Script to deregister all ECS Task Definitions in a given region

deregister-task-definitions.sh

#!/usr/bin/env bash

get_task_definition_arns() {
	aws ecs list-task-definitions --region ${AWS_REGION} \
		| jq -M -r '.taskDefinitionArns | .[]'
}

delete_task_definition() {
	local arn=$1

	aws ecs deregister-task-definition \
		--region us-east-2 \
		--task-definition "${arn}" > /dev/null
}


if [ -z "${AWS_REGION}" ] ; then
	(>&2 echo "AWS_REGION is not set")
	exit 1
fi

for arn in $(get_task_definition_arns)
do
	echo "Deregistering ${arn}..."
	delete_task_definition "${arn}"
done

thanks for sharing, very helpful!

Worked like a charm, when deregistering task definitions from the console didn't play ball.

A set of my aws keys got leaked and some lovely humans setup 342 clusters on ECS, across multiple regions. I used this script and created a couple more to deregister and delete the tasks, clusters and services, so a BIG thank you for sharing this!

To share the love, I've created a gist with the other two scripts scripts I wrote, very much inspired by this gist:

https://gist.github.com/woutercouvaras/a466afc9af65ff9d798b8401f19db6e0