nginx反向代理缓存静态文件

环境：
nginx   反向代理    172.16.0.100
apache1 web     172.16.0.110
apache2 web     172.16.0.120

目的：网站静态文件分离为多个域名，每个域名分别在两台apache上做负载均衡，nginx缓存静态文件，并实现故障转移……

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nginx配置:
vim /usr/local/nginx/conf/proxy.conf
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_ignore_client_abort on;
proxy_connect_timeout 90;
proxy_send_timeout 90; proxy_read_timeout 90;
proxy_next_upstream error timeout invalid_header http_500 http_503 http_404;
proxy_set_header Accept-Encoding '';

vim /usr/local/nginx/conf/nginx.conf
server{
        listen 80;
    server_name jpg.test.com;
    root /data/webroot/jpg;

    location ~* .*\.(jpg|gif|js|css|html|htm)$ {
        expires 1d;
        proxy_store on;
        proxy_store_access user:rw group:r all:r;
        proxy_temp_path /data/webroot/jpg;
        include proxy.conf;
 if ( !-e $request_filename) {
        proxy_pass  http://jpg;}}
}

server{
        listen 80;
        server_name jpg1.test.com;
        root /data/webroot/jpg1;

        location ~* .*\.(jpg|gif|js|css|html|htm)$ {
                expires 1d;
                proxy_store on;
                proxy_store_access user:rw group:r all:r;
                proxy_temp_path /data/webroot/jpg1;
 include proxy.conf;
                if ( !-e $request_filename) {
                proxy_pass  http://jpg1;}}
}

server{
        listen 80;
        server_name jpg2.test.com;
        root /data/webroot/jpg2;

        location ~* .*\.(jpg|gif|js|css|html|htm)$ {
                expires 1d;
                proxy_store on;
                proxy_store_access user:rw group:r all:r;
                proxy_temp_path /data/webroot/jpg2;
          include proxy.conf;
                if ( !-e $request_filename) {
                proxy_pass  http://jpg2;}}
}

server{
        listen 80;
        server_name jpg3.test.com;
        root /data/webroot/jpg3;

        location ~* .*\.(jpg|gif|js|css|html|htm)$ {
                expires 1d;
                proxy_store on;
                proxy_store_access user:rw group:r all:r;
                proxy_temp_path /data/webroot/jpg3;
          include proxy.conf;
                if ( !-e $request_filename) {
                proxy_pass  http://jpg3;}}
}




upstream jpg {
     server 172.16.0.110:80 max_fails=3 fail_timeout=30s;
     server 172.16.0.120:80 max_fails=3 fail_timeout=30s;
}
upstream jpg1 {
     server 172.16.0.110:81 max_fails=3 fail_timeout=30s;
     server 172.16.0.120:81 max_fails=3 fail_timeout=30s;
}
upstream jpg2 {
     server 172.16.0.110:82 max_fails=3 fail_timeout=30s;
     server 172.16.0.120:82 max_fails=3 fail_timeout=30s;
}
upstream jpg3 {
     server 172.16.0.110:83 max_fails=3 fail_timeout=30s;
     server 172.16.0.120:83 max_fails=3 fail_timeout=30s;
}

---------------------------------------------

apache都使用以下配置：注意使用端口区分！！！

<VirtualHost *:80>
    ServerAdmin [email protected]
    DocumentRoot "/data/webroot/jpg"
    ServerName jpg.test.com
</VirtualHost>

<VirtualHost *:81>
    ServerAdmin [email protected]
    DocumentRoot "/data/webroot/jpg"
    ServerName jpg1.test.com
</VirtualHost>

<VirtualHost *:82>
    ServerAdmin [email protected]
    DocumentRoot "/data/webroot/jpg2"
    ServerName jpg2.test.com
</VirtualHost>

<VirtualHost *:83>
    ServerAdmin [email protected]
    DocumentRoot "/data/webroot/jpg3"
    ServerName jpg3.test.com
</VirtualHost>

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总结：
1、防盗链
如果apache使用了图片防盗链，则nginx不用再做防盗链配置
2、apache

if ( !-e $request_filename) {
    proxy_pass  http://172.16.0.110:83;}
还可以改/etc/hosts文件，解析域名到对应后端web服务器。建议使用端口方式！
4、关于proxy_set_header Accept-Encoding '';
nginx 向后端请求 gzip 内容
proxy_set_header Accept-Encoding 'gzip';
nginx 向后端请求未 gzip 内容
proxy_set_header Accept-Encoding '';
5、nginx定义服务器集时最好使用端口定义不同服务器
6、 proxy_temp_path定义的目录nginx为了有写入权限，会在重启nginx时自动把此目录属主改为nginx进程用户
7、proxy_next_upstream设定了相应条件后，nginx只查寻一遍，不会无限制查询