amazon-ecs - 如何从触发的 Fargate 任务访问 CloudWatch 事件数据？

Question

我阅读了有关如何 Run an Amazon ECS Task When a File is Uploaded to an Amazon S3 Bucket 的文档.但是，本文档没有解释如何从 Fargate 任务代码本身内的触发事件中获取存储桶/键值。怎么办？

Answer 1

我不确定您是否还需要这个答案。但是我做了类似于 Steven1978 提到的事情，但只使用了 CloudFormation。

您正在寻找的配置是 InputTransformer。检查此示例以了解事件规则的 YAML CloudFormation 模板:

rEventRuleForFileUpload:
Type: AWS::Events::Rule
Properties:
  Description: "EventRule"
  State: "ENABLED"
  EventPattern:
    source:
      - "aws.s3"
    detail-type:
      - 'AWS API Call via CloudTrail'
    detail:
      eventSource:
        - s3.amazonaws.com
      eventName:
        - "PutObject"
        - "CompleteMultipartUpload"
      requestParameters:
        bucketName: "{YOUR_BUCKET_NAME}"

  Targets:
    - Id: '{YOUR_ECS_CLUSTER_ID}'
      Arn: !Sub "arn:aws:ecs:${AWS::Region}:${AWS::AccountId}:cluster/${NAME_OF_YOUR_CLUSTER_RESOURCE}"
      RoleArn: !GetAtt {YOUR_ROLE}.Arn
      EcsParameters:
        TaskCount: 1
        TaskDefinitionArn: !Ref {YOUR_TASK_DEFINITION}
        LaunchType: FARGATE

        {... WHATEVER CONFIG YOU MIGHT HAVE...}

      InputTransformer:
        InputPathsMap:
          s3_bucket: "$.detail.requestParameters.bucketName"
          s3_key: "$.detail.requestParameters.key"
        InputTemplate: '{ "containerOverrides": [ { "name": "{THE_NAME_OF_YOUR_CONTAINER_DEFINITION}", "environment": [ { "name": "EVENT_BUCKET", "value": <s3_bucket> }, { "name": "EVENT_OBJECT_KEY", "value": <s3_key> }] } ] }'

通过这种方法，您将能够获取 s3 存储桶名称 (EVENT_BUCKET) 和 s3 对象键 (EVENT_OBJECT_KEY) 作为容器内的环境变量。

信息确实不是很清楚，但这里有一些我用来最终让它工作的资源:

容器覆盖； https://docs.aws.amazon.com/AmazonECS/latest/APIReference/API_ContainerOverride.html

输入转换器: https://docs.aws.amazon.com/eventbridge/latest/APIReference/API_InputTransformer.html#API_InputTransformer_Contents