So erhalten Sie die Benutzer-IP auf dem Nginx der zweiten Ebene des zweistufigen Servers
1. Bei der Konfiguration des Nginx-Servers ist zuvor ein Problem aufgetreten. Der Server hat eine Funktion verwendet, um die maximale Anzahl gleichzeitiger Verbindungen des Clients zu begrenzen. Die Implementierung dieser Funktion beruhte auf der Ausführung von
$remote-addr
$proxy_add_x_forwarded_for
upstream dnsnginx1 { server[*.*.*.*/yourhostname]:8080 weight=10000; #填IP、域名 } server { listen 80; server_name #access_log logs/host.access.log main location /{ proxy_pass http://dnsnginx1; 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_set_header HTTP_X_FORWARDED_FOR $remote_addr; proxy_redirect default; } }
limit_conn_zone $proxy_add_x_forwarded_for zone=addr:10m; # 并发设置 空间10M server { listen 8080; server_name [*.*.*.*/yourhostname]:8080 weight=10000; #填IP、域名 limit_conn addr 1; #限制客户端最大并发连接数为 1 location / { root html; index index.html index.htm; } }
hash =ngx_crc32_short(key.data, key.len); If(“” == &ctx->key){ <span style="white-space:pre"> </span>If(NULL!= r->main->headers_in->x_forwarded_for->elts){ key.data= *(char*)r->main->headers_in->x_forwarded_for->elts; key.len = 4; hash =ngx_crc32_short(key.data, key.len); <span style="white-space:pre"> </span>} }
HTTP/1.1503-Dienst VORÜBERGEHEND nicht verfügbar
HTTP/1.1503-Dienst TEMAVAILBLE T>
HTTP/1.1503-Dienst vorübergehend nicht verfügbar. Universitätsdienst vorübergehend nicht verfügbar.
HTTP/1.1503 Service Temporarily Unavailable
HTTP/1.1503 Service Temporarily Unavailable
HTTP/1.1503 Service Temporarily Unavailable
HTTP/1.1503 Service Temporarily Unavailable
HTTP/1.1503 Service Temporarily Unavailable
HTTP/1.1503 Service Temporarily Unavailable
HTTP/1.1503 Service Temporarily Unavailable
HTTP/1.1 200 OK
<… repeated 往下均为重复8次HTTP/503 与1次HTTP/200 交替出现>
English Version
How to retrievethe true ip of the client user if there are two layers of servers
Days before, wehave been faced such a difficulty which is we can’t use the variable $remote_addr for gathering the clients’ip address. This problem surfaces when we used a proxy server between the trueserver and client, which is actually a cdn. And that makes our functions oflimiting the maximum connections a client can make to a server at a time. Thissituation can also found if the load balance or any anti-spam service are inuse. So that’s why we can’t use remote_addr variable further.
After I did someresearch on the documentation and the code , I found out that this problem canbe solved by replacing the
$remote_addr
$proxy_add_x_forwarded_for
And now I shall makean easy example to practically use this method.
First of all,build up a Nginx server.
Here, I will usethe 1.7.9 version (latest to the written time) for instance, therefore, thereexist some differences between older versions than 1.7.1 (see FAQ 1)
1. Download A Nginx Copy:
[lugt@localhostmysql]$ wget http://nginx.org/download/nginx-1.7.9.tar.gz
2. Decompress the file
[lugt@localhostmysql]$ tar zxvf nginx-1.7.9.tar.gz
3. Compile The Code
[lugt@localhostmysql]$ cd nginx-1.7.9
[lugt@localhostnginx-1.7.9]$ ./configure
[lugt@localhostnginx-1.7.9]$ make
[lugt@localhostnginx-1.7.9]$ su
[lugt@localhostnginx-1.7.9]$ make install
4. And edit the config file nginx.conf
[lugt@localhost nginx-1.7.9]$ su
[lugt@localhostnginx-1.7.9]$ cd /usr/local/nginx
[lugt@localhostnginx]$ vi conf/nginx.conf
There add suchdirectives to the server1 for emulate for an CDN server
upstream dnsnginx1 { server[*.*.*.*/yourhostname]:8080 weight=1000; #fill in your ip/hostname } server { listen 80; server_name [hostname] #fill your ip/ hostname here #access_log logs/host.access.log main location /{ proxy_pass http://dnsnginx1; 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_set_header HTTP_X_FORWARDED_FOR $remote_addr; proxy_redirect default; } }
After the end ofone server directive, and in the http directive, add so to function the sever2
limit_conn_zone $proxy_add_x_forwarded_for zone=addr:10m; # sample setting server { listen 8080; server_name [*.*.*.*/hostname]:8080 weight=10000; #fill in ip/hostname here limit_conn addr 1; # Enablethe limitation of connection per ip at a time to 1. location / { root html; index index.html index.htm; } }
And then you cansave , test the config file and run nginx
Test your configfile:
[lugt@localhostnginx]$ ./sbin/nginx –t
Start the nginx server
[lugt@localhostnginx]$ ./sbin/nginx
Now, the serverhas been set and you can run a test at instance.
/* This CommandMeans to run a tool to connect to server as 10conn/once and 10 conns in total*/
[lugt@localhost~]$ ab -c 10 -n 100 -v 4 http://127.0.0.1/ | grep HTTP/1.1
FAQ 1
There is actuallysome little malfunctions when using elder versions than 1.7.1 (Probably the newversion has it for a new feature).So to use this directive in earlier versions,some code need to be added.
As a Example inthe version 1.6.1
In filesrc/http/modules/ngx_http_limit_conn.c Line around 184
hash =ngx_crc32_short(key.data, key.len); If("" == &ctx->key){ If(NULL!= r->main->headers_in->x_forwarded_for->elts){ key.data= *(char*)r->main->headers_in->x_forwarded_for->elts; key.len = 4; hash =ngx_crc32_short(key.data, key.len); }
}<span style="font-family: Arial, Helvetica, sans-serif;"> </span>
FAQ 2 TestingResults
[lugt@localhost~]$ ab -c 10 -n 100 -v 4 http://127.0.0.1/ | grep HTTP/1.1
HTTP/1.1503 Service Temporarily Unavailable
HTTP/1.1503 Service Temporarily Unavailable
HTTP/1.1503 Service Temporarily Unavailable
HTTP/1.1503 Service Temporarily Unavailable
HTTP/1.1503 Service Temporarily Unavailable
HTTP/1.1503 Service Temporarily Unavailable
HTTP/1.1503 Service Temporarily Unavailable
HTTP/1.1503 Service Temporarily Unavailable
HTTP/1.1503 Service Temporarily Unavailable
HTTP/1.1 200 OK
HTTP/1.1503-Dienst vorübergehend nicht verfügbar
HTTP/1.1503-Dienst vorübergehend nicht verfügbar
HTTP/1.1503-Dienst vorübergehend nicht verfügbar
HTTP/1.1503-Dienst vorübergehend nicht verfügbar
HTTP/1.1503-Dienst vorübergehend nicht verfügbar
HTTP/1.1503-Dienst vorübergehend nicht verfügbar
HTTP/1.1503-Dienst vorübergehend nicht verfügbar
HTTP/1.1503-Dienst vorübergehend nicht verfügbar
HTTP /1.1503-Dienst vorübergehend nicht verfügbar
HTTP/1.1 200 OK
<… 8 Mal HTTP/503 und 1 Mal HTTP/200 usw. wiederholt>
Das Obige stellt vor, wie man die Benutzer-IP auf dem Nginx der zweiten Ebene des zweischichtigen Servers erhält, einschließlich der relevanten Inhalte. Ich hoffe, dass es für Freunde hilfreich ist, die an PHP-Tutorials interessiert sind.