OpenShift cluster tests
05/08/18
We run a lot of automated tests on our OpenShift clusters, but they fail to account for a number of important test cases. This post proposes low-effort and low-cost ways of bridging the gap. Read more
Posts about Infrastructure
How development for AWS changes the local setup
02/02/18
When a new project is set up in the cloud these days, this usually means that AWS is used, that the backend is split into multiple services (e.g. microservices). Read more
Taming the Hybrid Swarm: Initializing a Mixed OS Docker Swarm Cluster Running Windows & Linux Native Containers with Vagrant & Ansible
09/29/17
We successfully scaled our Windows Docker containers running on one Docker host. But what if we change our focus and see our distributed application as a whole? Read more
Debug Ansible Playbooks Like A Pro
Ansible 2.1 introduced two features that make it possible to add proper debug logging to your playbooks, and also check and troubleshoot them on the fly, while they are executed. Read more
Scaling Spring Boot Apps on Docker Windows Containers with Ansible: A Complete Guide incl Spring Cloud Netflix and Docker Compose
05/30/17
Provision a Docker Windows Container with Ansible? No Problem! But wasn´t Docker meant for more than one Container?! Don´t we... Read more
XFS: Possible Memory Allocation Deadlock in kmem_alloc
We were hit by sudden I/O hangs on random virtual machines. Any attempt to write to a its data volume would block forever. This post describes the analysis, cause, and remedy of the problem. Read more
Running Spring Boot Apps on Docker Windows Containers with Ansible: A Complete Guide incl Packer, Vagrant & Powershell
04/06/17
This is a crazy world. It´s not only possible to make Ansible provision Windows machines. No! There are Docker Windows... Read more
Running Spring Boot Apps on Windows with Ansible
01/02/17
There are times you have to use a Windows box to run your Spring Boot app on. For whatever reason - using the same Continuous Integration (CI) tools like we are used to should be non-negotiable! Read more
Highly available VIPs on OpenStack VMs with VRRP
Creating VRRP connected VMs on an OpenStack cloud is a non-trivial task. In this blog post I will walk you through this task. Read more