miniKube

1. What is minikube?

2. minikube is a tool that quickly sets up a local Kubernetes cluster on macOS, Linux, and Windows. It can deploy as a VM, a container, or on bare metal.

3. To be precise, it is a one-node Cluster that runs on a virtual box used for testing purposes.

4. minikube is local Kubernetes, focusing on making it easy to learn and develop for Kubernetes.

5. This makes it an interesting option for users who are new to containers, and also for projects in the world of edge computing and the Internet of Things.

   Features of minikube

   1. Cross-platform (Linux, macOS, Windows)

   2. Deploy as a VM, a container, or on bare-metal

   3. Multiple container runtimes (CRI-O, containers, docker)

   4. Direct API endpoint for blazing-fast image load and build

   5. Advanced features such as LoadBalancer, filesystem mounts, FeatureGates, and network policy

   6. Addons for easily installed Kubernetes applications

   7. Supports common CI environments

Task1: Installation of Minikube

1. make sure docker is installed in your local environment.

   you can install it with this command

    sudo apt install docker.io
   
    //start docker
    sudo systemctl start docker
   

   you can verify by running the command

    sudo systemctl status docker
   

2. Now download minikube binary(for ubuntu 22.04 (it x86-64 architecture) file from the official Kubernetes site: https://minikube.sigs.k8s.io/docs/start/

3. Now run the following command to install minikube

    curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64
    sudo install minikube-linux-amd64 /usr/local/bin/minikube
   

4. now start minikube with this command

    minikube start
   

   it will show on the terminal like this:

minikube comes with kubectl in-build installed which helps us to interact with the containers running on minikube.

minikube CLI -> used to start/delete the cluster

kubectl CLI -> used to configure the minikube cluster

Task2: Launching a nginx pod on minikube

1. Start by ensuring that Minikube is running. Open a terminal or command prompt and start Minikube by running the following command: minikube start

2. Once Minikube is running, you can create an nginx pod using a YAML manifest. Create a file called nginx-pod.yaml and open it in a text editor. Paste the following YAML configuration into the file:

   

3. Kubernetes will create the pod based on the manifest. You can check the status of the pod by running:

    kubectl get pods
   

   You should see the nginx-pod list with a status of "Running".

   

4. To access the nginx service running inside the pod, you need to expose the pod as a service. You can use the following command:

    kubectl expose pod nginx-pod --type=NodePort --port=80
   

   #NOTE

   here, an error can be shown if the nginx-pod is not labeled.

   make sure under the metadata add a labels section with the app: nginx.

    apiVersion: v1
    kind: Pod
    metadata:
      name: nginx-pod
      labels:
        app: nginx
    spec:
      containers:
        - name: nginx
          image: nginx
          ports:
            - containerPort: 80
   

5. To get the URL to access the nginx service, run the following command:

    minikube service nginx-pod --url
   

congratulation!!💜we have created an Nginx pod in minikube.

Happy learning!