What is makefile and how to use it.

A Makefile is a special file used in Unix and Unix-like operating systems to automate the building and compilation of programs or projects. It contains a set of rules and dependencies that specify how to build a target, typically an executable program or a collection of files.

.SILENT:

all: first second last

# .DEFAULT_GOAL:= last

first:

    echo "hello world"

second:

    echo "hello Gaurav"

last:

    echo "hello world Gaurav"

 

Refer here for more details

Setup Minikube on Windows using WSL

 curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64

sudo install minikube-linux-amd64 /usr/local/bin/minikube

Start a cluster - 

minikube start

Start second cluster -

minikube start -p cluster2

List all minikube cluster running:

minikube profile list

Set second cluster as current profile-

Kubectl:

Set kubectl alias to run kubectl commands for minikube if kubectl is not installed locally:

alias kubectl="minikube kubectl --"

View kubernetes config:

kubectl config view

To access minikube from windows command prompt - 

Update kube config file as per config on WSL running minikube

apiVersion: v1

clusters:

- cluster:

    certificate-authority: \\wsl.localhost\Ubuntu\home\gaugupta\.minikube\ca.crt

    server: https://127.0.0.1:49159

  name: cluster2

- cluster:

    certificate-authority: \\wsl.localhost\Ubuntu\home\gaugupta\.minikube\ca.crt

    server: https://127.0.0.1:49154

  name: minikube

contexts:

- context:

    cluster: cluster2

    user: cluster2

  name: cluster2

- context:

    cluster: minikube

    user: minikube

  name: minikube

current-context: cluster2

kind: Config

preferences: {}

users:

- name: cluster2

  user:

    client-certificate: \\wsl.localhost\Ubuntu\home\gaugupta\.minikube\profiles\cluster2\client.crt

    client-key: \\wsl.localhost\Ubuntu\home\gaugupta\.minikube\profiles\cluster2\client.key

- name: minikube

  user:

    client-certificate: \\wsl.localhost\Ubuntu\home\gaugupta\.minikube\profiles\minikube\client.crt

    client-key: \\wsl.localhost\Ubuntu\home\gaugupta\.minikube\profiles\minikube\client.key

Then

>kubectl config use-context minikube

>kubectl get pods