5- Docker swarm or Orchestrator
root@master:~# docker swarm --help
Usage: docker swarm COMMAND
Manage Swarm
Options:
--help Print usage
Commands:
init         Initialize a swarm
join        Join a swarm as a node and/or manager
join-token Manage join tokens
leave     Leave the swarm
unlock    Unlock swarm
unlock-key Manage the unlock key
update    Update the swarm
Run 'docker swarm COMMAND --help' for more information on a command.