Getting started with Jenkins Part 3: 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 Triggered Builds via Webhooks: Jenkins is triggered by the software repository to perform the build … More Getting started with Jenkins Part 3: periodic vs triggered Builds

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 will run Mesosphere Marathon, an open source container orchestration platform. Similar to a watchdog, Marathon helps running and maintaining … More Getting Started with Mesos Resource Reservation & Marathon Watchdog – A “Hello World” Example

Getting started with 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 JAR file. In this blog post, we will perform our first automated job within Jenkins, the … More Getting started with Jenkins Part 2: automated Code download and Build (Gradle + Maven)

Cassandra “Hello World” Example


    Today, we will introduce Cassandra, a distributed and resilient, highly scalable noSQL database. For simplicity, we will run a cluster it within Docker containers and test the resiliency functions by killing one of two containers and verifying that all data is retained. What is Cassandra? Apache Cassandra is a fast, distributed noSQL database that … More Cassandra “Hello World” Example

Getting started with Jenkins Part 1: Installation in 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 container on this host. Then we will log in and install commonly used plugins, before … More Getting started with Jenkins Part 1: Installation in the Docker Way

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 will analyze statistical data from Twitter by comparing the popularity of Trump vs. Obama vs. … More Kibana “Hello World” Example – Part 3 of the ELK Stack Series

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 a little Elasticsearch “Hello World” by running Elasticsearch in a Docker container and manipulating database entries. After … More Elasticsearch “Hello World” Example – Part 2 of the ELK Stack Series

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 command line or file. In the appendix you will find a note on Logstash CSV … More Logstash “Hello World” Example – Part 1 of the ELK Stack Series

AWS Automation Part 4: Using Terraform for AWS Automation


This is part 4 of a blog post series, in which we explore how to automate Amazon Web Services (AWS) using the Terraform open source software by HashiCorp. Similar to Cloudify, Terraform is a versatile way to codify any type of infrastructure and to spin up a production-like demo or staging environment on any IaaS cloud like AWS, Azure … More AWS Automation Part 4: Using Terraform for AWS Automation

LXD vs. Docker — or: getting started with LXD Containers


Container technology is not new: it had existed long before the Docker hype around container technology has started after 2013. Now, with Docker containers having reached mainstream usage, there is a high potential of getting confused about available container types like Docker, LXC, LXD and CoreOS rocket. In this blog post we will explain, why LXD is not … More LXD vs. Docker — or: getting started with LXD Containers