ECS Service - Automating deploy with new Docker image

Question

I want to automate the deployment of my application by having my ECS service launch with the latest Docker image. From what I\'ve read, the way to deploy a new image version is

Answer 1

The answer provided by Matt Callanan did not work for me: I received an error on this part:

--container-definitions "'$(echo $NEW_CONTAINER_DEFS)'"

Resulted in: Error parsing parameter '--container-definitions': Expected: '=', received: ''' for input:

'{ environment: [ { etc etc....

What I did to resolve it was:

TASK_FAMILY= 
DOCKER_IMAGE=
LATEST_TASK_DEFINITION=$(aws ecs describe-task-definition --task-definition ${TASK_FAMILY})

echo $LATEST_TASK_DEFINITION \
     | jq '{containerDefinitions: .taskDefinition.containerDefinitions, volumes: .taskDefinition.volumes}' \
     | jq '.containerDefinitions[0].image='\"${DOCKER_IMAGE}\" \
     > /tmp/tmp.json

aws ecs register-task-definition --family ${TASK_FAMILY} --cli-input-json file:///tmp/tmp.json

I take both the containerDefinitions and volumes elements from the original json document, because my containerDefinition uses these volumes (so it's not needed if you don't use volumes).