KeyError: 'Description' when deleting transit gateway

[branic]

Summary

I am trying to delete a transit gateway using the ec2_transit_gateway module and receiving a KeyError: 'Description' when the task is executed.

I did find issue #68 that is similar to this and is closed. In this comment it was stated that the Description key should always be returned, However, if the transit gateway is old enough (I don't know what the exact date of "old enough" is) then the Description key is not returned.

As an example I have a transit gateway that was created on 2023-03-03 and there is no Description key, but a transit gateway that was created today (2023-07-21) does have a Description key. Using the AWS CLI (version 2.13.0) to get the information on the transit gateways shows this behavior:

aws ec2 describe-transit-gateways
{
    "TransitGateways": [
        {
            "TransitGatewayId": <<REDACTED>>,
            "TransitGatewayArn": <<REDACTED>>,
            "State": "available",
            "OwnerId": <<REDACTED>>,
            "CreationTime": "2023-03-03T12:06:27+00:00",
            ....
        },
        {
            "TransitGatewayId": <<REDACTED>>,
            "TransitGatewayArn": <<REDACTED>>,
            "State": "deleted",
            "OwnerId": <<REDACTED>>,
            "Description": "",
            "CreationTime": "2023-07-21T22:19:56+00:00",
            ....
        }
    ]
}

Issue Type

Bug Report

Component Name

ec2_transit_gateway

Ansible Version

$ ansible --version
ansible [core 2.14.6]
  config file = /etc/ansible/ansible.cfg
  configured module search path = ['/home/runner/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python3.9/site-packages/ansible
  ansible collection location = /home/runner/.ansible/collections:/usr/share/ansible/collections
  executable location = /usr/bin/ansible
  python version = 3.9.16 (main, May 31 2023, 12:21:58) [GCC 8.5.0 20210514 (Red Hat 8.5.0-18)] (/usr/bin/python3.9)
  jinja version = 3.1.2
  libyaml = True

Collection Versions

$ ansible-galaxy collection list

# /usr/share/ansible/collections/ansible_collections
Collection    Version
------------- -------
amazon.aws    6.2.0  
community.aws 6.1.0  

AWS SDK versions

$ pip show boto boto3 botocore
WARNING: Package(s) not found: boto
Name: boto3
Version: 1.28.7
Summary: The AWS SDK for Python
Home-page: https://github.com/boto/boto3
Author: Amazon Web Services
Author-email: 
License: Apache License 2.0
Location: /usr/local/lib/python3.9/site-packages
Requires: botocore, jmespath, s3transfer
Required-by: 
---
Name: botocore
Version: 1.31.7
Summary: Low-level, data-driven core of boto 3.
Home-page: https://github.com/boto/botocore
Author: Amazon Web Services
Author-email: 
License: Apache License 2.0
Location: /usr/local/lib/python3.9/site-packages
Requires: jmespath, python-dateutil, urllib3
Required-by: boto3, s3transfer

Configuration

$ ansible-config dump --only-changed
CONFIG_FILE() = /etc/ansible/ansible.cfg

OS / Environment

Red Hat Enterprise Linux release 8.8 (Ootpa)

Steps to Reproduce

In an AWS region create a transit gateway that does have a description (e.g. the description field is left blank in the AWS web UI) and then create a playbook with the below tasks (ensure to setup AWS authentication). If the region the transit gateway is created in is different than us-east-1 be sure to update the region in the tasks accordingly.

- name: Get EC2 transit gateway info
  community.aws.ec2_transit_gateway_info:
    region: us-east-1
  register: __aws_ec2_vpcs_tgws

- name: Remove EC2 transit gateways
  community.aws.ec2_transit_gateway:
    transit_gateway_id: "{{ __aws_ec2_vpcs_tgws['transit_gateway_id'] }}"
    region: us-east-1
    state: absent
  loop: "{{ __aws_ec2_vpcs_tgws['transit_gateways'] }}"
  loop_control:
    label: "Removing EC2 transit gateway {{ __aws_ec2_vpcs_tgws['transit_gateway_id'] }}
    loop_var: __aws_ec2_vpcs_tgws

Expected Results

The transit gateway is deleted

Actual Results

The full traceback is:
Traceback (most recent call last):
  File "/home/runner/.ansible/tmp/ansible-tmp-1689979849.497067-582-232165340950257/AnsiballZ_ec2_transit_gateway.py", line 107, in <module>
    _ansiballz_main()
  File "/home/runner/.ansible/tmp/ansible-tmp-1689979849.497067-582-232165340950257/AnsiballZ_ec2_transit_gateway.py", line 99, in _ansiballz_main
    invoke_module(zipped_mod, temp_path, ANSIBALLZ_PARAMS)
  File "/home/runner/.ansible/tmp/ansible-tmp-1689979849.497067-582-232165340950257/AnsiballZ_ec2_transit_gateway.py", line 47, in invoke_module
    runpy.run_module(mod_name='ansible_collections.community.aws.plugins.modules.ec2_transit_gateway', init_globals=dict(_module_fqn='ansible_collections.community.aws.plugins.modules.ec2_transit_gateway', _modlib_path=modlib_path),
  File "/usr/lib64/python3.9/runpy.py", line 225, in run_module
    return _run_module_code(code, init_globals, run_name, mod_spec)
  File "/usr/lib64/python3.9/runpy.py", line 97, in _run_module_code
    _run_code(code, mod_globals, init_globals,
  File "/usr/lib64/python3.9/runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "/tmp/ansible_community.aws.ec2_transit_gateway_payload_gdim_pat/ansible_community.aws.ec2_transit_gateway_payload.zip/ansible_collections/community/aws/plugins/modules/ec2_transit_gateway.py", line 516, in <module>
  File "/tmp/ansible_community.aws.ec2_transit_gateway_payload_gdim_pat/ansible_community.aws.ec2_transit_gateway_payload.zip/ansible_collections/community/aws/plugins/modules/ec2_transit_gateway.py", line 510, in main
  File "/tmp/ansible_community.aws.ec2_transit_gateway_payload_gdim_pat/ansible_community.aws.ec2_transit_gateway_payload.zip/ansible_collections/community/aws/plugins/modules/ec2_transit_gateway.py", line 258, in process
  File "/tmp/ansible_community.aws.ec2_transit_gateway_payload_gdim_pat/ansible_community.aws.ec2_transit_gateway_payload.zip/ansible_collections/community/aws/plugins/modules/ec2_transit_gateway.py", line 454, in ensure_tgw_absent
  File "/tmp/ansible_community.aws.ec2_transit_gateway_payload_gdim_pat/ansible_community.aws.ec2_transit_gateway_payload.zip/ansible_collections/community/aws/plugins/modules/ec2_transit_gateway.py", line 325, in get_matching_tgw
KeyError: 'Description'

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