How to update ECS Tasks Revisions with AWS CLI

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Updating ECS Tasks Image Versions is not the easiest task if you don't go to the AWS Web UI. Also, there is not a direct code in order to do this in the AWS CLI. That's why I came up with the following code that supports you doing this without major effort.

The only prerequisites are:

  • A machine with WSL2 (I only tested in Ubuntu), Linux, or macOS.
  • Install jq (sudo apt-get install jq).
  • Create a .sh file with the following script.

TASK_NAME=task_name
SERVICE_NAME=service_name
IMAGE_NAME=image_name
CLUSTER_NAME=cluster_name
REGION=region
VERSION=version
ACCOUNT_NUMBER=account_number

NEW_IMAGE=$ACCOUNT_NUMBER.dkr.ecr.$REGION.amazonaws.com/$IMAGE_NAME:$VERSION
TASK_DEFINITION=$(aws ecs describe-task-definition --task-definition "$TASK_NAME" --region "$REGION")
NEW_TASK_DEFINITION=$(echo $TASK_DEFINITION | jq --arg IMAGE "$NEW_IMAGE" '.taskDefinition | .containerDefinitions[0].image = $IMAGE | del(.taskDefinitionArn) | del(.revision) | del(.status) | del(.requiresAttributes) | del(.compatibilities) | del(.registeredAt) | del(.registeredBy)')
NEW_REVISION=$(aws ecs register-task-definition --region "$REGION" --cli-input-json "$NEW_TASK_DEFINITION")
NEW_REVISION_DATA=$(echo $NEW_REVISION | jq '.taskDefinition.revision')

NEW_SERVICE=$(aws ecs update-service --cluster $CLUSTER_NAME --service $SERVICE_NAME --task-definition $TASK_NAME --force-new-deployment)

echo "done"
echo "${TASK_NAME}, Revision: ${NEW_REVISION_DATA}"

After this, you need to update the environment variables:

  • TASK_NAME=task_name
  • SERVICE_NAME=service_name
  • IMAGE_NAME=image_name
  • CLUSTER_NAME=cluster_name
  • REGION=region
  • VERSION=version
  • ACCOUNT_NUMBER=account_number

And then you run the .sh like this, ./update_task.sh. And that's all!

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