python - Boto3云信息错误: Template format error: unsupported structure

Question

我无法将参数加载到 python boto3 Cloudformation 客户端中。

下面是我的参数文件:

[
  {"ParameterKey": "pVpcId",   "ParameterValue": "vpc-XXXXXX"},
  {"ParameterKey": "pContact", "ParameterValue": "XDXDXX"},
  {"ParameterKey": "pCC",      "ParameterValue": "XXXXX" },
  {"ParameterKey": "pFormat",  "ParameterValue": "True"}
]

我通过以下方式将其加载到程序中:

    with open(parameter_file, 'r') as infile:
        parameters=ast.literal_eval(infile.read())
        client = boto3.client('cloudformation',aws_access_key_id=access_key,aws_secret_access_key=secret_key,aws_session_token=session_token,region_name=region)

        response = client.create_stack(
            StackName=stack_name,
            TemplateURL=stack_url,
            Parameters=parameters
        )

当我使用 Cloudformation 建立 boto3 客户端并调用它时，出现如下错误。该调用无需参数即可工作，因此肯定与参数文件有关。

    Traceback (most recent call last):
    File "cf_create_stack", line 85, in <module>
        Parameters=parameters
    File "/usr/lib/python2.7/site-packages/botocore/client.py", line 357, in _api_call
        return self._make_api_call(operation_name, kwargs)
    File "/usr/lib/python2.7/site-packages/botocore/client.py", line 661, in _make_api_call
        raise error_class(parsed_response, operation_name)
    botocore.exceptions.ClientError: An error occurred (ValidationError) when calling the CreateStack operation: Template format error: unsupported structure.

Answer 1

因此 TemplateBody 参数需要 CloudFormation 模板文件的内容/str，而不仅仅是文件名。

以下内容应该可以令人满意地工作。

cf_template = open('batch-job-cft.yml').read()
cf_client.create_stack(StackName='Batch Job', TemplateBody=cf_template)

# OR

# Optimal usage would be as below
with open('batch-job-cft.yml', 'r') as cf_file:
    cft_template = cf_file.read()
    cf_client.create_stack(StackName='Batch Job', TemplateBody=cft_template)