N年前Nginx负载均衡在新浪播客中的应用

2008年的新浪播客由静态服务器集群和动态服务器集群两部分组成，静态服务器集群采用Squid做前端缓存，动态服务器也称接口服务器，主要用来实现显示播放数，记录播放日志等等。
接口服务器上采用F5 BIG-IP硬件四/七层负载均衡交换机，对4台Nginx反向代理服务器进行四层负载均衡，由这四台nginx服务器判断 URL，进行分组，对后端3组web服务器进行七层负载均衡。
F5 BIG-IP后端的3组web服务器，配置不一样，第一组内存密集型，技术主要是PHP+Mencache服务； 第2组为 CPU密集型服务，主要消耗CP资源；第三组为磁盘密集型，为记录日志等操作，要求大空间。
以下代码是接口服务器Nginx负载均衡配置;

<code><span>/***代码是N年前新浪接口服务器的nginx负载均衡配置，提供按URL分组服务,负载均衡服务***/</span>usr www www;
worker_processes <span>10</span>;
error_log /data1/logs/nginx_error.log crit;
pid   /tmp/nginx.pid
worker_rlimt_nofile <span>51200</span>;

events
{
    <span>use</span><span>epull</span>;

    worker_connections <span>51200</span>;
}

http
{
    <span>include</span>  conf/mine.types;
    default_type application/octet-stream;

    charset gb2312;

    server_name_hash_bucket_size <span>128</span>;

    keeplaive_timeout <span>15</span>;

    sendfile on;
    tcp_mopush on;
    tcp_nodelay on;
    <span>#第一组接口机：Memcache相关（点击数）</span>
    upstream count.<span>interface</span>.video.sian.com.cn{
        server xx.xx.xx<span>.55</span>:<span>80</span>;
        server xx.xx.xx<span>.58</span>:<span>80</span>;
        server xx.xx.xx<span>.47</span>:<span>80</span>;
    }
    <span>#第二组接口机：提供数据类程序</span>
    upstream data.<span>interface</span>.video.sian.com.cn{
        server xx.xx.xx<span>.59</span>:<span>80</span>;
        server xx.xx.xx<span>.64</span>:<span>80</span>;
        server xx.xx.xx<span>.48</span>:<span>80</span>;
    }
    <span>#第三组接口机：打日志类程序，功能相关，嵌套页面</span>
    upstream log.<span>interface</span>.video.sian.com.cn{
        server xx.xx.xx<span>.72</span>:<span>80</span>;
        server xx.xx.xx<span>.49</span>:<span>80</span>;
    }
}
server
{
    listen <span>80</span>;
    server_name <span><span>interface</span>.<span>video</span>.<span>sian</span>.<span>com</span>.<span>cn</span>;

    <span>location</span> / {</span>
    proxy_redirect off;

    <span>#后端的web服务器可以直接通过X-Forward-For 获取用户真实ip</span>
    proxy_set_header X-Forward-<span>For</span><span>$remote_adr</span>;

    <span>#按URL进行分组，第一组：Memcache相关（点击数）</span><span>if</span> (<span>$request_uri</span> ~ <span>"^\/app\/count\/"</span>)
    {
        proxy_pass http:<span>//count.interface.video.sian.com.cn;</span>
    }
    <span>if</span> (<span>$request_uri</span> ~ <span>"^\/app\/online\/"</span>)
    {
        proxy_pass http:<span>//count.interface.video.sian.com.cn;</span>
    }
    <span>if</span> (<span>$request_uri</span> ~ <span>"^\/interface\/user\/getLoginGap.php"</span>)
    {
        proxy_pass http:<span>//count.interface.video.sian.com.cn;</span>
    }
    <span>#按URL进行分组，第二组：外部提供数据类程序</span><span>if</span> (<span>$request_uri</span> ~ <span>"^\/crossdomain.xml"</span>)
    {
        proxy_pass http:<span>//data.interface.video.sian.com.cn;</span>
    }
    <span>if</span> (<span>$request_uri</span> ~ <span>"^\/interface\/client\/topVideoClient.php"</span>)
    {
        proxy_pass http:<span>//data.interface.video.sian.com.cn;</span>
    }
    <span>if</span> (<span>$request_uri</span> ~ <span>"^\/interface\/common\/"</span>)
    {
        proxy_pass http:<span>//data.interface.video.sian.com.cn;</span>
    }
    <span>if</span> (<span>$request_uri</span> ~ <span>"^\/interface\/randplay\/randplay.php"</span>)
    {
        proxy_pass http:<span>//data.interface.video.sian.com.cn;</span>
    }
    <span>if</span> (<span>$request_uri</span> ~ <span>"^\/interface\/topic\/suggTop.php"</span>)
    {
        proxy_pass http:<span>//data.interface.video.sian.com.cn;</span>
    }
    <span>if</span> (<span>$request_uri</span> ~ <span>"^\/interface\/uploadClient\/"</span>)
    {
        proxy_pass http:<span>//data.interface.video.sian.com.cn;</span>
    }
    <span>if</span> (<span>$request_uri</span> ~ <span>"^\/interface\/xml\/"</span>)
    {
        proxy_pass http:<span>//data.interface.video.sian.com.cn;</span>
    }
    <span>if</span> (<span>$request_uri</span> ~ <span>"^\/outinterface\/"</span>)
    {
        proxy_pass http:<span>//data.interface.video.sian.com.cn;</span>
    }
    <span>#按URL进行分组，第三组：打日志类程序</span><span>if</span> (<span>$request_uri</span> ~ <span>"^\/interface\/flash\/"</span>)
    {
        proxy_pass http:<span>//log.interface.video.sian.com.cn;</span>
    }
    <span>if</span> (<span>$request_uri</span> ~ <span>"^\/interface\/playrank\/playrank2008_10.php"</span>)
    {
        proxy_pass http:<span>//log.interface.video.sian.com.cn;</span>
    }
    <span>#按URL进行分组，其他组：功能相关，嵌套页面等未匹配到的URL</span>
    proxy_pass  http:<span>//log.interface.video.sina.com.cn;</span>
}
<span>#定义日至格式</span>
log_format count <span>'$remote_addr - $remote_user [$time_local] $request'</span><span>'"$status" $body_bytes_sent "$http_referer"'</span><span>'"$http_user_agent"   "$http_x_forwarded_for"'</span>;
<span>#打日志</span>
access_log /data1/logs/<span><span>interface</span>.<span>log</span><span>count</span>;

#允许客户端请求的最大单文件字节数
<span>client_max_body_size</span> 10<span>m</span>;

#缓冲区代理缓冲用户端的最大字节数 可以理解为现存到本地再传给用户
<span>client_body_size</span> 128<span>k</span>;

#跟后端服务器连接的超时时间<span>_</span>发起握手等候响应超时时间
<span>proxy_connect_time</span> 600;

#连接成功后<span>_</span>等待后端服务器响应时间<span>_</span>其实已经进入后端的派对等候处理
<span>proxy_read_timeout</span>  600;

#后端回传时间<span>_</span>规定时间内传完所有数据
<span>proxy_send_timeout</span>  600;

#代理请求缓存区，保存用户的头信息以供<span>Nginx</span>进行规则处理
<span>proxy_buffer_size</span>  8<span>k</span>;
<span>proxy_buffers</span>   4  32<span>k</span>;
<span>proxy_busy_buffers_size</span>  64<span>k</span>;
<span>proxy_temp_file_write_size</span> 64<span>k</span>;
}
}</span></code>

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