Kubernetes LoadBalancer service on AKS via helm is not accessible - azure

Question

I'm working on a project in which I need to deploy a simple NodeJs application using Kubernetes, Helm and Azure Kubernetes Service.
Here's What I have tried:
My Dockerfile:
FROM node:8
WORKDIR /usr/src/app
COPY package*.json ./
RUN npm install
COPY . .
EXPOSE 32000
CMD [ "npm", "start" ]
Here's my mychart/values.yaml:
replicaCount: 1
image:
# registry: docker.io
repository: registry-1.docker.io/arycloud/docker-web-app
tag: 0.3
pullPolicy: IfNotPresent
nameOverride: ""
fullnameOverride: ""
service:
name: http
type: LoadBalancer
port: 32000
internalPort: 32000
ingress:
enabled: false
annotations: {}
# kubernetes.io/ingress.class: nginx
# kubernetes.io/tls-acme: "true"
paths: []
hosts:
- name: mychart.local
path: /
tls: []
resources: {}
nodeSelector: {}
tolerations: []
affinity: {}
And my node server.js:
'use strict';
const express = require('express');
// Constants
const PORT = 32000;
const HOST = '0.0.0.0';
// App
const app = express();
app.get('/', (req, res) => {
res.send('Hello world from container.\n');
});
app.listen(PORT, HOST);
console.log(`Running on http://${HOST}:${PORT}`);
Update: Template files:
From templates/deployment.yaml:
apiVersion: apps/v1
kind: Deployment
metadata:
name: {{ include "mychart.fullname" . }}
labels:
app.kubernetes.io/name: {{ include "mychart.name" . }}
helm.sh/chart: {{ include "mychart.chart" . }}
app.kubernetes.io/instance: {{ .Release.Name }}
app.kubernetes.io/managed-by: {{ .Release.Service }}
spec:
replicas: {{ .Values.replicaCount }}
selector:
matchLabels:
app.kubernetes.io/name: {{ include "mychart.name" . }}
app.kubernetes.io/instance: {{ .Release.Name }}
template:
metadata:
labels:
app.kubernetes.io/name: {{ include "mychart.name" . }}
app.kubernetes.io/instance: {{ .Release.Name }}
spec:
containers:
- name: {{ .Chart.Name }}
image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
imagePullPolicy: {{ .Values.image.pullPolicy }}
ports:
- name: http
containerPort: 32000
protocol: TCP
livenessProbe:
httpGet:
path: /
port: 32000
readinessProbe:
httpGet:
path: /
port: 32000
initialDelaySeconds: 3
periodSeconds: 3
resources:
{{- toYaml .Values.resources | nindent 12 }}
{{- with .Values.nodeSelector }}
nodeSelector:
{{- toYaml . | nindent 8 }}
{{- end }}
{{- with .Values.affinity }}
affinity:
{{- toYaml . | nindent 8 }}
{{- end }}
{{- with .Values.tolerations }}
tolerations:
{{- toYaml . | nindent 8 }}
{{- end }}
From templates/service.yaml:
apiVersion: v1
kind: Service
metadata:
name: {{ include "mychart.fullname" . }}
annotations:
service.beta.kubernetes.io/azure-load-balancer-internal: "true"
labels:
app.kubernetes.io/name: {{ include "mychart.name" . }}
helm.sh/chart: {{ include "mychart.chart" . }}
app.kubernetes.io/instance: {{ .Release.Name }}
app.kubernetes.io/managed-by: {{ .Release.Service }}
spec:
type: {{ .Values.service.type }}
ports:
- port: {{ .Values.service.port }}
targetPort: http
protocol: TCP
name: http
selector:
app.kubernetes.io/name: {{ include "mychart.name" . }}
app.kubernetes.io/instance: {{ .Release.Name }}
Update: a screenshot of external IP:
Here's the output of `kubectl get svc node-release-mychart -oyaml:
apiVersion: v1
kind: Service
metadata:
annotations:
service.beta.kubernetes.io/azure-load-balancer-internal: "true"
creationTimestamp: "2019-01-26T11:28:27Z"
labels:
app.kubernetes.io/instance: node-release
app.kubernetes.io/managed-by: Tiller
app.kubernetes.io/name: mychart
helm.sh/chart: mychart-0.1.0
name: node-release-mychart
namespace: default
resourceVersion: "127367"
selfLink: /api/v1/namespaces/default/services/node-release-mychart
uid: 8031f3b6-215d-11e9-bb89-462a1bcec690
spec:
clusterIP: 10.0.223.27
externalTrafficPolicy: Cluster
ports:
- name: http
nodePort: 32402
port: 32000
protocol: TCP
targetPort: 32000
selector:
app.kubernetes.io/instance: node-release
app.kubernetes.io/name: mychart
sessionAffinity: None
type: LoadBalancer
status:
loadBalancer:
ingress:
- ip: 10.240.0.7
I have created a cluster on AKS then run the get-credentials command from my mac os terminal and it works fine, then I have tagged and pushed my docker image to dockerhub and the docker container is also working fine, after that I have created a helm chart and update the values.yaml accordingly and run the helm install command, it install my application to aks and the service provide an external IP, in the kubernetes dashboard the pods are in running state but when I try to access my application via Etxernal_IP:80 it doesn't load my application.

Answer 1

Your problem comes from the fact you've added the annotation to use internal load balancer (so not exposed publicly, only available inside vnet). To fix that remove this part from the service definition:
annotations:
service.beta.kubernetes.io/azure-load-balancer-internal: "true"