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 »
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, 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 »
These are instructions on how to update a K3S cluster running in Multipass virtual machines. My installation of such a cluster is described in a previous article.The procedure will update K3S, both master and agent nodes, to the latest version of K3S. Master Node When updating the master node I take the opportunity to obtain… Read More »
This is another Kubernetes-related notebook entry in which I will document the procedure for setting up a Kubernetes cluster using K3S in virtual machines created with Canonical’s Multipass. In addition, I will describe how to configure kubectl, the Kubernetes command-line cluster management tool to manage the K3S cluster from outside of the virtual machines in… Read More »
Kubernetes and the echo-system around it has developed a lot during the last few years making Kubernetes much more accessible. In this article, which purpose mostly is to scribble down some notes for myself, I am going to describe how to run Kubernetes in Docker containers using Kind (Kubernetes in Docker) on Ubuntu and Mac… Read More »
In this my third GitLab-related article I will show how I set up a CI/CD pipeline in GitLab CE for Maven-based applications that can produce, scan Docker images for release versions of the application. When I set out to create this pipeline, little did I know that I would also need to define a Git… Read More »
In this article I will show how I added a GitLab runner with a Docker executor to my original GitLab CE setup. This type of GitLab runner will allow me to run GitLab jobs in containers created from Docker images. Almost a year ago I wrote an article about running GitLab CE in a Docker… Read More »
I have wanted to set up a Git repository of my own for some time now. Not just for the sake of source code version control, but also for other purposes that I plan to write about on this blog in the future. In this article I will show how to set up a local… Read More »
A few short words on the update of my Mule ESB Community Edition Docker images, to which I have included an image for the version 4 release candidate. Since there were problems running the version 4 release candidate on Alpine Linux due to the JavaScript scripting engine not being included or not working properly, I… Read More »