Installing Docker Swarm on OpenBSD

Docker Swarm is a clustering and scheduling tool for Docker containers. In this tutorial, we will go through the steps required to install Docker Swarm on an OpenBSD system.

Prerequisites

Before we begin, you will need:

• A machine running OpenBSD
• A user account with sudo privileges

Steps

1. Install Docker

Docker Swarm is a component of the Docker Engine, so the first step is to install Docker on your system. For OpenBSD, the process is as follows:

# sudo pkg_add docker

This will download and install the Docker package.

Verify that the installation was successful by running the following command:

$ docker version

You should see output similar to this:

Client:
 Version:      18.09.0-ce
 API version:  1.39
 Go version:   go1.10.4
 Git commit:   4d60db4
 Built:        Wed Nov  7 00:37:27 2018
 OS/Arch:      linux/amd64
 Experimental: false

Server:
 Engine:
  Version:      18.09.0-ce
  API version:  1.39 (minimum version 1.12)
  Go version:   go1.10.4
  Git commit:   4d60db4
  Built:        Wed Nov  7 00:36:31 2018
  OS/Arch:      linux/amd64
  Experimental: false

2. Initialize Docker Swarm

With Docker installed, we can now initialize Docker Swarm by running the following command:

$ sudo docker swarm init --advertise-addr <your-ip-address>

This will activate Docker Swarm mode and set up a Swarm manager node on your system. The advertise-addr parameter specifies the IP address of the node, which is needed for other nodes to join the Swarm.

The output of this command will display the command needed to join the Swarm as a worker or a manager. Make sure to keep this command handy.

3. Join the Swarm

To add more nodes to the Swarm, you need to run the command provided in the output of the previous step on each node.

Run this command on each additional node that you want to add to the Swarm:

$ sudo docker swarm join --token <join-token> <manager-ip-address>:<manager-port>

Replace <join-token> with the token provided in the previous step, and <manager-ip-address> with the IP address of the Swarm manager.

Once a node has joined the Swarm, it can be listed using the following command:

$ sudo docker node ls

This will display the nodes that have joined the Swarm.

Conclusion

In this tutorial, we covered the steps required to install and configure Docker Swarm on an OpenBSD system. With Docker Swarm, you can easily distribute and manage containers across multiple nodes, providing scalability and redundancy to your applications.

If you want to self-host in an easy, hands free way, need an external IP address, or simply want your data in your own hands, give IPv6.rs a try!

Alternatively, for the best virtual desktop, try Shells!