github.com/sld880311/docker@v0.0.0-20200524143708-d5593973a475/docs/reference/commandline/swarm_join.md (about)

     1  ---
     2  title: "swarm join"
     3  description: "The swarm join command description and usage"
     4  keywords: "swarm, join"
     5  ---
     6  
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    15  
    16  # swarm join
    17  
    18  ```markdown
    19  Usage:  docker swarm join [OPTIONS] HOST:PORT
    20  
    21  Join a swarm as a node and/or manager
    22  
    23  Options:
    24        --advertise-addr string   Advertised address (format: <ip|interface>[:port])
    25        --help                    Print usage
    26        --listen-addr node-addr   Listen address (format: <ip|interface>[:port]) (default 0.0.0.0:2377)
    27        --token string            Token for entry into the swarm
    28  ```
    29  
    30  ## Description
    31  
    32  Join a node to a swarm. The node joins as a manager node or worker node based upon the token you
    33  pass with the `--token` flag. If you pass a manager token, the node joins as a manager. If you
    34  pass a worker token, the node joins as a worker.
    35  
    36  ## Examples
    37  
    38  ### Join a node to swarm as a manager
    39  
    40  The example below demonstrates joining a manager node using a manager token.
    41  
    42  ```bash
    43  $ docker swarm join --token SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-7p73s1dx5in4tatdymyhg9hu2 192.168.99.121:2377
    44  This node joined a swarm as a manager.
    45  $ docker node ls
    46  ID                           HOSTNAME  STATUS  AVAILABILITY  MANAGER STATUS
    47  dkp8vy1dq1kxleu9g4u78tlag *  manager2  Ready   Active        Reachable
    48  dvfxp4zseq4s0rih1selh0d20    manager1  Ready   Active        Leader
    49  ```
    50  
    51  A cluster should only have 3-7 managers at most, because a majority of managers must be available
    52  for the cluster to function. Nodes that aren't meant to participate in this management quorum
    53  should join as workers instead. Managers should be stable hosts that have static IP addresses.
    54  
    55  ### Join a node to swarm as a worker
    56  
    57  The example below demonstrates joining a worker node using a worker token.
    58  
    59  ```bash
    60  $ docker swarm join --token SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-1awxwuwd3z9j1z3puu7rcgdbx 192.168.99.121:2377
    61  This node joined a swarm as a worker.
    62  $ docker node ls
    63  ID                           HOSTNAME  STATUS  AVAILABILITY  MANAGER STATUS
    64  7ln70fl22uw2dvjn2ft53m3q5    worker2   Ready   Active
    65  dkp8vy1dq1kxleu9g4u78tlag    worker1   Ready   Active        Reachable
    66  dvfxp4zseq4s0rih1selh0d20 *  manager1  Ready   Active        Leader
    67  ```
    68  
    69  ### `--listen-addr value`
    70  
    71  If the node is a manager, it will listen for inbound swarm manager traffic on this
    72  address. The default is to listen on 0.0.0.0:2377. It is also possible to specify a
    73  network interface to listen on that interface's address; for example `--listen-addr eth0:2377`.
    74  
    75  Specifying a port is optional. If the value is a bare IP address, or interface
    76  name, the default port 2377 will be used.
    77  
    78  This flag is generally not necessary when joining an existing swarm.
    79  
    80  ### `--advertise-addr value`
    81  
    82  This flag specifies the address that will be advertised to other members of the
    83  swarm for API access. If unspecified, Docker will check if the system has a
    84  single IP address, and use that IP address with the listening port (see
    85  `--listen-addr`). If the system has multiple IP addresses, `--advertise-addr`
    86  must be specified so that the correct address is chosen for inter-manager
    87  communication and overlay networking.
    88  
    89  It is also possible to specify a network interface to advertise that interface's address;
    90  for example `--advertise-addr eth0:2377`.
    91  
    92  Specifying a port is optional. If the value is a bare IP address, or interface
    93  name, the default port 2377 will be used.
    94  
    95  This flag is generally not necessary when joining an existing swarm.
    96  
    97  ### `--token string`
    98  
    99  Secret value required for nodes to join the swarm
   100  
   101  
   102  ## Related commands
   103  
   104  * [swarm init](swarm_init.md)
   105  * [swarm leave](swarm_leave.md)
   106  * [swarm update](swarm_update.md)