在参数存储中创建参数时出错，该参数存储同一Cloudformation模板中内置的AMI的ImageID

Question

运行cloudformation模板时收到此错误: CREATE_FAILED:稳定参数/GS/web:1的参数创建

下面是创建参数和策略的资源的代码，这两个代码都在资源部分：

- PolicyName: SSMCreation
    PolicyDocument:
      Version: "2012-10-17"
      Statement:
        - Effect: Allow
          Action:
            - ssm:DescribeParameters
            - ssm:AddTagsToResource
            - ssm:GetParameter
            - ssm:GetParameters
            - ssm:GetParametersByPath
            - ssm:GetParameterHistory
            - ssm:PutParameter
            - ssm:LabelParameterVersion
            - ssm:DeleteParameter
            - ssm:DeleteParameters
          Resource:
            - !Sub "arn:${AWS::Partition}:ssm:${AWS::Region}:${AWS::AccountId}:parameter/*"

SSMImageParameter:
Type: AWS::SSM::Parameter
Properties:
  Type: String
  DataType: aws:ec2:image
  Name: /GS/web
  Value: !GetAtt CustomImage.ImageId

Answer 1

向imageCreation Lambda添加waitCondition

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-waitcondition.html

创建镜像需要一段时间，SSM参数的创建可能会在ImageId可用之前发生(lambda创建会成功，依赖也会成功，但必须在自定义lambda执行之后发生)