DevOps

Kubernetes Networking by Using Cilium – Intermediate Level – Traditional Linux Routing

Discover a DevOps technology that is about Kubernetes Networking by using Cilium.

Kubernetes Networking by Using Cilium – Intermediate Level – Network Interfaces

If you are new or uneasy with networking in Kubernetes, you may benefit from my previous blog for beginner level. In this blog post I will show you in a Kubernetes cluster what a building and(…)

Kubernetes Networking by Using Cilium – Beginner Level

There seems to be a strong interest these days about understanding better networking in Kubernetes. This blog post is my contribution on this topic. I’ll do my best to explain it in a visual way and translate the techie part(…)

Cloud Native Storage: Overview

When thinking of containers, Cloud Native Storage topic shines like an evidence. You have to handle this topic with care as it will carry your workload and configuration. This blog will be the first of a series talking about CNS(…)

Configure Zabbix with Ansible

Besides the ability to setup your Zabbix server, proxy and agents, the Ansible collection for Zabbix (ie. community.zabbix) also allows to configure every aspects of your Zabbix system. From hosts to users,(…)

Reestablish administrator role access to Rancher users

Introduction I came across a situation where there were no more Administrator users in Rancher. Therefore there was no access to the local (Rancher) cluster and administration of Rancher through the UI. No user could configure and reassign the Administrator(…)

VMware Tanzu Kubernetes: Configure your managed cluster

This third blog describe the steps to do once your cluster is initialized and in ready state. In case you missed the first 2 blogs you can find them here and(…)

Introduction to PostgreSQL in OpenShift

I’m on a mission to tackle scary topics around DevOps these days! In my 2 previous blog posts (Part 1 and Part 2) I’ve tried to demystified the DevOps word (and world!)(…)

Are You Afraid of the Word DevOps? – Part 2

In my previous blog post, we started to explore how to increase the Time-to-Market (TTM) of your simple application. We improved it and to go further we will now leverage containerization. As in part 1, I(…)

How to delete a resource with the error: failed calling webhook

The original mistake In preparation of the GitLab essentials workshop, I’m using helm to deploy it. After a few tests, I wanted to clean up my cluster, and accidentally deleted the namespace before doing helm uninstall.