Application run on Azure AKS Kubernates can not be accessed from App Service

Question

I have configured two different applications ( SEQ and MockServer ) on Azure AKS service. They are both working correctly from internet but can not access them from Azure Web Service. It also can not be accessed from Azure CLI. Below my

apiVersion: apps/v1
kind: Deployment
metadata:
  name: mockserver-deployment
  labels:
    app: mockserver
spec:
  replicas: 1
  selector:
    matchLabels:
      app: mockserver
  template:
    metadata:
      labels:
        app: mockserver
    spec:
      containers:
      - name: mockserver
        image: jamesdbloom/mockserver
        env:
        - name: LOG_LEVEL
          value: "INFO"        
        ports:
        - containerPort: 1080
      imagePullSecrets:
      - name: my-secret
---
kind: Service
apiVersion: v1
metadata:
  name: mockserver-service
spec:
  selector:
    app: mockserver
  loadBalancerIP: 51.136.53.26
  type: LoadBalancer
  loadBalancerSourceRanges:
  # from Poland
  - 62.87.152.154/32 
  - 83.30.150.205/32
  - 80.193.73.114/32
  - 195.191.163.0/24
  # from AppCenter test
  - 195.249.159.0/24
  - 195.0.0.0/8
  # from Marcin K home
  - 95.160.157.0/24
  - 93.105.0.0/16
  ports:
  - port: 1080
    targetPort: 1080
    name: mockserver

Answer 1

The best approach is to use VNET integration for your AppService ( https://docs.microsoft.com/en-us/azure/app-service/web-sites-integrate-with-vnet ) combined with an internal LoadBalancer-type Service ( https://docs.microsoft.com/en-us/azure/aks/internal-lb ). This way the communication between the app service and AKS will flow only via the internal VNET. Note that you can have also an external LB service like the one you already have; you can have multiple services serving traffic to the same set of pods.