HAProxy负载均衡保持客户端和服务器Session亲缘性的三种方式

1 用户IP 识别

haroxy 将用户IP经过hash计算后 指定到固定的真实服务器上（类似于nginx 的IP hash 指令）

配置指令 balance source



2 cookie 识别

haproxy 将WEB服务端发送给客户端的cookie中插入(或添加加前缀)haproxy定义的后端的服务器COOKIE ID。

配置指令例举 cookie SESSION_COOKIE insert indirect nocache

用firebug可以观察到用户的请求头的cookie里 有类似" Cookie jsessionid=0bc588656ca05ecf7588c65f9be214f5; SESSION_COOKIE=app1" SESSION_COOKIE=app1就是haproxy添加的内容



3 session 识别

haproxy 将后端服务器产生的session和后端服务器标识存在haproxy中的一张表里。客户端请求时先查询这张表。

配置指令例举 appsession JSESSIONID len 64 timeout 5h request-learn



#haproxy -f haproxy.cfg -V

#haproxy.cfg



global

log 127.0.0.1 local0 info

maxconn 4096

user haproxy

group haproxy

daemon

nbproc 1

pidfile /var/run/haproxy.pid

defaults

mode http

maxconn 2000

contimeout 5000

clitimeout 30000

srvtimeout 30000

option httplog

option redispatch

option abortonclose

retries 3

listen admin_stats

bind 113.106.185.245:443

mode http

log 127.0.0.1 local0 err

stats uri /qhappy_stats

stats realm itindex.net\ Qhappy

stats auth qhappy:qhappy

stats refresh 5s

listen site_status

bind 113.106.185.245:445

mode http

log 127.0.0.1 local0 err

monitor-uri /site_status

frontend WEB_SITE

bind 0.0.0.0:8080

mode http

log global

option httplog

option httpclose

option forwardfor

acl COOKIE hdr_reg(host) -i ^(cookie.itindex.net)

acl SOURCE hdr_reg(host) -i ^(sourceip. itindex .net)

acl APPSESSION hdr_reg(host) -i ^(appsession. itindex .net)

acl NOSESSION hdr_reg(host) -i ^(nosession. itindex .net)

use_backend COOKIE_srv if COOKIE

use_backend SOURCE_srv if SOURCE

use_backend APPSESSION_srv if APPSESSION

use_backend NOSESSION_srv if NOSESSION

# default_backend ai_server

backend COOKIE_srv

mode http

cookie SESSION_COOKIE insert indirect nocache

server REALsrv_70 184.82.239.70:80 cookie 11 check inter 1500 rise 3 fall 3 weight 1

server REALsrv_120 220.162.237.120:80 cookie 12 check inter 1500 rise 3 fall 3 weight 1

backend SOURCE_srv

mode http

balance source

server REALsrv_70 184.82.239.70:80 cookie 11 check inter 1500 rise 3 fall 3 weight 1

server REALsrv_120 220.162.237.120:80 cookie 12 check inter 1500 rise 3 fall 3 weight 1

backend APPSESSION_srv

mode http

appsession JSESSIONID len 64 timeout 5h request-learn

server REALsrv_70 184.82.239.70:80 cookie 11 check inter 1500 rise 3 fall 3 weight 1

server REALsrv_120 220.162.237.120:80 cookie 12 check inter 1500 rise 3 fall 3 weight 1



backend NOSESSION_srv

mode http

balance roundrobin

server REALsrv_70 184.82.239.70:80 cookie 11 check inter 1500 rise 3 fall 3 weight 1

server REALsrv_120 220.162.237.120:80 cookie 12 check inter 1500 rise 3 fall 3 weight 1

backend ai_server

mode http

balance roundrobin

cookie SERVERID

server REALsrv_70 184.82.239.70:80 cookie 2 check inter 1500 rise 3 fall 3 weight 1

server REALsrv_120 220.162.237.120:80 cookie 1 check inter 1500 rise 3 fall 3 weight 1



#Cookie



listen appli1-rewrite 0.0.0.0:80

mode http

option httplog

option dontlognull

option httpclose

option forwardfor



cookie SESSION_COOKIE insert indirect nocache



#balance roundrobin

server app1_1 172.20.37.249:8080 cookie app1inst1 check inter 2000 rise 2 fall 5

server app1_2 172.20.12.145:80 cookie app1inst2 check inter 2000 rise 2 fall 5

#IP



listen appli1 0.0.0.0:90

mode http

option httplog

option dontlognull

log 127.0.0.1 local3

cookie JSESSIONID rewrite

balance source

option httpchk GET /payCardSys/login.jsp

stats uri /stats

stats auth admin:admin

server app1_1 10.112.56.66:6601 cookie app1inst1 check inter 2000 rise 2 fall 5

server app1_2 10.112.56.67:6702 cookie app1inst2 check inter 2000 rise 2 fall 5

转载地址：http://itindex.net/blog/2012/07/24/1343118758531.html