Refactor Docker variable structure

tasks/main.yaml

@@ -0,0 +1,21 @@
+---
+
+- name: Ensure prerequisite packages are installed
+  include_tasks: prereqs.yaml
+
+- name: Install apt repository
+  include_tasks: repo.yaml
+
+- name: Install the latest docker-ce packages
+  ansible.builtin.apt:
+    name: "{{ item }}"
+    state: latest
+    update_cache: yes
+  with_items:
+    - docker-ce
+    - docker-ce-cli
+    - containerd.io
+    - docker-compose-plugin
+
+- name: Include PostgreSQL multiple databases patch
+  include_tasks: postgresql_multiple_dbs.yml

tasks/postgresql_multiple_dbs.yml

@@ -0,0 +1,9 @@
+---
+- name: Copy script file for multiple PostgreSQL databases
+  ansible.builtin.copy:
+    src: "docker-postgresql-multiple-databases/\
+          create-multiple-postgresql-databases.sh"
+    dest: "{{ appdata_path }}/postgresql/\
+           docker-postgresql-multiple-databases/\
+           create-multiple-postgresql-databases.sh"
+    mode: 0755

tasks/prereqs.yaml

@@ -0,0 +1,12 @@
+---
+
+- name: Ensure prerequisite packages are installed
+  ansible.builtin.apt:
+    name: "{{ item }}"
+    state: latest
+    update_cache: yes
+  with_items:
+    - ca-certificates
+    - curl
+    - gnupg
+    - lsb-release

tasks/repo.yaml

@@ -0,0 +1,33 @@
+---
+
+- name: Ensure apt keyrings directory exists
+  ansible.builtin.file:
+    path: /etc/apt/keyrings
+    state: directory
+    mode: 0755
+    group: root
+    owner: root
+
+- name: Download the Docker key
+  ansible.builtin.shell:
+    cmd: curl -fsSL https://download.docker.com/linux/debian/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
+    creates: /etc/apt/keyrings/docker.gpg
+  args:
+    warn: no
+  register: cmd_output
+
+    #- name: Debug key download
+    #  ansible.builtin.debug:
+    #    var: cmd_output
+
+- name: Create the repository file
+  ansible.builtin.shell:
+    cmd: echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/debian $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
+    creates: /etc/apt/sources.list.d/docker.list
+  args:
+    warn: no
+  register: cmd_output
+
+    #- name: Debug repo file
+    #  ansible.builtin.debug:
+    #    var: cmd_output