nginx---反向代理缓存

文件服务器：192.168.1.6 

ll -h m.html 
-rw-r--r-- 1 root root 587K Jun  8 13:06 m.html

测试服务器：192.168.1.4

没开启缓存前测试访问 

ab -c1000 -n 2000 www.test.net/api/m.html 
This is ApacheBench, Version 2.3 <$Revision: 1430300 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking www.test.net (be patient)
Completed 200 requests
Completed 400 requests
Completed 600 requests
Completed 800 requests
Completed 1000 requests
Completed 1200 requests
Completed 1400 requests
Completed 1600 requests
Completed 1800 requests
Completed 2000 requests
Finished 2000 requests


Server Software:        nginx/1.20.1
Server Hostname:        www.test.net
Server Port:            80

Document Path:          /api/m.html
Document Length:        601019 bytes

Concurrency Level:      1000
Time taken for tests:   7.535 seconds
Complete requests:      2000
Failed requests:        0
Write errors:           0
Total transferred:      1202554000 bytes
HTML transferred:       1202038000 bytes
Requests per second:    265.43 [#/sec] (mean)
Time per request:       3767.446 [ms] (mean)
Time per request:       3.767 [ms] (mean, across all concurrent requests)
Transfer rate:          155857.46 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0   19  18.7      3      48
Processing:    49 2107 2358.3    358    7460
Waiting:        2 2082 2351.3    335    7446
Total:         96 2126 2371.3    367    7498

Percentage of the requests served within a certain time (ms)
  50%    367
  66%   3096
  75%   3440
  80%   3668
  90%   7097
  95%   7299
  98%   7422
  99%   7480
 100%   7498 (longest request)

　　在nginx服务器上定义缓存

　　　　1、在主配置文件http位置定义缓存信息，

vim /etc/nginx/nginx.conf 

缓存信息如下：

 proxy_cache_path /var/cache/nginx/proxy_cache levels=1:2:2 keys_zone=proxycache:20m inactive=120s max_size=1g;

proxycache 起的名字 ，/var/cache/nginx/proxy_cache缓存的目录，proxy_cache 会自动创建，但如果上级目录nginx不存在则手动创建即可

　　　　2、在虚拟主机中引用缓存

vim /etc/nginx/conf.d/test.conf 

server {
        listen 80;
        server_name www.test.net;
        root /data/site1/;

        proxy_cache proxycache;
        proxy_cache_key $request_uri;
        proxy_cache_valid 200 302 301 1h;
        proxy_cache_valid any 1m;

        location ~.*\.(jpg|png|jpeg)$ {
                proxy_pass http://192.168.1.4;

        }
        location /api {
                proxy_set_header X-Real-IP $remote_addr;
                proxy_pass http://192.168.1.6;
        }
        access_log /var/log/nginx/test_net.log ;
}

　　　　3、重启服务

systemctl restart nginx

　　　　4、在缓存文件存放位置会生成如下的缓存文件

tree
.
└── d
    └── 3a
        └── 98fc652186a4c0471a27257b60cb9d3ad