Join nodes to a swarm (Engine)

Join nodes to a swarm

When you first create a swarm, you place a single Docker Engine (Engine) into swarm mode. To take full advantage of swarm mode you can add nodes to the swarm:

• Adding worker nodes increases capacity. When you deploy a service to a swarm, the Engine schedules tasks on available nodes whether they are worker nodes or manager nodes. When you add workers to your swarm, you increase the scale of the swarm to handle tasks without affecting the manager raft consenus.
• Manager nodes increase fault-tolerance. Manager nodes perform the orchestration and cluster management functions for the swarm. Among manager nodes, a single leader node conducts orchestration tasks. If a leader node goes down, the remaining manager nodes elect a new leader and resume orchestration and maintenance of the swarm state. By default, manager nodes also run tasks.

Before you add nodes to a swarm you must install Docker Engin