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    varnish3.0安装及配置教程

    在内网的vps上安装Varnish的最新版3.0来用做测试
    Varnish有centos下的rpm和ubuntu下的deb二进制包下载,但我选择的是源码编译安装
    先下载 varnish-3.0.0_jb51.rar
    yum install gcc
    yum install gcc-c++ libstdc++-devel
    yum install -y httpd-devel pcre perl pcre-devel zlib zlib-devel GeoIP GeoIP-devel
    Varnish需要pcre支持,如果服务器没有安装pcre-devel会提示需要指定prce目录。
    Centos服务器上使用yum install pcre-devel安装
    解压varnish进行编译安装
    cd varnish-3.0.0
    ./autogen.sh
    ./configure --prefix=/usr/local/varnish PKG_CONFIG_PATH=/usr/lib/pkgconfig
    make
    make install
    安装成功后,安装的目录是
    cd /usr/local/varnish/sbin
    ./varnishd -V
    查看版本,看是否安装成功
    测试varnish
    先编辑配置文件
    vi /usr/local/varnish/etc/varnish/default.vcl

    复制代码
    代码如下:

    # This is a basic VCL configuration file for varnish. See the vcl(7)
    # man page for details on VCL syntax and semantics.
    #
    # Default backend definition. Set this to point to your content
    # server.
    #
    backend default {
    .host = "192.168.88.156";
    .port = "80";
    ###下面三行为新加配
    .connect_timeout = 1s;
    .first_byte_timeout = 5s;
    .between_bytes_timeout = 2s;
    }
    #
    # Below is a commented-out copy of the default VCL logic. If you
    # redefine any of these subroutines, the built-in logic will be
    # appended to your code.
    sub vcl_recv {
    if (req.restarts == 0) {
    if (req.http.x-forwarded-for) {
    set req.http.X-Forwarded-For =
    req.http.X-Forwarded-For + ", " + client.ip;
    } else {
    set req.http.X-Forwarded-For = client.ip;
    }
    }
    if (req.request != "GET"
    req.request != "HEAD"
    req.request != "PUT"
    req.request != "POST"
    req.request != "TRACE"
    req.request != "OPTIONS"
    req.request != "DELETE") {
    /* Non-RFC2616 or CONNECT which is weird. */
    return (pipe);
    }
    if (req.request != "GET" req.request != "HEAD") {
    /* We only deal with GET and HEAD by default */
    return (pass);
    }
    if (req.http.Authorization || req.http.Cookie) {
    /* Not cacheable by default */
    return (pass);
    }
    return (lookup);
    }
    #
    sub vcl_pipe {
    # # Note that only the first request to the backend will have
    # # X-Forwarded-For set. If you use X-Forwarded-For and want to
    # # have it set for all requests, make sure to have:
    # # set bereq.http.connection = "close";
    # # here. It is not set by default as it might break some broken web
    # # applications, like IIS with NTLM authentication.
    return (pipe);
    }
    #
    sub vcl_pass {
    return (pass);
    }
    #
    sub vcl_hash {
    hash_data(req.url);
    if (req.http.host) {
    hash_data(req.http.host);
    } else {
    hash_data(server.ip);
    }
    return (hash);
    }
    #
    sub vcl_hit {
    return (deliver);
    }
    #
    sub vcl_miss {
    return (fetch);
    }
    #
    sub vcl_fetch {
    if (beresp.ttl = 0s ||
    beresp.http.Set-Cookie ||
    beresp.http.Vary == "*") {
    /*
    * Mark as "Hit-For-Pass" for the next 2 minutes
    */
    set beresp.ttl = 120 s;
    return (hit_for_pass);
    }
    return (deliver);
    }
    #
    sub vcl_deliver {
    return (deliver);
    }
    #
    # sub vcl_error {
    # set obj.http.Content-Type = "text/html; charset=utf-8";
    # set obj.http.Retry-After = "5";
    # synthetic {"
    # ?xml version="1.0" encoding="utf-8"?>
    # !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
    # "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
    # html>
    # head>
    # title>"} + obj.status + " " + obj.response + {"/title>
    # /head>
    # body>
    # h1>Error "} + obj.status + " " + obj.response + {"/h1>
    # p>"} + obj.response + {"/p>
    # h3>Guru Meditation:/h3>
    # p>XID: "} + req.xid + {"/p>
    # hr>
    # p>Varnish cache server/p>
    # /body>
    # /html>
    # "};
    # return (deliver);
    # }
    #
    sub vcl_init {
    return (ok);
    }
    #
    sub vcl_fini {
    return (ok);
    }

    /usr/local/varnish/sbin/varnishd -f /usr/local/varnish/etc/varnish/default.vcl -s malloc,1024m -T 127.0.0.1:200 -a 0.0.0.0:80
    现在可以打开varnish了
    http://192.168.88.1/ (开启varnish的端口号)
    戴图显示,nginx 为177上运行的web服务器,出现了varnish字样,表示缓存架设成功,已正常工作了。
     
    启动varnishncsa用来将Varnish访问日志写入日志文件:

    复制代码
    代码如下:

    /usr/local/varnish/bin/varnishncsa -n /var/vcache -w /var/logs/varnish.log

    配置开机自动启动Varnish

    复制代码
    代码如下:

    vi /etc/rc.local

    在末尾增加以下内容
    引用
    ulimit -SHn 51200
    /usr/local/varnish/sbin/varnishd -n /var/vcache -f /usr/local/varnish/vcl.conf -a 0.0.0.0:80 -s file,/var/vcache/varnish_cache.data,1G -g www -u www -w 30000,51200,10 -T 127.0.0.1:3500 -p client_http11=on
    /usr/local/varnish/bin/varnishncsa -n /var/vcache -w /var/logs/youvideo.log
    优化Linux内核参数

    复制代码
    代码如下:

    vi /etc/sysctl.conf

    在末尾增加以下内容
    引用
    net.ipv4.tcp_fin_timeout = 30
    net.ipv4.tcp_keepalive_time = 300
    net.ipv4.tcp_syncookies = 1
    net.ipv4.tcp_tw_reuse = 1
    net.ipv4.tcp_tw_recycle = 1
    net.ipv4.ip_local_port_range = 5000 65000
    查看Varnish服务器连接数与命中率
    /usr/local/varnish/bin/varnishstat
    配置启动脚本
    mkdir /cache/varnish/V -p
    vi /usr/local/varnish/sbin/start.sh
    #!/bin/sh
    #file:start.sh
    date -u
    /usr/local/varnish/sbin/varnishd -a 0.0.0.0:80 -s file,/cache/varnish/V,1024m -f /usr/local/varnish/etc/varnish/default.vcl -p thread_pool_max=1500 -p thread_pools=5 -p listen_depth=512
    chmod 777 start.sh
    运行
    /usr/local/varnish/sbin/start.sh
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