The ansible script to find ec2 instances with certain tags and terminate them. Does not uses ec2 dynamic inventory script.

terminate_ec2_with_tags.yml

---
- name: Terminate EC2 instances
  hosts: localhost
  connection: local
  gather_facts: no
  
  vars:
    aws_region: "eu-west-1"
    ec2_tags:
      Name: "Test Server"
      Type: "API"
      
  tasks:
    - name: Find EC2 Facts
      ec2_remote_facts:
        region: "{{ aws_region }}"
      register: ec2_facts

      # (-) is used to stip white spaces
      # http://jinja.pocoo.org/docs/dev/templates/#whitespace-control
    - name: Filter EC2 instances
      set_fact:
        ec2_instances: |
          {% set instances = [] %}
          {% for item in ec2_facts.instances if item.tags == ec2_tags and item.state == 'running' -%}
            {{ instances.append(item.id) }}
          {%- endfor %}
          {{ instances }}

    - name: Terminate EC2 server
      ec2:
        region: "{{ aws_region }}"
        instance_ids: "{{ item }}"
        state: 'absent'
      with_items: "{{ ec2_instances }}"

This script was written a long time back. But its still working for me. Did you update the vars to reflect your environment?

The Filter EC2 instances task not required anymore, ec2_remote_facts now supports filtering.

As with latest version of ansible this is working for me searching by the Name tag but could be any key.

    ec2_instance_facts:
      region: "{{ region }}"
      filters:
        "tag:Name": "{{ ec2_tag_name }}"
    register: ec2_list

They have renamed facts to info.

- name: collect list of node instances
  amazon.aws.ec2_instance_info:
    region: "{{ region }}"
    filters:
      "tag:Role": "node"
      "tag:Vpc": "{{ vpc_name }}"
  register: ec2_list