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How to Deploy a Pod in Kubernetes

This tutorial will walk you through deploying a simple pod in Kubernetes. A pod is the smallest deployable unit in Kubernetes, representing one or more containers that share the same network and storage.

Prerequisites

Before you start, make sure you have the following tools installed:

  • Minikube - for setting up a local Kubernetes cluster
  • kubectl - Kubernetes command-line tool
  • Git - to clone this repository

Setup Instructions

Step 1: Start Minikube

If you haven't already, start Minikube:

minikube start

This command will spin up a local Kubernetes cluster. It may take a few minutes, depending on your system.

Step 2: Verify Minikube is Running

Check the status of your Minikube cluster:

minikube status

You should see that the components are running correctly.

Step 3: Clone the Byte-Sized Tutorials Repository

Clone this repository to get the tutorial files:

git clone https://github.com/zashraf/byte-sized-tutorials.git
cd byte-sized-tutorials/kubernetes/03-deploy-a-pod

Step 4: Deploy the Pod

To create the pod, apply the provided YAML file:

kubectl apply -f pod.yaml

The pod.yaml file contains the following configuration:

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

This configuration creates a pod named my-first-pod that runs a container using the nginx image, with port 80 exposed.

Step 5: Check the Pod Status

Verify that the pod is running:

kubectl get pods

If the pod is running, you should see the status as Running.

Step 6: Access Nginx in the Browser

  1. Expose the Pod as a Service:

    kubectl expose pod my-first-pod --type=NodePort --port=80

  2. Get the Minikube IP and NodePort:

    • Find the Minikube IP: 
      minikube ip
    • Get the NodePort: 
      kubectl get services

    Use the Minikube IP and NodePort to access Nginx in the browser:

    http://<Minikube-IP>:<NodePort>

Step 7: Inspect the Pod Details

If you need more information about the pod or encounter any issues, describe the pod:

kubectl describe pod my-first-pod

Step 8: Clean Up

To delete the pod and service, run:

kubectl delete pod my-first-pod
kubectl delete service my-first-pod

Conclusion

Congratulations! You have successfully deployed your first pod in Kubernetes. This basic example forms the foundation for working with Kubernetes, as all higher-level components build upon pods.

Stay tuned for the next tutorial, where we’ll cover using Kubernetes deployments to manage replicas and automate updates.