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devops/kubernetes/deployment.yaml

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+apiVersion: v1
+kind: Namespace
+metadata:
+    name: noteapp
+
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+    name: mongodb-pvc
+    namespace: noteapp
+spec:
+    accessModes:
+        - ReadWriteOnce
+    resources:
+        requests:
+            storage: 10Gi
+
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+    name: app-config
+    namespace: noteapp
+data:
+    MONGODB_URI: "mongodb://admin:password@mongodb:27017/noteapp?authSource=admin"
+    JWT_SECRET: "your-super-secret-jwt-key-change-in-production"
+    ENCRYPTION_KEY: "00000000000000000000000000000000"
+    PORT: "8080"
+
+---
+apiVersion: v1
+kind: Secret
+metadata:
+    name: mongodb-credentials
+    namespace: noteapp
+type: Opaque
+stringData:
+    username: admin
+    password: password
+
+---
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+    name: mongodb
+    namespace: noteapp
+spec:
+    serviceName: mongodb
+    replicas: 1
+    selector:
+        matchLabels:
+            app: mongodb
+    template:
+        metadata:
+            labels:
+                app: mongodb
+        spec:
+            containers:
+                - name: mongodb
+                  image: mongo:7.0-alpine
+                  ports:
+                      - containerPort: 27017
+                        name: mongodb
+                  env:
+                      - name: MONGO_INITDB_ROOT_USERNAME
+                        valueFrom:
+                            secretKeyRef:
+                                name: mongodb-credentials
+                                key: username
+                      - name: MONGO_INITDB_ROOT_PASSWORD
+                        valueFrom:
+                            secretKeyRef:
+                                name: mongodb-credentials
+                                key: password
+                  volumeMounts:
+                      - name: mongodb-storage
+                        mountPath: /data/db
+                  livenessProbe:
+                      exec:
+                          command:
+                              - mongosh
+                              - mongodb://admin:password@localhost:27017/admin?authSource=admin
+                              - --quiet
+                              - --eval
+                              - db.adminCommand('ping').ok
+                      initialDelaySeconds: 30
+                      periodSeconds: 10
+                  readinessProbe:
+                      exec:
+                          command:
+                              - mongosh
+                              - mongodb://admin:password@localhost:27017/admin?authSource=admin
+                              - --quiet
+                              - --eval
+                              - db.adminCommand('ping').ok
+                      initialDelaySeconds: 5
+                      periodSeconds: 5
+                  resources:
+                      requests:
+                          memory: "256Mi"
+                          cpu: "100m"
+                      limits:
+                          memory: "512Mi"
+                          cpu: "500m"
+            volumes:
+                - name: mongodb-storage
+                  persistentVolumeClaim:
+                      claimName: mongodb-pvc
+
+---
+apiVersion: v1
+kind: Service
+metadata:
+    name: mongodb
+    namespace: noteapp
+spec:
+    clusterIP: None
+    ports:
+        - port: 27017
+          targetPort: 27017
+    selector:
+        app: mongodb
+
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+    name: noteapp
+    namespace: noteapp
+spec:
+    replicas: 2
+    selector:
+        matchLabels:
+            app: noteapp
+    template:
+        metadata:
+            labels:
+                app: noteapp
+        spec:
+            containers:
+                - name: noteapp
+                  image: noteapp:latest
+                  imagePullPolicy: IfNotPresent
+                  ports:
+                      - containerPort: 8080
+                        name: http
+                  envFrom:
+                      - configMapRef:
+                            name: app-config
+                  livenessProbe:
+                      httpGet:
+                          path: /health
+                          port: 8080
+                      initialDelaySeconds: 30
+                      periodSeconds: 10
+                  readinessProbe:
+                      httpGet:
+                          path: /health
+                          port: 8080
+                      initialDelaySeconds: 5
+                      periodSeconds: 5
+                  resources:
+                      requests:
+                          memory: "256Mi"
+                          cpu: "100m"
+                      limits:
+                          memory: "512Mi"
+                          cpu: "500m"
+
+---
+apiVersion: v1
+kind: Service
+metadata:
+    name: noteapp
+    namespace: noteapp
+spec:
+    selector:
+        app: noteapp
+    ports:
+        - port: 8080
+          targetPort: 8080
+          protocol: TCP
+    type: ClusterIP
+
+---
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+    name: noteapp-ingress
+    namespace: noteapp
+    annotations:
+        nginx.ingress.kubernetes.io/ssl-redirect: "false"
+spec:
+    ingressClassName: nginx
+    rules:
+        - host: noteapp.local
+          http:
+              paths:
+                  - path: /api
+                    pathType: Prefix
+                    backend:
+                        service:
+                            name: noteapp
+                            port:
+                                number: 8080
+                  - path: /
+                    pathType: Prefix
+                    backend:
+                        service:
+                            name: noteapp
+                            port:
+                                number: 8080
+
+---
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+    name: noteapp-hpa
+    namespace: noteapp
+spec:
+    scaleTargetRef:
+        apiVersion: apps/v1
+        kind: Deployment
+        name: noteapp
+    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