amazon-web-services - 无服务器部署 lambda 无法承担现有 IAM 角色

Question

我觉得这个问题已经被问到了很多，但从目前的答案来看，没有什么对我有用。

我正在尝试使用无服务器部署应用程序。我的 serverless.yml是:

app: product-events-api

service: product-events
custom:
  secrets: ${ssm:/aws/reference/secretsmanager/serverless-product-events-${self:provider.stage}~true, ''}
  provider:
    name: aws
    runtime: nodejs10.x
    region: eu-west-1
    stage: ${opt:stage, 'preview'}
    timeout: 30
    # Role ARN must adhere to the RegEx: arn:(aws[a-zA-Z-]*)?:iam::\d{12}:role/?[a-zA-Z_0-9+=,.@\-_/]+
    role: arn:aws:iam::${self:custom.secrets.AWS_ACCOUNT_ID}:role/${self:custom.secrets.IAM_ROLE_NAME}
    vpc: ${self:custom.secrets.vpc}
    environment:
      STAGE: ${self:provider.stage}
      NODE_ENV: production
      DB_NAME: ${self:custom.secrets.DB_NAME}
      DB_URL: ${self:custom.secrets.DB_URL}

functions:
  getProductEvents:
    handler: src/routes/api/handler.events
    memorySize: 1024
    description: Get product event
    events:
      - http:
          path: /events
          method: get

role评估为 arn:aws:iam::<Account ID>:role/lambda_basic_execution 的绝对 ARN .

运行 sls deploy --stage production给了我错误:

An error occurred: GetProductEventsLambdaFunction - The role defined for the function cannot be assumed by Lambda. (Service: AWSLambdaInternal; Status Code: 400; Error Code: InvalidParameterValueException; Request ID: 4750b33e-329c-4383-abd4-a61ec4d326b2).

我们拥有的几乎每个 lambda 都使用这个 IAM 角色。我转向这个答案试图定义 role只是在函数级别的名称，但得到:

The CloudFormation template is invalid: Template error: instance of Fn::GetAtt references undefined resource lamba_basic_execution

如果我跑； aws iam get-role --role-name lambda_basic_execution ，我返回:

{
    "Role": {
        "AssumeRolePolicyDocument": {
           "Version": "2012-10-17",
            "Statement": [
                {
                    "Action": "sts:AssumeRole",
                    "Principal": {
                        "Service": "lambda.amazonaws.com"
                    },
                    "Effect": "Allow",
                    "Sid": ""
                }
            ]
        },
        "MaxSessionDuration": 3600,
        "RoleId": "<Role ID>",
        "CreateDate": "2015-10-13T15:06:34Z",
        "RoleName": "lambda_basic_execution",
        "Path": "/",
        "Arn": "arn:aws:iam::<Account ID>:role/lambda_basic_execution"
    }
}

如果我删除声明 role从模板，部署工作，然后我可以通过控制台手动添加角色。我想这是一个无服务器问题。

Answer 1

正如您提到的，您几乎没有使用相同 IAM 角色的 lambda，我建议您创建一个 IAM 角色作为 serverless.yml 脚本的一部分。这种方法的好处是您可以根据 future 的需要轻松添加或删除任何权限。你可以做类似的事情

  YourIAMRole:
     Type: AWS::IAM::Role 
     Properties: 
       AssumeRolePolicyDocument: 
         Statement: 
          - Effect: Allow 
            Principal: 
              Service: lambda.amazonaws.com 
            Action: sts:AssumeRole 

       Path: / 
       ManagedPolicyArns: 
       - arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole 
       Policies: 
         - # Any permission you want to add, For an example I am adding S3
          PolicyName: "resources_access" 
          PolicyDocument: 
            Version: "2012-10-17" 
            Statement: 
             - 
              Effect: "Allow" 
              Action: "s3:Get*" 
              Resource: !Join
                - ''
                - - "arn:aws:s3:::"
                  - !Ref YourParameteredBucketName

完成此操作后，您可以将此角色分配给您的功能，如下所示:

 Role: !GetAtt YourIAMRole.Arn