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AppDirector Training1.06.09-1.07.11- Part II 高级健康检查 高级健康检查－Health Monitor模块 高可用性-健康检查－多重组合检查 实验五 健康检查模块 实验五 实验五 如图所示，建立1个Farm，分别包含图示两台服务器，定义VIP Farm1：健康检查-NoCheck，端口-any，轮询，EntryPerSession 健康检查模块实验1 每台服务器配置两种健康检查方式： Ping TCP port 80； 检查绑定 配置完成后验证组合效果 健康检查模块实验2 每台服务器配置两种健康检查方式： TCP port 80； HTTP网页：检查网页内容是否有“internet”字符串 检查绑定 配置完成后验证组合效果 L7 对话保持 对话保持方式 L3 Client IP based persistency Regular Session Mode L4 Client IP and port Entry Per Session Server Per Session Dispatch Method is Hashing L7 Delay binding is needed Cookie persistence SSL ID HTTP Session ID: Static ID Dynamic ID Cookie Insert Session ID Persistence HTTP Cookies A cookie is a small piece of information that is sent by a web server and stored on a web client browser so it can later be read back from that client. Cookie information can be used to associate session state information with a specific user. Cookies are transmitted in the HTTP header from the server in the form: Set-Cookie:NAME=VALUE;expires=DATE;path=PATH; domain=DOMAIN_NAME Cookies have size limitations Up to 300 cookies per client from all sources Size of each cookie can be up to 4K 20 cookies per server or domain per session Cookies Example Cookies Example (Cont.) Cookies Example (Cont.) Text Match Session ID Persistency Session ID Persistency Table Cookies Insert Rewrite Insert / Rewrite Cookie The need: Maintain HTTP session persistency based on cookies without any change on servers Solution: AppDirector is able to add its own cookies to server replies The following client requests include that cookie, AppDirector uses it to maintain server persistency Cookies Insert Cookies Insert (Cont.) Cookies Insert (Cont.) Cookies Insert (Cont.) 实验六 Cookie插入 实验六 实验六 如图所示，建立1个Farm，分别包含图示两台服务器，定义VIP Farm1：健康检查-NoCheck，端口-any，轮询，ServerPerSession 验证相同IP不同源端口被分配到不同服务器 OMPC pattern对话保持演示 Cookie插入对话保持实验 选择Cookie插入 观察Client table 观察Dynamic session ID table L7 策略 Layer 7 Policy AppDirector load balances traffic based on layer 7 information using t