Run WordPress on Ubuntu using Terraform, Ansible and Docker

Using Anible to install Docker

I’ve found an easy way to deploy WordPress using Docker. However, installing Docker manually is an error-prone pain. I wanted to find an easier and more reliable/consistent way to to it.

Using Ansible and Jeff Geerling’s excellent Ansible Galaxy playbook for this worked reall.y well.

On a separate machine that I had configured to be an Ansible Control node, I ran this to install the Galaxy Docker playbook:

ansible-galaxy install geerlingguy.docker

Then, I created a simple Ansible Inventory file entry to reference the VM on which I’d ultimately install WordPress:

[wordpress-servers]
wordpress.test.local

Next, I defined a simple playbook to perform the work of installing Docker on the WordPress VM:

---
    - hosts: wordpress-servers
      become: true
    
      vars:
        docker_install_compose: true
        docker_compose_version: "1.24.1"
        docker_compose_path: /usr/local/bin/docker-compose
        docker_apt_release_channel: stable
        docker_apt_arch: amd64
        docker_apt_repository: "deb [arch={{ docker_apt_arch }}] https://download.docker.com/linux/{{ ansible_distribution|lower }} {{ ansible_distribution_release }} {{ docker_apt_release_channel }}"
        docker_apt_ignore_key_error: True
    
      roles:
        - geerlingguy.docker

Executing this playbook was extremely simple:

ansible-playbook -K -i hosts wordpress.yml

The result was that Ansible remotely installed Docker on the target host without a hitch. Pretty neat!

Once complete, I SSH’ed into the WordPress VM. For convenience, I added my account to the Docker group so that I could run Docker commands without sudo:

sudo usermod -aG docker $USER

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