Docker systemd service

This role lets you configure a docker container and run it as a systemd service on debian-based distributions. This role is heavily sourced from mhutter.docker-systemd-service, but aims at providing some of the missing features of said role.

Requirements

This roles assumes you have docker installed on the target host. You can use ednz_cloud.install_docker to do so.

Role Variables

Service configuration

docker_systemd_service_container_name: "My-Service"

The name that will be assigned to the container.

docker_systemd_service_image: # by default, not defined

The image (and optionally tag) to use for the service.

docker_systemd_service_start: true

Indicates whether the service should start after installation. Defaults to true.

docker_systemd_service_systemd_unit_options: {}

Extra options to add to the [Unit] section of the systemd unit file. Map of strings.

docker_systemd_service_systemd_service_options: {}

Extra options to add to the [Service] section of the systemd unit file. Map of strings.

docker_systemd_service_name: "{{ docker_systemd_service_container_name }}_container"

The name of the systemd service to register.

Container configuration

docker_systemd_service_container_env: {}

A list of key/value pairs, that will be written to the environment file for the container.

docker_systemd_service_container_pull_image: true

Whether or not the role should pull the image during its run, prior to starting the service.

docker_systemd_service_container_pull_force_source: true

If docker_systemd_service_container_pull_image: true, whether the pull you be executed at every run. See docker_image.force_source

docker_systemd_service_flags: []

This variable lets you pass whatever flags you need to the docker run command. It is a list, to which you can add multiple types of flags:

•  - key: value
   # will pass the flag --key "value" to the container.
   Example:
     - network: host
  

•  - simple_key
   # will pass the flag --simple_key to the container.
   Example:
     - privileged
  

•  - key:
       - value1
       - value2
   # will pass the flags --key "value1" --key "value2" to the container.
   Example:
     - volume:
         - /path/on/host:/path/on/container
         - /var/run/docker.sock:/var/run/docker.sock:ro
  
  

Dependencies

None.

Example Playbook

# calling the role inside a playbook with either the default or group_vars/host_vars
- hosts: servers
  roles:
    - ednz_cloud.docker_systemd_service

License

MIT / BSD

Author Information

This role was created by Bertrand Lanson in 2023.