Port Number used by the ingress controller

#1

Hi -
I have a similar question from Lightening Labs - In the question below, it mentions " Here 30093 is the port used by the Ingress Controller"

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Also in the solution - we do not specify this port number anywhere in the manifest file.
Please help in understanding this scenario…

#2

The port is specified not by the ingress resource, but in the configuration of the Ingress Controller in the ingress-nginx namespace. The IC uses a service to expose ports for all of the ingress resources it manages on the cluster. Typically this will be a LoadBalancer service, but in our labs, we use a NodePort service instead. That’s where the 30093 port is referenced.

1 Like
#3

Hi Rob
When I do a get ingress -owide I see a port number used by the ingress resource -port #80
What is this port used for. As we discussed the controller is on port 30093.

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Thanks in advance

#4

I’m not sure what’s displayed in the k get ing -o wide output, but I’d guess it relates to the underlying service that the IC uses:

controlplane ~ ➜  k -n ingress-nginx get svc
NAME                                 TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)                      AGE
ingress-nginx-controller             NodePort    10.105.167.20   <none>        80:30093/TCP,443:31883/TCP   6m24s

The place to confirm this would be look in the kubernetes sources and actually see where “get” is implemented for the ingress resource type.