While working with kubernetes somewhere down the line you might have faced this error and there could be many reasons behind the issue error execution phase preflight With my experience in working with kubernetes I found that this issue mostly occurs when you are trying to setup kubernetes cluster on your own and since …

TL;DR: This is going to be long post and the objective of this blog post is to deploy Spring Boot Microservice into the kubernetes cluster. The main objective here is to build everything from scratch and what I mean by that - creating a Spring Boot Application RestMicroservice, Building a Docker image and Finally …

Before we jump into the steps of installation, if you are familiar with Puppet, Chef and Ansible (https://github.com/kubernetes-incubator/kubespray) then kubespray is going to be the best choice to set up a Kubernetes cluster. In this article, we will be going through 12 steps starting from setting up vagrant VMs till …

This tutorial is for the ones who want to try out the Kubernetes installation on CentOS (This blog post has been updated and kubernetes installation instructions can be used for CentOS 7 as well as CentOS 8). In this article, I have simplified the installation into 15 steps for installing Kubernetes on CentOS …

TL;DR The error means your client does not trust the issuer of the server's certificate. Three wordings, one cause: self-signed certificate in certificate chain (a private CA signed it, and the server sent the chain), self-signed certificate (the leaf signed itself), unable to get local issuer certificate (the server …

The root cause for the error is swapping is on master as well as worker node. Fixing the error Step 1 - Disable the swap on both master and worker node (please run the below command on both master and worker node) 1vagrant@master:~$ sudo swapoff -a Step 2 - After disabling the swap, re-run the kubeadm init …

(Note : - This article has been updated for installing kubernetes on ubuntu 20.04) In this article on How to Install kubernetes on Ubuntu 20.04 and18.04 we are going to setup Kubernetes cluster along with kubeadm on Ubuntu 20.04 (The same steps can be used for the Ubuntu 18.04 as well as 16.04) We will start setting up …

Quarkus is no doubt one the most super-fast framework for developing the Cloud Native java application. If you have worked with Spring Boot application than I think you are gonna love Quarkus because of its simplicity, super-fast boot time and extremely low memory usage. For the beginner, I would highly recommend going …

It is quite evident from the exception (java.lang.IllegalStateException: JWTAuthContextInfo has not been initialized) that your are missing following key properties inside your application.properties 1mp.jwt.verify.publickey.location or 1mp.jwt.verify.publickey Resolution Step 1 : Define …