LVS Keepalived之DR模式配置 - morris131/morris-book GitHub Wiki

网络拓扑图如下：

  1. RealServer服务器的配置 1). 安装httpd 2). 配置ip 192.168.92.131 3). 编辑脚本并运行

[root@chen ~]# cat /etc/init.d/lvs_DR_node

#!/bin/sh

#descript : start real server DR

VIP=192.168.92.100

. /etc/rc.d/init.d/functions

case "$1" in

   start)

         echo "start LVS of RealServer DR"

         ifconfig lo:0 $VIP/32 broadcast $VIP up

         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 "Real Server Start OK!"

           ;;

   stop)

         ifconfig lo:0 down

         echo "close LVS of RealServer DR"

     route del $VIP > /dev/null 2>&1

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

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

          ;;

     *)

          echo "Usage : $0 {start|stop}"

          exit 1

esac

[root@chen ~]# cd /etc/init.d/

[root@chen init.d]# chmod a+x /etc/init.d/lvs_DR_node

[root@chen init.d]# /etc/init.d/lvs_DR_node start

start LVS of RealServer DR

Real Server Start OK!

4). 启动httpd

  1. Master服务器的配置 1). 配置ip 192.168.92.130 2). 安装ipvsadm 3). 安装keepalived 4). 配置keepalived

[root@chen keepalived]# cat /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

router_id LVS_DEVEL

}

vrrp_instance VI_1 {

state BACKUP

interface eth0

virtual_router_id 51

priority 80

advert_int 1

authentication {

    auth_type PASS

    auth_pass 1111

}

virtual_ipaddress {

    192.168.92.100

}

}

virtual_server 192.168.92.100 80 {

delay_loop 6

lb_algo wlc

lb_kind DR

nat_mask 255.255.255.0

persistence_timeout 50

protocol TCP


real_server 192.168.92.131 80 {

    weight 1

    TCP_CHECK {

        url {

        connect_timeout 3

        nb_get_retry 3

        delay_before_retry 3

    connect_port 80

    }

}

} 5). 关闭防火墙，启动ipvsadm,keepalived

[root@chen sbin]# service iptables stop

[root@chen sbin]# service ipvsadm restart

ipvsadm: Clearing the current IPVS table: [确定]

ipvsadm: Unloading modules: [确定]

ipvsadm: Clearing the current IPVS table: [确定]

ipvsadm: Applying IPVS configuration: [确定]

[root@chen sbin]# service keepalived restart

停止 keepalived： [确定]

正在启动 keepalived： [确定]

6). 查看状态

[root@chen sbin]# ip addr list

1: lo: <LOOPBACK , UP , LOWER_UP

mtu 65536 qdisc noqueue state UNKNOWN

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

inet 127.0.0.1/8 scope host lo

inet6 ::1/128 scope host 

   valid_lft forever preferred_lft forever

2: eth0: <BROADCAST , MULTICAST , UP , LOWER_UP

mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000

link/ether 00:0c:29:25:68:9f brd ff:ff:ff:ff:ff:ff

inet 192.168.92.130/24 brd 192.168.92.255 scope global eth0

inet 192.168.92.100/32 scope global eth0

inet6 fe80::20c:29ff:fe25:689f/64 scope link 

   valid_lft forever preferred_lft forever

[root@chen sbin]# ipvsadm -l -n

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port Forward Weight ActiveConn InActConn

TCP 192.168.92.100:80 wlc persistent 50

-> 192.168.92.131:80 Route 1 0 0
3. BackUp服务器的配置 1). 配置ip 192.168.92.130 2). 安装ipvsadm 3). 安装keepalived 4). 配置keepalived

[root@chen keepalived]# cat /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

router_id LVS_DEVEL

}

vrrp_instance VI_1 {

state BACKUP

interface eth0

virtual_router_id 51

priority 80

advert_int 1

authentication {

    auth_type PASS

    auth_pass 1111

}

virtual_ipaddress {

    192.168.92.100

}

}

virtual_server 192.168.92.100 80 {

delay_loop 6

lb_algo wlc

lb_kind DR

nat_mask 255.255.255.0

persistence_timeout 50

protocol TCP


real_server 192.168.92.131 80 {

    weight 1

    TCP_CHECK {

        url {

        connect_timeout 3

        nb_get_retry 3

        delay_before_retry 3

    connect_port 80

    }

}

} 5). 关闭防火墙，启动ipvsadm,keepalived

[root@chen sbin]# service iptables stop

[root@chen sbin]# service ipvsadm restart

ipvsadm: Clearing the current IPVS table: [确定]

ipvsadm: Unloading modules: [确定]

ipvsadm: Clearing the current IPVS table: [确定]

ipvsadm: Applying IPVS configuration: [确定]

[root@chen sbin]# service keepalived restart

停止 keepalived： [确定]

正在启动 keepalived： [确定] 6). 查看状态

[root@chen keepalived]# ipvsadm -l -n

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port Forward Weight ActiveConn InActConn

TCP 192.168.92.100:80 wlc persistent 50

-> 192.168.92.131:80 Route 1 0 0

[root@chen keepalived]# ip addr list

1: lo: <LOOPBACK , UP , LOWER_UP

mtu 65536 qdisc noqueue state UNKNOWN

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

inet 127.0.0.1/8 scope host lo

inet6 ::1/128 scope host 

   valid_lft forever preferred_lft forever

2: eth0: <BROADCAST , MULTICAST , UP , LOWER_UP

mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000

link/ether 00:0c:29:fb:8c:5c brd ff:ff:ff:ff:ff:ff

inet 192.168.92.128/24 brd 192.168.92.255 scope global eth0

inet6 fe80::20c:29ff:fefb:8c5c/64 scope link 

   valid_lft forever preferred_lft forever
  1. 测试 1). 客户端（192.168.92.1）浏览器输入 http://192.168.92.100/index.html 正常访问 2). 停止Master keepalived服务， service keepalived stop, 刷新浏览器还能正常访问 在BACKUP服务器会发现多了一个192.168.92.100的ip

[root@chen keepalived]# ip addr list

1: lo: <LOOPBACK , UP , LOWER_UP

mtu 65536 qdisc noqueue state UNKNOWN

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

inet 127.0.0.1/8 scope host lo

inet6 ::1/128 scope host 

   valid_lft forever preferred_lft forever

2: eth0: <BROADCAST , MULTICAST , UP , LOWER_UP

mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000

link/ether 00:0c:29:fb:8c:5c brd ff:ff:ff:ff:ff:ff

inet 192.168.92.128/24 brd 192.168.92.255 scope global eth0

inet 192.168.92.100/32 scope global eth0

inet6 fe80::20c:29ff:fefb:8c5c/64 scope link 

   valid_lft forever preferred_lft forever
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