nginx 作为Web缓存服务器
userwww www;worker_processes8;
error_loglogs/error.log crit;
pid logs/nginx.pid;
worker_rlimit_nofile 65535;
events {
worker_connections65535;
}
http {
include mime.types;
default_typeapplication/octet-stream;
server_names_hash_bucket_size 128;
client_header_buffer_size 32k;
large_client_header_buffers 4 32k;
client_max_body_size 300m;
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout65;
client_body_buffer_size 512k;
proxy_connect_timeout 5;
proxy_read_timeout 60;
proxy_send_timeout 5;
proxy_buffer_size 16k;
proxy_buffers 4 64k;
proxy_busy_buffers_size 128k;
proxy_temp_file_write_size 128k;
gzipon;
gzip_min_length 1k;
gzip_buffers 4 16k;
gzip_http_version 1.1;
gzip_comp_level 2;
gzip_types text/plain application/x-javascript text/css application/xml;
gzip_vary on;
#注：proxy_temp_path和proxy_cache_path指定的路径必须在同一分区
proxy_temp_path /data/proxy_temp_dir;
proxy_cache_path /data/proxy_cache_dir levels=1:2 keys_zone=cache_one:200m inactive=1d max_size=30g;
#设置Web缓存区名称为cache_one，内存缓存空间大小为200MB，1天清理一次缓存，硬盘缓存空间大小为30G
upstream web_proxy_cache {
server 192.168.56.113:80 weight=1 max_fails=2 fail_timeout=30s;
server 192.168.56.114:80 weight=1 max_fails=2 fail_timeout=30s;
}
server {
listen 80;
server {
listen 80;
server_name192.168.56.120;
root /data/web/www;
indexindex.html index.htm;
location / {
proxy_next_upstream http_502 http_504 error timeout invalid_header;
# 如果后端的服务器返回502、504、执行超时等错误，自动将请求转发到upstream负载均衡池中的另一台服务器，实现故障转移
proxy_cache cache_one;
proxy_cache_valid 200 304 12h; #对不同的HTTP状态码设置不同的缓存时间
# 以域名、URI、参数组合成Web缓存的Key值，Nginx根据Key值哈希，存储缓存内容到二级缓存目录内
proxy_cache_key $host$uri$is_args$args;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_pass http://web_proxy_cache;
expires 1d;
}
# 用于清除缓存，假设一个URL为http://192.168.56.120/test.txt，通过访问http://192.168.56.120/purge/test.txt就可以清除该URL的缓存。
location ~ /purge(/.*) {# 设置只允许指定的IP或IP段才可以清除URL缓存
allow 127.0.0.1;
allow 192.168.56.0/24;
deny all;
proxy_cache_purge cache_one $host$1$is_args$args;
}
location ~ .*\.(php|jsp|cgii)?$ {# 扩展名以.php、.jsp、.cgi结尾的动态应用程序不缓存
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_pass http://web_proxy_cache;
}
access_log off;
}
}
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