我正在尝试列出不同标签键的标签值上的实例,例如>一个标签键-环境,其他标签键-角色。我的代码如下:
import argparse
import boto3
AWS_ACCESS_KEY_ID = '<Access Key>'
AWS_SECRET_ACCESS_KEY = '<Secret Key>'
def get_ec2_instances(Env,Role):
ec2 = boto3.client("ec2", region)
reservations = ec2.describe_instances(Filters={"tag:environment" : Env, "tag:role" : Role})
for reservation in reservations["Reservations"] :
for instance in reservation["Instances"]:
print "%s" % (instance.tags['Name'])
if __name__ == '__main__':
regions = ['us-east-1','us-west-1','us-west-2','eu-west-1','sa-east-1',
'ap-southeast-1','ap-southeast-2','ap-northeast-1']
parser = argparse.ArgumentParser()
parser.add_argument('Env', default="environment", help='value for tag:environment');
parser.add_argument('Role', default="role", help='value for tag:role');
args = parser.parse_args()
for region in regions: get_ec2_instances(args.Env, args.Role)
运行此脚本后:python script.py arg1 arg2
我收到以下错误
Traceback (most recent call last):
File "script.py", line 27, in <module>
for region in regions: get_ec2_instances(args.Env, args.Role)
File "script.py", line 10, in get_ec2_instances
reservations = ec2.describe_instances(Filters={"tag:environment" : Env, "tag:role" : Role})
File "/usr/local/lib/python2.7/dist-packages/botocore/client.py", line 258, in _api_call
return self._make_api_call(operation_name, kwargs)
File "/usr/local/lib/python2.7/dist-packages/botocore/client.py", line 524, in _make_api_call
api_params, operation_model, context=request_context)
File "/usr/local/lib/python2.7/dist-packages/botocore/client.py", line 577, in _convert_to_request_dict
api_params, operation_model)
File "/usr/local/lib/python2.7/dist-packages/botocore/validate.py", line 270, in serialize_to_request
raise ParamValidationError(report=report.generate_report())
botocore.exceptions.ParamValidationError: Parameter validation failed:
Invalid type for parameter Filters, value: {'tag:role': 'arg1', 'tag:environment': 'arg2'}, type: <type 'dict'>, valid types: <type 'list'>, <type 'tuple'>
这看起来很熟悉,我是否在某处为某人修改过此;-)。实际上,我编写的代码很匆忙,并且没有经过正确的测试(而且我不会费心修改%字符串格式并将其替换为str.format())。实际上,在AWS中未正确记录使用Filters参数的信息。
请参阅Russell Ballestrini博客,使用Boto3过滤AWS资源,以了解有关正确的boto过滤器方法的更多信息。
[{"tag:keyname","Values": [""] }]
,却行不通。(实际上,我假设原始代码是开发人员知道过滤器是如何工作的,因此我只修改了结构)。[{"Name" :"tag:keyname", "Values":[""] }]
。这很棘手。因此,如果要用于示例,则是设置过滤器格式的正确方法
filters = [{'Name':'tag:environment', 'Values':[Env]},
{'Name':'tag:role', 'Values':[Role]}
]
(更新)并确保argparse接受字符串值,您只需强制参数接受字符串值
parser.add_argument('Env', type=str, default="environment",
help='value for tag:environment');
parser.add_argument('Role', type=str,default="role",
help='value for tag:role');
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我来说两句