terminate_eventpost_instances.yml

# Tasks block for terminating eventpost instances in AWS
# Instances are created with a certain tag so they can then be retireved and managed.
- name: Terminate EvenPost instances
  block:
    # Task for getting the desired instances by using their tags,
    - name: Get AWS EvenPost instances
      ec2_instance_info: 
        # Tags 
        filters:
          "tag:Name": ["events", "notifications"]
        # Specify credential
        aws_access_key: "{{aws_access_key_id}}"
        aws_secret_key: "{{aws_secret_access_key}}"
        security_token: "{{aws_session_token}}"
      # Register instances info
      register: old_ec2

    # Task for terminating instances based on their previously adquired IDs.
    - name: Terminate AWS EventPost instances
      ec2: 
        # Specify 'absent' state (it terminates the instances)
        state: absent
        # Specify instances to terminate
        instance_ids: "{{item.instance_id}}"
        region: us-east-1
        aws_access_key: "{{aws_access_key_id}}"
        aws_secret_key: "{{aws_secret_access_key}}"
        security_token: "{{aws_session_token}}"
      with_items:
        - "{{ old_ec2.instances }}"