Question

我正在尝试创建一个简单的（目前）云形成/代码管道集成，但是在为Cloudformation生成变更集时遇到错误。

我有我的代码管道使用以下代码构建输出YML（以下模板）：- aws cloudformation package --template template.json --s3-bucket $S3_BUCKET --output-template template-export.yml，然后进行导出，然后进入云结构以创建变更集。

当它尝试创建变更集时，出现此错误Parameters: [ProjectId] must have values (Service: AmazonCloudFormation; Status Code: 400; Error Code: ValidationError; Request ID: 4d20b24f-fd8b-11e8-9014-599dd1a18437)

出了什么问题？

输入template.json

{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Parameters": {
    "ProjectId": {
      "Type": "String",
      "Description": "Codepipeline cloudformation test"
    },
    "Stage": {
      "Default": "",
      "Type": "String",
      "Description": "I am guessing some thing goes here"
    }
  },
  "Resources": {
    "LambdaExecutionRole": {
      "Type": "AWS::IAM::Role",
      "Description": "Creating service role in IAM for AWS Lambda",
      "Properties": {
        "RoleName": {
          "Fn::Sub": "CodeStar-${ProjectId}-Execution${Stage}"
        },
        "AssumeRolePolicyDocument": {
          "Statement": [{
            "Action": "sts:AssumeRole",
            "Effect": "Allow",
            "Principal": {
              "Service": [
                "lambda.amazonaws.com"
              ]
            }
          }]
        },
        "ManagedPolicyArns": [
          "arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole"
        ],
        "Path": "/"
      }
    },
    "CreateUser": {
      "Type": "AWS::Lambda::Function",
      "Properties": {
        "Handler": "API/CreateUser.handler",
        "Code": "API/CreateUser.py",
        "Role": {
          "Fn::GetAtt": [
            "LambdaExecutionRole",
            "Arn"
          ]
        },
        "Runtime": "python2.7",
      }
    }
  }

}

从codebuild template-export.yml输出

AWSTemplateFormatVersion: '2010-09-09'
Parameters:
  ProjectId:
    Description: Codepipeline cloudformation test
    Type: String
  Stage:
    Default: ''
    Description: I am guessing some thing goes here
    Type: String
Resources:
  CreateUser:
    Properties:
      Code:
        S3Bucket: xxxx
        S3Key: xxxx
      Handler: API/CreateUser.handler
      Role:
        Fn::GetAtt:
        - LambdaExecutionRole
        - Arn
      Runtime: python2.7
    Type: AWS::Lambda::Function
  LambdaExecutionRole:
    Description: Creating service role in IAM for AWS Lambda
    Properties:
      AssumeRolePolicyDocument:
        Statement:
        - Action: sts:AssumeRole
          Effect: Allow
          Principal:
            Service:
            - lambda.amazonaws.com
      ManagedPolicyArns:
      - arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole
      Path: /
      RoleName:
        Fn::Sub: CodeStar-${ProjectId}-Execution${Stage}
    Type: AWS::IAM::Role

其他信息：

Cloudformation正在将IAM与完整的管理员特权一起使用。 allow *

生成变更集设置：

操作模式：创建或替换变更集
模板：BuildArtifact :: template-export.yml
功能：CAPABILITY_NAMED_IAM
角色名称：cloudformation-admin
输入工件：BuildArtifact

Answer 1

这里的问题是，如果您在此处查看模板的代码段，则尚未将值传递给cloudformation模板中的ProjectId参数：

{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Parameters": {
    "ProjectId": {
      "Type": "String",
      "Description": "Codepipeline cloudformation test"
    },
    "Stage": {
      "Default": "",
      "Type": "String",
      "Description": "I am guessing some thing goes here"
    }
  },

您已为参数Stage指定了默认值，而ProjectId没有任何默认值，这意味着，如果您在CLI命令中未指定想要的ProjectId值，则将不会有任何结果验证失败，因为实际上该值为None时，期望该参数存在一个字符串。

如果您改为这样做：

{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Parameters": {
    "ProjectId": {
      "Default": "",
      "Type": "String",
      "Description": "Codepipeline cloudformation test"
    },
    "Stage": {
      "Default": "",
      "Type": "String",
      "Description": "I am guessing some thing goes here"
    }
  },

这意味着条目将为空字符串，但cloudformation模板不应再通过验证失败。

AWS Cloudformation / Codepipeline参数：[ProjectId]必须具有值

1 个答案: