def check_alarm_tag()

in src/actions.py [0:0]

• 35 lines of code
• 5 McCabe index (conditional complexity)

def check_alarm_tag(instance_id, tag_key):
    try:
        ec2_client = boto3_client('ec2')
        # does instance have appropriate alarm tag?
        instance = ec2_client.describe_instances(
            Filters=[
                {
                    'Name': 'tag-key',
                    'Values': [
                        tag_key
                    ]
                }
            ],
            InstanceIds=[
                instance_id
            ]

        )
        # can only be one instance when called by CloudWatch Events
        if 'Reservations' in instance and len(instance['Reservations']) > 0 and len(
                instance['Reservations'][0]['Instances']) > 0:
            ec2_client.create_tags(
                Resources=[
                    instance_id
                ],
                Tags=[
                    {
                        'Key': tag_key,
                        'Value': str(datetime.utcnow())
                    }
                ]
            )
            return instance['Reservations'][0]['Instances'][0]
        else:
            return False

    except Exception as e:
        # If any other exceptions which we didn't expect are raised
        # then fail and log the exception message.
        logger.error('Failure describing instance {} with tag key: {} : {}'.format(instance_id, tag_key, e))
        raise