amazon-web-services - 如何使用云形成模板在 dynamodb 表中创建项目条目？

Question

我有一个云形成模板，我正在使用该模板将 lamdba 函数和一个 dynamo db 表部署到第三方 aws 帐户中，现在我想使用相同的云形成模板在创建的 dynamo db 表中创建条目。有人可以帮忙吗？

我尝试过以下云形成模板，但它不起作用 -

AWSTemplateFormatVersion: '2010-09-09'
Resources:
  LambdaRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Version: '2012-10-17'
        Statement:
        - Effect: Allow
          Principal:
            Service:
            - lambda.amazonaws.com
          Action:
          - sts:AssumeRole
      Path: "/"
      Policies:
      - PolicyName: dynamodbAccessRole
        PolicyDocument:
          Version: '2012-10-17'
          Statement:
          - Effect: Allow
            Action:
            - dynamodb:*
            Resource: "*"
          - Effect: Allow
            Action:
            - logs:*
            Resource: "*"
  InitFunction:
    Type: AWS::Lambda::Function
    Properties:
      Code:
        ZipFile: >
          const AWS = require("aws-sdk"); const response = require("cfn-response"); const docClient = new AWS.DynamoDB.DocumentClient();

          exports.handler = function(event, context) {
              console.log(JSON.stringify(event, null, 2));
              var params = {
                TableName: event.ResourceProperties.DynamoTableName,
                Item:{
                  "id": "abc123"
                }
              };

              docClient.put(params, function(err, data) {
                if (err) {
                  response.send(event, context, "FAILED", {});
                } else {
                  response.send(event, context, "SUCCESS", {});
                }

                // Send signal to WaitCondition
                const cloudformation = new AWS.CloudFormation();
                const signalParams = {
                  UniqueId: event.ResourceProperties.WaitConditionId,
                };

                cloudformation.signalResource(signalParams, function(signalErr, signalData) {
                  if (signalErr) {
                    console.log("Error sending signal to WaitCondition:", signalErr);
                  } else {
                    console.log("Signal sent to WaitCondition");
                  }
                });
              });
      Handler: index.handler
      Role: !GetAtt LambdaRole.Arn
      Runtime: nodejs18.x
      Timeout: 60
  DynamoDB:
    Type: AWS::DynamoDB::Table
    Properties:
      AttributeDefinitions:
      - AttributeName: id
        AttributeType: S
      KeySchema:
      - AttributeName: id
        KeyType: HASH
      ProvisionedThroughput:
        ReadCapacityUnits: 1
        WriteCapacityUnits: 1

  InitWaitCondition:
    Type: AWS::CloudFormation::WaitCondition
    DependsOn: InitFunction
    Properties:
      Handle: !Ref InitWaitConditionHandle
      Timeout: '300'
      Count: 1

  InitWaitConditionHandle:
    Type: AWS::CloudFormation::WaitConditionHandle

  InitializeDynamoDB:
    Type: Custom::InitFunction
    Properties:
      ServiceToken: !GetAtt InitFunction.Arn
      DynamoTableName: !Ref DynamoDB
      WaitConditionHandle: !Ref InitWaitConditionHandle

Answer 1

你必须开发一个custom resource在 CloudFormation 中。这将采用 Lambda 函数的形式，该函数将使用 AWS SDK 填充您的 DynamoDB 表。