ingress-nginx: Unable to call one service from another using axios - node.js

Question

I've created 2 services using node-express:
webbff-service: All incoming http requests to the express server to pass through this service
identity-service: To handle user auth and other user details
webbff service will pass on the request to identity service if url matches a respective pattern.
webbff-service: server.js file:
const dotEnv = require('dotenv');
dotEnv.config();
dotEnv.config({ path: `.env.${process.env.NODE_ENV}` });
const express = require('express');
const app = express();
app.use('/webbff/test', (req, res) => {
res.json({ message: 'web bff route working OK!' });
});
const axios = require('axios');
app.use('/webbff/api/identity', (req, res) => {
console.log(req.url);
const url = `http://ingress-nginx-controller.ingress-nginx.svc.cluster.local:8000/api/identity${req.url}`;
axios
.get(url)
.then((response) => {
res.json(response.data);
})
.catch((error) => {
console.log(error);
res.status(500).json({ error });
});
});
// Error handler middleware
const errorMiddleware = require('./error/error-middleware');
app.use(errorMiddleware);
const PORT = process.env.SERVER_PORT || 8000;
const startServer = async () => {
app
.listen(PORT, () => {
console.log(`Server started on port ${PORT}`);
})
.on('error', (err) => {
console.error(err);
process.exit();
});
};
startServer();
Deployment file of webbff-service:
apiVersion: apps/v1
kind: Deployment
metadata:
name: webbff-service-depl
spec:
replicas: 1
selector:
matchLabels:
app: webbff-service
template:
metadata:
labels:
app: webbff-service
spec:
containers:
- name: webbff-service
image: ajhavery/webbff-service
---
apiVersion: v1
kind: Service
metadata:
name: webbff-service-svc
spec:
selector:
app: webbff-service
ports:
- name: webbff-service
protocol: TCP
port: 8000
targetPort: 8000
Identity service is a simple node express app - which accepts all urls of format: /api/identity
It has a test route - /api/identity/test to test the routes
Deployment file of Identity service:
apiVersion: apps/v1
kind: Deployment
metadata:
name: identity-service-depl
spec:
replicas: 1
selector:
matchLabels:
app: identity-service
template:
metadata:
labels:
app: identity-service
spec:
containers:
- name: identity-service
image: ajhavery/identity-service
---
apiVersion: v1
kind: Service
metadata:
name: identity-service-svc
spec:
selector:
app: identity-service
ports:
- name: identity-service
protocol: TCP
port: 8000
targetPort: 8000
Both these services are deployed on meraretail.dev - a local service which I achieved by modifying /etc/hosts:
127.0.0.1 meraretail.dev
Skaffold.yaml file used for deployment on local kubernetes cluster with 1 node:
apiVersion: skaffold/v2beta28
kind: Config
deploy:
kubectl:
manifests:
- ./kubernetes/*
build:
local:
push: false # don't push images to dockerhub
artifacts:
- image: ajhavery/webbff-service
context: webbff-service
docker:
dockerfile: Dockerfile
sync:
manual:
- dest: .
src: 'src/**/*.js'
- image: ajhavery/identity-service
context: identity-service
docker:
dockerfile: Dockerfile
sync:
manual:
- dest: .
src: 'src/**/*.js'
Routing between files is handled using ingress-nginx service:
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: ingress-public-svc
annotations:
kubernetes.io/ingress.class: nginx
nginx.ingress.kubernetes.io/use-regex: 'true'
spec:
rules:
- host: meraretail.dev
http:
paths:
- path: '/webbff/?(.*)'
pathType: Prefix
backend:
service:
name: webbff-service-svc
port:
number: 8000
- path: '/api/identity/?(.*)'
pathType: Prefix
backend:
service:
name: identity-service-svc
port:
number: 8000
Though, when I try to access the route: https://meraretail.dev/webbff/api/identity/test
In postman, I receive error - BAD gateway