How to exposing TCP services on kubernetes ingress-nginx

Kubernetes nginx resource only routing HTTP and HTTPS by default , ingress-nginx can be configured to receive external TCP/UDP traffic from non HTTP layer eg. redis default port is 6379 and route to internal services using port mappings.

Table of contents

Create tcp services config map

Step (1) Create config map with install ingress name space.

apiVersion: v1
kind: ConfigMap
metadata:
  name: tcp-services
  namespace: ingress-nginx
data:
  6379: "redis-namespace/redis-service:6379"

Step (2) Add port mapping to services load balancer

- name: proxied-tcp-6379
    nodePort: 32739
    port: 6378
    protocol: TCP
    targetPort: 6378

Step (3) Add arguments to ingress deployment.

args:
    - /nginx-ingress-controller
    - --tcp-services-configmap=ingress-nginx/tcp-services

Conclusion

Easy easy. 🙏🏻