How to setup DEV/PROD website on public IP - apache

Question

This is for
Apache/2.4.7 (Ubuntu)
Ubuntu 14.04 LTS
I have a server with a certain IP address (example 22.22.22.22). I want to setup a DEV, a TEST and PROD environment.
for example if I go, from any computer in the world
1) to http://22.22.22.22 then I will hit the production website
2) to http://22.22.22.22/dev then I will hit the development website
3) to http://22.22.22.22/test then I will hit the testing website
How can I set this up?
Please share your suggestions and thoughts around this.
Thanks!

Answer 1

Not exactly what you asked for—I would take a slightly different approach. You will have a domain name, say example.com. You would have www.example.com and example.com point to your production site. Then you could have dev.example.com and test.example.com point to their respective sites. All of the DNS entries would still point to 22.22.22.22, but you would set up Apache to deal with them differently. This uses Apache named virtual hosts.
On the standard install of Apache, the site configurations should be in /etc/apache2/sites-available. To start with, there should be a configuration file named default. Create a new file prod with contents like the following:
# /etc/apache2/sites-available/prod
<VirtualHost 22.22.22.22:80>
ServerName example.com
ServerAlias www.example.com
DocumentRoot /var/www/prod/html
(etc.)
</VirtualHost>
I've got the basics there, but you can look at the default for other directives you'll want there.
Next you create files for dev and test. Like so:
# /etc/apache2/sites-available/dev
<VirtualHost 22.22.22.22:80>
ServerName dev.example.com
DocumentRoot /var/www/dev/html
(etc.)
</VirtualHost>
It should be basically the same as prod, but different DocumentRoot and ServerName. The config for test will be almost the same too.
Once you have these set up, you just need to enable them. Run:
sudo a2ensite dev
...this enables dev. same thing again for test. After you run this, you should see the files are now also symlinked in /etc/apache2/sites-enabled. (The a2ensite command creates the symlink.)
Next, you just restart Apache. One way is: sudo service apache2 restart