Kubernetes

Deploy your Stoma gateway to Kubernetes.

Deployment

deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: stoma-gateway
  labels:
    app: stoma-gateway
spec:
  replicas: 3
  selector:
    matchLabels:
      app: stoma-gateway
  template:
    metadata:
      labels:
        app: stoma-gateway
    spec:
      containers:
        - name: gateway
          image: stoma-gateway:latest
          ports:
            - containerPort: 3000
          env:
            - name: NODE_ENV
              value: "production"
            - name: UPSTREAM_URL
              valueFrom:
                secretKeyRef:
                  name: gateway-secrets
                  key: upstream-url
          resources:
            requests:
              memory: "128Mi"
              cpu: "100m"
            limits:
              memory: "256Mi"
              cpu: "500m"
          livenessProbe:
            httpGet:
              path: /health
              port: 3000
            initialDelaySeconds: 5
            periodSeconds: 10
          readinessProbe:
            httpGet:
              path: /health
              port: 3000
            initialDelaySeconds: 5
            periodSeconds: 5

Service

service.yaml

apiVersion: v1
kind: Service
metadata:
  name: stoma-gateway
spec:
  selector:
    app: stoma-gateway
  ports:
    - port: 80
      targetPort: 3000
  type: ClusterIP

Ingress

ingress.yaml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: stoma-gateway
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  rules:
    - host: api.example.com
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: stoma-gateway
                port:
                  number: 80

Horizontal Pod Autoscaler

hpa.yaml

apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
  name: stoma-gateway
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: stoma-gateway
  minReplicas: 3
  maxReplicas: 10
  metrics:
    - type: Resource
      resource:
        name: cpu
        target:
          type: Utilization
          averageUtilization: 70

Apply Resources

kubectl apply -f deployment.yaml
kubectl apply -f service.yaml
kubectl apply -f ingress.yaml

Check Status

kubectl get pods -l app=stoma-gateway
kubectl get svc stoma-gateway
kubectl describe ingress stoma-gateway