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→Swarm classic
==Swarm classic==
Prior to Docker 1.12 Swarm (Classic) existed as a standalone product, it relied on a complicated setup of external service discovery systems (eg consul) and a dedicated set of containers which ran as the swarm controllers. Load balancing network traffic across containers required external load balancers, and these needed to be integrated with service discovery to function correctly. Standalone Docker hosts were members of a swarm cluster, and the swarm controllers presented the pooled capacity from all hosts as a single “virtual” docker host. By presenting the swarm cluster as a virtual docker host meant that the way you interacted with Swarm was exactly the same way you interacted with a standalone host (docker run, docker ps, docker images, docker volumes), you just directed the commands (using –H=tcp://) at the swarm master IP:Port instead of individual swarm nodes.
A Docker 1.12-es verziója előtt a Swarm (Classic) egy külön álló termék volt, nem volt része a docker engine-nek. A swarm-ot a docker engine-en futó swarm konténerekkel kellett létrehozni. Vo
==Swarm mode==