Radware DNS全局配置.docx
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RadwareDNS全局配置
RadwareAppDirector
实现基于DNS重定向的全局负载均衡(多主站点)
2009年1月
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前言:
本配置实现了两个主站点互为备份的全局负载均衡(基于DNS重定向)
Loadbalancer:
AppDirector-1000ver:
1.03.04两台
Webserver:
Apache
Applicationserver:
Web
Database:
Oracle10
使用到的技术:
DNS重定向,Static/DynamicProximity(LRP/PRP),ClientNAT,Sessionpersistency,Advancedhealthmonitor
访问流程:
用户请求,域名解析最终由2台AD-global通过就近性(静态结合动态的方式)给出,即移动用户访问位于山西移动的节点,新联通用户访问位于山西新联通的节点。
此网站采用webhttpserver、bluecoatcache数据库实现。
拓扑图:
管理软件显示画面
配置过程:
移动AD-global:
1.ConfigurewebFarm
DNSredirectionFarm(ApacheFarm),pleasebenoticedthat“DistributionThreshold”shouldbe0.If“DistributionThreshold”notsetto“0”forexample“2500fordefault”,ADwillconsiderlocalserverfirstanddon’tuseproximity,whenlocalserverattacheduserreachto2500ADthendistributerequestto“distributedAppDirector”.
2.AddDistributedAppDirector(新联通Layer4policyip)
3.AddLocalserver
4.AddLayer4policyip
5.AddLRPreport
6.ConfigDNS
7.配置clientNAT
因为Cacheserver和AD在同一网段,需要配置clientNAT.
8.EnableClientNATforWebFarm.
8.AddcacheserverandenableClientNATonserver
10.Configureadvancedhealthcheck.
BecauseApacheneedforwardallrequesttoWeb,soifWebserverisdownthenApachemustberecognizedasdown.
Advancedhealthcheck:
11.ConfigureProximity实现两地用户访问
12.Tocheckserverattacheduser
Statistics:
13.Tocheckcookie/serverbind
新联通AD-global:
1.ConfigureApacheFarm
pleasebenoticedthat“DistributionThreshold”shouldbe0.If“DistributionThreshold”notsetto“0”forexample“2500fordefault”,ADwillconsiderlocalserverfirstanddon’tuseproximity,whenlocalserverattacheduserreachto2500ADthendistributerequestto“distributedAppDirector”.
2.AddDistributedAppDirector(移动Layer4policyip)
3.AddLocalserver
4.AddLayer4policyip
5.AddLRPreport
6.ConfigDNS
7.AddClientNAT
因为radware和cache在同一网段,需要配置clientNAT.Applicationserver(Webserver):
8.AddwebserverandenableClientNATonserver
9.Configureadvancedhealthcheck.
BecauseApacheneedforwardallrequesttoWeb,soifWebserverisdownthenApachemustberecognizedasdown.
Advancedhealthcheck:
11.ConfigureProximity实现南北用户访问
12.Tocheckserverattacheduser
13.Tocheckcookie/serverbind