[ECS] [Fargate] Script to get Task ID in TASK execution container

There wasn't a very good way to look it up, so I made it for the time being.

TD;DR

• I did it using curl and python -c.

• Use Task Metadata Endpoint Version 3

• Supported versions are as follows

• EC2: 1.21.0 or later version

• Fargate: v1.3.0 or later version

• Get $ {ECS_CONTAINER_METADATA_URI} / task with curl, parse with python and get from TaskARN

#!/bin/bash

METADATA=$(curl ${ECS_CONTAINER_METADATA_URI}/task)
python3 -c "import json; meta=json.loads('$METADATA'); task_id=meta['TaskARN'].split('/')[-1]; print(task_id)" > ./task_id
TASK_ID=$(cat ./task_id)

I want to get a TASK ID

• There was a time when I wanted to process based on Task ID in TASK execution container.
• But environment variables are not prepared
• METADATA can be taken, so parsed from there

Summary

• I was able to take it
• But I don't think it's really something to do within the TASK execution container
• I want you to prepare environment variables normally

reference

• Organized Task Metadata Endpoint in ECS