Ales Nosek - The Software Practitioner

Practicing to make software perfect.

RHCSA/RHCE Exam Experience

Today was the great day when I passed the RHCE certification exam. If you’re thinking about getting a Linux certification or you’re already working towards RHCSA/RHCE, this blog post is for you.

First Impressions about ansible-container

At Red Hat summit I learned about the new project ansible-container. I was very excited and looked forward to building Docker containers with Ansible instead of the Dockerfiles. The project seemed to came just on time as in our company we’re starting to Dockerize our software products. How did ansible-container work out for us? Read on!

What I learned from The Open Organization

Red Hat is one of the most successful software companies that makes billions of dollars selling open source software. The book The Open Organization written by Jim Whitehurst, CEO of Red Hat, provides a great insight into the company culture and how things get done at Red Hat. This blogpost lists some of the ideas I learned from this book.

Deploying Kubernetes on OpenStack using Heat

Want to install Kubernetes on top of OpenStack? There are many ways how to install a Kubernetes cluster. The upcoming Kubernetes 1.3 release comes with yet another method called OpenStack Heat. In this article, we’re going to explore this deployment method when creating a minimum Kubernetes cluster on top of OpenStack.

Test-Driving OpenStack Manila

Do you need to provision an NFS share for your Hadoop cluster? And what about creating a CIFS share to make your files accesible to the Windows clients? Manila is a provisioning and management service for shared file systems within OpenStack. Let’s test-drive it in this blogpost.

TripleO Installer - the Good, the Bad and the Ugly

TripleO is an OpenStack deployment and management tool I’ve been using since the Kilo release of OpenStack. It does its job pretty well, however not everything is perfect. My experience presented in this article applies more or less to the Red Hat’s OpenStack director too, as the Red Hat OpenStack director is a downstream version of TripleO.

Bootstrapping a Galera Cluster on RHEL7

The MariaDB Galera packages provided by the RDO project in their OpenStack repositories don’t seem to include a command or script to bootstrap the cluster. Let’s look at an alternative way to bring the cluster up.

Monitoring OpenStack Cluster with Icinga

If you don’t monitor it, it’s not in production! To get an OpenStack cloud ready for production, monitoring is a must. Let’s take a look at two projects providing Nagios/Icinga plugins for checking the health of OpenStack services.