What is Kubernetes? This is the first post of a mini-series dedicated to running Kubernetes hosted on AWS. For an introduction to Kubernetes and Container Orchestration, you may check out our Beginner Guide. This first post will be about the considerations we have made when proposing a production-ready and Enterprise-grade Kubernetes environment to our clients. I […]

This tutorial explains how to set-up the check_oracle_health script (credits to Gerhard Lausser) to work on your Nagios environment on CentOS (or any RedHat-based Linux). This Nagios plugin allows monitoring many oracle DB parameters – like tablespaces size, session, process count, SGA pool, etc. Check it out on the author’s web set.The hardest part of […]

WHAT IS THE PURPOSE OF A TOOL LIKE SALTSTACK AND A BETTER QUESTION, WHAT PROBLEM DOES IT SOLVE? The two main purposes of SaltStack are configuration management and remote execution. You have probably heard or used one of the more popular alternatives of SaltStack – Ansible, Puppet, or Chef. All of them pretty much accomplish the same goal. I like Salt […]

Since you are here, you have probably heard of Docker. When you search it in Google the first result is: “Docker – Build, Ship, and Run Any App, Anywhere” – don’t believe me, try it yourself. That sounds great but in the means of Privacy and protecting your intellectual property, it doesn’t. This is because […]

Icinga2 is a great tool built upon the foundation of the well-known Nagios monitoring, inheritingall the pros it has to offer. With many plugins available in your repository and thousands more in the community-driven Nagios-exchange website, icinga2 is a very good choice for your infrastructure monitoring.I will cover some of the optional features that can be tweaked to suit your […]

In addition to the article about the PeerVPN installation and configuration, I will now show you a more advanced and quite ‘modern’ way to provision several servers and get your VPN client up really fast. You’ve probably heard of Ansible already. Well, one of its use cases is exactly what we need here: Configuration Manager. Many […]

I’m not a big NFS fan ever since I worked as a Linux/Unix administrator way back in the good old days. Sometimes when the NFS server hung, lost network connectivity, or something else happened all clients that had mounts from the NFS completely blocked waiting for it to come back up, because it is so […]