Ubutun 安裝

#ubuntu 14.04LTS 
add-apt-repository ppa:vbernat/haproxy-1.7
apt-get update
apt-get dist-upgrade
apt-get install haproxy

mac 安裝

brew install haproxy
#運(yùn)行 `haproxy -f  /usr/local/Cellar/haproxy/1.6.6/haproxy.cfg  -d`

配置文件

global
    log 127.0.0.1 local0 notice
    maxconn 2000
    user haproxy
    group haproxy

defaults
    log     global
    mode    http
    option  httplog
    option  dontlognull
    retries 3
    option redispatch
    timeout connect  5000
    timeout client  10000

frontend localnodes
    bind *:4000
    mode tcp
    default_backend nodes
    timeout client          1m

backend nodes
    mode tcp
    balance leastconn
    server web01 127.0.0.1:4001 check
    server web02 127.0.0.1:4002 check
    timeout connect        10s
    timeout server          1m

• check 表示 haproxy 會(huì)對(duì)后臺(tái)的 server 做健康檢查，一旦發(fā)現(xiàn)離線就不往這個(gè)節(jié)點(diǎn)發(fā)信息了
• balance leastconn 表示負(fù)載策略是 最小連接數(shù)
• 參考 How To Use HAProxy to Set Up HTTP Load Balancing on an Ubuntu VPS
• maxconn 的默認(rèn)值是2000

• timeout client  10000 指的是如果 10000ms 以?xún)?nèi)沒(méi)有進(jìn)行通訊，tcp 連接將重置