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Docker Swarm is Docker’s container orchestration tool that enables you to manage a cluster of Docker nodes as a single virtual system. Swarm makes it easier to deploy, manage, and scale containerized applications across multiple Docker hosts. It provides a simple integration with Docker’s existing ecosystem, allowing DevOps teams to use familiar tooling for orchestration, load balancing, and service discovery without needing to learn a new platform.

One of the key features of Docker Swarm is its ease of use, as it allows users to create and manage clusters with just a few commands. It supports multi-host networking and load balancing, meaning that services can be scaled across multiple nodes seamlessly. Additionally, it offers rolling updates and rollback features, ensuring zero downtime during deployments. Swarm also integrates well with Docker Compose, enabling developers to define multi-container applications easily. While Docker Swarm is free to use, organizations typically opt for this tool due to its straightforward implementation and tight-knit integration with existing Docker tools, making it a solid choice for teams already invested in the Docker ecosystem.