0 comments on “Getting started with OpenShift Container Platform”

Getting started with OpenShift Container Platform

In this blog post we will review the architecture of OpenShift before we will gain some hands-on experience with OpenShift Origin, which is the free version of the OpenShift Container Platform a.k.a. OpenShift Enterprise. Vagrant software will help us to automate the installation…

0 comments on “Ansible Tower – a Hello World Example”

Ansible Tower – a Hello World Example

This entry is part [part not set] of 3 in the series The Ansible & Salt Series

This is part IV of a little "Hello World" example for Ansible, an IT automation (DevOps) tool. This time, we will get acquainted with Ansible Tower, a web front end for Ansible. The post has following content: Quickest way of "installing" an Ansible Tower…

0 comments on “Ansible Templating – A Hello World”

Ansible Templating – A Hello World

This entry is part [part not set] of 1 in the series Ansible

This post is a continuation of my previous  post, where we have gone through a little "Hello World" example using Ansible, an IT automation tool. Last time we had performed SSH remote shell commands. This time, we will go though a little…

0 comments on “Ansible Hello World – Ansible vs. Salt vs. Chef vs. Puppet”

Ansible Hello World – Ansible vs. Salt vs. Chef vs. Puppet

This entry is part [part not set] of 3 in the series The Ansible & Salt Series

This is part 1 of a little Ansible Hello World example, an IT automation tool. The post has the following content: Comparison of the popularity of Ansible, Salt, Chef, and Puppet Installation of Ansible based on Docker Simple Example Playbooks (i.e.…

0 comments on “Source Code to Docker Image — automated Build”

Source Code to Docker Image — automated Build

What, if you could release and deploy fully tested and bullet-proof software on a day by day basis? Isn't this a huge effort for hobby developers like me? Even for hobby developers, Docker and its ecosystem promises an easy way to…

0 comments on “Docker Performance Tests for Ruby on Rails”

Docker Performance Tests for Ruby on Rails

In a series of performance tests, we could show that a (Rails) web application has 50% higher performance on docker (installed on Windows/boot2docker) than the same application run natively on Windows, no matter whether or not the database and program code is located on a shared volume. However, if such a shared volume is auto-mounted to one of the Windows C:\Users folders, the performance drops by a factor of almost ten.

0 comments on “Docker CoreOS Cluster Failover Test in less than 15 Minutes”

Docker CoreOS Cluster Failover Test in less than 15 Minutes

In this post, I will explore services failover scenarios for docker containers on CoreOS clusters using fleet. A container-based service will be defined and started, and we will explore the service recovery after a failure of one or all cluster nodes (e.g.…