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Minikube: Using Local Storage

In this hands-on lab, we will be creating a static volume and then mapping that volume into our pod on our Kubernetes cluster. We will be using predefined YAML files for this, and manually building each object from those files.

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Path Info

Clock icon Beginner
Clock icon 30m
Clock icon Nov 26, 2019

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Table of Contents

  1. Challenge

    Start the Minikube Cluster (Remember to Use the Correct Driver)

    Issue this command:

    sudo minikube start --vm-driver none
  2. Challenge

    Using the Provided YAML Files, Create a Volume with a Local Mapping and then a Claim and Pod for that Volume

    Locate the local folder in the cloud_user home directory, and get into it:

    cd local

    In this directory inspect the pv-hostPath-volume.yaml (with cat) and locate the local mapping:

    path: "/home/cloud_user/html"

    Create the directory indicated in the hostPath:

    mkdir /home/cloud_user/html

    In this directory create an index.html file:

    echo 'this is the local index' >> /home/cloud_user/html/index.html

    Create the volume and PersistentVolumeClaim and ensure that they are bound:

    sudo kubectl apply -f /home/cloud_user/local/pv-hostPath-volume.yaml
    sudo kubectl apply -f /home/cloud_user/local/pv-hostPath-claim.yaml
    sudo kubectl get pv  # this output should show the volume status as Available
    sudo kubectl get pvc # this output should show Bound

    Now let's create the Nginx pod and then run curl on the pod IP to ensure that the custom index loads:

    sudo kubectl apply -f /home/cloud_user/local/pv-hostPath-pod.yaml
    sudo kubectl get po -o wide

    There's going to be an IP address in the output of that command. We need it in this next command:

    curl <IP_ADDRESS>

    We should see what we put in the index.html file earlier. Now, to see the power of what we've done here, let's append to that file:

    echo 'this is a new line' >> /home/cloud_user/html/index.html

    Then we'll run that curl command again, and see that our new content is showing up -- without having to restart the container!

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