Which solution meets these requirements with the LEAST amount of operational overhead?
An open source Docker orchestrator on Amazon EC2 instances
AWS AppSync
Amazon Elastic Container Registry (Amazon ECR)
Amazon Elastic Container Service (Amazon ECS)
Explanations:
An open source Docker orchestrator on Amazon EC2 instances would require significant management and maintenance effort, increasing operational overhead.
AWS AppSync is primarily a service for building GraphQL APIs and does not relate to deploying or managing Docker-based applications.
Amazon Elastic Container Registry (ECR) is a container registry service that allows for storing Docker images, but it does not provide orchestration or deployment capabilities.
Amazon Elastic Container Service (ECS) is a fully managed container orchestration service that simplifies the deployment and management of Docker containers, resulting in minimal operational overhead.