Manager Nodes
An manager node is an node with permissions to control worker nodes
Have an inbuild database called Raft its stores the information related to the cluster
The Database is synchronized between all the manager nodes in the cluster
The data shared among the nodes is protected using TLS
An manager node can be an worker node as well
Worker Nodes
Nodes where the docker images are actually executed
The swarm service command replaces the docker run command it allows us to specify replicas for each service will was not possible previously
A single service can have multiple tasks and each task will be a container