DNS服务器LVS方式负载均衡部署与测试

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DNS服务器LVS方式负载均衡部署与测试测试环境:

本测试方案采用LVS(DR)+Keepalived部署高可用的DNS服务集群。

主机IP划分:

Master-LB:192.168.100.70

Backup-LB:192.168.100.30

RS1:192.168.100.40

RS2:192.168.100.60

Clinet:192.168.100.200

拓扑图:

LB-2:192.168.100.30Backup LB-1:192.168.100.70

Master DNS-RS1:192.168.100.40

DNS-RS2:192.168.100.60

1、配置Maste-LB 服务器:

1、 安装ipvsadm ;

yum install ipvsadm* -y

2、 安装keepalived

yum install keepalived -y

3、 配置配置keepalived

#cat /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

notification_email {

****************

}

**************************************************** smtp_server 127.0.0.1

smtp_connect_timeout 30

router_id LVS_1

}

vrrp_instance VI_1 {

state MASTER

interface eth1

virtual_router_id 50

priority 100

advert_int 1

authentication {

auth_type PASS

auth_pass 1111

}

virtual_ipaddress {

192.168.100.100

}

}

virtual_server 192.168.100.100 53 {

delay_loop 1

lb_algo rr

lb_kind DR

nat_mask 255.255.255.255

!persistence_timeout 50

protocol UDP

real_server 192.168.100.40 53 {

weight 1

MISC_CHECK {

misc_path "/usr/bin/dig -************************************.100.40+time=1+tries=5+fail>/dev/null"

misc_timeout 6

}

}

real_server 192.168.100.60 53 {

weight 1

MISC_CHECK {

misc_path "/usr/bin/dig -************************************.100.60+time=1+tries=5+fail>/dev/null"

misc_timeout 6

}

}

}

vrrp_instance VI_2 {

state MASTER

interface eth1

virtual_router_id 52

priority 100

advert_int 1

authentication {

auth_type PASS

auth_pass 1111

}

virtual_ipaddress {

192.168.100.100

}

}

virtual_server 192.168.100.100 53 { delay_loop 1

lb_algo rr

lb_kind DR

nat_mask 255.255.255.255

!persistence_timeout 50

protocol TCP

real_server 192.168.100.40 53 {

weight 1

TCP_CHECK {

connect_timeout 5

nb_get_retry 3

connect_port 53

}

}

real_server 192.168.100.60 53 {

weight 1

TCP_CHECK {

connect_timeout 5

nb_get_retry 3

connect_port 53

}

}

}

4、启动keepalived的服务

service keepalived restart

5、查看配置是否生效

# ipvsadm –Ln

[root@localhost ~]# ipvsadm -Ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 192.168.100.100:53 rr

-> 192.168.100.40:53 Route 1 0 0

-> 192.168.100.60:53 Route 1 0 0

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