如何从触发的Fargate任务访问CloudWatch事件数据？ [英] How to access CloudWatch Event data from triggered Fargate task?

问题描述

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，本文档并未说明如何从Fargate任务代码本身的触发事件中获取存储桶/键值。如何做到这一点？

推荐答案

我不确定您是否还需要这个问题的答案。但我做了一些与Steven1978提到的类似的事情，但只使用了CloudForms。

您要查找的配置是InputTransformer。检查此示例以获取事件规则的YAML CloudForment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> }] } ] }'

使用此方法，您将能够将S3存储桶名称(EVENT_BACKET)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，但以下是我用来最终使其正常工作的一些来源：

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

InputTransformer： https://docs.aws.amazon.com/eventbridge/latest/APIReference/API_InputTransformer.html#API_InputTransformer_Contents

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