Haproxy配置样例

haproxy.cfg

# Haproxy的常见配置
# 参考文档：
# http://cbonte.github.io/haproxy-dconv/1.9/configuration.html
# http://blog.sina.com.cn/s/blog_704836f40102w243.html
# http://thread.gmane.org/gmane.comp.web.haproxy/12557
# https://serverfault.com/questions/678882/is-there-a-way-to-rate-limit-connections-with-haproxy-using-
# https://blog.codecentric.de/en/2014/12/haproxy-http-header-rate-limiting/
# http://cbonte.github.io/haproxy-dconv/1.9/management.html
# https://www.haproxy.com/blog/websockets-load-balancing-with-haproxy/

global
  daemon
  maxconn 20000
  stats   socket /var/run/haproxy/haproxy.sock mode 0600 level admin
  log     127.0.0.1   local3

defaults
  mode     http
  
  # 启动Haproxy web统计页面
  stats    uri        /haproxy-admin
  stats    realm      Haproxy\ Statistics
  stats    auth       用户名:密码

  # 添加X-Forwarded-For头，使后端获得真实IP
  option   forwardfor except 127.0.0.1
  
  # 开启http keep-alive
  option   http-keep-alive
  
  # http keep-alive保持5秒
  timeout  http-keep-alive 5s
  
  # 开启日志
  log      127.0.0.1  local3

frontend http-in
  
  # 绑定80端口
  bind    *:80
  
  # 最大连接数
  maxconn 20000
  
  # 客户端响应超时
  timeout client 5s
  # http请求送达超时
  timeout http-request 5s
  # http keep-alive保持连接最长时间
  timeout http-keep-alive 5s
  # half-open connection未响应超时，针对web socket
  timeout client-fin 30s
  
  # 使用后端服务器组
  default_backend servers
  
  # START 过速请求的防御
  
  # 创建stick-table，记录 cookie(SESSIONID) -> 最近30秒内http请求次数
  # stick-table type string len 50 size 1m expire 10m store http_req_rate(30s)
  
  # 将cookie(SESSION)作为key，存到stick-table中
  # http-request track-sc0 req.cook(SESSION)
  
  # 定义ACL，请求次数是否超过100
  # acl abuse sc0_http_req_rate gt 100
  
  # 如果ACL为true，则拒绝http请求，响应429
  # http-request deny deny_status 429 if abuse
  
  # END
  
  # START IP 黑名单
  
  # 定义ACL，看client ip是否在ip-blacklist.txt内，文件内容如下：
  # xxx.xxx.xxx.xxx
  # xxx.xxx.xxx.xxx/8
  # acl block_ip src -f path/to/ip-blacklist.txt
  
  # 如果ACL为true，则拒绝http请求
  # http-request deny if block_ip
  
  # END
  
  # START User-Agent黑名单
  
  # 定义ACL，看user-agent头是否字符串substring在ua-blacklist.txt内，文件内容如下：
  # okhttp
  # chrome
  # acl block_ua hdr_sub(user-agent) -i -f path/to/ua-blacklist.txt
  
  # 如果ACL为true，则拒绝http请求
  # http-request deny if block_ua
  
  # END
  
backend servers
  # 连接到服务器超时
  timeout connect 30s
  # 服务器无活动超时
  timeout server  60s
  # tunnel超时，针对web socket
  timeout tunnel  1h

  # START 负载策略：轮询，session持久策略：cookie，这个策略最均匀
  balance roundrobin
  cookie SERVERNAME insert indirect nocache
  # END
  
  # START 负载策略：轮询，session持久策略：ip
  # balance roundrobin
  # stick-table type ip size 10m expire 3h
  # stick on src
  # END
  
  # START 负载策略：IP hash
  # balance source
  # END
  
  # xxx代表服务地址（可带端口号）
  # server1,2,3,4只是名字，可以改成需要的名字
  # check port yyyy 代表通过检测后端服务器的yyyy端口来判断服务器是否可用，如果不可用，会自动切换
  server server1 xxx check port yyyy maxconn 1000 maxqueue 10 slowstart 60s
  server server2 xxx check port yyyy maxconn 1000 maxqueue 10 slowstart 60s
  server server3 xxx check port yyyy maxconn 1000 maxqueue 10 slowstart 60s
  server server4 xxx check port yyyy maxconn 1000 maxqueue 10 slowstart 60s