Haproxy configuration file Description

################### #全局配置信息 ########################

###### #参数是进程级的, usually associated with the operating system (OS) #########

Global

Maxconn 20480 #默认最大连接数

Log 127.0.0.1 local3 #[err warning Info Debug]

Chroot/var/haproxy #chroot运行的路径

UID #所属运行的用户uid

GID #所属运行的用户组

Daemon #以后台形式运行haproxy

Nbproc 1 #进程数量 (multiple processes can be set to improve performance)

Pidfile/var/run/haproxy.pid #haproxy的pid存放路径, the user who initiates the process must have permission to access this file

Ulimit-n 65535 #ulimit的数量限制

#################### #默认的全局设置 ######################

# #这些参数可以被利用配置到frontend, Backend,listen component # #

Defaults

Log Global

Mode http #所处理的类别 (#7层 http;4 layer TCP)

Maxconn 20480 #最大连接数

Option Httplog #日志类别http日志格式

Option Httpclose #每次请求完毕后主动关闭http通道

Option Dontlognull #不记录健康检查的日志信息

Option Forwardfor #如果后端服务器需要获得客户端真实ip需要配置的参数, you can get the client IP from the HTTP header

Option Redispatch #serverId对应的服务器挂掉后, Force-directed to other healthy servers

Option Abortonclose #当服务器负载很高的时候 to automatically end the connection that the current queue is processing longer

Stats Refresh #统计页面刷新间隔

Retries 3 #3次连接失败就认为服务不可用, can also be set by the following

Balance Roundrobin #默认的负载均衡的方式, polling method

#balance source #默认的负载均衡的方式, Nginx-like Ip_hash

#balance leastconn #默认的负载均衡的方式, minimum connection

Contimeout #连接超时

Clitimeout 50000 #客户端超时

Srvtimeout 50000 #服务器超时

Timeout Check #心跳检测超时

################### #监控页面的设置 #######################

Listen Admin_status #Frontend和Backend的组合体, name of the monitoring group, custom name on demand

Bind 0.0.0.0:65532 #监听端口

Mode HTTP #http的7层模式

Log 127.0.0.1 Local3 Err #错误日志记录

Stats Refresh 5s #每隔5秒自动刷新监控页面

Stats Uri/admin?stats #监控页面的url

Stats Realm itnihao\ Itnihao #监控页面的提示信息

Stats auth admin:admin #监控页面的用户和密码admin, multiple user names can be set

Stats Auth Admin1:admin1 #监控页面的用户和密码admin1

Stats Hide-version #隐藏统计页面上的HAproxy版本信息

Stats Admin If TRUE #手工启用/disabled, backend server (haproxy-1.4.9 later version)

ErrorFile 403/etc/haproxy/errorfiles/403.http

ErrorFile 500/etc/haproxy/errorfiles/500.http

ErrorFile 502/etc/haproxy/errorfiles/502.http

ErrorFile 503/etc/haproxy/errorfiles/503.http

ErrorFile 504/etc/haproxy/errorfiles/504.http

################ #HAProxy的日志记录内容设置 ###################

Capture request Header Host Len 40

Capture Request Header Content-length Len 10

Capture Request Header Referer Len 200

Capture response header Server Len 40

Capture response header Content-length Len 10

Capture response header Cache-control Len 8

###################### #网站监测listen配置 #####################

########## #此用法主要是监控haproxy后端服务器的监控状态 ############

Listen Site_status

Bind 0.0.0.0:1081 #监听端口

Mode HTTP #http的7层模式

Log 127.0.0.1 Local3 err #[err warning Info Debug]

Monitor-uri/site_status #网站健康检测URL, used to detect haproxy management of the website can be used, normal return 200, abnormal return 503

ACL site_dead nbsrv (server_web) LT 2 #定义网站down时的策略当挂在负载均衡上的指定backend的中有效机器数小于1台时返回true

ACL site_dead nbsrv (server_blog) LT 2

ACL site_dead nbsrv (Server_bbs) LT 2

Monitor fail if Site_dead #当满足策略的时候返回503, the online documentation says 500, the actual test is 503

Monitor-net 192.168.16.2/32 #来自192.168.16.2 log information is not logged and forwarded

Monitor-net 192.168.16.3/32

####### #frontend配置 ############

# # # # #注意, frontend configuration can define multiple ACLs for matching operations ########

Frontend http_80_in

Bind 0.0.0.0:80 #监听端口, that is, Haproxy provides a port for Web services, similar to the VIP port of LVs

Mode HTTP #http的7层模式

Log Global #应用全局的日志配置

Option Httplog #启用http的log

Option Httpclose #每次请求完毕后主动关闭http通道, Ha-proxy does not support keep-alive mode

Option Forwardfor #如果后端服务器需要获得客户端的真实IP需要配置次参数, the client IP will be available from the HTTP header

####### #acl策略配置 #############

ACL Itnihao_web Hdr_reg (host)-I ^ (www.itnihao.cn|ww1.itnihao.cn) $

#如果请求的域名满足正则表达式中的2个域名返回true-I is ignoring case

ACL Itnihao_blog Hdr_dom (host)-I blog.itnihao.cn

#如果请求的域名满足www. itnihao.cn returns True-i is ignored case

#acl Itnihao HDR (host)-I itnihao.cn

#如果请求的域名满足itnihao. CN returns TRUE-I is ignored case

#acl file_req url_sub-i killall=

#在请求url中包含killall =, this control policy returns true, otherwise false

#acl dir_req url_dir-i Allow

#在请求url中存在allow作为部分地址路径, this control policy returns true, otherwise false is returned

#acl missing_cl hdr_cnt (content-length) EQ 0

#当请求的header中Content-length equals 0 o'clock returns True

####### #acl策略匹配相应 #############

#block if MISSING_CL

#当请求中header中Content-length equals 0 block request return 403

#block If!file_req | | Dir_req

#block表示阻止请求, returns a 403 error that currently indicates that the request is blocked if the policy file_req is not met or if the policy dir_req is satisfied

Use_backend Server_web If Itnihao_web

#当满足itnihao_web的策略时使用server_web的backend

Use_backend Server_blog If Itnihao_blog

#当满足itnihao_blog的策略时使用server_blog的backend

#redirect prefix http://blog.itniaho.cn code 301 if Itnihao

When #当访问itnihao. cn, use HTTP 301 to go to http://192.168.16.3

Default_backend Server_bbs

#以上都不满足的时候使用默认server_bbs的backend

######### #backend的设置 ##############

#下面我将设置三组服务器 Server_web,server_blog,server_bbs

################# #backend server_web####################

Backend Server_web

Mode HTTP #http的7层模式

Balance Roundrobin #负载均衡的方式, roundrobin average Way

Cookie ServerID #允许插入serverid到cookie中, ServerID can be defined later

Option Httpchk get/index.html #心跳检测的文件

Server Web1 192.168.16.2:80 Cookie web1 check Inter rise 3 Fall 3 weight 1

#服务器定义, the cookie 1 indicates that ServerID is Web1,check Inter 1500 is detecting the heartbeat frequency rise 3 is 3 times correctly thought the server is available,

#fall 3 is 3 failures that the server is unavailable, weight represents the weight

Server web2 192.168.16.3:80 Cookie web2 check Inter rise 3 Fall 3 weight 2

#服务器定义, the cookie 1 indicates that ServerID is Web2,check Inter 1500 is detecting the heartbeat frequency rise 3 is 3 times correctly thought the server is available,

#fall 3 is 3 failures that the server is unavailable, weight represents the weight

################## #backend server_blog######################

Backend Server_blog

Mode HTTP #http的7层模式

Balance Roundrobin #负载均衡的方式, roundrobin average Way

Cookie ServerID #允许插入serverid到cookie中, ServerID can be defined later

Option Httpchk get/index.html #心跳检测的文件

Server Blog1 192.168.16.2:80 Cookie blog1 check Inter rise 3 Fall 3 weight 1

#服务器定义, the cookie 1 indicates that ServerID is Blog1,check Inter 1500 is detecting heartbeat frequency rise 3 is 3 times correct think server is available, Fall 3 is 3 times failure considers server unavailable, weight represents weight

Server blog2 192.168.16.3:80 Cookie blog2 check Inter rise 3 Fall 3 weight 2

#服务器定义, the cookie 1 indicates that ServerID is Blog2,check Inter 1500 is detecting heartbeat frequency rise 3 is 3 times correct think server is available, Fall 3 is 3 times failure considers server unavailable, weight represents weight

################# #backend server_bbs########################

Backend Server_bbs

Mode HTTP #http的7层模式

Balance Roundrobin #负载均衡的方式, roundrobin average Way

Cookie ServerID #允许插入serverid到cookie中, ServerID can be defined later

Option Httpchk get/index.html #心跳检测的文件

Server BBS1 192.168.16.2:80 Cookie BBS1 check Inter rise 3 Fall 3 weight 1

#服务器定义, the cookie 1 indicates that ServerID is Bbs1,check Inter 1500 is detecting heartbeat frequency rise 3 is 3 times correct think server is available, Fall 3 is 3 times failure considers server unavailable, weight represents weight

Server BBS2 192.168.16.3:80 Cookie BBS2 check Inter rise 3 Fall 3 weight 2

#服务器定义, the cookie 1 indicates that ServerID is Bbs2,check Inter 1500 is detecting heartbeat frequency rise 3 is 3 times correct think server is available, Fall 3 is 3 times failure considers server unavailable, weight represents weight

This article is from the "My Ops Time" blog, so be sure to keep this source http://aaronsa.blog.51cto.com/5157083/1741518

Haproxy configuration file Description