kind cluster: context deadline exceeded

[JCzz]

Describe the bug
I am running k8s kind cluster on macos arm64. When running:
go test -v -tags kubernetes -run TestKubernetesHelloWorldExample
It do apply the pods, but when testing for http://172.18.0.1:5000 it runs into problems, see terminal output below.
Do you use client-go to access http://172.18.0.1:5000 or do I need to create an ingress to access from the host?

Nice to have

• Terminal output
  TestKubernetesHelloWorldExample 2024-04-16T19:26:01+02:00 retry.go:103: HTTP GET to URL http://172.18.0.1:5000 returned an error: Get "http://172.18.0.1:5000": context deadline exceeded (Client.Timeout exceeded while awaiting headers). Sleeping for 3s and will try again.

Versions
Terratest version: v0.46.13
MacOS
go version
go version go1.21.7 darwin/arm64

Same On Windows 11 WSL
go version go1.21.3 linux/amd64

Additional context
Add any other context about the problem here.

[denis256]

Hi,
to access Kubernetes is used go client, it may be that the request reaches the cluster but hangs for some reason(API problem, network policies) - I would say to try to use kubectl cli to check if the cluster is reachable and can create pods.

[JCzz]

Hi @denis256

Thanks, I can create pods and use kubectl for usual stuff. I can also see:
kubectl get pods

NAME                                     READY   STATUS    RESTARTS       AGE
hello-world-deployment-944cbd46d-2jpzz   1/1     Running   0              18h

I can also run my own client-go up against the cluster.

[denis256]

Hm, it may be a problem with accessing exposed services - it is responding when accessing through services?

[JCzz]

That is the problem, I think. The service is running in a kind cluster, using docker on macos. I can see the services, but unable to "curl 172.18.0.1:5000" to the service from host machine:

kubectl get svc
NAME                  TYPE           CLUSTER-IP      EXTERNAL-IP   PORT(S)          AGE
hello-world-service   LoadBalancer   10.96.31.44     172.18.0.1    5000:31173/TCP   25h
kubernetes            ClusterIP      10.96.0.1       <none>        443/TCP          27d

curl 172.18.0.1:5000
curl: (7) Failed to connect to 172.18.0.1 port 5000 after 8 ms: Couldn't connect to server

This is known issue running on non linux environment, but using client-go should be able to to access the services from within the same network, I think?

	// website::tag::4::Check if NGINX service was deployed successfully.
	// This will get the service resource and verify that it exists and was retrieved successfully. This function will
	// fail the test if the there is an error retrieving the service resource from Kubernetes.
	service := k8s.GetService(t, options, "nginx-service")
	require.Equal(t, service.Name, "nginx-service")

[denis256]

On macOS and Windows, docker does not expose the docker network to the host. Because of this limitation, containers (including kind nodes) are only reachable from the host via port-forwards

https://kind.sigs.k8s.io/docs/user/loadbalancer/

[JCzz]

Maybe a suggestion could be to use https://github.com/curl/curl-docker