You will find here step by step instructions on how to install an ingress controller on a Kubernetes multi-node cluster with an example application on both, HTTP and HTTPS. In our last blog post, we have installed a Kubernetes Ingress…
Kubernetes (5) Local Persistent Volumes – A Step-by-Step Tutorial
Kubernetes local volumes go beta. However, what is it, a Kubernetes local volume? Last time, we have discovered, how to use Kubernetes hostPath volumes. However, we also have seen, that hostPath volumes work well only on single node clusters. Here,…
Mesos and Marathon REST API via cURL — A Hello World Example
In this hello-world style blog post, we will learn how to create load balanced Docker services in an open source DC/OS & Mesos environment. For that, we will perform Mesos and Marathon REST API calls using simple cURL commands. First, we will…
Getting Started with DC/OS on AWS
In the step-by-step tutorial Getting Started with DC/OS on Vagrant, we have learned how to install a MesosPhere DC/OS data center operating system locally. This time, we will install a DC/OS system on AWS Cloud: existing AWS CloudFormation templates will help us create…
Behavior-Driven Angular – Part 2: Inserting REST Data as „innerHTML“ into a Web Application
Today, we will extend the behavior-driven development example of the previous blog post and add the blog content to the document. Like last time, we will retrieve the HTML content from the WordPress API. Sounds easy, right? We will see that…
Behavior-Driven Angular – part 1: Consuming a RESTful Web Service with Angular 4
In this step-by-step tutorial, we will follow a behavior-driven development approach to create an Angular 4 application from Angular CLI. The hello-world-like application will consume the WordPress REST API and it will display a blog post title. We will create…
Angular 4: Automatic Table of Contents
In this step by step tutorial, we will go through the process of creating a two-level automatic Table of Contents by adding Angular Typescript/javascript code. We will perform following steps: We will discuss alternative solutions. We will start an Angular…
Getting Started with DC/OS on Vagrant
In the course of this Hello World style tutorial, we will explore DC/OS, a Data Center Operating System developed and open sourced by Mesosphere with the target to hide the complexity of data centers. We will install DC/OS on your local PC or Notebook…
Jenkins (6): BrowserStack Integration – Automated Cross Browser Testing
With the BrowserStack cloud-based solution, there is no need to buy many different hardware types for testing your website for many different mobile devices and operating systems. In this blog post about Jenkins BrowserStack Integration, we will learn how to integrate BrowserStack-based automated…
Jenkins Part 4.2: Code Quality Tests via Checkstyle
Today, we will show how to use Checkstyle for improving the style of Java code. First, we will add Checkstyle to Gradle in order to create XML reports for a single build. Jenkins allows us to visualize the results of more…
Jenkins Part 4.1: Functional Java Tests via JUnit
You also think that functional tests are one of the most important ingredients for delivering high quality software? You share my opinion that we should help the developer automating this task in order to get comparable results and to receive meaningful trend reports? I…
Jenkins Part 3.1: periodic vs triggered Builds
Today, we will make sure that Jenkins will detect a code change in the software repository without manual intervention. We will show two methods to do so: Periodic Builds via Schedulers: Jenkins periodically asks the software repository for any code changes…
Getting Started with Mesos Resource Reservation & Marathon Watchdog – A „Hello World“ Example
Today, we will introduce Apache Mesos, an open source distributed computing system with the target to allow applications to run on a computer cluster as if it was running on a single computer. On top of a Mesos cluster, we…
Jenkins Part 2: automated Code Download and Build (Gradle + Maven)
NEW (2017-01-02): you now can immediately start with part 2 (this post) without going through the steps of part 1. A corresponding pre-installed Docker image is provided. NEW (2017-01-05): I have added the Maven build path with a fat executable…
Cassandra „Hello World“ Example
Today, we will introduce Cassandra, a distributed and resilient, highly scalable noSQL database. For simplicity, we will run a cluster within Docker containers. We will test the resiliency functions by killing one of two containers and verifying that all data…
Jenkins Part 1: Installation the Docker Way
In this blog post, we will deploy and get started with Jenkins, the most popular open source tool for Continuous Integration and Continuous Deployment. As a modern way of installing, we install a Docker host and deploy a Jenkins Docker…
How to set up Docker Monitoring via cAdvisor, InfluxDB and Grafana
Have you ever tried to monitor a docker solution? In this blog post, we will discuss three open source docker monitoring alternatives, before we will go through a step by step guide of a docker monitoring alternative that consist of the components Google cAdvisor as…
Docker HTTP Proxy and DNS Configuration Cheat Sheet (now includes automatic HTTP Proxy detection)
This blog post provides a little cheat sheet on running a Linux host with or without a Docker client behind HTTP proxies. For Ubuntu and similar Linux distributions, we will also show how to detect the proxy available and adapt…
LXD vs Docker — or: getting started with LXD Containers
Container technology has existed long before the Docker hype around container technology has started after 2013. Now, with Docker containers having reached mainstream usage, you can easily get confused about available container types like Docker, LXC, LXD and CoreOS rocket. In this…
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…
