cannot add local k8s as cloud in juju

I have a three node cluster k8s which has been setup via kubeadm, I just heard about juju recently and I’m completely new. what I want is that to register my local k8s into my local juju node but as long as I go for registration I come across the following error.

nasri@juju:~$ add-k8s kubeadm-cluster --storage=openebs-hostpath

here I can see juju is trying to connect to 10.96.39.217 where as it is a ClusterIP thus it is private and inaccessible from my machine, but why? after a period it ends up with the error that cannot access to the k8s.

nasri@juju:~$ juju bootstrap kubeadm-cluster
Creating Juju controller “kubeadm-cluster” on kubeadm-cluster
Fetching Juju Dashboard 0.3.0
Creating k8s resources for controller “controller-kubeadm-cluster”
Starting controller pod
Bootstrap agent now started
Contacting Juju controller at 10.96.39.217 to verify accessibility…
ERROR unable to contact api server after 1 attempts: dial tcp 10.96.39.217:17070: i/o timeout