github.com/flavio/docker@v0.1.3-0.20170117145210-f63d1a6eec47/docs/reference/commandline/swarm_init.md (about)

     1  ---
     2  title: "swarm init"
     3  description: "The swarm init command description and usage"
     4  keywords: "swarm, init"
     5  ---
     6  
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    15  
    16  # swarm init
    17  
    18  ```markdown
    19  Usage:  docker swarm init [OPTIONS]
    20  
    21  Initialize a swarm
    22  
    23  Options:
    24        --advertise-addr string           Advertised address (format: <ip|interface>[:port])
    25        --autolock                        Enable manager autolocking (requiring an unlock key to start a stopped manager)
    26        --availability string             Availability of the node (active/pause/drain) (default "active")
    27        --cert-expiry duration            Validity period for node certificates (ns|us|ms|s|m|h) (default 2160h0m0s)
    28        --dispatcher-heartbeat duration   Dispatcher heartbeat period (ns|us|ms|s|m|h) (default 5s)
    29        --external-ca external-ca         Specifications of one or more certificate signing endpoints
    30        --force-new-cluster               Force create a new cluster from current state
    31        --help                            Print usage
    32        --listen-addr node-addr           Listen address (format: <ip|interface>[:port]) (default 0.0.0.0:2377)
    33        --max-snapshots uint              Number of additional Raft snapshots to retain
    34        --snapshot-interval uint          Number of log entries between Raft snapshots (default 10000)
    35        --task-history-limit int          Task history retention limit (default 5)
    36  ```
    37  
    38  Initialize a swarm. The docker engine targeted by this command becomes a manager
    39  in the newly created single-node swarm.
    40  
    41  
    42  ```bash
    43  $ docker swarm init --advertise-addr 192.168.99.121
    44  Swarm initialized: current node (bvz81updecsj6wjz393c09vti) is now a manager.
    45  
    46  To add a worker to this swarm, run the following command:
    47  
    48      docker swarm join \
    49      --token SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-1awxwuwd3z9j1z3puu7rcgdbx \
    50      172.17.0.2:2377
    51  
    52  To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.
    53  ```
    54  
    55  `docker swarm init` generates two random tokens, a worker token and a manager token. When you join
    56  a new node to the swarm, the node joins as a worker or manager node based upon the token you pass
    57  to [swarm join](swarm_join.md).
    58  
    59  After you create the swarm, you can display or rotate the token using
    60  [swarm join-token](swarm_join_token.md).
    61  
    62  ### `--autolock`
    63  
    64  This flag enables automatic locking of managers with an encryption key. The
    65  private keys and data stored by all managers will be protected by the
    66  encryption key printed in the output, and will not be accessible without it.
    67  Thus, it is very important to store this key in order to activate a manager
    68  after it restarts. The key can be passed to `docker swarm unlock` to reactivate
    69  the manager. Autolock can be disabled by running
    70  `docker swarm update --autolock=false`. After disabling it, the encryption key
    71  is no longer required to start the manager, and it will start up on its own
    72  without user intervention.
    73  
    74  ### `--cert-expiry`
    75  
    76  This flag sets the validity period for node certificates.
    77  
    78  ### `--dispatcher-heartbeat`
    79  
    80  This flag sets the frequency with which nodes are told to use as a
    81  period to report their health.
    82  
    83  ### `--external-ca`
    84  
    85  This flag sets up the swarm to use an external CA to issue node certificates. The value takes
    86  the form `protocol=X,url=Y`. The value for `protocol` specifies what protocol should be used
    87  to send signing requests to the external CA. Currently, the only supported value is `cfssl`.
    88  The URL specifies the endpoint where signing requests should be submitted.
    89  
    90  ### `--force-new-cluster`
    91  
    92  This flag forces an existing node that was part of a quorum that was lost to restart as a single node Manager without losing its data.
    93  
    94  ### `--listen-addr`
    95  
    96  The node listens for inbound swarm manager traffic on this address. The default is to listen on
    97  0.0.0.0:2377. It is also possible to specify a network interface to listen on that interface's
    98  address; for example `--listen-addr eth0:2377`.
    99  
   100  Specifying a port is optional. If the value is a bare IP address or interface
   101  name, the default port 2377 will be used.
   102  
   103  ### `--advertise-addr`
   104  
   105  This flag specifies the address that will be advertised to other members of the
   106  swarm for API access and overlay networking. If unspecified, Docker will check
   107  if the system has a single IP address, and use that IP address with the
   108  listening port (see `--listen-addr`). If the system has multiple IP addresses,
   109  `--advertise-addr` must be specified so that the correct address is chosen for
   110  inter-manager communication and overlay networking.
   111  
   112  It is also possible to specify a network interface to advertise that interface's address;
   113  for example `--advertise-addr eth0:2377`.
   114  
   115  Specifying a port is optional. If the value is a bare IP address or interface
   116  name, the default port 2377 will be used.
   117  
   118  ### `--task-history-limit`
   119  
   120  This flag sets up task history retention limit.
   121  
   122  ### `--max-snapshots`
   123  
   124  This flag sets the number of old Raft snapshots to retain in addition to the
   125  current Raft snapshots. By default, no old snapshots are retained. This option
   126  may be used for debugging, or to store old snapshots of the swarm state for
   127  disaster recovery purposes.
   128  
   129  ### `--snapshot-interval`
   130  
   131  This flag specifies how many log entries to allow in between Raft snapshots.
   132  Setting this to a higher number will trigger snapshots less frequently.
   133  Snapshots compact the Raft log and allow for more efficient transfer of the
   134  state to new managers. However, there is a performance cost to taking snapshots
   135  frequently.
   136  
   137  ### `--availability`
   138  
   139  This flag specifies the availability of the node at the time the node joins a master.
   140  Possible availability values are `active`, `pause`, or `drain`.
   141  
   142  This flag is useful in certain situations. For example, a cluster may want to have
   143  dedicated manager nodes that are not served as worker nodes. This could be achieved
   144  by passing `--availability=drain` to `docker swarm init`.
   145  
   146  
   147  ## Related information
   148  
   149  * [swarm join](swarm_join.md)
   150  * [swarm join-token](swarm_join_token.md)
   151  * [swarm leave](swarm_leave.md)
   152  * [swarm unlock](swarm_unlock.md)
   153  * [swarm unlock-key](swarm_unlock_key.md)
   154  * [swarm update](swarm_update.md)