def process_describe_instances()

in netbench-cdk/netbench-monitor/handler.py [0:0]

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

def process_describe_instances(response: dict) -> dict:
    # Walk the running instance list checking the age of the disk mount
    # against MAX_LIFETIME
    instance_above_max: dict[str, int] = {}
    instance_below_max: dict[str, int] = {}
    alarm: bool = False
    for group in response['Reservations']:
        instance = group['Instances'][0]
        # If this is missing, skip this instance
        # this should never happen in the running state.
        if 'BlockDeviceMappings' not in instance:
            raise ValueError("Missing expected field BlockDeviceMapping; "
                             + "running instances should have at least one "
                             + "block device attached.")
        if len(instance['BlockDeviceMappings']) > 0:
            age = get_ebs_age(instance['BlockDeviceMappings'][0]['Ebs']['AttachTime'])
            if age > MAX_LIFETIME:
                alarm = True
                instance_above_max[instance['InstanceId']] = age
            else:
                instance_below_max[instance['InstanceId']] = age
        else:
            continue
    return {"alarm_threshold": MAX_LIFETIME, 
            "overall_alarm": alarm, 
            "instances_below_max": instance_below_max, 
            "instances_above_max": instance_above_max }