mirror of https://github.com/docker/cli.git
117 lines
3.5 KiB
Markdown
117 lines
3.5 KiB
Markdown
---
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title: "swarm join-token"
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description: "The swarm join-token command description and usage"
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keywords: "swarm, join-token"
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---
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# swarm join-token
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```markdown
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Usage: docker swarm join-token [OPTIONS] (worker|manager)
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Manage join tokens
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Options:
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--help Print usage
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-q, --quiet Only display token
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--rotate Rotate join token
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```
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## Description
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Join tokens are secrets that allow a node to join the swarm. There are two
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different join tokens available, one for the worker role and one for the manager
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role. You pass the token using the `--token` flag when you run
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[swarm join](swarm_join.md). Nodes use the join token only when they join the
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swarm.
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> **Note**
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>
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> This is a cluster management command, and must be executed on a swarm
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> manager node. To learn about managers and workers, refer to the
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> [Swarm mode section](https://docs.docker.com/engine/swarm/) in the
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> documentation.
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## Examples
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You can view or rotate the join tokens using `swarm join-token`.
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As a convenience, you can pass `worker` or `manager` as an argument to
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`join-token` to print the full `docker swarm join` command to join a new node to
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the swarm:
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```console
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$ docker swarm join-token worker
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To add a worker to this swarm, run the following command:
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docker swarm join \
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--token SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-1awxwuwd3z9j1z3puu7rcgdbx \
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172.17.0.2:2377
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$ docker swarm join-token manager
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To add a manager to this swarm, run the following command:
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docker swarm join \
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--token SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-7p73s1dx5in4tatdymyhg9hu2 \
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172.17.0.2:2377
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```
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Use the `--rotate` flag to generate a new join token for the specified role:
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```console
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$ docker swarm join-token --rotate worker
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Successfully rotated worker join token.
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To add a worker to this swarm, run the following command:
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docker swarm join \
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--token SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-b30ljddcqhef9b9v4rs7mel7t \
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172.17.0.2:2377
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```
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After using `--rotate`, only the new token will be valid for joining with the specified role.
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The `-q` (or `--quiet`) flag only prints the token:
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```console
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$ docker swarm join-token -q worker
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SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-b30ljddcqhef9b9v4rs7mel7t
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```
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### `--rotate`
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Because tokens allow new nodes to join the swarm, you should keep them secret.
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Be particularly careful with manager tokens since they allow new manager nodes
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to join the swarm. A rogue manager has the potential to disrupt the operation of
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your swarm.
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Rotate your swarm's join token if a token gets checked-in to version control,
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stolen, or a node is compromised. You may also want to periodically rotate the
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token to ensure any unknown token leaks do not allow a rogue node to join
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the swarm.
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To rotate the join token and print the newly generated token, run
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`docker swarm join-token --rotate` and pass the role: `manager` or `worker`.
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Rotating a join-token means that no new nodes will be able to join the swarm
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using the old token. Rotation does not affect existing nodes in the swarm
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because the join token is only used for authorizing new nodes joining the swarm.
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### `--quiet`
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Only print the token. Do not print a complete command for joining.
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## Related commands
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* [swarm ca](swarm_ca.md)
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* [swarm init](swarm_init.md)
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* [swarm join](swarm_join.md)
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* [swarm leave](swarm_leave.md)
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* [swarm unlock](swarm_unlock.md)
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* [swarm unlock-key](swarm_unlock-key.md)
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* [swarm update](swarm_update.md)
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