对于任何已经部署的应用程序或网站,务必要实现负载均衡和高可用性,以便当主要基础设施出现故障时维持高流量和故障转移。
负载均衡器是一个主要部件,可确保高可用性,并且智能地将客户端请求路由到正确的服务器。它仅发送请求至联机的服务器,从而优化性能和容量利用率。
高可用性 (HA) 可确保当您的主负载均衡器出现故障时,服务器池可随时处理用户请求,而且您可以将该流量重定向到备用/次要负载均衡器,从而将停机时间降低到用户难以察觉的程度。
F5 负载均衡器可确保当服务器出现故障或负载过高时可以无缝地实现故障转移,将流量重定向至其他可以处理该负载的服务器。
HA 部署包括两个 BIG-IP(和其他负载均衡器类似)系统,这两个系统通过相同的配置进行同步。
通过该冗余配对的目的是当一个设备出现故障时,为用户提供不受中断的流畅服务。
如果活跃系统脱机或无法连接,备用系统会立即接管,以避免流量拥堵。通常而言,新的活跃系统将一直保持活跃,直到发生某个事件而需要再次激活第一个 BIG-IP 系统或您手动强制该系统进入备用状态。
当其中一个设备添加到传感器中作为 “addagentless” 时,传感器会自动检测 HA 对等节点配置。而且,在自动化期间,基于 F5 配置将证书同步到两个 HA 设备。因此,您无需添加两个 IP 作为单独的无代理。
在为自动化添加 F5 时,传感器支持以下配置:
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