CODEWITHSUNDEEP
linuxkuberneteskubernetes-ingressiptablesingress-controller
curiousengineer
curiousengineer

Reputation: 2625

Reaching ingress controller IP from linux machine, hosted on K3s

I have proxmox running on a mini-pc. It has 2 nodes

  1. "node-4" 192.168.1.103
  2. "node-5" 192.168.1.104

Both are running AlmaLinux and hosted on the hypervisor as described above. Both nodes can ping each other using the ip address.

I started a K8 cluster using K3s on node 5. Then I installed helm and added nginx ingress. The IP address was pening initially

[root@node-4 tmp]# kubectl get service --namespace ingress-nginx ingress-nginx-controller --output wide --watch
NAME                       TYPE           CLUSTER-IP     EXTERNAL-IP   PORT(S)                      AGE   SELECTOR
ingress-nginx-controller   LoadBalancer   10.43.152.10   <pending>     80:31138/TCP,443:32638/TCP   24s   app.kubernetes.io/component=controller,app.kubernetes.io/instance=ingress-nginx,app.kubernetes.io/name=ingress-nginx

I edited the service using below(live)

[root@node-4 tmp]# kubectl edit service --namespace ingress-nginx ingress-nginx-controller --
service/ingress-nginx-controller edited

And in the yaml, added the externIP as 192.168.1.200. Can be seen below

[root@node-4 tmp]# kubectl get service --namespace ingress-nginx ingress-nginx-controller --output wide
NAME                       TYPE           CLUSTER-IP     EXTERNAL-IP     PORT(S)                      AGE    SELECTOR
ingress-nginx-controller   LoadBalancer   10.43.152.10   192.168.1.200   80:31138/TCP,443:32638/TCP   3m7s   app.kubernetes.io/component=controller,app.kubernetes.io/instance=ingress-nginx,app.kubernetes.io/name=ingress-nginx

Now when I do a curl from node-5 at the ingress ip, I do get 404 and that is fine as I know the address is reachable from my linux node-5.

I know this might be basic to some but why is it that the ingress ip not reachable from node-4? Basically trying to curl 192.168.1.200 from node-4 and it is not working.

Some additional questions as well, what has been done special to the IP-Tables on node-5 that form node-5 I can access the ingress from outside the K8 cluster, which is the whole point of doing this, and why can this IP not be accessed from node-4?

Upvotes: -1

Views: 23

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