0. 下載并安裝
至 HAProxy 官網，最新穩定版本
$ wget http://www.haproxy.org/download/1.8/src/haproxy-1.8.9.tar.gz
$ tar -zxvf haproxy-1.8.9.tar.gz
$ make TARGET=linux2628 ARCH=x86_64 PREFIX=/usr/local/haproxy
$ sudo make install PREFIX=/usr/local/haproxy
參數說明
TARGET: 使用 uname -r 查看內核
- linux22 for Linux 2.2
- linux24 for Linux 2.4 and above (default)
- linux24e for Linux 2.4 with support for a working epoll (> 0.21)
- linux26 for Linux 2.6 and above
- linux2628 for Linux 2.6.28, 3.x, and above (enables splice and proxy)
$ uname -r
3.10.0-693.5.2.el7.x86_64
ARCH: ARCH=x86_64，系統位數
PREFIX: PREFIX=/usr/local/haprpxy，haprpxy安裝路徑
1. 基本配置
$ sudo mkdir -p /etc/haproxy
$ sudo touch /etc/haproxy/haproxy.cfg
global # 全局屬性
daemon # 以daemon方式在后臺運行
maxconn 256 # 最大同時256連接
pidfile /usr/local/haproxy/conf/haproxy.pid # 指定保存HAProxy進程號的文件
defaults # 默認參數
mode http # http模式
timeout connect 5000ms # 連接server端超時5s
timeout client 50000ms # 客戶端響應超時50s
timeout server 50000ms # server端響應超時50s
frontend http-in # 前端服務http-in
bind *:8080 # 監聽8080端口
default_backend nginx-server # 請求轉發至名為nginx-server的后端服務
backend nginx-server # 后端服務
server server1 127.0.0.1:80 maxconn 32 # nginx 80 端口服務，HAProxy同時最多向這個服務發起32個連接
2. 測試
$ /usr/local/haproxy/sbin/haproxy -f /etc/haproxy/haproxy.cfg
$ sudo systemctl start nginx
$ curl http://127.0.0.1:8080/
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
width: 35em;
margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a >nginx.org</a>.<br/>
Commercial support is available at
<a >nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
3. more
添加統計頁面
...
listen haproxy_stats # haproxy 統計頁面
bind *:8081
mode http
stats refresh 3s # 頁面刷新間隔
stats uri /haproxy-stats # uri
stats auth admin:admin # 授權賬戶
HAProxy 統計頁面
