Deployment with Service - Kubernetes Typing CST Test

Deployment with Service — Kubernetes Code

Demonstrates complete Kubernetes application deployment with configuration, secrets, services, and auto-scaling.

# Namespace
apiVersion: v1
kind: Namespace
metadata:
	name: my-app
	labels:
		name: my-app

---
# ConfigMap for application configuration
apiVersion: v1
kind: ConfigMap
metadata:
	name: app-config
	namespace: my-app
data:
	DATABASE_HOST: "postgres-service"
	DATABASE_PORT: "5432"
	REDIS_HOST: "redis-service"
	REDIS_PORT: "6379"

---
# Secret for sensitive data
apiVersion: v1
kind: Secret
metadata:
	name: app-secrets
	namespace: my-app
type: Opaque
data:
	DATABASE_PASSWORD: cGFzc3dvcmQxMjM=  # base64 encoded
	API_KEY: YWJjZGVmZ2hpams=

---
# Deployment
apiVersion: apps/v1
kind: Deployment
metadata:
	name: my-app-deployment
	namespace: my-app
	labels:
		app: my-app
spec:
	replicas: 3
	selector:
		matchLabels:
		app: my-app
	template:
		metadata:
		labels:
		app: my-app
		spec:
		containers:
		- name: my-app
		image: my-app:latest
		ports:
		- containerPort: 3000
		env:
		- name: DATABASE_HOST
		valueFrom:
		configMapKeyRef:
		name: app-config
		key: DATABASE_HOST
		- name: DATABASE_PASSWORD
		valueFrom:
		secretKeyRef:
		name: app-secrets
		key: DATABASE_PASSWORD
		resources:
		requests:
		memory: "256Mi"
		cpu: "200m"
		limits:
		memory: "512Mi"
		cpu: "500m"
		livenessProbe:
		httpGet:
		path: /health
		port: 3000
		initialDelaySeconds: 30
		periodSeconds: 10
		readinessProbe:
		httpGet:
		path: /ready
		port: 3000
		initialDelaySeconds: 5
		periodSeconds: 5

---
# Service
apiVersion: v1
kind: Service
metadata:
	name: my-app-service
	namespace: my-app
spec:
	selector:
		app: my-app
	ports:
	- protocol: TCP
		port: 80
		targetPort: 3000
	type: LoadBalancer

---
# Horizontal Pod Autoscaler
apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
	name: my-app-hpa
	namespace: my-app
spec:
	scaleTargetRef:
		apiVersion: apps/v1
		kind: Deployment
		name: my-app-deployment
	minReplicas: 2
	maxReplicas: 10
	metrics:
	- type: Resource
		resource:
		name: cpu
		target:
		type: Utilization
		averageUtilization: 70
	- type: Resource
		resource:
		name: memory
		target:
		type: Utilization
		averageUtilization: 80

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Kubernetes is an open-source container orchestration platform that automates the deployment, scaling, and management of containerized applications across clusters of machines.

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