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…
Testing the Hetzner Cloud API via cURL — IaaS Automation
In this blog post, we will be testing the Hetzner Cloud API. As a "Hello World", we will learn how to add an API key to a project and use the API key to add an ssh key create, read…
Properly move a Website to a new Domain with minimized SEO Losses
Are you planning to move your website to a new domain? Be prepared to lose a large portion of your traffic. In this blog post, we will talk about how to properly move a website to a new domain and how…
GIT remove large binary Files
In this blog post, I will show how to completely remove large files from a GIT repository and its GIT history. I have found many examples on the net, but it was still a challenge to reduce the size of…
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…
Angular 4 Docker Example – for Angular Universal CLI
In this previous blog post, I have shown how to dockerize an Angular CLI application using NginX. However, the method works without adaptions only for classical (client-side rendered) Angular projects. In the current post, we will show, how an Angular…
Angular Universal CLI – Step-by-Step Example with REST Client
This time we will learn how to create a small Angular Universal CLI project that is using the WordPress REST service to retrieve and display the title and content of a WordPress blog post. Angular Universal CLI combines the Universal…
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…
Angular 4 Docker Example – for Angular CLI projects
In this Hello-World-like tutorial, we will show how to run Angular 4 applications that have been created with Angular CLI in a Docker container. As an introduction, we will start running an existing, already dockerized example from Github. As a second…
Adding Swap to CentOS
I describe how to add swap to CentOS and why using dd instead of fallocate for this. Why? In my case, I wanted to take the opportunity of an AWS promotion, which limits the DRAM to 1 GB. The CentOS…
Resolving the VirtualBox code E_FAIL Problem caused by Hyper-V
Shoot! The Microsoft update this morning has caused trouble with my VirtualBox installation. Again! This is the second or third time I had to search for my blog post that is describing the resolution in an appendix. Since the number…
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 end to end Testing
- Angular e2e Protractor Tests on Systems without GUI applied to static and dynamic Web Pages - In this blog post, we will show how to perform end-to-end (e2e) tests with Angular 4: first, we will apply Protractor end to end…
JHipster: Exploring and Improving the Spring Boot REST API
In our last blog post, we have created a simple blog application using JHipster, which is a Yeoman based code generator for Angular and Spring Boot. This time, we will explore and improve the Spring Boot REST API that is generated…
Hello Java Hipster: Angular 4 and Spring Boot
In this blog post, Java Hipster will help us creating a mini blog application based on Angular 4 and Spring Boot. Angular is a popular framework for creating reactive single page applications, while Spring Boot is a robust java-based backend framework…
Angular 4: Automatic Table of Contents – Part 2: Adding Links
In this short blog post, we will learn how to enrich the table of contents (we had added in the previous blog post) with links to the corresponding headline. The end result will look similar to the following picture and…
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…
Angular 4 Universal: Boosting Performance through Server Side Rendering
This time we will show, how to use server side rendering with Angular 4 (or Angular 2). Like in my previous blog post, we will consume a RESTful Web Service with Angular 4. However, the web page will be displayed…
Vagrant on CentOS 7 – Setting up Test Environments the easy Way
After stumbling upon several guides still describing a Vagrant installation via a RubyGem - which is no longer supported - the following article was created and will provide a quick setup guide on how to setup Vagrant on CentOS 7.…
Consuming a REST Service with Angular 6: a Step-by-step Guide
Angular 6 is available, so I have decided to bring my instructions about Consuming a REST Service with Angular to the next level. In this step-by-step hello-world-style tutorial, you will be lead through following steps: installation of Angular CLI v6 in a CentOS docker container retrieval of HTML code data from the WordPress API display of the retrieved HTML code in a browser