feat: add the possibility to add registry mirrors

roles/base/defaults/main.yml

@@ -7,3 +7,8 @@ docker_compose_base_dir: /etc/docker/compose
 
 # Global docker volume directory configuration
 docker_volume_base_dir: /srv/data
+
+# Docker registry mirror configuration
+# Set to empty list to disable registry mirror
+# Example: docker_registry_mirrors: ["https://mirror.example.com"]
+docker_registry_mirrors: []

roles/base/handlers/main.yml

@@ -1,3 +1,9 @@
 #SPDX-License-Identifier: MIT-0
 ---
 # handlers file for base
+
+- name: restart docker
+  ansible.builtin.systemd:
+    name: docker
+    state: restarted
+  when: ansible_virtualization_type != "docker"

roles/base/tasks/main.yml

@@ -63,6 +63,16 @@
     update_cache: true
   when: ansible_os_family == "Debian"
 
+- name: Configure Docker daemon with registry mirror
+  ansible.builtin.template:
+    src: daemon.json.j2
+    dest: /etc/docker/daemon.json
+    owner: root
+    group: root
+    mode: '0644'
+  notify: restart docker
+  when: ansible_os_family == "Debian"
+
 - name: Start and enable Docker service
   ansible.builtin.systemd:
     name: docker

roles/base/templates/daemon.json.j2

@@ -0,0 +1,5 @@
+{
+{% if docker_registry_mirrors | length > 0 %}
+  "registry-mirrors": {{ docker_registry_mirrors | to_json }}
+{% endif %}
+}