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What is Discourse?

Discourse is modern forum software that can be easily installed on your Ubuntu-based Liquid Web VPS or Dedicated server to create a vibrant community-driven discussion board. Some of the more popular companies using Discourse to power their communities are New Relic, Cloudflare, and Docker.


Current requirements for Discourse include: 

  • Ruby 2.5+ 
  • PostgreSQL 10+ 
  • Redis 2.6+
  • An outgoing MTA (Discourse does not provide email itself)

Features & Plugins

Discourse has a vibrant feature set of software features. Available options include: 

  • Infinite scrolling
  • Dynamic notifications
  • Built-in mobile layout
  • Automatically expanding links
  • Single sign-on
  • Trust system
  • Powerful moderation
  • Spam blocking
  • Social login
  • Summarize topics
  • Badges/Emoji
  • Two-factor authentication
  • Diverse plugin options
  • One-click upgrades
  • Comprehensive API
  • 100% open source

Additionally, new plugins are constantly being developed for Discourse. Here are just a few of the currently available plugins.

  • Akismet Anti-Spam
  • Chat Integration
  • OAuth 2.0 & OpenID Connect Support
  • SAML Authentication
  • Canned Replies
  • Sitemap
  • Discourse Translator
  • Discourse Policy Make
  • Calendar Integration
  • Topic Tooltip Previews
  • Expandable Footnotes

Preinstall Steps

Step 1. Before you install Discourse, you will need to identify a subdomain that you will install the software on. An example subdomain would be “”

Step 2. Next, we need to ensure that the DNS is set up correctly for that subdomain so your users can access the forum. It should be noted that you can use Cloudflare for your DNS, and it will work fine with your installation.

Step 3. Next, you should be logged in as the root user using the SSH credentials for your VPS server.

Step 4. (Optional) Discourse also suggests that you sign up for a transactional email provider like Mailgun, SendGrid, Mailjet, or Elastic Email before installation as the docker image does not provide that service. Before you begin the setup, you will need to have your SMTP information handy. During the initial setup, Discourse will need the SMTP server name, SMTP user, and SMTP password.



After you have logged in as the root user, we can begin the docker install by entering the following commands. You should use the root user throughout the rest of the setup and bootstrapping process.

root@host [~]# sudo -s
root@host [~]# git clone /var/discourse

Now, cd into the Discourse folder.

root@host [~]# cd /var/discourse 

Next, we’ll run the Discourse setup command.

root@host [~/var/discourse]# ./discourse-setup

Next, we will be asked a series of questions that are required to move forward with the installation.

Hostname for your Discourse? []:
Email address for admin account(s)? [,]:
SMTP server address? []:
SMTP port? [587]:
SMTP user name? []:
SMTP password? [pa$$word]:
Let's Encrypt account email? (ENTER to skip) []: 

The Discourse setup will create an app.yml file and kick off the bootstrapping process, which can take anywhere from two to eight minutes. Once this portion completes, we will move on to the browser-based setup.

Verify Install and Continue Browser-Based Setup

Once the bootstrapping process is complete, you will be able to continue your Discourse forum setup via a web browser on the domain or subdomain.


The first time you access Discourse, you will need to set up an admin user. Add your email, username, and password as requested and click on the Register button.


Next, you will need to confirm your email address by clicking on the link provided within the activation email that was sent to the address that was provided on the last screen.

Once the admin's email verification has been completed, you will be taken to the welcome screen where you are asked to complete thirteen additional questions to finish the setup.


After completing the setup wizard, you will see Staff topics and the READ ME FIRST: Admin Quick Start Guide info. This guide contains advice to further configure and customize your Discourse software.


Ubuntu 18.04

When deploying Discourse to an Ubuntu server, we will use a sudo user instead of the root user since the root installation is discouraged in this type of setup. 


Add sudo User

To add a sudo user, run the following command.

root@host [~]# adduser username

Then, we need to switch over to that new user.

root@host [~]# su - username

Install Discourse Dependencies

As a regular user, run this script in your terminal to set up the Rails development environment.

You should ALWAYS be wary of running bash scripts from any external website, unless you are able to inspect the script in advance to determine its validity, security, and integrity. [~]# bash <(wget -qO-

This script will install the following packages onto your system in preparation for Discourse.

  • Git 
  • rbenv 
  • ruby-build 
  • Ruby (stable)
  • Rails 
  • PostgreSQL 
  • SQLite 
  • Redis 
  • Bundler 
  • MailCatcher 
  • ImageMagick 
If you already have any of the packages already installed on your system and do not want to run the entire script, simply download and save the script locally on the server and then edit the script and remove the packages you currently have installed. It should be noted however that the script has been specifically tested and designed for a Discourse install. It contains all the packages needed for a successful Discourse setup.

Once we have run the script and installed the dependencies, let’s move forward and install Discourse itself.

Install Discourse

Clone the Discourse repository into a ~/discourse folder of your choosing. [~]# git clone ~/discourse

Set up the Database

Next, we need to create a role using the same name as your Ubuntu system username. [~]# sudo -u postgres createuser -s "$USER"

Bootstrap Discourse

Now, cd into the folder where Discourse was cloned to.

cd ~/discourse

Install Ruby Gems

Once in the discourse folder, we need to install our Ruby gems.

root@host [~/discourse]# source ~/.bashrc
root@host [~/discourse]# bundle install

Next, we will set up our database configurations. Let's set up our database using the following commands.

bundle exec rake db:create
bundle exec rake db:migrate

Now, run this command to set up our specs.

bundle exec rake autospec

After that, we can start the rails server (it will only be available on localhost).

bundle exec rails server

We can then execute this command to have Rails listening on all interfaces, as well as being available remotely.

bundle exec rails server --binding=

Verify Install and Continue Browser-Based Setup

Now, we should be able to connect to the Discourse app on http://localhost:3000 and complete the browser-based setup portion. (see above web browser setup pics)

Lastly, we can set up our categories and install any needed plugins to extend functionality in Discourse. 

And that’s it! You now have a fully functional, innovative modern forum to start building your community.

We’d Love To Have You Join Us!

Just as every large business is concerned with their public-facing image and how they are perceived by their local community, online companies also have to be cognizant of their “Brand” as well and how they are recognized. With the immediacy of public feedback now being so easily available to your clients (think Facebook, Twitter, Yelp, and other social media platforms), you need to ensure that you have a voice to reply to the concerns they present.

Utilizing a system like Discourse allows you as a business owner to not only respond to your client's concerns, but also enables you to listen for suggested improvements, attend to feedback, and provide an authoritative reply to those who support your business. Try it today!

To find out more, give us a call at 800.580.4985, or open a chat or ticket with us to speak with one of our knowledgeable Solutions or Experienced Hosting advisors to learn how you can take advantage of this technology today!

P.S. Scroll down a few more inches to see how to earn a quick $$$50.00!

Avatar for Luke Cavanagh

About the Author: Luke Cavanagh

Product Operations Manager at Liquid Web. Devoted husband and Tween wrangler. Synthwave enthusiast. Jerry Goldsmith fan. Doctor Who fan and related gubbins.

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