After you complete the tutorial setup steps, you're ready to create a swarm. Make sure the Docker Engine daemon is started on the host machines.
-
Open a terminal and ssh into the machine where you want to run your manager node. This tutorial uses a machine named
manager1
. -
Run the following command to create a new swarm:
console $ docker swarm init --advertise-addr <MANAGER-IP>
In the tutorial, the following command creates a swarm on the
manager1
machine:```console $ docker swarm init --advertise-addr 192.168.99.100 Swarm initialized: current node (dxn1zf6l61qsb1josjja83ngz) is now a manager.
To add a worker to this swarm, run the following command:
docker swarm join \ --token SWMTKN-1-49nj1cmql0jkz5s954yi3oex3nedyz0fb0xx14ie39trti4wxv-8vxv8rssmk743ojnwacrr2e7c \ 192.168.99.100:2377
To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions. ```
The
--advertise-addr
flag configures the manager node to publish its address as192.168.99.100
. The other nodes in the swarm must be able to access the manager at the IP address.The output includes the commands to join new nodes to the swarm. Nodes will join as managers or workers depending on the value for the
--token
flag. -
Run
docker info
to view the current state of the swarm:```console $ docker info
Containers: 2 Running: 0 Paused: 0 Stopped: 2 ...snip... Swarm: active NodeID: dxn1zf6l61qsb1josjja83ngz Is Manager: true Managers: 1 Nodes: 1 ...snip... ```
-
Run the
docker node ls
command to view information about nodes:```console $ docker node ls
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS dxn1zf6l61qsb1josjja83ngz * manager1 Ready Active Leader
```
The
*
next to the node ID indicates that you're currently connected on this node.Docker Engine Swarm mode automatically names the node with the machine host name. The tutorial covers other columns in later steps.
Next steps#
Next, you'll add two more nodes to the cluster.
{ { < button text="Add two more nodes" url="add-nodes.md" > } }