Traefik reverse-proxy Ansible role

This is an Ansible role which installs Traefik to run as a Docker container wrapped in a systemd service.

This role implicitly depends on the com.devture.ansible.role.systemd_docker_base role.

Usage

Example playbook:

- hosts: servers
  roles:
    - role: galaxy/com.devture.ansible.role.systemd_docker_base

    - role: galaxy/com.devture.ansible.role.traefik

    - role: another_role

Example playbook configuration (group_vars/servers or other):

devture_traefik_container_network: "{{ my_container_network }}"

devture_traefik_uid: "{{ my_uid }}"
devture_traefik_gid: "{{ my_gid }}"

Security hardening

To avoid the Traefik container from mounting and using the Docker UNIX socket (/var/run/docker.sock) directly, you can also make it talk to the Docker API via TCP using Tecnativa/docker-socket-proxy. The Traefik container can then run with reduced privileges (non-root user, dropped capabilities, etc).

To get this socket proxy installed, you can use the com.devture.ansible.role.container_socket_proxy role.

Here's some example configuration (e.g. group_vars/servers) which optionally wires them together:

#
# Container Socket Proxy role configuration
#
devture_container_socket_proxy_enabled: true

devture_container_socket_proxy_uid: "{{ my_uid }}"
devture_container_socket_proxy_gid: "{{ my_gid }}"

# Traefik requires read access to the containers APIs to do its job
devture_container_socket_proxy_api_containers_enabled: true

#
# Traefik role configuration
#

# Base Traefik configuration here (see above).

devture_traefik_config_providers_docker_endpoint: "{{ devture_container_socket_proxy_endpoint if devture_container_socket_proxy_enabled else 'unix:///var/run/docker.sock' }}"

devture_traefik_container_additional_networks: |
  {{
    ([devture_container_socket_proxy_container_network] if devture_container_socket_proxy_enabled else [])
  }}

devture_traefik_systemd_required_services_list: |
  {{
    (['docker.service'])
    +
    ([devture_container_socket_proxy_identifier + '.service'] if devture_container_socket_proxy_enabled else [])
  }}