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Classic Swarm: a Docker-native clustering system

Classic Swarm has been archived and is no longer actively developed. You may want to use the Swarm mode built into the Docker Engine instead, or another orchestration system.

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Docker Swarm "Classic" is native clustering for Docker. It turns a pool of Docker hosts into a single, virtual host.

Swarm Disambiguation

Docker Swarm "Classic" standalone: This project. A native clustering system for Docker. It turns a pool of Docker hosts into a single, virtual host using an API proxy system. See Docker Swarm overview. It was Docker's first container orchestration project that began in 2014.

Swarmkit: Cluster management and orchestration features in Docker Engine 1.12 or later. When Swarmkit is enabled we call Docker Engine running in swarm mode. See the feature list: Swarm mode overview. This project focuses on micro-service architecture. It supports service reconciliation, load balancing, service discovery, built-in certificate rotation, etc.

Copyright and license

Copyright © 2014-2018 Docker, Inc. All rights reserved, except as follows. Code is released under the Apache 2.0 license. The file, and files in the "docs" folder are licensed under the Creative Commons Attribution-ShareAlike 4.0 International License under the terms and conditions set forth in the file "". You may obtain a duplicate copy of the same license, titled CC-BY-SA-4.0, at


Swarm Classic: a container clustering system. Not to be confused with Docker Swarm which is at




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