Is there an equivalent of host.docker.internal for Kubernetes cluster running as part of Windows Docker Desktop

Question

Usecase: I have a Docker desktop and kubernetes enabled within it. From the kubernetes node, I want to connect to a database running on my laptop without using my laptop's ip address.

I want to refer to the Windows Host machine from within Kuberntes Endpoint without using the dynamic IP of the host. In docker there is a special DNS name host.docker.internal that allows host machine endpoints to be connected. I am not able to specify this for the endpoint IP. Is there something equivalent in Kubernetes?

Answer 1

You can achieve this using telepresence, https://www.telepresence.io/

Answer 2

Use host.docker.internal.

I've tested on Mac, but it should work the same for Windows.

1. Spin up an alpine pod (deployment yaml borrowed from rossbackp).

   apiVersion: v1
   kind: Pod
   metadata:
     name: alpine
     namespace: default
   spec:
     containers:
     - image: alpine:3.2
       command:
         - /bin/sh
         - "-c"
         - "sleep 60m"
       imagePullPolicy: IfNotPresent
       name: alpine
     restartPolicy: Always
   

   kubectl apply -f deployment.yaml  # after saving the above file as deployment.yaml
   

2. Start a simple web server, on the host.

   mkdir /tmp/server
   cd /tmp/server
   echo "hi" > index.html
   python -m SimpleHTTPServer 8000
   

3. Access the web server from the alpine pod.

   kubectl exec -it alpine -- sh
   wget -O- host.docker.internal:8000