2.4 KiB
swarm join
Usage: docker swarm join [OPTIONS] HOST:PORT
Join a swarm as a node and/or manager
Options:
--help Print usage
--listen-addr value Listen address (default 0.0.0.0:2377)
--token string Token for entry into the swarm
Join a node to a swarm. The node joins as a manager node or worker node based upon the token you
pass with the --token flag. If you pass a manager token, the node joins as a manager. If you
pass a worker token, the node joins as a worker.
Join a node to swarm as a manager
The example below demonstrates joining a manager node using a manager token.
$ docker swarm join --token SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-7p73s1dx5in4tatdymyhg9hu2 --listen-addr 192.168.99.122:2377 192.168.99.121:2377
This node joined a swarm as a manager.
$ docker node ls
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS
dkp8vy1dq1kxleu9g4u78tlag * manager2 Ready Active Reachable
dvfxp4zseq4s0rih1selh0d20 manager1 Ready Active Leader
A cluster should only have 3-7 managers at most, because a majority of managers must be available for the cluster to function. Nodes that aren't meant to participate in this management quorum should join as workers instead. Managers should be stable hosts that have static IP addresses.
Join a node to swarm as a worker
The example below demonstrates joining a worker node using a worker token.
$ docker swarm join --token SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-1awxwuwd3z9j1z3puu7rcgdbx --listen-addr 192.168.99.123:2377 192.168.99.121:2377
This node joined a swarm as a worker.
$ docker node ls
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS
7ln70fl22uw2dvjn2ft53m3q5 worker2 Ready Active
dkp8vy1dq1kxleu9g4u78tlag worker1 Ready Active Reachable
dvfxp4zseq4s0rih1selh0d20 * manager1 Ready Active Leader
--listen-addr value
The node listens for inbound swarm manager traffic on this IP:PORT
--token string
Secret value required for nodes to join the swarm