Category Archives: Devops/Linux

As part of my project to move everything from VMs to kubernetes and to get rid of some really old VMs (talking OpenSuSE 11 from 2010 here), it is now time to migrate my old java applications to kubernetes. These … Continue reading →

Up until now I have been running, a by now ancient, version of Jenkins on a virtual machine. The virtual machine on which it was running was so old that it was even unable to download any more newer artifacts … Continue reading →

The final step in migrating ‘everything-email’ from my old server to a kubernetes setup is the migration of mailing lists based on mailman. In previous posts, I migrated the core mailserver and webmail to kubernetes. It s recommended to read the … Continue reading →

This is a continuation of my earlier post on migrating my mailserver to kubernetes. The next component of my mail setup to migrate is webmail. In the past I used squirrelmail for this, so I started with investigating that. However, … Continue reading →

It has been a long time since I setup a mail server. It started with my first mailserver on linux somewhere in 2000 using sendmail and University of Washington IMAP. This setup was assuming mail delivery to local system users. … Continue reading →

As part of moving everything that is running in VMs on my server to kubernetes, the old wordpress installation had to be migrated to kubernetes as well. The website was previously running in a linux container based on systemd-nspawn, using … Continue reading →

As mentioned in my previous post I would follow up with a tool for testing network policies. This tool is finally here and is available on github. It is written in python an available through install on PyPi.

An often overlooked topic in kubernetes is network security. This is probably caused by the fact that perople just assume it is secure by default because it is new, and because of the Service concept. The standard way to expose … Continue reading →

As part of migrating all the stuff I have from virtual machines to a kubernetes infrastructure, some important pieces of infrastructure are needed. These are: RPM repository: I use custom RPM repositories for setting up virtual machines. These same RPMs … Continue reading →

These days, it is ill-advised to run a website (such as this one), over HTTP, even if there is no security risk at all. When hosting your website on HTTP, users will see a warning triangle in the address bar … Continue reading →