无服务器框架错误:每个资源对象都必须包含一个类型成员

Question

我正在尝试将EFS挂载到我的Lambda函数中，以便可以使用大型依赖项。到目前为止，我一直在关注this教程。

我稍微修改了一下.yml。

serverless.yml

service: test2EFS

plugins:
  - serverless-pseudo-parameters

custom:
  efsAccessPoint: fsap-00**********
  LocalMountPath: /mnt/efs
  subnetsId: subnet-0b**********
  securityGroup: sg-0b7**********

provider:
  name: aws
  runtime: python3.6
  region: us-east-2

package:
  exclude:
    - node_modules/**
    - .vscode/**
    - .serverless/**
    - .pytest_cache/**
    - __pychache__/**

functions:
  test:
    handler: handler.handler
    environment: # Service wide environment variables
      MNT_DIR: ${self:custom.LocalMountPath}
    vpc:
      securityGroupIds:
        - ${self:custom.securityGroup}
      subnetIds:
        - ${self:custom.subnetsId}
    iamManagedPolicies:
      - arn:aws:iam::aws:policy/AmazonElasticFileSystemClientReadWriteAccess
    events:
      - http:
          path: test
          method: get

resources:
  extensions:
    # Name of function
    test2EFSLambdaFunction:
      Properties:
        FileSystemConfigs:
          - Arn: 'arn:aws:elasticfilesystem:${self:provider.region}:#{AWS::AccountId}:access-point/${self:custom.efsAccessPoint}'
            LocalMountPath: '${self:custom.LocalMountPath}'

每当我运行severless deploy时，我都会得到以下错误：

Serverless: Uploading artifacts...
Serverless: Uploading service test2EFS.zip file to S3 (926 B)...
Serverless: Validating template...
 
  Error --------------------------------------------------
 
  Error: The CloudFormation template is invalid: Template format error: [/Resources/test2EFSLambdaFunction] Every Resources object must contain a Type member.
      at provider.request.catch (/usr/local/lib/node_modules/serverless/lib/plugins/aws/deploy/lib/validateTemplate.js:20:13)
      at tryCatcher (/usr/local/lib/node_modules/serverless/node_modules/bluebird/js/release/util.js:16:23)
      at Promise._settlePromiseFromHandler (/usr/local/lib/node_modules/serverless/node_modules/bluebird/js/release/promise.js:547:31)
      at Promise._settlePromise (/usr/local/lib/node_modules/serverless/node_modules/bluebird/js/release/promise.js:604:18)
      at Promise._settlePromise0 (/usr/local/lib/node_modules/serverless/node_modules/bluebird/js/release/promise.js:649:10)
      at Promise._settlePromises (/usr/local/lib/node_modules/serverless/node_modules/bluebird/js/release/promise.js:725:18)
      at _drainQueueStep (/usr/local/lib/node_modules/serverless/node_modules/bluebird/js/release/async.js:93:12)
      at _drainQueue (/usr/local/lib/node_modules/serverless/node_modules/bluebird/js/release/async.js:86:9)
      at Async._drainQueues (/usr/local/lib/node_modules/serverless/node_modules/bluebird/js/release/async.js:102:5)
      at Immediate.Async.drainQueues [as _onImmediate] (/usr/local/lib/node_modules/serverless/node_modules/bluebird/js/release/async.js:15:14)
      at runCallback (timers.js:705:18)
      at tryOnImmediate (timers.js:676:5)
      at processImmediate (timers.js:658:5)
      at process.topLevelDomainCallback (domain.js:126:23)

我尝试注释出各个部分，并将错误范围缩小到内部某个位置

resources:
  extensions:
    # Name of function
    test2EFSLambdaFunction:
      Properties:
        FileSystemConfigs:
          - Arn: 'arn:aws:elasticfilesystem:${self:provider.region}:#{AWS::AccountId}:access-point/${self:custom.efsAccessPoint}'
            LocalMountPath: '${self:custom.LocalMountPath}'

除了重命名(我认为是)一个无关紧要的函数名称之外，此代码片段与引用相同。我尝试根据我的帐户ID对#{AWS::AccountId}进行硬编码，但这不起作用。我现在有点迷惑了。

Answer 1

通常情况下，CloudFormation会在资源定义中使用Type参数，例如Type: AWS::Lambda::Function，这就是为什么你会看到这个错误。在你的例子中，你使用的是无服务器的Override AWS CloudFormation Resource功能，即名称需要与无服务器分配的规范化函数名完全匹配(参见上面链接的文档)，在你的例子中应该是TestLambdaFunction。

将您的代码更改为：

resources:
  extensions:
    TestLambdaFunction:
      Properties:
        [...]

Answer 2

我在GitHub上和一些人聊过。正如yvesonline所说的那样，这个方法覆盖了自动生成的云形成代码。Serverless具有对EFS的本机支持，并且推荐使用问题中描述的方法。

无服务器中的原生EFS看起来像这样；fileSystemConfig存在于函数定义中：

test:
    handler: handler.test
    environment: # Service wide environment variables
      MNT_DIR: ${self:custom.LocalMountPath}
    vpc:
      securityGroupIds:
        - ${self:custom.securityGroup}
      subnetIds:
        - ${self:custom.subnetsId}
    iamManagedPolicies:
      - arn:aws:iam::aws:policy/AmazonElasticFileSystemClientReadWriteAccess
    events:
      - http:
          path: test
          method: get
    fileSystemConfig:
      localMountPath: '${self:custom.LocalMountPath}'
      arn: 'arn:aws:elasticfilesystem:${self:provider.region}:#{AWS::AccountId}:access-point/${self:custom.efsAccessPoint}'

您可以阅读有关无服务器efs配置here的更多信息