Exposing RabbitMQ AMQP port using ingress nginx

Question

After research for a few days, I assume this is the most valuable answer for now, and I was tried to find my way out from that idea, just forward tcp protocol from the port to the corresponding service. But I have no luck so far.

Any suggestions are appreciated.

Environment:

• Ubuntu 22.04
• K3s
• Nginx installed, using helm, namespace ingress-nginx
• RabbitMQ installed using bitnami chart, namespace rabbitmq

First weird behavior

After using port-forwarding to check whether we're able to connect to 5672

# Allow 5672/tcp port accessible from everywhere
ufw allow 5672/tcp

# port forwarding
kubectl port-forward rabbitmq-0 5672:5672

# Checking connection success from local
telnet localhost 5672

# Checking connection failed from any other machine
telnet <my-vps-ip> 5672

I'm sure there's no other firewall, as I only use ufw command to expose other ports, they all work fine.

Any idea ?

Forward TCP request via nginx ingress

--tcp-services-configmap flag within ingress-nginx-controller deployments being added

Config map with port 5672 added.

Checking port 5672 was also patched within ingress-nginx-controller deployment, using command kubectl get deploy ingress-nginx-controller -n ingress-nginx -o yaml

Checking port 5672 was also patched within ingress-nginx-controller service, using command kubectl get svc ingress-nginx-controller -n ingress-nginx -o yaml

But now, even testing locally failed by command telnet localhost 5672, which previously success using port forward.

Is that I missed something ?

Answer 1

I end up using a load balancer service for it. Here's how it does

apiVersion: v1
kind: Service
metadata:
  name: amqp-expose
  namespace: rabbitmq
spec:
  ports:
    - name: amqp
      protocol: TCP
      port: 5672
      targetPort: 5672
  selector:
    app.kubernetes.io/name: rabbitmq
    app.kubernetes.io/instance: rabbitmq
  type: LoadBalancer
  sessionAffinity: None
  externalTrafficPolicy: Cluster