'How to remove node from swarm?

I added three nodes to a swarm cluster with static file mode. I want to remove host1 from the cluster. But I don't find a docker swarm remove command:

Usage: swarm [OPTIONS] COMMAND [arg...]
Commands:
  create, c Create a cluster
  list, l   List nodes in a cluster
  manage, m Manage a docker cluster
  join, j   join a docker cluster
  help, h   Shows a list of commands or help for one command

How can I remove the node from the swarm?

docker docker-swarm

Solution 1:^[1]

Using Docker Version: 1.12.0, docker help offers:

?  docker help swarm

Usage:  docker swarm COMMAND

Manage Docker 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
  update      Update the swarm
  leave       Leave a swarm

Run 'docker swarm COMMAND --help' for more information on a command.

So, next try:

?  docker swarm leave --help

Usage:  docker swarm leave [OPTIONS]

Leave a swarm

Options:
      --force   Force leave ignoring warnings.
      --help    Print usage

Solution 2:^[2]

Using the swarm mode introduced in the docker engine version 1.12, you can directly do docker swarm leave.

Solution 3:^[3]

The reference to "static file mode" implies the container based standalone swarm that predated the current Swarm Mode that most know as Swarm. These are two completely different "Swarm" products from Docker and are managed with completely different methods.

The other answers here focused on Swarm Mode. With Swarm Mode docker swarm leave on the target node will cause the node to leave the swarm. And when the engine is no longer talking to the manager, docker node rm on an active manager for the specific node will cleanup any lingering references inside the cluster.

With the container based classic swarm, you would recreate the manager container with an updated static list. If you find yourself doing this a lot, the external DB for discovery would make more sense (e.g. consul, etcd, or zookeeper). Given the classic swarm is deprecated and no longer being maintained, I'd suggest using either Swarm Mode or Kubernetes for any new projects.

Solution 4:^[4]

Try this:

docker node list # to get a list of nodes in the swarm
docker node rm <node-id>

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	arcseldon
Solution 2	Toni Piza
Solution 3	BMitch
Solution 4	DerekC

'How to remove node from swarm?

Solution 1:[1]

Solution 2:[2]

Solution 3:[3]

Solution 4:[4]

Sources

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