Day-07 - K8s Yaml

 

Day-07 - K8s Yaml

apiVersion: Day-07
metadata:
name: pod-and-yaml
publishedDate: 15/10/2025
topic: "YAML and Pods in Kubernetes"

content:
introduction: >
Explored one of the most essential building blocks of Kubernetes — YAML and Pods.
Understanding how resources are defined is key before diving into Deployments or Services.

yamlOverview:
description: "YAML is clean, readable, intuitive, and preferred for Kubernetes configs."
features:
- Comments with "#"
- Key-value pairs, lists, dictionaries
- File extensions: .yaml or .yml

podCreation:
imperative:
description: "Quick commands to create resources, perfect for learning."
example: "kubectl run nginx --image=nginx"
declarative:
description: "Configuration files (YAML/JSON) applied with kubectl, preferred for production."
example:
apiVersion: v1
kind: Pod
metadata:
name: nginx-pod
labels:
env: test
type: frontend
spec:
containers:
- name: nginx-container
image: nginx
ports:
- containerPort: 80
applyCommand: "kubectl apply -f pod.yaml"

usefulCommands:
- "kubectl describe pod <pod_name>"
- "kubectl get pods -o wide"
- "kubectl explain pod"
- "kubectl run nginx --image=nginx --dry-run=client -o yaml > new-pod.yaml"

keyTakeaways:
- YAML is the language of Kubernetes.
- Pods are the smallest deployable unit.
- Imperative for learning, declarative for production.
- Labels and metadata help organize resources.

read More: https://lnkd.in/drEjaPZ3