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Haproxy 优化

时间:2015-06-26 01:40:49      阅读:140      评论:0      收藏:0      [点我收藏+]

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  1. Haproxy 自身健康检查
    vi /usr/local/haproxy/sbin/check_haproxy.sh
    技术分享
    #!/bin/sh
    PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/bin:/usr/local/sbin
                                
    [[ -e "/etc/rc.d/init.d/haproxy" ]] || exit 1
    [[ -z `ps aux | grep /usr/sbin/haproxy | grep -v grep` ]] && service haproxy start && exit 1
                                
    ETH1_ADDR=`/sbin/ifconfig eth0 | awk -F : /inet addr/{print $2} | sed s/[a-zA-Z ]//g`
    [[ -z `curl -I -s "http://${ETH1_ADDR}" | grep "200 OK"` ]] && service haproxy restart
    check harpy Code

    chmox +x /usr/local/haproxy/sbin/check_haproxy.sh
    设置定时检查任务
    crontab -e
    */5 * * * * /usr/local/haproxy/sbin/check_haproxy.sh >/dev/null 2>&1
    备注:若无法运行,请根据haproxy安装路径和绑定的网卡对代码做简单修改

  2. 进阶配置
    mode http
    # 设置为http模式
    balance source
    # 设置haproxy的调度算法为源地址hash
    cookie SERVERID
    # 允许向cookie插入SERVERID,每台服务器的SERVERID可在下面使用cookie关键字定义
    option httpchk GET /test/index.php
    # 开启对后端服务器的健康检测,通过GET /test/index.php来判断后端服务器的健康情况
    server php_server_1 10.12.25.68:80 cookie 1 check inter 2000 rise 3 fall 3 weight 2
    server php_server_2 10.12.25.72:80 cookie 2 check inter 2000 rise 3 fall 3 weight 1
    server php_server_bak 10.12.25.79:80 cookie 3 check inter 1500 rise 3 fall 3 backup
    # server语法:server [:port] [param*]
    # 使用server关键字来设置后端服务器;为后端服务器所设置的内部名称[php_server_1],该名称将会呈现在日志或警报中、后端服务器的IP地址
    # 支持端口映射[10.12.25.68:80]、指定该服务器的SERVERID为1[cookie 1]
    # 接受健康监测[check]、监测的间隔时长,单位毫秒[inter 2000]
    # 监测正常多少次后被认为后端服务器是可用的[rise 3]
    # 监测失败多少次后被认为后端服务器是不可用的[fall 3]
    # 分发的权重[weight 2]、最后为备份用的后端服务器,当正常的服务器全部都宕机后,才会启用备份服务器[backup]

  3. 优化网络
    vim /etc/sysctl.conf
    net.ipv4.tcp_syncookies = 1
    net.ipv4.tcp_tw_reuse = 1
    net.ipv4.tcp_tw_recycle = 1
    net.ipv4.tcp_fin_timeout = 30
    net.ipv4.tcp_keepalive_time = 1200
                                     
    net.ipv4.ip_local_port_range = 1024 65000
    net.ipv4.tcp_max_syn_backlog = 8192
    net.ipv4.tcp_max_tw_buckets = 80000
                                     
    net.core.somaxconn = 32768
                                     
    net.ipv4.tcp_keepalive_probes = 5
    net.ipv4.tcp_keepalive_intvl = 20
                                     
    net.core.wmem_default = 8388608
    net.core.rmem_default = 8388608
    net.core.rmem_max = 16777216
    net.core.wmem_max = 16777216
                                     
    net.ipv4.tcp_rmem = 4096 87380 16777216
    net.ipv4.tcp_wmem = 4096 65536 16777216
                                     
    net.core.netdev_max_backlog = 32768
                                     
    net.ipv4.tcp_timestamps = 0
    net.ipv4.tcp_synack_retries = 2
    net.ipv4.tcp_syn_retries = 2
    net.ipv4.tcp_retries2 = 5
                                     
    net.ipv4.tcp_mem = 41943040 73400320 94371840
    net.ipv4.tcp_max_orphans = 3276800
    fs.file-max = 1300000

    sysctl -p 

  4. 参考文档
    http://sofar.blog.51cto.com/353572/1291013/
    http://leejia.blog.51cto.com/4356849/1421882

Haproxy 优化

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原文地址:http://www.cnblogs.com/Mrhuangrui/p/4601294.html

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