Role Docker

Role: Docker

Installs Docker CE and all related tooling on the NAS.

What It Does

1. Installs prerequisites (ca-certificates, curl, gnupg)
2. Adds the official Docker GPG key and APT repository
3. Installs Docker CE, CLI, containerd, and Compose plugin

Packages Installed

Package	Purpose
docker-ce	Docker daemon
docker-ce-cli	Docker CLI
containerd.io	Container runtime
docker-compose	Legacy Compose (v1)
docker-compose-plugin	Modern Compose (v2, docker compose)

Why Both Compose Versions?

The docker-compose (v1) package is included for backwards compatibility with any scripts that reference it. The docker-compose-plugin (v2) is what the container deployment workflow actually uses (docker compose up -d).

User Access

The provisioning playbook adds specified users to the docker group (defined in group_vars), so they can run Docker commands without sudo.

🔗 Install Docker Engine on Ubuntu | Post-installation steps