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 5.1: Using the Job DSL for automatic Creation of Jenkins Jobs
Today, we will learn how to use the Jenkins Job DSL Plugin to create new Jenkins jobs at a push of a button. We will show how we can use Groovy scripts for defining a "Hello World" Jenkins freestyle project and…
Jenkins Part 4.3: Performance Tests via JMeter
Today, we will learn how to automatically create performance trend analysis reports like the following using Jenkins and JMeter: First, we will use Apache JMeter's graphical user interface on the developer's PC to create a test plan, before we integrate JMeter…
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…
Kibana „Hello World“ Example – Part 3 of the ELK Stack Series
Today, we will introduce Kibana, a data visualization open source tool. As part of Elastic's ELK stack (now called Elastic stack), Kibana is often used to visualize logging statistics and for management of the Elastic Stack. However, in this Tutorial, we…
Elasticsearch „Hello World“ Example – Part 2 of the ELK Stack Series
In the last blog post, we have explored Logstash, a tool for collecting and transform log data from many different input sources. Today, we will explore Elasticsearch, a scheme-less noSQL database with a versatile ("elastic") search engine. We will perform…
Logstash „Hello World“ Example – Part 1 of the ELK Stack Series
Today, we will first introduce Logstash, an open source project created by Elastic, before we perform a little Logstash "Hello World": we will show how to read data from command line or from file, transform the data and send it back to…
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…
Ansible Tower – a Hello World Example
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…
CoreOS Cluster Discovery & Troubleshooting
This blog post explores CoreOS cluster discovery problems and how to troubleshoot them. This blog post is part 8 of my DDDocker (a dummy's docker diary) series. Since this post is one of my more popular blog posts on linkedIn, I have…
