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Setting up a Kubernetes Cluster with Docker

Docker works well for running single containers or small groups of containers on a single host. But what if you have more than a few containers, or want those containers to be spread across multiple servers, or even made highly available? For these scenarios, you'll need a container orchestrator. Kubernetes is a popular container orchestration framework that easily works with Docker. In this lab, you'll learn to set up a Kubernetes cluster with Docker.

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Path Info

Clock icon Intermediate
Clock icon 1h 0m
Clock icon Nov 07, 2018

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Table of Contents

  1. Challenge

    Install Kubernetes

    Inspect the Docker environment before you install Kubernetes, both to make sure it is installed, and to show what is currently running for comparison later.

    1. Add the Kubernetes yum repo to every host.
    2. Set SELinux to permissive mode.
    3. Install the Kubernetes utilities: kubelet, kubeadm, and kubectl.
    4. Enable the kubelet service.
  2. Challenge

    Set up the Kubernetes Cluster

    Inspect the Docker environment again. See what has changed.

    1. Create a cluster on the Controller node.
    2. Join the cluster on the Worker nodes.
    3. Add a network fabric to the cluster.
  3. Challenge

    Test the Cluster

    Inspect the Docker environment again. What is running now that wasn't before?

    1. Create an Nginx pod and run it on the cluster.
    2. Create a NodePort service for the Nginx pod.
    3. View the Nginx pod in a browser.

    Look at the Docker environment one more time. Notice that even though you started the pod with Kubernetes, it is running the containers using Docker. The worker node where the pod is running will have a container with a name that includes the name of your pod.

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

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