Socket.IO kubernetes - sockets

Question

I'm creating a web application, where I'm using Kubernetes, in my backend application I have a server that listens to socket connections on port 3000, I deployed my application (front and back) and it works fine I can get data by HTTP requests ... now I want to establish a socket connection with my backend application, but I don't know which address and which port I have to use in my frontend application (or which configuration to do), I searched with my few keywords but I can't find a tutorial or documentation for this if anyone has an idea I would be thankful

Answer 1

Each deployment (frontend and backend) should have its own service.
Ingress (web) traffic would be routed to the frontend service:
apiVersion: v1
kind: Service
metadata:
name: frontend-svc
spec:
selector:
app: frontend
ports:
- protocol: TCP
port: 8080
targetPort: 8080
In this example, your frontend application would talk to host: backend-svc on port 6379 for a backend connection.
apiVersion: v1
kind: Service
metadata:
name: backend-svc
spec:
selector:
app: backend
ports:
- protocol: TCP
port: 6379
targetPort: 6379
Example API implementation:
io.adapter(socketRedis({ host: 'backend-svc', port: '6379' }));