Docker Swarm is a tool that allows you to run and manage your Docker containers across multiple hosts. We will go through the steps of installing Docker Swarm on POP! OS Latest, which is an Ubuntu-based operating system.
Before we get started, make sure you have the following:
The first step is to install Docker on your system using the following commands:
sudo apt-get update
sudo apt-get install docker.io
This will install the Docker package on your system.
Next, you need to create a Docker Swarm cluster. To do this, run the following command:
sudo docker swarm init
This will create a new Swarm cluster and generate a join token that you can use to add additional nodes to the cluster.
After the cluster has been created, you can verify it by running the following command:
sudo docker node ls
This will display a list of nodes in the Swarm cluster.
Now that your Swarm cluster is up and running, you can deploy a simple service to it. To do this, create a Docker Compose file with the following contents:
version: "3"
services:
web:
image: nginx
ports:
- "80:80"
deploy:
replicas: 3
Save the file as docker-compose.yml.
Next, run the following command to deploy the service:
sudo docker stack deploy -c docker-compose.yml myapp
This will deploy the service to the Swarm cluster.
You can verify that the service is running by running the following command:
sudo docker stack ps myapp
This will display a list of tasks and their statuses. You should see that your service is running.
In this tutorial, you learned how to install Docker Swarm on POP! OS Latest, create a Swarm cluster, deploy a service, and verify that the service is running. With Docker Swarm, you can easily manage your Docker containers across multiple hosts.
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