Nginx Read-Write separation

The general website is used rsync+inotify enables file synchronization, whileRsync+inotify does not synchronize in two directions, so this time we are going to use the read and write separation. topology: Nginx:192.168.137.50:80
back-end web:apache1:192.168.137.51:80
                           apache2:192.168.137.52:80
Here we use Nginx as the reverse proxy, using the IFstatements, and$request _method Module for read-write separation,
The configuration is as follows:

server {

Listen 80;

server_name localhost;

#charset Koi8-r;

#access_log Logs/host.access.log Main;

Location/{

Proxy_pass http://192.168.137.51/;

if ($request _method = "PUT") {

Proxy_pass http://192.168.137.52;

}

Index index.html index.htm;

}

when$request _method is put, we forward the request to a write-only web side.

to restart Nginx, use Curl test:

[Email protected] conf]# Curl http://192.168.137.50

[Email protected] conf]# Curl http://192.168.137.50

[Email protected] conf]# Curl http://192.168.137.50

[Email protected] conf]# Curl http://192.168.137.50

the read was forwarded only to the 192.168.137.51 end;

Open the 192.168.137.52-side Apache upload module:

Vim/etc/httpd/conf/httpd.conf

Added under <directory "/var/www/html" >:

DAV on Can

Test:

[Email protected] conf]# curl-t/etc/passwd http://192.168.137.50

<! DOCTYPE HTML PUBLIC "-//ietf//dtd HTML 2.0//en" >

<title>403 forbidden</title>

<p>you don ' t has permission to ACCESS/PASSWD

On this server.</p>

<address>apache/2.2.15 (CentOS) Server at 192.168.137.52 Port 80</address>

</body>

403 occurs because the Apache directory belongs to the group root, so here are the modifications:

Setfacl-m u:apache:rwx/var/www/html/

Test again:

[Email protected] conf]# curl-t/etc/passwd http://192.168.137.50

<! DOCTYPE HTML PUBLIC "-//ietf//dtd HTML 2.0//en" >

<title>201 created</title>

<P>RESOURCE/PASSWD has been created.</p>

<address>apache/2.2.15 (CentOS) Server at 192.168.137.52 Port 80</address>

</body>

and we can see that the file was uploaded to the 192.168.137.52 end.

This article is from the "Linux" blog, so be sure to keep this source http://syklinux.blog.51cto.com/9631548/1837046

Nginx Read-Write separation