Add nodes to the swarm (Engine)

Add nodes to the swarm

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

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

2. 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:

   ```bash $ 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:

   ```bash $ 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  ```
   

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

4. 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:

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

   This node joined a swarm as a worker. ```

5. 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:

   bash 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.