learn by doing

LEMP stack HA cluster deployment with Ansible

I’ve been playing with Ansible lately and I was thinking of a good practice exercise. The first thing that came to mind was an HA cluster since clustered nodes get almost identical configuration and most probably you want to use a config management system to deploy and don’t touch them with any manual configuration.

HA Openstack deployment using RDO-Manager

In this post I’ll describe the steps needed to deploy an Openstack environment with 3 HA Controllers and 2 Nova compute nodes in a virtual environment.

Graphing car metrics into the cloud with Raspberry Pi, OBD and Graphite

In this post we’ll see how you can grab car sensors data and turn them into some good loking and easy to watch graphs.

Getting started with Docker and the wonders of Open Source

As Docker has been a buzzword lately(last year or so) I though that I should give it a try and really do something with it besides reading articles about how great it is.

OSPF lab provisioning on IOS with Ansible

In this post we’ll see how we can quickly get a basic OSPF lab deployed by using Ansible. Our setup consists of 3 x Cisco IOS routers which are connected according to the diagram below. All the routers should already have SSH set up and an interface connected to the management network that will be used for retrieving the configuration files from the server. On the server side we need a Linux machine that has Ansible installed.