I'm currently working with Kubernetes, specifically using Minikube for development purposes, and I've encountered a challenge that I hope to get some guidance on. My goal is to set up port forwarding for a single port that can handle both TCP and UDP protocols simultaneously.
The challenge
From my initial research and attempts, Kubernetes seems to have limitations or specific requirements when it comes to forwarding a port for multiple protocols (TCP and UDP) at the same time. However, I'm unsure if this limitation is due to my current understanding, Kubernetes' inherent capabilities, or the way Minikube handles service definitions and port forwarding.
What I've tried so far
I've reviewed the Kubernetes documentation and searched for any examples or guidelines that might indicate how to configure services or use Minikube to achieve multi-protocol port forwarding on the same port, but with no clear success.I've experimented with service and deployment configurations to specify both TCP and UDP for a single port, but have not managed to get both protocols working simultaneously.
My questions are:
- Is it indeed possible to configure Kubernetes (with Minikube as thedevelopment environment) to forward a single port that supports bothTCP and UDP protocols? If so, how can this be achieved?
- Are there specific annotations, service types, or configurationparameters that I need to use to enable this functionality?
- If Kubernetes does not support this functionality natively, are thererecommended workarounds or tools that can be integrated into aKubernetes-based development environment to facilitate thisrequirement?
Any help on this would be greatly appreciated!
As requested, here is the deployment i've tried so far.
apiVersion: apps/v1kind: Deploymentmetadata: name: netcat-deploymentspec: replicas: 1 selector: matchLabels: app: netcat template: metadata: labels: app: netcat spec: containers: - name: netcat image: subfuzion/netcat imagePullPolicy: Always args: - "-lk" - "-u" - "12345" ports: - containerPort: 12345---apiVersion: v1kind: Servicemetadata: name: netcat-servicespec: type: LoadBalancer selector: app: netcat ports: - name: tcp-port protocol: TCP port: 12345 targetPort: 12345 - name: udp-port protocol: UDP port: 12345 targetPort: 12345