mirror of https://github.com/docker/cli.git
98 lines
3.6 KiB
Markdown
98 lines
3.6 KiB
Markdown
<!--[metadata]>
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+++
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title = "swarm join"
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description = "The swarm join command description and usage"
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keywords = ["swarm, join"]
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[menu.main]
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parent = "smn_cli"
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+++
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<![end-metadata]-->
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# swarm join
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```markdown
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Usage: docker swarm join [OPTIONS] HOST:PORT
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Join a swarm as a node and/or manager
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Options:
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--advertise-addr value Advertised address (format: <ip|interface>[:port])
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--help Print usage
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--listen-addr value Listen address (format: <ip|interface>[:port)
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--token string Token for entry into the swarm
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```
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Join a node to a swarm. The node joins as a manager node or worker node based upon the token you
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pass with the `--token` flag. If you pass a manager token, the node joins as a manager. If you
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pass a worker token, the node joins as a worker.
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### Join a node to swarm as a manager
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The example below demonstrates joining a manager node using a manager token.
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```bash
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$ docker swarm join --token SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-7p73s1dx5in4tatdymyhg9hu2 192.168.99.121:2377
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This node joined a swarm as a manager.
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$ docker node ls
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ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS
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dkp8vy1dq1kxleu9g4u78tlag * manager2 Ready Active Reachable
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dvfxp4zseq4s0rih1selh0d20 manager1 Ready Active Leader
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```
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A cluster should only have 3-7 managers at most, because a majority of managers must be available
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for the cluster to function. Nodes that aren't meant to participate in this management quorum
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should join as workers instead. Managers should be stable hosts that have static IP addresses.
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### Join a node to swarm as a worker
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The example below demonstrates joining a worker node using a worker token.
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```bash
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$ docker swarm join --token SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-1awxwuwd3z9j1z3puu7rcgdbx 192.168.99.121:2377
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This node joined a swarm as a worker.
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$ docker node ls
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ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS
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7ln70fl22uw2dvjn2ft53m3q5 worker2 Ready Active
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dkp8vy1dq1kxleu9g4u78tlag worker1 Ready Active Reachable
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dvfxp4zseq4s0rih1selh0d20 * manager1 Ready Active Leader
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```
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### `--listen-addr value`
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If the node is a manager, it will listen for inbound Swarm manager traffic on this
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address. The default is to listen on 0.0.0.0:2377. It is also possible to specify a
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network interface to listen on that interface's address; for example `--listen-addr eth0:2377`.
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Specifying a port is optional. If the value is a bare IP address, or interface
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name, the default port 2377 will be used.
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This flag is generally not necessary when joining an existing swarm.
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### `--advertise-addr value`
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This flag specifies the address that will be advertised to other members of the
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swarm for API access. If unspecified, Docker will check if the system has a
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single IP address, and use that IP address with with the listening port (see
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`--listen-addr`). If the system has multiple IP addresses, `--advertise-addr`
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must be specified so that the correct address is chosen for inter-manager
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communication and overlay networking.
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It is also possible to specify a network interface to advertise that interface's address;
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for example `--advertise-addr eth0:2377`.
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Specifying a port is optional. If the value is a bare IP address, or interface
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name, the default port 2377 will be used.
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This flag is generally not necessary when joining an existing swarm.
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### `--token string`
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Secret value required for nodes to join the swarm
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## Related information
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* [swarm init](swarm_init.md)
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* [swarm leave](swarm_leave.md)
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* [swarm update](swarm_update.md)
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