Add roles within the playbook

Author: KithupaG

.ansible/deploy-docker-with-roles.yaml

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+---
+- name: Install Docker
+  hosts: tag_Role_docker_server
+  become: yes
+  become_user: root
+  tasks:
+    - roles:
+      - install_docker
+
+- name: Install docker compose
+  hosts: tag_Role_docker_server
+  become: yes
+  become_user: kithupag
+  tasks:
+    - name: Create docker compose directory
+      file:
+        path: ~/.docker/cli-plugins
+        state: directory
+
+    - name: Get architecture
+      shell: uname -m
+      register: architecture
+
+    - name: Download docker compose
+      get_url:
+        url: https://github.com/docker/compose/releases/latest/download/docker-compose-linux-{{ architecture.stdout }}
+        dest: ~/.docker/cli-plugins/docker-compose
+        mode: +x
+
+- name: Start docker
+  hosts: tag_Role_docker_server
+  become: yes
+  become_user: root
+  tasks:
+    - name: Ensure docker is running
+      systemd:
+        name: docker
+        state: started
+        enabled: yes
+
+    - name: Add kithupag to docker group
+      user:
+        name: kithupag
+        groups: docker
+        append: yes
+
+- name: Deploy application
+  hosts: tag_Role_docker_server
+  become: yes
+  become_user: kithupag
+  vars:
+    image_tag: "{{ image_tag | default('latest') }}"
+    dockerhub_username: "{{ dockerhub_username }}"
+    app_dir: ~/task-manager
+  tasks:
+    - name: Create app directory
+      file:
+        path: "{{ app_dir }}"
+        state: directory
+
+    - name: Write docker-compose file
+      copy:
+        dest: "{{ app_dir }}/docker-compose.yaml"
+        content: |
+          version: "3.8"
+          services:
+            client:
+              image: {{ dockerhub_username }}/task-manager-client:{{ image_tag }}
+              ports:
+                - "80:80"
+              restart: unless-stopped
+              depends_on:
+                - server
+
+            server:
+              image: {{ dockerhub_username }}/task-manager-server:{{ image_tag }}
+              ports:
+                - "3000:3000"
+              restart: unless-stopped
+              env_file:
+                - .env
+
+    - name: Copy .env file to app directory
+      copy:
+        src: .env
+        dest: "{{ app_dir }}/.env"
+        mode: '0600'
+      ignore_errors: yes  # skip if no .env exists locally
+
+    - name: Pull latest images
+      shell: docker compose pull
+      args:
+        chdir: "{{ app_dir }}"
+
+    - name: Stop existing containers
+      shell: docker compose down --remove-orphans
+      args:
+        chdir: "{{ app_dir }}"
+      ignore_errors: yes
+
+    - roles:
+      - start_containers
+
+    - name: Verify containers are running
+      shell: docker compose ps
+      args:
+        chdir: "{{ app_dir }}"
+      register: compose_status
+
+    - name: Print container status
+      debug:
+        msg: "{{ compose_status.stdout }}"

.ansible/roles/install_docker/tasks/main.yaml

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+- name: Make sure docker is installed
+  yum:
+    name: docker
+    state: present
+    update_cache: yes

.ansible/roles/start_containers/tasks/files/docker-compose.yaml

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+services:
+  db:
+    image: postgres:16-alpine
+    container_name: todo-db
+    restart: always
+    environment:
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: PASSWORD
+      POSTGRES_DB: todo_db
+    volumes:
+      - db-data:/var/lib/postgresql/data
+      - ./database.sql:/docker-entrypoint-initdb.d/init.sql
+    ports:
+      - "5432:5432"
+    healthcheck:
+      test: ["CMD", "pg_isready", "-U", "postgres"]
+      interval: 10s
+      timeout: 10s
+      retries: 3
+      start_period: 10s
+
+  backend:
+    image: kithupag/server:latest
+    container_name: todo-backend
+    restart: always
+    depends_on:
+            db:
+              condition: service_healthy
+    environment:
+      DB_HOST: db
+      DB_USER: postgres
+      DB_PASSWORD: PASSWORD
+      DB_NAME: todo_db
+    ports:
+      - "5000:5000"
+    healthcheck:
+      test: ["CMD-SHELL", "curl -f http://localhost:5000/api/todos || exit 1"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 30s
+
+  frontend:
+    image: kithupag/client:latest
+    container_name: todo-frontend
+    restart: always
+    depends_on:
+      - backend
+    ports:
+      - "80:80"
+    healthcheck:
+      test: ["CMD-SHELL", "curl -f http:/localhost || exit 1"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+
+volumes:
+  db-data:

.ansible/roles/start_containers/tasks/main.yaml

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+- name: Start containers
+  shell: docker compose up -d
+  args:
+    chdir: "{{ app_dir }}"