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Federico Navarrete
Federico Navarrete

Posted on • Updated on • Originally published at supernovaic.blogspot.com

How to update ECS Tasks Revisions with AWS CLI

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}"
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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. A0nd that's all!

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