How to Automate Scripts with Golang and CronJobs using Kubernetes

How to Automate Scripts with Golang and CronJobs using Kubernetes

Learn how to set up and automate your first CronJob script using Golang and Kubernetes’ Minikube. Oftentimes when developing scripts with the intent of running them forever on a server, I struggle with making the system robust. There have been countless times where I would have a script running for days or even weeks, but due to unforeseen bugs, I had to restart or update my server. Well, there is a handy tool called CronJobs, and this may sound intimidating, but trust me if I can do it you can too!

Essentially, a CronJob is a utility that automatically runs some type of task periodically on a recurring basis, we will be combining CronJobs with Kubernetes. Minikube is a tool made by Kubernetes which I like to think of in terms of a “big server” and a “baby server”, this tool is run locally and runs a single cluster. Kubernetes runs clusters which is what I refer to as a big server that deploys pods which can be thought of as a baby server. Our big server will deploy out many baby servers and each baby server will serve one purpose. In our case, the one purpose our baby server will serve is to be a CronJob!

That was a lot of information to digest, take a moment to enjoy a gif of this french bulldog!

Get started

Install Golang

Head over to the  Golang website and download the Golang installer for your system. For installation details for your system check out the  installing Golang docs.

Install Minikube

If you already installed Homebrew then run a brew install command to install Minikube:

 brew install minikube 

If HomeBrew isn’t installed on your Mac you must install Minikube via direct download with this command:

curl -Lo minikube https://storage.googleapis.com/minikube/releases/latest/minikube-darwin-amd64 \
  && chmod +x minikube

Add the Minikube executable to your path using the command:

sudo mv minikube /usr/local/bin

If you are using a Windows machine, run the following commands:

kubernetes golang cronjobs kubernetes’ minikube

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