Define and deploy the nginx service

gcloud/nginx-service/nginx-service-autoscaler.yaml

+apiVersion: autoscaling/v1
+kind: HorizontalPodAutoscaler
+metadata:
+  name: nginx-deployment-hpa
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: nginx-deployment
+  minReplicas: 1
+  maxReplicas: 3
+  targetCPUUtilizationPercentage: 80

gcloud/nginx-service/nginx-service-deployment.yaml

+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+spec:
+  selector:
+    matchLabels:
+      app: nginx
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: nginx
+    spec:
+      containers:
+        - name: nginx
+          image: nginx:latest
+          volumeMounts:
+            - name: nginx-conf
+              mountPath: /etc/nginx/conf.d
+          ports:
+            - containerPort: 80
+      volumes:
+        - name: nginx-conf
+          configMap:
+            name: nginx-conf
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: nginx-service
+spec:
+  selector:
+    app: nginx
+  ports:
+    - name: http
+      port: 80
+      targetPort: 80
+  type: LoadBalancer

gcloud/nginx-service/nginx.conf

+upstream frontend-service {
+    server frontend-service:80; 
+}
+
+upstream user-service {
+    server user-backend-service:9000;
+}
+
+server {
+    listen 80;
+
+    location / {
+        rewrite ^//(.*) /$1 break;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme; 
+        proxy_pass http://frontend-service/;
+    }
+
+    location /api/user-service/ {
+        rewrite ^/user-service/(.*) /$1 break; # works for both /server1 and /server1/
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme; 
+        proxy_pass http://user-service/;
+    }
+}