Nginx-Serie (Dreizehn Nginx-Lastausgleich)

WBOY
Freigeben: 2016-08-08 09:24:09
Original
1118 Leute haben es durchsucht

一.负载均衡配置

<code><span># 负载均衡</span><span>upstream</span> webserver {
    <span>server</span><span>192.168.27.134:8080</span>;
    <span>server</span><span>192.168.27.135:80</span>;
    <span>server</span><span>192.168.27.136:80</span>;
}

<span># 反向代理</span><span>server</span> { 
    <span>listen</span><span>80</span>;
    <span>server_name</span> www.test01.com;

    <span>location</span> / {
        <span>proxy_pass</span><span>http://webserver</span>;
        <span>proxy_redirect</span><span>off</span>;
        <span>proxy_set_header</span> Host <span>$host</span>;
        <span>proxy_set_header</span> X-Real-IP <span>$remote_addr</span>;
        <span>proxy_set_header</span> X-Forwarded-For <span>$proxy_add_x_forwarded_for</span>;
    }
}

<span># web服务器</span><span>server</span> {
    <span>listen</span><span>8080</span>;
    <span>server_name</span>  www.test01.com;
    <span>access_log</span>  logs/host.access.log  main;

    <span>location</span> / {
        <span>root</span>   /web/www/thinkphp;
        <span>index</span>  index.php index.html index.htm;

        <span>if</span> (!-e <span>$request_filename</span>) {
            <span>rewrite</span><span> ^/(.*)$</span> /index.php/<span>$1</span><span>last</span>;
        }
    }

    <span>location</span><span>~ [^/]\.php(/|$)</span> {
        <span>root</span> /web/www/thinkphp;
        <span>fastcgi_index</span> index.php;
        <span>fastcgi_pass</span><span>127.0.0.1:9000</span>;
        <span>include</span>      fastcgi_params;

        <span>fastcgi_split_path_info</span><span> ^(.+?\.php)(/.*)$</span>;
        <span>fastcgi_param</span> SCRIPT_FILENAME <span>$document_root</span><span>$fastcgi_script_name</span>;
        <span>fastcgi_param</span> SCRIPT_NAME <span>$fastcgi_script_name</span>;
        <span>fastcgi_param</span> PATH_INFO <span>$fastcgi_path_info</span>;
        <span>fastcgi_param</span> PATH_TRANSLATED <span>$document_root</span><span>$fastcgi_path_info</span>;
    }
}</code>
Nach dem Login kopieren

二. 负载均衡算法

1.轮询 (默认)

<code>upstream webserver {
    <span>server</span><span>192.168</span><span>.27</span><span>.134</span>:<span>8080</span>;
    <span>server</span><span>192.168</span><span>.27</span><span>.135</span>:<span>80</span>;
    <span>server</span><span>192.168</span><span>.27</span><span>.136</span>:<span>80</span>;
}</code>
Nach dem Login kopieren

2.weight

<code>upstream webserver {
    <span>server</span><span>192.168</span><span>.27</span><span>.134</span>:<span>8080</span> weight=<span>1</span>;
    <span>server</span><span>192.168</span><span>.27</span><span>.135</span>:<span>80</span> weight=<span>2</span>;
    <span>server</span><span>192.168</span><span>.27</span><span>.136</span>:<span>80</span> weight=<span>2</span>;
}</code>
Nach dem Login kopieren

3.ip_hash ( 解决session共享问题)

<code>upstream webserver {
    ip_hash;
    <span>server</span><span>192.168</span><span>.27</span><span>.134</span>:<span>8080</span>;
    <span>server</span><span>192.168</span><span>.27</span><span>.135</span>:<span>80</span>;
    <span>server</span><span>192.168</span><span>.27</span><span>.136</span>:<span>80</span>;
}</code>
Nach dem Login kopieren

4.fair 按后端服务器的响应时间来分配请求,响应时间短的优先分配。(第三方)

<code>upstream webserver {
    <span>server</span><span>192.168</span><span>.27</span><span>.134</span>:<span>8080</span>;
    <span>server</span><span>192.168</span><span>.27</span><span>.135</span>:<span>80</span>;
    <span>server</span><span>192.168</span><span>.27</span><span>.136</span>:<span>80</span>;
    fair;
}</code>
Nach dem Login kopieren

参考:http://wiki.nginx.org/HttpUpstreamFairModule

5.url_hash 按访问url的hash结果来分配请求,使每个url定向到同一个后端服务器,后端服务器为缓存时比较有效。(第三方)

<code><span>upstream</span> webserver {
    <span>server</span><span>192.168.27.134:8080</span>;
    <span>server</span><span>192.168.27.135:80</span>;
    <span>server</span><span>192.168.27.136:80</span>;
    <span>hash</span><span>$request_uri</span>;
}</code>
Nach dem Login kopieren

参考:http://wiki.nginx.org/HttpUpstreamRequestHashModule

6.一致性hash (第三方)
参考:http://wiki.nginx.org/HttpUpstreamConsistentHash

三.相关配置

Weight:指定轮询权值,Weight值越大,分配到的访问机率截越高,主要用于后端每个服务器性能不均的情况下。

down:表示当前的server暂时不参与负载均衡,通常和ip_hash一起使用。

backup:预留的备份机器。当其他所有的非backup机器出现故障或者忙的时候,才会请求backup机器,因此这台机器的压力最轻。

max_fails:在一定时间内(这个时间在fail_timeout参数中设置)检查这个服务器是否可用时产生的最多失败请求数,默认为1。将其设置为0可以关闭检查,这些错误在proxy_next_upstream和fastcgi_next_upstream(404错误不会使max_fails增加)中定义。

fail_timeout:在这个时间内产生了max_fails所设置大小的失败尝试连接请求后这个服务器可能不可用,同样它指定了服务器不可用的时间(在下一次尝试连接请求发起之前),默认为10秒,fail_timeout与前端响应时间没有直接关系,不过可以使用proxy_connect_timeout和proxy_read_timeout来控制。

四.参考资料

http://baidutech.blog.51cto.com/4114344/1033718

http://lobert.iteye.com/blog/1929623

http://blog.csdn.net/poechant/article/details/7256184

以上就介绍了Nginx系列(十三 nginx负载均衡),包括了方面的内容,希望对PHP教程有兴趣的朋友有所帮助。

Verwandte Etiketten:
Quelle:php.cn
Erklärung dieser Website
Der Inhalt dieses Artikels wird freiwillig von Internetnutzern beigesteuert und das Urheberrecht liegt beim ursprünglichen Autor. Diese Website übernimmt keine entsprechende rechtliche Verantwortung. Wenn Sie Inhalte finden, bei denen der Verdacht eines Plagiats oder einer Rechtsverletzung besteht, wenden Sie sich bitte an admin@php.cn
Beliebte Tutorials
Mehr>
Neueste Downloads
Mehr>
Web-Effekte
Quellcode der Website
Website-Materialien
Frontend-Vorlage