main.yml

---
- name: "Rolling Update For ASG"
  hosts: localhost
  vars_files:
    - app.vars
  tasks:
  
    - name: "Installing pip"
      yum:
        name: pip
        state: present
    
    - name: "Installing boto3"
      pip:
        name: boto3
        state: present
    
    - name: "Fetching Ec2 ASG Details"
      ec2_instance_info:
        region: "{{region}}"
        filters: 
          "tag:aws:autoscaling:groupName": "{{tag_name}}"
          instance-state-name: ["running"]
      register: asg_instances
    
    - debug: var=asg_instances
    
    - name: "Dynamic Inventory For Autosclaing Ec2"
      add_host: 
        name: "{{item.public_ip_address}}"
        groups: "asg"
        ansible_host: "{{item.public_ip_address}}" 
        ansible_port: 22
        ansible_user: "ec2-user"
        ansible_ssh_private_key_file: "{{private_key}}"
        ansible_ssh_common_args: "-o StrictHostKeyChecking=no"
      with_items:
        - "{{asg_instances.instances}}"
    
- name: "Deploying Website From GitHub to ASG"
  become: true
  hosts: asg
  gather_facts: false
  serial: 1
  vars_files:
    - app.vars
  tasks:
    - name: "Installing the Git Packages"
      yum:
        name: 
          - httpd
          - git
        state: latest
    
    - name: "Creating the Clone Directory"
      file:
        path: "{{clonDir}}"
        state: directory
    
    - name: "Cloning the Git Repository"
      git:
        repo: "{{gitRepository}}"
        dest: "{{clonDir}}"
      register: clone_status

    - name: "Disabling Health Check"
      when: clone_status.changed
      file:
        path: /var/www/html/health.txt
        state: file
        mode: 000
    
    - name: "Offloading Ec2 Instance"
      when: clone_status.changed
      pause: 
        seconds: "{{health_time}}"
        prompt: "Please Hold on off loading Is going On"

    - name: "Copying the contents from the Clone Directory to Ec2 Instances"
      when: clone_status.changed
      copy:
        src: "{{clonDir}}"
        dest: /var/www/html/
        remote_src: true
    
    - name: "Restarting/Enabling httpd"
      when: clone_status.changed
      service:
        name: httpd
        state: restarted
        enabled: true
    
    - name: "Enabling the Health Check"
      when: clone_status.changed
      file:
        path: /var/www/html/health.txt
        state: file
        mode: 0644

    - name: "Loading Back the Ec2 instance"
      when: clone_status.changed
      pause:
        seconds: "{{health_time}}"
        prompt: "Please hold on Loading back the Ec2 Instance"