Refactor Docker installation playbook: fix architecture detection

playbooks/install-standard-docker.yml

@@ -1,21 +1,18 @@
 ---
 - name: Install Docker using official Docker documentation steps
-  hosts: all
+  hosts: docker
   become: true
 
   vars:
-    # Path to store Docker's GPG keyring
     docker_keyring_path: /etc/apt/keyrings/docker.asc
-
-    # Path to store the Docker APT source list
     docker_repo_list_path: /etc/apt/sources.list.d/docker.list
 
   tasks:
-    - name: Ensure required packages for Docker APT setup are installed
+    - name: Ensure required packages are installed
       apt:
         name:
-          - ca-certificates # Needed for HTTPS APT repos
-          - curl # Used to download the GPG key
+          - ca-certificates
+          - curl
         state: present
         update_cache: yes
 
@@ -25,25 +22,26 @@
         state: directory
         mode: "0755"
 
-    - name: Download Docker's official GPG key to keyring path
+    - name: Download Docker's official GPG key
       get_url:
         url: https://download.docker.com/linux/ubuntu/gpg
         dest: "{{ docker_keyring_path }}"
         mode: "0644"
+      register: docker_key_download
 
-    # Workaround block:
-    - name: Determine compatible Docker codename (bandage for Ubuntu 24.04 "noble")
-      set_fact:
-        docker_codename: "{{ 'jammy' if ansible_lsb.codename == 'noble' else ansible_lsb.codename }}"
+    - name: Get native architecture (dpkg --print-architecture)
+      command: dpkg --print-architecture
+      register: dpkg_arch_result
+      changed_when: false
 
-    - name: Add Docker APT repository using the compatible codename
+    - name: Add Docker repository to Apt sources
       copy:
         dest: "{{ docker_repo_list_path }}"
         content: |
-          deb [arch={{ ansible_architecture }} signed-by={{ docker_keyring_path }}] https://download.docker.com/linux/ubuntu {{ docker_codename }} stable
+          deb [arch={{ dpkg_arch_result.stdout }} signed-by={{ docker_keyring_path }}] https://download.docker.com/linux/ubuntu {{ ansible_lsb.codename }} stable
       notify: Update apt cache
 
-    - name: Flush handlers to make sure apt cache is updated before install
+    - name: Flush handlers to update apt cache before install
       meta: flush_handlers
 
     - name: Install Docker packages
@@ -55,20 +53,9 @@
           - docker-buildx-plugin # Buildx plugin
           - docker-compose-plugin # Compose v2 plugin
         state: present
-        update_cache: no # Cache is already updated by handler
+        update_cache: no # already handled by handler
 
   handlers:
     - name: Update apt cache
       apt:
         update_cache: yes
-# ------------------------------------------------------------
-# 📝 Optional: Revert this when Docker supports Ubuntu 24.04 natively
-# Just replace the repo setup block with the following:
-
-# - name: Add Docker APT repository using native codename
-#   copy:
-#     dest: "{{ docker_repo_list_path }}"
-#     content: |
-#       deb [arch={{ ansible_architecture }} signed-by={{ docker_keyring_path }}] https://download.docker.com/linux/ubuntu {{ ansible_lsb.codename }} stable
-#   notify: Update apt cache
-# ------------------------------------------------------------