# Day3: Deep Dive into Kubernetes Pods

## What is a Pod?

A pod groups one or more containers and is a core building block on Kubernetes architecture. Ex: K8s can automatically replace a pod when it goes down, add CPU and memory to it when it is needed within k8s cluster, or even replicate it to scale out. Pods are assigned IP addresses.

### Multi-container Pod

A pod that runs more than one container together on the same node, sharing the same network(IP and port space) and storage volumes, it is mainly used when containers need to work together, like part of same service that must share data or communicate via localhost.

### Pods Overview

![](https://kubernetes.io/docs/tutorials/kubernetes-basics/public/images/module_03_pods.svg align="left")

### Pods Lifecycle and Troubleshooting Phases

![](https://cdn.hashnode.com/res/hashnode/image/upload/v1760028732850/23a424b9-78a7-4a6b-8546-1a484480c9aa.png align="center")

## Pod Creation

### Create Pod YAML file

* nginx-pod.yaml
    
* ```yaml
        apiVersion: v1
        kind: Pod
        metadata:
          name: nginx-pod
          labels:
            app: web
        spec:
          containers:
            - name: nginx-container
              image: nginx:latest
              ports:
                - containerPort: 80
    ```
    

### Apply the Pod

* Run the command to create the pod
    
* ```bash
        kubectl apply -f nginx-pod.yaml
    ```
    

### Verify Pod Status

* Check if pod is running
    
    ```bash
    kubectl get pods
    ```
    
    logs
    
* ```sql
        NAME         READY   STATUS    RESTARTS   AGE
        nginx-pod    1/1     Running   0          10s
    ```
    
    ### Access Pod for Testing
    
    Use port forwarding to access the Nginx page:
    
* ```bash
        kubectl port-forward pod/nginx-pod 8080:80
        Check: http://localhost:8080
    ```
    

### Describe Pod Details

```bash
kubectl describe pod nginx-pod
```