Lab 3.4 - Lab 9.1 Control plane can't reach worker's pod

fabio.sasso

Hello, I'm trying to follow all the LAB with success but I have 2 issue in Lab 3.4: Deploy A Simple Application and in Lab 9.1: Services.
Basically from the control plane (10.0.1.5) I cannot reach pod network (192.168.0.0/16) in the worker node (10.0.1.4).
The cluster is in ready state and the pods are all running.
This is the output from LAB 3.1:

azureadm@k8scp:~$ kubectl get svc,ep -o wide
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
service/kubernetes ClusterIP 10.96.0.1 443/TCP 19h
service/nginx ClusterIP 10.100.75.41 80/TCP 7h38m app=nginx

NAME ENDPOINTS AGE
endpoints/kubernetes 10.0.1.5:6443 19h
endpoints/nginx 192.168.103.210:80 7h38m
azureadm@k8scp:~$

I cannot curl 192.168.103.210:80 without getting a timeout.
curling from worker node succeed.
Thanks

sirgabriel

I have the same problem

chrispokorni

Hi @fabio.sasso,

Are you by any chance running your cluster on Azure cloud infrastructure?

Regards,
-Chris

chrispokorni

Hi @sirgabriel,

Please provide some descriptive details about your infrastructure and cluster, so we can understand the "problem".

Regards,
-Chris

fabio.sasso

@chrispokorni said:
Hi @fabio.sasso,

Are you by any chance running your cluster on Azure cloud infrastructure?

Regards,
-Chris

Hello Chris,
Exactly I'm on Azure. from NSG side it seems all ok.
Please let me know what I can check.

Thanks a lot!

chrispokorni

Hi @fabio.sasso,

Azure is known to require additional and very specific configuration options for the network plugins to work with Azure's own networking implementation. However, that is not needed by the recommended cloud infrastructure providers - AWS and GCP, nor the local solutions with hypervisors such as VirtualBox, KVM, or VMware.

While we do not support the lab exercises on the Azure infrastructure, there are a few forum posts from learners who attempted to run them on Azure, with lessons learned and networking configuration tips.

Regards,
-Chris

cn20230504

@chrispokorni As it happens, I am running my cluster on AWS but I am finding that as @fabio.sasso reports I cannot get the curl commands of Lab 9.1 step 12 to work from the control plane node of my cluster, but it works from the worker node just fine. The nodes are built using Ubuntu 20.04.