Lambda函数检查特定标签是否不存在-​​python

我正在尝试以下内容：

获取满足以下任一条件的所有 EC2 实例：

1. 被标记为标签所有者和值未知或未知
2. 缺少标签所有者

我能够完成 1) 但不知道如何实现 2)

import boto3   
import collections     
import datetime     
import time     
import sys 

ec = boto3.client('ec2', 'eu-west-1')     
ec2 = boto3.resource('ec2', 'eu-west-1')     


def lambda_handler(event, context):           
    instance_ids = []
    reservations = ec.describe_instances(     
        Filters=[     
            {'Name': 'tag:Owner', 'Values': ['Unknown', 'unknown']},     
        ]     
    ).get('Reservations', []) 

    for reservation in reservations:
          instances = reservation['Instances']
          for instance in instances:
              instance_ids.append(instance['InstanceId'])

    print("Stopping instances: {}".format(','.join(instance_ids)))

就像我在评论中说的，你想放弃Owner过滤，以便您的响应也包含没有所有者标签的实例，然后您可以在本地进行过滤。

reservations = ec.describe_instances().get('Reservations', [])
for reservation in reservations:
    for instance in reservation['Instances']:
        tags = {}
        for tag in instance['Tags']:
            tags[tag['Key']] = tag['Value']

        if not 'Owner' in tags:
            print instance['InstanceId'] + " does not have Owner tag"
        elif tags['Owner'] in ['Unknown', 'unknown']:
            print instance['InstanceId'] + " has [U|u]nknown Owner tag"

如果您的帐户中有大量实例，对describe_instances 的响应可能会分页，您也必须处理这个问题。