Access Minikube Using Kubectl From Remote Machine

What Is Minikube?

Minikube is a tool that makes it easy to run Kubernetes locally. It runs a single-node Kubernetes cluster inside a Virtual Machine (VM) on your laptop for users looking to try out Kubernetes or develop with it day-to-day. 

Installing Minikube

If you do not have a minikube setup just use the below link to setup. 

https://kubernetes.io/docs/setup/learning-environment/minikube/

Install Kubectl

 It will help you connect to the minikube API server and schedule deployments. 

curl -LO "https://storage.googleapis.com/kubernetes-release/release/

$(curl -s https://storage.googleapis.com/kubernetes-release/release/

stable.txt)/bin/linux/amd64/kubectl"


Apply Port Forwarding in Network Settings

Once the setup is done open the network setting of minikube in VirtualBox and adds port forwarding to 8443. Port 51928 is mapped to 8443 of minikube in network settings below. 

Start Minikube 

The next step is to start a minikube. Take a note of the IP address of your machine, for me, it was 192.168.0.101.

minikube start — apiserver-ips=192.168.0.101

Copy the Certificates and Key Files To Remote Machine

Copy ca.crt, client.crt and client.key to the remote machine and it has kubectl client, they are marked as yellow below. Please note both machines should be on the same network. 

Run Base64 Encode

On remote machine Base64 encode the 3 files ca.crt, client.crt and client.crt and create a config file(location of config file is $HOME/.kube/config) with following content. 

apiVersion: v1

clusters:

- cluster:

certificate-authority-data: LS0tLS1CRUdJTiBDRVJUSUZJQ0FURS0tLS0tCk1JSUM1ekNDQWMrZ0F3SUJBZ0lCQVRBTkJna3Foa2lHOXcwQkFRc0ZBREFWTVJNd0VRWURWUVFERS0tLS0tCg==

server: https://192.168.0.101:51928

name: minikube

contexts:

- context:

cluster: minikube

user: minikube

name: minikube

current-context: minikube

kind: Config

preferences: {}

users:

- name: minikube

user:

client-certificate-data: LS0tLS1CRUdJTiBDRVJUSUZJQ0FURS0tLS0tCk1JSURBRENDQWVpZ0F3SUJBZ0lCQWpBTkJna3Foa2lHOXcwQkFRc0ZBREFWTVJNd0VRWURWUVFEBVEUtLS0tLQo=

 client-key-data: LS0tLS1CRUdJTiBSU0EgUFJJVkFURSBLRVktLS0tLQpNSUlFcEFJQkFBS0NBUUVBcDM2eVJMNmt6cXVvQVBQWkxQNmlXNlZ1WHBteVZUeTBsR3pmUX0tLQo=

Replace Content of Following Keys With base64 Encoded Content in Kube Config File Above

certificate-authority-data: with base64 encoded ca.crt

client-certificate-data: with base64 encoded client.crt

client-key-data: with base64 encoded client.key

Access the Cluster  

You can now run the kubectl command to access this minikube cluster.

Credits for help in starting minikube: 

https://github.com/kubernetes/minikube/issues/1974#issuecomment-360197415