[ECS] [request]: Add ability to update task definition

[tim-finnigan]

Please see https://github.com/aws/aws-sdk/issues/406 for background and discussion.

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Which service(s) is this request for? ECS [edited]

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[jlbutler]

I've tagged this ECS and edited the issue for service to improve tracking.

[ezhukov]

Please prioritize this, because now I have to do the following in my CI yml just to update an image:

- >
  aws ecs describe-services
  --cluster $AWS_ECS_CLUSTER
  --services $AWS_ECS_SERVICE
  --query 'services[].taskDefinition[]'
  --output text |
  xargs aws ecs describe-task-definition --task-definition |
  jq --arg IMAGE $AWS_ECR/my-project:new-img-tag '.taskDefinition
  | .containerDefinitions[0].image = $IMAGE
  | del(.taskDefinitionArn)
  | del(.revision)
  | del(.status)
  | del(.requiresAttributes)
  | del(.compatibilities)
  | del(.registeredAt)
  | del(.registeredBy)' |
  xargs -0 aws ecs register-task-definition --cli-input-json |
  jq '.taskDefinition.taskDefinitionArn' |
  xargs aws ecs update-service
  --cluster $AWS_ECS_CLUSTER
  --service $AWS_ECS_SERVICE
  --task-definition

[ashikMostofaTonmoy]

I have slightly modified this that doesn't need 'jq' but can use custom tag

#!/bin/sh

# Define the full image name with tag
FULL_IMAGE="registry/project:mycustomtag"

# Retrieve details of the existing ECS task definition
TASK_DEFINITION=$(aws ecs describe-task-definition \
--task-definition "$TASK_DEFINATION_NAME" \
--region "$REGISTRY_REGION" \
--query '{  containerDefinitions: taskDefinition.containerDefinitions,
            family: taskDefinition.family,
            executionRoleArn: taskDefinition.executionRoleArn,
            volumes: taskDefinition.volumes,
            placementConstraints: taskDefinition.placementConstraints,
            cpu: taskDefinition.cpu,
            memory: taskDefinition.memory
            }')

# Modify the task definition to update the image name with the provided full image
NEW_TASK_DEFINITION=$(echo "$TASK_DEFINITION" | sed "s|\"image\": \".*\"|\"image\": \"$FULL_IMAGE\"|")
echo $NEW_TASK_DEFINITION

# Register the modified task definition
NEW_TASK_INFO=$(aws ecs register-task-definition \
      --region "$REGISTRY_REGION" \
      --cli-input-json "$NEW_TASK_DEFINITION")
echo $NEW_TASK_INFO

# Extract the revision number of the newly registered task definition
REVISION=$(echo "$NEW_TASK_INFO" | grep -o '"revision":[^,]*' | cut -d':' -f2)

# Remove leading and trailing whitespaces from the revision number
NEW_REVISION=$(echo $REVISION | tr -d ' ')
echo $NEW_REVISION

# Update ecs service
UPDATE_SERVICE=$(aws ecs update-service \
--region $REGISTRY_REGION \
--cluster ${CLUSTER_NAME} \
--service ${SERVICE_NAME} \
--task-definition ${TASK_DEFINATION_NAME}:${NEW_REVISION})