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Install and Configure Docker Swarm on Ubuntu

Table of Contents

Prerequisite

Setup a server

The network ports required for a Docker Swarm to function correctly are:

  • TCP port 2376 for secure Docker client communication. This port is required for Docker Machine to work. Docker Machine is used to orchestrate Docker hosts.
  • TCP port 2377. This port is used for communication between the nodes of a Docker Swarm or cluster. It only needs to be opened on manager nodes.
  • TCP and UDP port 7946 for communication among nodes (container network discovery).
  • UDP port 4789 for overlay network traffic (container ingress networking).

Initialize Swarm manager node

docker swarm init

References.