In this blog post, we will start our first persistent kubernetes application. In our role as an administrator, we first will create a persistent volume. Then, in our role as a developer, we will create a persistent volume claim. Later,…
How to create a Kubernetes Cluster with Kubeadm – Kubernetes Series (3)
In the blog post, we will learn how to create a kubernetes cluster with the help of kubeadm. We will deploy a Kubernetes master on a CentOS system before we will join a second CentOS system as Kubernetes Node. After describing…
MYSQL Backup & Restore on OpenShift
Two weeks ago, I have created a WordPress installation on an OpenShift test system. It is very convenient that OpenShift has provided me with persistent volumes for WordPress and database. However, those volumes are not easily accessible on the OpenShift…
Hello World Kubernetes Service on Minikube – Kubernetes Series (2)
This is part 2 of a series on Kubernetes a la minikube. Minikube is (probably) the easiest way of installing a small Kubernetes system including a graphical user interface. In part 1 we have shown how to install such a system on…
WordPress Password Reset through Database Update or WP CLI
In this post, I have summarized how I have performed a password recovery of a WordPress installation. I have followed the instructions here. I have performed a WordPress password reset via database (Step 1 through 6) as well as a WordPress password…
Installing Minikube on CentOS – Kubernetes Series (1)
In this blog post tutorial, we will learn, how to install a single node Kubernetes cluster via minikube. We will install minikube on CentOS 7 natively without the need for any virtual machine layer. This post is inspired by the…
Installing WordPress via OpenShift
If you happen to have access to a running OpenShift installation, this blog post can help you to install a WordPress in a quick and convenient way. In other cases, you can either check out one of our "HowTo install Openshift" tutorials…
Install WordPress via Docker Compose
In this blog post, we will learn how to install a WordPress solution via Docker Compose. The solution consists of a MySQL container and a WordPress container. We will show, how to install Docker and Docker Compose. before we define the…
How to Install OpenShift on Fedora – a Quick Installation Guide
Are you reviewing Docker orchestration systems like Kubernetes, DC/OS or OpenShift? In this blog post, let us learn how to install a standalone OpenShift Origin system on Fedora. OpenShift Installation on Fedora is a tough nut. As an example, read this…
How to get rid of nested Subscriptions using RxJS flatMap and switchMap
"Nested subscriptions are bad programming style". That is, what many programmers tell us. But: how can we get rid of nested subscriptions? In this little step-by-step tutorial, we will demonstrate how to use flatMap to improve an Angular 6 based REST…
Consuming a REST Service with Angular 4.3+: a Step-by-step Guide
This is an earlier version of a post about consuming a REST service with Angular. A new, fully reworked version for Angular 6+ can be found here. In both versions, I describe how to use angular 4.3+ HttpClientModule. In the…
Angular 6 Docker Example
In this Angular Docker Example, we will take an existing Angular 6 application and run it in a Docker container. We will show, how to create a Docker image in a modern two-stage process. We then will spin up the application…
Angular HttpClient Service Interceptors
Check out three new chapters of our blog post on Consuming a REST Services with Angular First, we will separate the HttpClient Service in its own file we will move some functionality from HTTP Template to the component and we…
Consuming a REST Service with Angular 6: a Step-by-step Guide
REDIRECTED to https://vocon-it.com/2017/06/24/consuming-a-restful-web-service-with-angular/ Angular 6 is available, so it is time to update my original post about how to consume an Angular REST API service in Angular. We will learn how to implement a fully functional rest service in a single…
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…
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" example, we will learn how to add an API key to a project and use the API key to do the following: add an…
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
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Getting Started with Hetzner Cloud Service (IaaS)
A week ago, the press has announced a new Cloud Service: Hetzner Cloud is based in Germany but they offer Infrastructure as a Service (IaaS) in the US as well. You can rent computing resources at "unbeatable prices" as they…