dokku-custom-domains

Dokku plugin to configure additional custom domains for your dokku app.

Background

If you add a custom domain to your heroku app, you can count on the fact that it will work in the same manner as the appname.herokuapp.com domain. The purpose of this plugin is to bring this possibility to dokku users.

What differentiates this plugin from other dokku domain-related plugins?

Unlike other domain-related plugins, this plugin will update the existing app nginx.conf instead of rewriting it or coupling it with a similar but different vhost setup for the additional domains. Having to maintain two different set-ups of nginx vhost configuration would unnecessarily add to the maintenance costs, provides more sources for error, and go against the Unix philosophy: "Write programs that do one thing and do it well. Write programs to work together."

How does it work?

The plugin modifies the nginx "server_name" directive to include all custom domains set by domains:set.

Requirements

Dokku >= 0.3.1

Installation

git clone https://github.com/neam/dokku-custom-domains.git /var/lib/dokku/plugins/custom-domains

Commands

$ dokku help
    domains <app>                                   display the domains for an app
    domains:set <app> DOMAIN1 [DOMAIN2 ...]         set one or more domains

Simple usage

Add domains

Create vhost with a custom domain:

$ dokku domains:set <app> myawesomeapp.com www.myawesomeapp.com            # Server side
$ ssh dokku@server domains:set <app> myawesomeapp.com www.myawesomeapp.com # Client side

Create vhost with a second sub-domain:

$ dokku domains:set <app> subdomain.myawesomeapp.com            # Server side
$ ssh dokku@server domains:set <app> subdomain.myawesomeapp.com # Client side

Create vhost with a wildcard domain:

$ dokku domains:set <app> *.myawesomeapp.com            # Server side
$ ssh dokku@server domains:set <app> *.myawesomeapp.com # Client side

Create vhost with multiple additional domains:

$ dokku domains:set <app> myawesomeapp.com www.myawesomeapp.com anotherawesomedomain.com www.anotherawesomedomain.com            # Server side
$ ssh dokku@server domains:set <app> myawesomeapp.com www.myawesomeapp.com anotherawesomedomain.com www.anotherawesomedomain.com # Client side

Remove domains

Unlike heroku that uses domains:add and domains:remove, this plugin has only domains:set. To remove a domain, omit them from the arguments. So, if the domains are myawesomeapp.com www.myawesomeapp.com anotherawesomedomain.com www.anotherawesomedomain.com and you want to remove anotherawesomedomain.com www.anotherawesomedomain.com, run:

$ dokku domains:set <app> myawesomeapp.com www.myawesomeapp.com            # Server side
$ ssh dokku@server domains:set <app> myawesomeapp.com www.myawesomeapp.com # Client side

Notes

The original domain set by dokku (through the standard nginx-vhosts plugin) is kept active.

If you destroy the app, any custom domains assigned to it will be freed. You can subsequently assign them to other apps.

Unit tests

This plugin uses assert.sh 1.0 - bash unit testing framework and ships with relevant tests thanks to wmluke.

To run the tests:

make test

License

MIT