The maximum number of capacity providers per cluster has been exceeded

Amazon allows to create a maximum of 10 capacity providers per cluster, and cannot be increased. If you try to create a new capacity provider and have exceed the limit you will get the following error: the maximum number of capacity providers per cluster has been exceeded

Check if your capacity provider is in use by an Amazon ECS service in the capacity provider strategy

https://aws.amazon.com/premiumsupport/knowledge-center/ecs-capacity-provider-error/

#!/bin/bash
cluster=clustername 
capacityprovider=capacityprovidername
services=$(aws ecs list-services --cluster ${cluster} | jq --raw-output '.serviceArns[]')
aws ecs describe-services \
    --cluster ${cluster} \
    --services ${services} \
    | jq -r --arg capacityprovider "${capacityprovider}" \
    '.services[] | select(.capacityProviderStrategy[]?.capacityProvider == $capacityprovider) | .serviceName'

aws ecs describe-clusters --cluster mycluster | jq '.clusters[].defaultCapacityProviderStrategy'

Related

• When you specify a capacity provider strategy, the number of capacity providers that can be specified is limited to 6.
• aws ecs create-capacity-provider
• AWS ECS Cluster Auto Scaling (CAS)

Activities

• Read How do I resolve the DELETE_FAILED error when deleting the capacity provider in Amazon ECS?
• Read Jan 2020 article: Deep Dive on Amazon ECS Cluster Auto Scaling

See also

• aws ecs [ create-capacity-provider | delete-capacity-provider | describe-capacity-providers | put-cluster-capacity-providers | update-capacity-provider ]
• Amazon ECS, Service, Tasks (Task overview), capacity providers, Cluster Auto Scaling (CAS), aws ecs, ecs-cli, ~/.ecs/config, AWS Copilot, AWS Fargate, AWS CloudWatch Container Insights, /etc/ecs/ecs.config, Security group (SG), container agent, task definition, Amazon ECS events, best practices, Amazon ECS Exec Checker, Amazon ECS Agent, Service Connect, AWSServiceRoleForECS, Terraform ECS, AWS ECS Rolling deployments

https://docs.aws.amazon.com/AmazonECS/latest/developerguide/service-quotas.html