Usage: docker swarm leave [OPTIONS] Leave the swarm Options: -f, --force Force this node to leave the swarm, ignoring warnings --help Print usage
When you run this command on a worker, that worker leaves the swarm.
You can use the --force option to on a manager to remove it from the swarm. However, this does not reconfigure the swarm to ensure that there are enough managers to maintain a quorum in the swarm. The safe way to remove a manager from a swarm is to demote it to a worker and then direct it to leave the quorum without using --force. Only use --force in situations where the swarm will no longer be used after the manager leaves, such as in a single-node swarm.
Consider the following swarm, as seen from the manager:
$ docker node ls ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS 7ln70fl22uw2dvjn2ft53m3q5 worker2 Ready Active dkp8vy1dq1kxleu9g4u78tlag worker1 Ready Active dvfxp4zseq4s0rih1selh0d20 * manager1 Ready Active Leader
To remove worker2, issue the following command from worker2 itself:
$ docker swarm leave Node left the default swarm.
To remove an inactive node, use the node rm command instead.