负载均衡开源解决方案

1、第4-7层，第4-7层交换机，计划，基本硬件/GUI/配置方法/高可用性then echo new instance successfully loaded，Stopping previous one . kill-us R1 $(cat/var/run/ha proxy . PID . old) 成员(server=333336980)、成员(server=336080)、成员(server=10 . 1 . 1336080) )、基于端口的traffic direction、IP addr-based traffic direction、incoming r

2、equest、Monitor availability requirement listen web farm 192 . 168 . 1 . 1:8 mode http balance round robin cookie serverid insert indirect option http chk head/index . html http/1.0 server listen web farm 192 . 168 . 1 . 1:8 mode http balance round robin cookie serverid insert indirect option http ch

3、k head/index . html http/1.0 server .503 service unavailable no server is available to handle this request。Load balancing algorithm、round robin WRR (ratio (member)、ratio(node)dynamic ratio:根据对伺服器效能的观测值加权fastest(node)fastest(application):服务器/应用程序的最快响应时间LC(member)LC(node)observed(member)observed cooki

4、e Persistence 1.1 http cookie Insert 1.2 http cookie rewrite 1.3 http cookie passive 1.4 cookie hash destination address affinity Persistence hash Persistence MSR DP Persistence listen web farm 192 . 168 . 1 . 1:8 mode http balance round robin cookie serverid insert indirect option http chk head/ind

5、ex . html http/1.0 server back end private # Connect to the servers using our 192 . 168 . 1 . 200 source address source 192 . 168 . 1 . 200 back end transparent _ SSL 1 # coor attack(syn flood)connection limit time out surge queue slow start，Listen app farm 192 . 168 . 1 . 1:8 mode http max conn 10000 option req _ lenwait _ endreq _ SSL _ ver、layer 4和below、layer 4 content、method req _ verspath _ * URL _ meth _ options | | meth _