Two years ago already?!? Apparently more than two years have already passed since I wrote an article about installing and testing Traefik v2 in a K3S cluster. Given a recent article in which I were able to completely automatize the creation and set up of a K3S cluster, I thought I would revisit my old… Read More »
Some time ago I sat out to automatize the creation of a K3S (lightweight Kubernetes) cluster in Multipass virtual machines using Ansible since I wanted to be able to quickly create a K3S cluster for wild experiments. Given a number of nodes and configurations for each of the virtual machines on which the nodes are… Read More »
Some time ago I wrote an article on how to test deployment of Docker containers with Ansible using Molecule. In addition I merrily went ahead and used my own advice and initially I weren’t able to discover any flaws. After some time low disk-space warnings began appearing. Using NCDU, I tried to determine what was… Read More »
When developing programs that are larger than minuscule I prefer to structure them in a fashion as once inspired by an article by Simon Brown named “An Architecturally Evident Coding Style” that I read some years ago. Not only does this help me to organize my code in a, to me, familiar way but it… Read More »
Update: There is a slight issue with the technique described in this article. Please refer to this article for a remedy. Testing Ansible automation with Molecule means testing against Docker container(s) that poses as remote server(s). An interesting challenge, at least to me, was to use Molecule to test deployment of Docker containers – this… Read More »
In this article I will have a look at how to establish dependencies between Ansible collections so that if B has a dependency to C and A has a dependency to B then C will be available without when executing A without explicitly including C as a dependency to A. Motivation When developing Ansible collections… Read More »
In this article I will, using a test-case, show how to publish and consume MQTT messages using the reactive HiveMQ client library. I will use the Mosquitto MQTT broker for the test. The example application will be implemented using Spring Boot 3 and Java 17. The example will initially allow unauthenticated access that later will… Read More »
In this article I am going to satisfy my curiosity regarding how variables work in Ansible roles.An Ansible role is a set of reusable resources, such as tasks, handlers and templates that can be used from Ansible playbooks. As a software developer, I would perhaps compare roles to subroutines – neither can be used in… Read More »
In this article I will automate creation of Multipass virtual machines using Ansible. The manual process is described in an earlier article. As in the previous article, the virtual machines created will be configured as to allow for password-less login using a private key. Prerequisites In order to be able to create Multipass virtual machines,… Read More »
In this article I will show how to reduce the set of application configuration properties available to a Spring Boot test. The reason for me wanting to do this is to be able to write tests for code that relies on a dynamic set of configuration properties. The source-code of the completed example project can… Read More »