The closest matching container-instance

 service your-service was unable to place a task because no container instance met all of its requirements. The closest matching container-instance xxxxxxxxx doesn't have the agent connected. For more information, see the Troubleshooting section of the Amazon ECS Developer Guide.

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