How do I create a Kubernetes deployment YAML file?

How do I create a Kubernetes deployment YAML file?

To create a Kubernetes deployment YAML file, you need to define the apiVersion, kind, metadata, and spec sections.

Can you give me a sample YAML file for a simple web application?

Sure! Here's a basic example:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-web-app
spec:
  replicas: 3
  selector:
    matchLabels:
      app: my-web-app
  template:
    metadata:
      labels:
        app: my-web-app
    spec:
      containers:
      - name: web
        image: nginx:latest
        ports:
        - containerPort: 80

What does each section of the YAML file do?

The apiVersion specifies the version of the Kubernetes API, kind defines the type of resource, metadata contains information like the name, and spec outlines the desired state of the deployment.

How can I update the deployment after making changes?

You can update the deployment by modifying the YAML file and then applying the changes using the command kubectl apply -f your-deployment.yaml.