Socket.io Ingress controller on Kubernetes (Can't estabilish a connection)

This one is working with one

apiVersion: extensions/v1beta1kind: Ingressmetadata:  annotations:    certmanager.k8s.io/cluster-issuer: core-prod    kubernetes.io/ingress.class: nginx    nginx.ingress.kubernetes.io/proxy-read-timeout: "1800"    nginx.ingress.kubernetes.io/proxy-send-timeout: "1800"    nginx.ingress.kubernetes.io/rewrite-target: /    nginx.ingress.kubernetes.io/secure-backends: "true"    nginx.ingress.kubernetes.io/ssl-redirect: "true"    nginx.ingress.kubernetes.io/websocket-services: ws-service    nginx.org/websocket-services: ws-service  name: core-ingressspec:  rules:  - host: test.io    http:      paths:      - backend:          serviceName: ws-service          servicePort: 80  tls:  - hosts:    - test.io    secretName: core-prod

Nginx itself will upgrade the HTTP request and convert it to WebSocket. You don't have to add any annotation of the same.

Deployment and service, YAML configuration looking good however try removing the annotation server-snippet. This way traffic flow will be something like

LB > ingress (Connection upgrade) > service > pods