apiVersion: apps/v1
kind: Deployment
metadata:
  name: job-info-backend
  namespace: job-info
  labels:
    app: job-info
    component: backend
    version: v1
spec:
  replicas: 2
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 0
  selector:
    matchLabels:
      app: job-info
      component: backend
  template:
    metadata:
      labels:
        app: job-info
        component: backend
        version: v1
    spec:
      serviceAccountName: job-info-backend
      containers:
      - name: backend
        image: job-info-backend:latest
        imagePullPolicy: Always
        ports:
        - name: http
          containerPort: 3005
          protocol: TCP
        env:
        - name: NODE_ENV
          value: "production"
        - name: PORT
          value: "3005"
        - name: LOG_LEVEL
          value: "info"
        - name: OAUTH_CLIENT_ID
          valueFrom:
            secretKeyRef:
              name: oauth-credentials
              key: client-id
        - name: OAUTH_CLIENT_SECRET
          valueFrom:
            secretKeyRef:
              name: oauth-credentials
              key: client-secret
        - name: OAUTH_REDIRECT_URI
          valueFrom:
            configMapKeyRef:
              name: backend-config
              key: oauth-redirect-uri
        - name: CORS_ORIGIN
          valueFrom:
            configMapKeyRef:
              name: backend-config
              key: cors-origin
        resources:
          requests:
            cpu: 100m
            memory: 128Mi
          limits:
            cpu: 500m
            memory: 512Mi
        livenessProbe:
          httpGet:
            path: /health
            port: http
          initialDelaySeconds: 10
          periodSeconds: 30
          timeoutSeconds: 5
          failureThreshold: 3
        readinessProbe:
          httpGet:
            path: /health
            port: http
          initialDelaySeconds: 5
          periodSeconds: 10
          timeoutSeconds: 3
          failureThreshold: 2
        securityContext:
          runAsNonRoot: true
          runAsUser: 1000
          allowPrivilegeEscalation: false
          readOnlyRootFilesystem: false
          capabilities:
            drop:
            - ALL
      nodeSelector:
        kubernetes.io/os: linux
      affinity:
        podAntiAffinity:
          preferredDuringSchedulingIgnoredDuringExecution:
          - weight: 100
            podAffinityTerm:
              labelSelector:
                matchExpressions:
                - key: app
                  operator: In
                  values:
                  - job-info
              topologyKey: kubernetes.io/hostname

---
apiVersion: v1
kind: Service
metadata:
  name: job-info-backend
  namespace: job-info
  labels:
    app: job-info
    component: backend
spec:
  type: ClusterIP
  ports:
  - name: http
    port: 3005
    targetPort: http
    protocol: TCP
  selector:
    app: job-info
    component: backend

---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: job-info-backend
  namespace: job-info
  labels:
    app: job-info
    component: backend

---
apiVersion: policy/v1
kind: PodDisruptionBudget
metadata:
  name: job-info-backend
  namespace: job-info
spec:
  minAvailable: 1
  selector:
    matchLabels:
      app: job-info
      component: backend

---
apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
  name: job-info-backend
  namespace: job-info
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: job-info-backend
  minReplicas: 2
  maxReplicas: 5
  metrics:
  - type: Resource
    resource:
      name: cpu
      target:
        type: Utilization
        averageUtilization: 70
  - type: Resource
    resource:
      name: memory
      target:
        type: Utilization
        averageUtilization: 80