Create and Manage Kubernetes Pods Using Declarative Approach¶

Let's see how you can create and manage kubernetes Pods declaratively.

Here is the Docker Image used in this tutorial: reyanshkharga/nginx

Step 1: Create Pod Manifest¶

First, we need to write the pod manifest as follows:

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11

apiVersion: v1
kind: Pod
metadata:
name: my-pod
spec:
containers:
- name: my-container
  image: reyanshkharga/nginx:v1
  imagePullPolicy: Always
  ports:
  - containerPort: 80

Required fields:

• apiVersion - Which version of the Kubernetes API you're using to create this object.
• kind - What kind of object you want to create.
• metadata - Data that helps uniquely identify the object, including a name string, UID , and - optional namespace.
• spec - What state you desire for the object.

Step 2: Create Pod¶

Let's use kubectl apply to apply the manifest and create the pod:

# Create pod
kubectl apply -f my-pod.yml

Step 3: List Pods¶

List pods and verify that the pod we created is up and running:

kubectl get pods

Step 4: Verify Application¶

Verify that the application in the container inside the pod is running properly:

# Start shell session inside the container
kubectl exec -it my-pod -- curl localhost

# Access application
curl localhost

Also, let's use kubectl port-forward to access the application locally:

kubectl port-forward my-pod 5000:80

Open any browser and visit localhost:5000.

Step 5: Delete Pod¶

# Delete the pod
kubectl delete -f my-pod.yml