nginx configuration with multiple location blocks

Question

I'm trying to configure nginx to serve 2 different php scripts from 2 different location. The configuration is as follows.

1. I have a Laravel installation which resides in /home/hamed/laravel in which its public directory should be served.
2. I have a Wordpress installation in /home/hamed/www/blog.

And this is my nginx configuration:

server {
        listen  443 ssl;
        server_name example.com www.example.com;

        #root /home/hamed/laravel/public;

        index index.html index.htm index.php;

        ssl_certificate /root/hamed/ssl.crt;
        ssl_certificate_key /root/hamed/ssl.key;

        location /blog {
                root /home/hamed/www/blog;
                try_files $uri $uri/ /blog/index.php?do=$request_uri;
        }

        location / {
                root /home/hamed/laravel/public;
                try_files $uri $uri/ /index.php?$request_uri;
        }
        error_page 404 /404.html;
        error_page 500 502 503 504 /50x.html;
        location = /50x.html {
                root /usr/share/nginx/html;
        }

        location ~ \.php$ {
                try_files $uri =404;
                fastcgi_split_path_info ^(.+\.php)(/.+)$;
                #fastcgi_pass 127.0.0.1:9000;
                fastcgi_pass unix:/var/run/php5-fpm.hamed.sock;
                fastcgi_index index.php;
                fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
                include fastcgi_params;
        }

}

The problem is when trying to access the wordpress section by calling example.com/blog still the the laravel installtion takes over the request.

Now I have tried replacing root directive inside location blocks with alias to no avail.

According to this guide having the index directive or try_files inside location triggers an internal redirect which I suspect causes this behavior.

Would someone please help me figure this out?

Answer 1

The problem is that location ~ \.php$ { ... } is responsible for handling all of your php scripts, which are divided across two different roots.

One approach is to use a common root for the server container and perform internal rewrites within each prefix location block. Something like:

location /blog {
  rewrite ^(.*\.php)$ /www$1 last;
  ...
}
location / {
  rewrite ^(.*\.php)$ /laravel/public$1 last;
  ...
}
location ~ \.php$ {
  internal;
  root /home/hamed;
  ...
}

The above should work (but I have not tested it with your scenario).

The second approach is to use nested location blocks. The location ~ \.php$ { ... } block is then replicated in each application's location block. Something like:

location /blog {
  root /home/hamed/www;
  ...
  location ~ \.php$ {
    ...
  }
}
location / {
  root /home/hamed/laravel/public;
  ...
  location ~ \.php$ {
    ...
  }
}

Now that one has been tested to work.

Answer 2

Thanks to @RichardSmith I finally managed to create the right configuration. Here is the final working config. I had to use the combination of nested location blocks and an inverse regex match for it to work.

server {
    listen  443 ssl;
        server_name example.com;
        root /home/hamed/laravel/public;

#        index index.html index.htm index.php;

        ssl_certificate /root/hamed/ssl.crt;
        ssl_certificate_key /root/hamed/ssl.key;

        location ~ ^/blog(.*)$ {
        index index.php;
        root /home/hamed/www/;
        try_files $uri $uri/ /blog/index.php?do=$request_uri;

        location ~ \.php$ {
                    try_files $uri =404;
                    fastcgi_split_path_info ^(.+\.php)(/.+)$;
                    #fastcgi_pass 127.0.0.1:9000;
                    fastcgi_pass unix:/var/run/php5-fpm.hamed.sock;
                    fastcgi_index index.php;
                    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
                    include fastcgi_params;
            }

        }

    location ~ ^((?!\/blog).)*$ { #this regex is to match anything but `/blog`
        index index.php;
                root /home/hamed/laravel/public;
                try_files $uri $uri/ /index.php?$request_uri;
        location ~ \.php$ {
                    try_files $uri =404;
                    fastcgi_split_path_info ^(.+\.php)(/.+)$;
                    #fastcgi_pass 127.0.0.1:9000;
                    fastcgi_pass unix:/var/run/php5-fpm.hamed.sock;
                    fastcgi_index index.php;
                    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
                    include fastcgi_params;
            }
        }


        error_page 404 /404.html;
        error_page 500 502 503 504 /50x.html;
        location = /50x.html {
                root /usr/share/nginx/html;
        }


}