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Sebastiaan van Stijn f03613aded Improve swarm join-token instructions

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>
Upstream-commit: ebebd4176940bc907ba4e8f5fbe62f6a050f8ed4
Component: engine

2016-08-02 16:44:02 +02:00

2.6 KiB

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Add nodes to the swarm

Once you've created a swarm with a manager node, you're ready to add worker nodes.

Open a terminal and ssh into the machine where you want to run a worker node. This tutorial uses the name worker1.

Run the command produced by the docker swarm init output from the Create a swarm tutorial step to create a worker node joined to the existing swarm:

$ docker swarm join \
  --token  SWMTKN-1-49nj1cmql0jkz5s954yi3oex3nedyz0fb0xx14ie39trti4wxv-8vxv8rssmk743ojnwacrr2e7c \
  192.168.99.100:2377

This node joined a swarm as a worker.

If you don't have the command available, you can run the following command on a manager node to retrieve the join command for a worker:

$ docker swarm join-token worker

To add a worker to this swarm, run the following command:

    docker swarm join \
    --token SWMTKN-1-49nj1cmql0jkz5s954yi3oex3nedyz0fb0xx14ie39trti4wxv-8vxv8rssmk743ojnwacrr2e7c \
    192.168.99.100:2377

Open a terminal and ssh into the machine where you want to run a second worker node. This tutorial uses the name worker2.

Run the command produced by the docker swarm init output from the Create a swarm tutorial step to create a second worker node joined to the existing swarm:

$ docker swarm join \
  --token SWMTKN-1-49nj1cmql0jkz5s954yi3oex3nedyz0fb0xx14ie39trti4wxv-8vxv8rssmk743ojnwacrr2e7c \
  192.168.99.100:2377

This node joined a swarm as a worker.

Open a terminal and ssh into the machine where the manager node runs and run the docker node ls command to see the worker nodes:
```
ID                           HOSTNAME  STATUS  AVAILABILITY  MANAGER STATUS
03g1y59jwfg7cf99w4lt0f662    worker2   Ready   Active
9j68exjopxe7wfl6yuxml7a7j    worker1   Ready   Active
dxn1zf6l61qsb1josjja83ngz *  manager1  Ready   Active        Leader
```
The MANAGER column identifies the manager nodes in the swarm. The empty status in this column for worker1 and worker2 identifies them as worker nodes.

Swarm management commands like docker node ls only work on manager nodes.

What's next?

Now your swarm consists of a manager and two worker nodes. In the next step of the tutorial, you deploy a service to the swarm.

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Add nodes to the swarm

What's next?

2.6 KiB

Raw Blame History