Techrunnr Blog

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minikube-addons

Minikube is a kind of tool which lets you run the Kubernetes cluster on your local machine. This helps you to develop and test on Kubernetes. Follow this link to how to set up...

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kubescape – Kubernetes Security tool

Recently CISA and NSA have released guidance on security measures that need to be followed using Kubernetes. As per NSA and CISA hackers are targeting Kubernetes for 3 things, Data Theft Computational theft Denial...

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How to renew kubernetes certificates

During the setup of the Kubernetes cluster, you might have seen a folder called /etc/kubernetes/pki is created. If you go inside that folder you can see many certificates and Keys have been created. These...

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upgrade from acme v1 to v2

Recently there was a change from letsencrypt that ACME client v1 is deprecated and updated the users whoever using the v1 to upgrade to v2 version. They have sent emails to the users who...

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how to remove corrupted disk from LVM?

There are certain cases either physical /logical disk gets failed due to some reasons. Recently in my case, I was using 3 disks to create a logical volume in my Linux server for storing...

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How to upgrade Kubernetes cluster

In this tutorial, we are upgrading the Kubernetes cluster from 1.17.x to 1.18.20. Below are the steps which  need to be taken care during the upgrade Its always recommended to perform a backup of...

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Enable elasticsearch slow log

As a DevOps engineer, you might see some users complaining about the elastic search that searching the logs is very slow. And in some scenarios, this situation is cannot be reproducible. So it will...