docker-wordpress

WordPress server running in docker with Swarm Secrets

Prerequisites

• Install Docker
• Install Docker Compose

Optional: Add user to Docker group

If you want to interact with Docker without running sudo, add your current user to the Docker group with sudo usermod -aG docker YOURUSER

NOTE: The rest of this document will assume this is done. If you didn't add your user to the group, just preface all docker commands with sudo

Create Swarm

To securely manage passwords (using docker secrets), you'll need to put your machine into Swarm Mode. Don't worry though, you can run a swarm with a single node, but this is required to use docker secrets.

To do this, just run docker swarm init

Prepare containers

Create Docker Compose File

From the contents of the compose file from this repository, add and modify as needed.

Create docker secrets

Docker secrets are a secure way to store sensitive data. Create them with the following commands, filling in your desired passwords:

echo P@55w0rd | docker secret create db_root_password -
# db_root_password
echo P@55w0rd | docker secret create db_password -
# db_password

Create docker volumes

You may have noticed the volumes used in the compose file are external. We will need to create these:

docker volume create db_data
# db_data
docker volume create wp_data
# wp_data

Deploy containers

Deploy using Docker Stack

If you are familiar with Kubernetes (kubectl), this is a very similar process as a deployment.

To deploy the stack defined in your docker-compose.yml file:

docker stack deploy --compose-file=docker-compose.yml wordpress
# Creating network wordpress_mysql_private
# Creating service wordpress_wordpress
# Creating service wordpress_db

*NOTE: After you run the deploy command, you may want to list running containers (and keep doing so) until all of the containers show up as running.

Update stack deployment

If the docker-compose.yml file is updated, just run the same command from above to update the existing deployment.

Access the web server

Now, you can head over to http://serverIP:8000, and if everyhting went ok then you should be presented with a WordPress setup page!

Useful Commands

List running containers

docker container ls

List docker volumes

docker volume ls

List deployments

docker stack ls
# Removing service wordpress_db
# Removing service wordpress_wordpress
# Removing network wordpress_mysql_private

Remove deployment

docker stack rm wordpress
# wordpress

Attributions

Allan MacGregor at earthly.dev for the epic help with docker secrets with WordPress James Walker at cloudsavvyit.com for more help with docker secrets