How to Install Discourse Forum with Docker on CentOS 8
Discourse is a free and open-source platform built for the next decade of the Internet. It is a modern forum software that can be used as a mailing list, discussion forum, long-form chat room, and more. It uses Ruby on Rails for the backend, Ember.js for the front end, PostgreSQL as a data store, and Redis as a caching server. It is simple, efficient, mobile-friendly, customizable, and makes online discussion easy and fun.
In this tutorial, we will show you how to install Discourse forum using Docker on CentOS 8 server.
- A server running CentOS 8.
- A valid domain name pointed with your server IP.
- A root password is configured the server.
First, you will need to install Docker in your server. By default, Docker is not available in the CentOS 8 standard repository. So you will need to add the Docker official repo to your system. You can add it with the following command:
dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo
Once the repo is created, install the Docker by running the following command:
dnf install docker-ce --nobest
After installing Docker, start the Docker service and enable it to start at system reboot with the following command:
systemctl start docker
systemctl enable docker
You can now verify the Docker version using the following command:
You should see the following output:
Docker version 20.10.1, build 831ebea
First, create a directory for Discourse with the following command:
Next, download the latest version of Discourse from the Git repository using the following command:
git clone https://github.com/discourse/discourse_docker.git /opt/discourse
Next, change the directory to Discourse and install the Discourse with the following command:
You will be asked to provide your FQDN as shown below:
which: no docker.io in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin) which: no docker.io in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin) Ports 80 and 443 are free for use 'samples/standalone.yml' -> 'containers/app.yml' Found 4GB of memory and 2 physical CPU cores setting db_shared_buffers = 1024MB setting UNICORN_WORKERS = 4 containers/app.yml memory parameters updated. Hostname for your Discourse? [discourse.example.com]: discourse.linuxbuz.com
Provide your valid domain name and press Enter. You will be asked to provide your valid email address and password:
Checking your domain name . . . Connection to discourse.linuxbuz.com succeeded. Email address for admin account(s)? [[email protected],[email protected]]: [email protected] SMTP server address? [smtp.example.com]: smtp.gmail.com SMTP port? : SMTP user name? [[email protected]]: [email protected] SMTP password? [pa$$word]: yourpassword Optional email address for Let's Encrypt warnings? (ENTER to skip) [[email protected]]: [email protected] Does this look right?
Provide all the details and press Enter. You will need to verify all the setup as shown below:
Hostname : discourse.linuxbuz.com Email : [email protected] SMTP address : smtp.gmail.com SMTP port : 587 SMTP username : [email protected] SMTP password : yourpassword Let's Encrypt : [email protected] ENTER to continue, 'n' to try again, Ctrl+C to exit:
If everything is fine then press Enter to start the installation. Once the installation has been completed, you should get the following output:
+ /usr/bin/docker run --shm-size=512m -d --restart=always -e LANG=en_US.UTF-8 -e RAILS_ENV=production -e UNICORN_WORKERS=4 -e UNICORN_SIDEKIQS=1 -e RUBY_GLOBAL_METHOD_CACHE_SIZE=131072 -e RUBY_GC_HEAP_GROWTH_MAX_SLOTS=40000 -e RUBY_GC_HEAP_INIT_SLOTS=400000 -e RUBY_GC_HEAP_OLDOBJECT_LIMIT_FACTOR=1.5 -e DISCOURSE_DB_SOCKET=/var/run/postgresql -e DISCOURSE_DB_HOST= -e DISCOURSE_DB_PORT= -e LETSENCRYPT_DIR=/shared/letsencrypt -e DISCOURSE_HOSTNAME=discourse.linuxbuz.com -e [email protected] -e DISCOURSE_SMTP_ADDRESS=smtp.gmail.com -e DISCOURSE_SMTP_PORT=587 -e [email protected] -e DISCOURSE_SMTP_PASSWORD=yourpassword -e [email protected] -h centos8-app -e DOCKER_HOST_IP=172.17.0.1 --name app -t -p 80:80 -p 443:443 -v /var/discourse/shared/standalone:/shared -v /var/discourse/shared/standalone/log/var-log:/var/log --mac-address 02:e0:37:60:d3:09 local_discourse/app /sbin/boot ab3bdf3c169d47d9ff06052f48ff078d46393f1152b651b9fd3354594cc38714
You can now verify the Discourse running container with the following command:
You should see the following output:
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES ab3bdf3c169d local_discourse/app "/sbin/boot" 22 seconds ago Up 21 seconds 0.0.0.0:80->80/tcp, 0.0.0.0:443->443/tcp app
Access Discourse Web UI
Now, open your web browser and type the URL https://discourse.linuxbuz.com. You will be redirected to the Discourse setup screen:
Click on the Register button. You should see the Registration page:
Provide your email, username, password and click on the Register button. You should receive an email to activate your account.
Congratulations! you have successfully installed Discourse forum software on CentOS 8. You can now explore the Discourse for more features and deploy it in the production environment. Feel free to ask me if you have any questions.