🚚 Migrate docker_host role to external project

We used a similar local role here, in the Freifunk Magdeburg project,
and in personal playbooks.  That was moved to an external project,
unified, and reworked, so the external role can act as replacement for
the distributed, redundant copies.

Link: https://github.com/netz39/ansible-role-host-docker

group-docker_host.yml

@@ -3,7 +3,7 @@
   become: true
 
   roles:
-    - role: docker_setup
+    - role: netz39.host_docker
 
 - hosts: docker_host:&location_space
   become: true

host-krypton.yml

@@ -19,7 +19,7 @@
 
 
   roles:
-    # role 'docker_setup' applied through group 'docker_host'
+    # role 'netz39.host_docker' applied through group 'docker_host'
     - role: apache
     - role: apache_letsencrypt  # Uses configuration from dehydrated setup
     - role: 24367dfa.dehydrated

host-pottwal.yml

@@ -3,7 +3,7 @@
   become: true
 
   roles:
-    # role 'docker_setup' applied through group 'docker_host'
+    # role 'netz39.host_docker' applied through group 'docker_host'
     - role: apache
     - role: apache_letsencrypt  # Uses configuration from dehydrated setup
     - role: 24367dfa.dehydrated

host-radon.yml

@@ -21,7 +21,7 @@
     brotherql_host_port: 9004
 
   roles:
-    # role 'docker_setup' applied through group 'docker_host'
+    # role 'netz39.host_docker' applied through group 'docker_host'
     - role: apache
     - role: apache_letsencrypt  # Uses configuration from dehydrated setup
     - role: 24367dfa.dehydrated

host-tau.yml

@@ -19,7 +19,7 @@
     discord_invite_domain: discord.netz39.de
 
   roles:
-    # role 'docker_setup' applied through group 'docker_host'
+    # role 'netz39.host_docker' applied through group 'docker_host'
     - role: apache
     - role: penguineer.dehydrated_cron
 

host-unicorn.yml

@@ -7,7 +7,7 @@
     data_dir: "/srv/data"
 
   roles:
-    # role 'docker_setup' applied through group 'docker_host'
+    # role 'netz39.host_docker' applied through group 'docker_host'
 
   tasks:
     - name: Setup the docker container for unifi-controller

host-wittgenstein.yml

@@ -3,7 +3,7 @@
   become: true
 
   roles:
-    - role: docker_setup
+    - role: netz39.host_docker
       vars:
         docker_data_root: "/srv/docker"
     - role: apache

requirements.yml

@@ -16,6 +16,9 @@ roles:
     version: v1.1.0
   - src: lespocky.telegraf_docker_in_docker
     version: v0.2.1
+  - name: netz39.host_docker
+    src: git+https://github.com/netz39/ansible-role-host-docker.git
+    version: v0.3.0
 
 collections:
   - name: community.grafana

roles/docker_setup/defaults/main.yml

@@ -1,5 +0,0 @@
----
-docker_compose_version: "1.25.4"
-docker_compose_path: /usr/local/bin/docker-compose
-docker_data_root: "/var/lib/docker"
-docker_storage_driver: "overlay2"

roles/docker_setup/handlers/main.yml

@@ -1,6 +0,0 @@
----
-- name: restart docker
-  service:
-    name: docker
-    state: restarted
-    enabled: yes

roles/docker_setup/tasks/main.yml

@@ -1,91 +0,0 @@
-# This file is a mash-up of:
-#   https://github.com/geerlingguy/ansible-role-docker/blob/master/tasks/docker-compose.yml
-#   https://www.digitalocean.com/community/tutorials/how-to-install-docker-compose-on-debian-9
-#   and our own stuff …
----
-- name: Gather package facts
-  package_facts:
-    manager: "auto"
-
-- name: Exit if docker.io is installed
-  fail:
-    msg: "Please remove docker.io (Debian vanilla docker package) first!"
-  when: "'docker.io' in ansible_facts.packages"
-
-- name: Install Docker APT deps
-  package:
-    name: "{{ packages }}"
-    state: present
-  vars:
-    packages:
-      - apt-transport-https
-      - ca-certificates
-      - gnupg2
-      - software-properties-common
-
-- name: add Docker apt-key
-  apt_key:
-    url: https://download.docker.com/linux/debian/gpg
-    state: present
-
-- name: add Docker's APT repository
-  ansible.builtin.template:
-    src: templates/docker.list.j2
-    dest: /etc/apt/sources.list.d/docker.list
-  register: apt_repo
-
-- name: Update package cache  # noqa: no-handler
-  ansible.builtin.apt:
-    update_cache: true
-  when: apt_repo.changed
-
-- name: install Docker
-  package:
-    name: "{{ packages }}"
-    state: present
-  vars:
-    packages:
-      - docker-ce
-      - python3-docker
-
-- name: Set docker configuration
-  template:
-    src: templates/daemon.json.j2
-    dest: /etc/docker/daemon.json
-    mode: "0644"
-  notify: restart docker
-
-- name: Check current docker-compose version.
-  command: docker-compose --version
-  register: docker_compose_current_version
-  changed_when: false
-  failed_when: false
-
-- name: Delete existing docker-compose version if it's different.
-  file:
-    path: "{{ docker_compose_path }}"
-    state: absent
-  when: >
-    docker_compose_current_version.stdout is defined
-    and docker_compose_version not in docker_compose_current_version.stdout
-
-- name: Install Docker Compose (if configured).
-  get_url:
-    url: https://github.com/docker/compose/releases/download/{{ docker_compose_version }}/docker-compose-Linux-x86_64
-    dest: "{{ docker_compose_path }}"
-    mode: "0755"
-
-- name: Place admin users in docker group
-  user:
-    name: "{{ item.logname }}"
-    groups: [docker]
-    append: yes
-  when: item.docker
-  with_items: "{{ users }}"
-
-- name: Ensure that docker image prune cron job is present.
-  ansible.builtin.cron:
-    name: docker image prune
-    special_time: weekly
-    user: root
-    job: "docker image prune --all --force"

roles/docker_setup/templates/daemon.json.j2

@@ -1,9 +0,0 @@
-{
-    "exec-opts": ["native.cgroupdriver=systemd"],
-    "log-driver": "json-file",
-        "log-opts": {
-            "max-size": "100m"
-        },
-    "data-root": "{{ docker_data_root }}",
-    "storage-driver": "{{ docker_storage_driver }}"
-}

roles/docker_setup/templates/docker.list.j2

@@ -1,2 +0,0 @@
-deb https://download.docker.com/linux/debian {{ ansible_distribution_release }} stable
-