Show the details from QingCloud concerning an instance.

    CLI Examples:

    .. code-block:: bash

        salt-cloud -a show_instance i-2f733r5n

def show_instance(instance_id, call=None, kwargs=None):
    '''
    Show the details from QingCloud concerning an instance.

    CLI Examples:

    .. code-block:: bash

        salt-cloud -a show_instance i-2f733r5n
    '''
    if call != 'action':
        raise SaltCloudSystemExit(
            'The show_instance action must be called with -a or --action.'
        )

    params = {
        'action': 'DescribeInstances',
        'instances.1': instance_id,
        'zone': _get_specified_zone(kwargs=None, provider=get_configured_provider()),
    }
    items = query(params=params)

    if items['total_count'] == 0:
        raise SaltCloudNotFound(
            'The specified instance, \'{0}\', could not be found.'.format(instance_id)
        )

    full_node = items['instance_set'][0]
    normalized_node = _show_normalized_node(full_node)
    full_node.update(normalized_node)

    result = full_node

    return result