How to display AWS autoscaling group name using ansible?

Question

I was writing Ansible playbook to display the auto scaling group of AWS based on tags and below is my playbook.

- name: Find the green asg with matching tags
  ec2_asg_info:
    tags:
      service_name: cps_wallet
      Environment: "{{ name_env }}"
      service_state: green
  register: asgs_payment

- name: Show the ASG Payment name
  debug: 
    msg: "{{ asgs_payment.results[0].auto_scaling_group_name}}"

- set_fact:
    asg_payment_name: "{{ asgs_payment.results[0].auto_scaling_group_name}}"

I was running it on Jenkins and I was getting error

fatal: [127.0.18.34]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: list object has no element 0\n\nThe error appears to be in '/opt/software/jenkins/workspace/payment-react-ui/srv/payment-ui-110/payment-ui/roles/inspect/tasks/cps_green_deploy.yml': line 9, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n- name: Show the ASG Payment name\n ^ here\n"}

I thought the result doesn't have any asg name so i updated the above code as

- name: Find the green asg with matching tags
  ec2_asg_info:
    tags:
      service_name: cps_wallet
      Environment: "{{ name_env }}"
      service_state: green
  register: asgs_payment

- name: Show the ASG Payment name
  debug:
    msg: "{{ asgs_payment}}"

- set_fact:
    asg_payment_name: "{{ asgs_payment}}"

It didn't give me any error, but the result was empty.

"msg": { "changed": false,  "failed": false,  "results": [] }

I do have tags added in my ASG as you can see below. And there is no other asg with same tags Tags image

The same playbook works like a charm for my other applications

Answer 1

this works for me

- name: Display Auto Scaling group name
  ec2_asg_info:
    region: us-east-1
    name: my-asg
  register: asg_info

- debug:
    msg: "Auto Scaling group name: {{ asg_info.auto_scaling_groups[0].name }}"

EDIT:

here is a template of playbook

---
- name: Display Auto Scaling group of AWS instance
  hosts: localhost
  gather_facts: false
  tasks:
    - name: Get instance information
      ec2_instance_info:
        region: us-east-1
        filters:
          "tag:Name": "my-instance"
      register: instance_info

    - name: Get Auto Scaling group information
      ec2_asg_info:
        region: us-east-1
        name: "{{ instance_info.instances[0].asg_name }}"
      register: asg_info

    - name: Display Auto Scaling group name
      debug:
        msg: "Auto Scaling group name: {{ asg_info.auto_scaling_groups[0].name }}"

the ec2_instance_info module is used to retrieve information about the instance with the tag Name set to "my-instance" in the us-east-1 region. The ec2_asg_info module is then used to retrieve information about the Auto Scaling group that the instance belongs to, using the asg_name attribute of the instance. Finally, the debug module is used to display the name of the Auto Scaling group.

You can modify this