# Docker Swarm

With using Docker Swarm we can combine mutiple Docker machines together into a single cluster .

\>>Docker swarm take care of distributing our services & application instances into separate HOSTS for high availability & for LOAD balancing across different systems & hardware .

![](/files/-MEaigv5U1mhn2xpBuNQ)

To setup Docker swarm we need multiple DOCKER HOST with Docker installed on them. The we designate one HOST to be the manager or the master /Swarm Manager & other as Workrs .

Run docker swarm init on manager & that will initialize the swarm manager 

![](/files/-MEajMd-Z8JvHNav6jI-)

![](/files/-MEajZumIhg4jQhtVZY7)

The key component of Swarm orchestartor is docker service ..

Docker service are one or more instances of single application that runs the nodes of swarm clsuter .


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