Nginx as Google Cloud Storage Cache

gs.nginx.conf

# Cache 10GB for 1 Month
proxy_cache_path           /var/cache/nginx keys_zone=GS:10m inactive=720h max_size=10240m;

upstream gs {
    server                   'storage.googleapis.com:80';
    keepalive                100;
}

server {
    set $my_domain "yourdomain.com";

    listen 80;
    server_name $my_domain;

    # Logs
    access_log off;
    error_log /var/log/nginx/$my_domain.error.log debug;

    # Cache Control
    expires max;
    add_header Cache-Control "public, max-age=31536000";

    # Nameserver
    resolver                   8.8.8.8 valid=300s;
    resolver_timeout           10s;

    # Proxy Cache
    proxy_temp_path /tmp/nginx;
    proxy_cache_lock on;
    proxy_cache_key "$uri"; # Ignore Parameters

    # https://github.com/FRiCKLE/ngx_cache_purge
    proxy_cache_purge on from 127.0.0.1;
	
    # Limit Request Methods to GET|HEAD|PURGE
    if ( $request_method !~ "GET|HEAD|PURGE" ) {
        return 405;
    }
	
    location / {
        proxy_set_header    Host storage.googleapis.com;
        proxy_hide_header   x-goog-hash;
        proxy_hide_header   x-goog-generation;
        proxy_hide_header   x-goog-metageneration;
        proxy_hide_header   x-goog-stored-content-encoding;
        proxy_hide_header   x-goog-stored-content-length;
        proxy_hide_header   x-goog-storage-class;
        proxy_hide_header   x-xss-protection;
        proxy_hide_header   accept-ranges;
        proxy_hide_header   alternate-protocol;
        proxy_hide_header      Set-Cookie;
        proxy_ignore_headers   "Set-Cookie";
        proxy_intercept_errors on;
     
        proxy_cache            GS;
        proxy_cache_valid      200 720h; # Cache For 1 Month
        proxy_cache_bypass     $http_cache_purge;
        add_header              X-Cache $upstream_cache_status;
        
        proxy_http_version     1.1;
        proxy_set_header       Connection "";
        proxy_pass             http://gs/$my_domain$uri;
    }
}