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The server's Swarm state. This a singleton that must be reloaded to get
the current state of the Swarm.
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The version number of the swarm. If this is not the same as the
server, the :py:meth:`update` function will not work and you will
need to call :py:meth:`reload` before calling it again.
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Initialize a new swarm on this Engine.
Args:
advertise_addr (str): Externally reachable address advertised to
other nodes. This can either be an address/port combination in
the form ``192.168.1.1:4567``, or an interface followed by a
port number, like ``eth0:4567``. If the port number is omitted,
the port number from the listen address is used.
If not specified, it will be automatically detected when
possible.
listen_addr (str): Listen address used for inter-manager
communication, as well as determining the networking interface
used for the VXLAN Tunnel Endpoint (VTEP). This can either be
an address/port combination in the form ``192.168.1.1:4567``,
or an interface followed by a port number, like ``eth0:4567``.
If the port number is omitted, the default swarm listening port
is used. Default: ``0.0.0.0:2377``
force_new_cluster (bool): Force creating a new Swarm, even if
already part of one. Default: False
default_addr_pool (list of str): Default Address Pool specifies
default subnet pools for global scope networks. Each pool
should be specified as a CIDR block, like '10.0.0.0/8'.
Default: None
subnet_size (int): SubnetSize specifies the subnet size of the
networks created from the default subnet pool. Default: None
data_path_addr (string): Address or interface to use for data path
traffic. For example, 192.168.1.1, or an interface, like eth0.
data_path_port (int): Port number to use for data path traffic.
Acceptable port range is 1024 to 49151. If set to ``None`` or
0, the default port 4789 will be used. Default: None
task_history_retention_limit (int): Maximum number of tasks
history stored.
snapshot_interval (int): Number of logs entries between snapshot.
keep_old_snapshots (int): Number of snapshots to keep beyond the
current snapshot.
log_entries_for_slow_followers (int): Number of log entries to
keep around to sync up slow followers after a snapshot is
created.
heartbeat_tick (int): Amount of ticks (in seconds) between each
heartbeat.
election_tick (int): Amount of ticks (in seconds) needed without a
leader to trigger a new election.
dispatcher_heartbeat_period (int): The delay for an agent to send
a heartbeat to the dispatcher.
node_cert_expiry (int): Automatic expiry for nodes certificates.
external_ca (dict): Configuration for forwarding signing requests
to an external certificate authority. Use
``docker.types.SwarmExternalCA``.
name (string): Swarm's name
labels (dict): User-defined key/value metadata.
signing_ca_cert (str): The desired signing CA certificate for all
swarm node TLS leaf certificates, in PEM format.
signing_ca_key (str): The desired signing CA key for all swarm
node TLS leaf certificates, in PEM format.
ca_force_rotate (int): An integer whose purpose is to force swarm
to generate a new signing CA certificate and key, if none have
been specified.
autolock_managers (boolean): If set, generate a key and use it to
lock data stored on the managers.
log_driver (DriverConfig): The default log driver to use for tasks
created in the orchestrator.
Returns:
(str): The ID of the created node.
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
Example:
>>> client.swarm.init(
advertise_addr='eth0', listen_addr='0.0.0.0:5000',
force_new_cluster=False, default_addr_pool=['10.20.0.0/16],
subnet_size=24, snapshot_interval=5000,
log_entries_for_slow_followers=1200
)
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Inspect the swarm on the server and store the response in
:py:attr:`attrs`.
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
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Update the swarm's configuration.
It takes the same arguments as :py:meth:`init`, except
``advertise_addr``, ``listen_addr``, and ``force_new_cluster``. In
addition, it takes these arguments:
Args:
rotate_worker_token (bool): Rotate the worker join token. Default:
``False``.
rotate_manager_token (bool): Rotate the manager join token.
Default: ``False``.
rotate_manager_unlock_key (bool): Rotate the manager unlock key.
Default: ``False``.
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
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