Role: docker¶

Installs Docker CE and the Compose plugin. Optionally deploys a custom daemon.json.

Hosts: arrstack, nginx

Tasks¶

Task	Tag
Install prerequisites (ca-certificates, curl, gnupg)	`docker`, `install`
Add Docker GPG key	`docker`, `install`
Add Docker apt repository	`docker`, `install`
Install docker-ce, docker-ce-cli, containerd.io, docker-compose-plugin	`docker`, `install`
Deploy `daemon.json` (if `docker_daemon_config` is defined)	`docker`, `config`
Enable Docker service at boot	`docker`, `install`
Add Ansible user to `docker` group	`docker`, `install`

Variable	Source	Notes
`docker_daemon_config`	host_vars	Dict written to `/etc/docker/daemon.json`. Optional.

docker_daemon_config:
  log-driver: "json-file"
  log-opts:
    max-size: "10m"
    max-file: "3"
  storage-driver: "overlay2"

nginx has no docker_daemon_config set — Docker runs with defaults.

daemon.json.j2 — Renders the docker_daemon_config dict as JSON to /etc/docker/daemon.json