ECS services: loop over ECS cluster and scale down all tasks to 0

Question

I'm trying to write a script thats stops all services in an existing cluster. To accomplish this, ECS services must be scaled down to desired state of 0 tasks So far, I managed to do this for a single service via a simple shell script example:

 aws ecs update-service --cluster ${ecsClusterName} --service ${nameService} --task-definition ${taskDefinition} --desired-count 0

the problem I'm facing: how can I list all task's definitions:version linked to a giving service in a cluster and set the desired state to 0 in a loop

Answer 1

1. List services:

   aws ecs list-services --cluster ${ecsClusterName}
   

2. Write services in a file:

   aws ecs list-services --cluster ${ecsClusterName} | awk -F'"' '{print $2}' | rev | awk -F'/' '{print $1}' | rev | grep -v serviceArns > services.txt
   

3. Scale down:

   for service in $(cat services.txt); do aws ecs update-service --cluster ${ecsClusterName} --service "$service" --desired-count 0 --no-cli-pager > /dev/null; done