ebebd41769
this change improves the instructions for
swarm join-token and swarm init;
- only print the join-token command for workers
instead of for both managers and workers, to
prevent users from copying the wrong command.
An extra line is added to explain how to obtain
the manager token.
- print a message that a token was rotated
sucesfully if '--rotate' is used.
- add some extra white-space before / after
the join commands, to make copy/pasting
easier.
this change also does some refactoring of join-token;
- move flagname-constants together with other constants
- use variables for selected role ("worker" / "manager")
to prevent checking for them multiple times, and to
keep the "worker" / "manager" sting centralized
- add an extra blank line after "join-token" instructions
this makes it easier to copy, and cleans up the
code a tiny bit
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
3.9 KiB
swarm init
Usage: docker swarm init [OPTIONS]
Initialize a swarm
Options:
--advertise-addr value Advertised address (format: <ip|interface>[:port])
--cert-expiry duration Validity period for node certificates (default 2160h0m0s)
--dispatcher-heartbeat duration Dispatcher heartbeat period (default 5s)
--external-ca value Specifications of one or more certificate signing endpoints
--force-new-cluster Force create a new cluster from current state.
--help Print usage
--listen-addr value Listen address (format: <ip|interface>[:port])
--task-history-limit int Task history retention limit (default 5)
Initialize a swarm. The docker engine targeted by this command becomes a manager in the newly created single-node swarm.
$ docker swarm init --advertise-addr 192.168.99.121
Swarm initialized: current node (bvz81updecsj6wjz393c09vti) is now a manager.
To add a worker to this swarm, run the following command:
docker swarm join \
--token SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-1awxwuwd3z9j1z3puu7rcgdbx \
172.17.0.2:2377
To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.
docker swarm init generates two random tokens, a worker token and a manager token. When you join
a new node to the swarm, the node joins as a worker or manager node based upon the token you pass
to swarm join.
After you create the swarm, you can display or rotate the token using swarm join-token.
--cert-expiry
This flag sets the validity period for node certificates.
--dispatcher-heartbeat
This flags sets the frequency with which nodes are told to use as a period to report their health.
--external-ca value
This flag sets up the swarm to use an external CA to issue node certificates. The value takes
the form protocol=X,url=Y. The value for protocol specifies what protocol should be used
to send signing requests to the external CA. Currently, the only supported value is cfssl.
The URL specifies the endpoint where signing requests should be submitted.
--force-new-cluster
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.
--listen-addr value
The node listens for inbound Swarm manager traffic on this address. The default is to listen on
0.0.0.0:2377. It is also possible to specify a network interface to listen on that interface's
address; for example --listen-addr eth0:2377.
Specifying a port is optional. If the value is a bare IP address or interface name, the default port 2377 will be used.
--advertise-addr value
This flag specifies the address that will be advertised to other members of the
swarm for API access and overlay networking. If unspecified, Docker will check
if the system has a single IP address, and use that IP address with with the
listening port (see --listen-addr). If the system has multiple IP addresses,
--advertise-addr must be specified so that the correct address is chosen for
inter-manager communication and overlay networking.
It is also possible to specify a network interface to advertise that interface's address;
for example --advertise-addr eth0:2377.
Specifying a port is optional. If the value is a bare IP address or interface name, the default port 2377 will be used.
--task-history-limit
This flag sets up task history retention limit.