Nginx 的负载均衡配置?

坚强一点 2020-11-13 00:46:30
配置 nginx 负载 均衡


nginx 是一款非常优秀的轻量级反向代理服务器,可以很轻松的就实现 web 的反向代理并且能够进行负载均衡。

nginx 通过 upstream 来实现负载均衡具体配置如下:

upstream web_project {
    server 127.0.0.1:8080;
    server 127.0.0.1:8081;
}
server {
    location / {
        proxy_pass http://web_project;
    }
}

其中 web_project 为 upstream 名称任意起名一般为服务名称或者项目名称,nginx 默认负载均衡策略为轮询

其他策略还有例如 加权轮询:

upstream web_project {
    server 127.0.0.1:8080 weight=1;
    server 127.0.0.1:8081 weight=2;
}

其中 weight 表示权重,数字越大,负载越重。例子中的第二个服务负载是第一个负载的2倍

在比如:IP hash:

upstream web_project {
    ip_hash;
    server 127.0.0.1:8080;
    server 127.0.0.1:8081;
}

同一个客户端IP会被分配到同一个服务上可用来简单的解决分布式 session 不一致问题。

在比如 fair:

upstream web_project {
server 127.0.0.1:8080;
server 127.0.0.1:8081;
fair;
}

按服务的响应时间来分配,响应时间短的优先分配

在比如  url_hash:

upstream web_project {
server 127.0.0.1:8080;
server 127.0.0.1:8081;
hash $request_uri;
hash_method crc32;
}

URL hash 和 IP hash 相似,不过是已URL作为 hash 源,可用保证同一个请求会被分配到同一个服务,其中 hash_method 表示使用的 hash 算法。

最后再来一个完整的配置


upstream web_project {
server 127.0.0.1:8080;
server 127.0.0.1:8081;
}
server {
listen 80;
server_name www.zux2.com;
root /home/webroot;
location / {
index index.html;
}
location ~.json$ { # 动态请求(所有以.json结尾的请求)负载均衡,
proxy_pass http://web_project;
}
}

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版权声明
本文为[坚强一点]所创,转载请带上原文链接,感谢
https://blog.csdn.net/wab719591157/article/details/87889078

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