Docker Swarm
Docker Swarm is a native clustering and orchestration tool for Docker containers, enabling the management of a cluster of Docker nodes as a single virtual system. It provides built-in features for service deployment, scaling, load balancing, and rolling updates across multiple hosts. It is integrated directly into the Docker Engine, making it a lightweight alternative to more complex orchestration systems.
Developers should use Docker Swarm when they need a simple, integrated solution for orchestrating Docker containers in production environments, especially for small to medium-scale deployments. It is ideal for teams already using Docker who want to scale applications across multiple machines without the steep learning curve of Kubernetes, and it supports features like service discovery, load balancing, and secure communication out-of-the-box.