight 2
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 192.168.37.135 80 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
} } }

   

    vrrp_instance nginx2 {



    state BACKUP



    interface eth0



    virtual_router_id 34



    priority 95



    advert_int 1



    authentication {



    auth_type PASS



    auth_pass 2222



    }



    virtual_ipaddress {



    192.168.37.201/16 dev eth0



    }



    }



    virtual_server 192.168.37.201 80{



    delay_loop 6



    lb_algo wrr



    lb_kind DR



    protocol TCP



    real_server 192.168.37.134 80



    {



    weight 2



    HTTP_GET {



    url {



    path /



    status_code 200



    }



    connect_timeout 3



    nb_get_retry 3



    delay_before_retry 3



    }



    }



    real_server 192.168.37.135 80                {



    weight 1



    HTTP_GET {



    url {



    path /



    status_code 200



    }



    connect_timeout 3



    nb_get_retry 3



    delay_before_retry 3



    } }  }

#启动keeplived

service keepalived restart

RS1：

#修改Nginx的首页为

echo “lvs1 RS1：192.168.37.135” > /usr/share/nginx/html/index.htm

#添加脚本

vim setpara.sh

   
    
        vim setpara.sh
    

    
        vip=192.168.37.200
    

    
        vip2=192.168.37.201
    

    
        mask='255.255.255.255'
    

    
        case $1 in
    

    
        start)
    

    
        echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
    

    
        echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore
    

    
        echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
    

    
        echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce
    

    
        ifconfig lo:0 $vip netmask $mask broadcast $vip up
    

    
        rgoute add -host $vip dev lo:0
    

    
        ifconfig lo:1 $vip2 netmask $mask broadcast $vip2 up
    

    
        rgoute add -host $vip2 dev lo:0
    

    
        ;;
    

    
        stop)
    

    
        ifconfig lo:0 down
    

    
        ifconfig lo:1 down
    

    
        echo 0 > /proc/sys/net/ipv4/conf/all/arp_ignore
    

    
        echo 0 > /proc/sys/net/ipv4/conf/lo/arp_ignore
    

    
        echo 0 > /proc/sys/net/ipv4/conf/all/arp_announce
    

    
        echo 0 > /proc/sys/net/ipv4/conf/lo/arp_announce
    

    
        
    

    
        ;;
    

    
        *)
    

    
        echo "Usage $(basename $0) start|stop"
    

    
        exit 1
    

    
        ;;
    

    
        esac

#执行脚本

bash setpara.sh start

#配置完毕，启动Nginx

service nginx restart

RS2：

修改Nginx的首页为

echo “lvs1 RS2：192.168.37.134” > /usr/share/nginx/html/index.html

添加脚本

   
    
        vim setpara.sh
    

    
        vip=192.168.37.200
    

    
        vip2=192.168.37.201
    

    
        mask='255.255.255.255'
    

    
        case $1 in
    

    
        start)
    

    
        echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
    

    
        echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore
    

    
        echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
    

    
        echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce
    

    
        ifconfig lo:0 $vip netmask $mask broadcast $vip up
    

    
        rgoute add -host $vip dev lo:0
    

    
        ifconfig lo:1 $vip2 netmask $mask broadcast $vip2 up
    

    
        rgoute add -host $vip2 dev lo:0
    

    
        ;;
    

    
        stop)
    

    
        ifconfig lo:0 down
    

    
        ifconfig lo:1 down
    

    
        echo 0 > /proc/sys/net/ipv4/conf/all/arp_ignore
    

    
        echo 0 > /proc/sys/net/ipv4/conf/lo/arp_ignore
    

    
        echo 0 > /proc/sys/net/ipv4/conf/all/arp_announce
    

    
        echo 0 > /proc/sys/net/ipv4/conf/lo/arp_announce
    

    
        
    

    
        ;;
    

    
        *)
    

    
        echo "Usage $(basename $0) start|stop"
    

    
        exit 1
    

    
        ;;
    

    
        esac

#执行脚本

bash setpara.sh start

#配置完毕，启动Nginx

service nginx restart

有关keepalived配置问题，已及LVS-DR模式的ARP抑制原理随后更新。

原创文章，作者：cnc，如若转载，请注明出处：http://www.178linux.com/75374

keepalived高可用双主lvs-dr模型集群

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