Blog on maybebuggy

How to start Jenkins in maintenance mode

Thu, 19 Nov 2020 00:00:00 +0000

From time to time we need to upgrade our Jenkins installation. Usually this requires two restarts due to the fact that first Jenkins core needs to be updated and later on the huge amount of plugins. Of course you can update the plugins first and then core, but more often than not some plugins need a newer core version and therefore you don’t get the latest updates without upgrading core first.

CLI wizardry - counting file sizes with find and du

Mon, 29 May 2017 00:00:00 +0000

From time to time one needs to count the size of all files matching a certain pattern.

MS SQL on Linux

Sun, 05 Feb 2017 00:00:00 +0000

This is just a quick post (merely to have something for myself to remember) on how to get MS SQL running on Linux.
As you might have noticed, there is a developer version of the next MS SQL server available (for now called “vNext Community Preview”) which is also available on Linux and even as a Docker container.

Fun with Ceph cache tiers

Sun, 02 Oct 2016 00:00:00 +0000

As announced in the previous post, I rebooted the blog in order to write about our experiences with OpenStack and Ceph. For the first topic I picked the Ceph cache tiering, as we have recently struggled quite a bit to keep it up and running ;)

We have a lot of short living VMs which are used for automated tests. Those tests are quite IO heavy so we decided to put an NVMe flash based cache tier in front of our regular Ceph pool used for VMs. I’ll post a more detailed overview about our Ceph and OpenStack deployment (and how we arrived there) in future posts, so for now we’ll directly dive into the oddities of Ceph caches.

Restart of the blog

Thu, 29 Sep 2016 00:00:00 +0000

It’s been a long time, but I figured it’s time to restart the blog. In the past two years we started setting up an OpenStack based IaaS for our developers to be able to test our software in a distributed fashion. As storage we’ve chosen Ceph which is quite powerful but also comes with a few unexecpted quirks. So expect quite some OpenStack and Ceph posts in the future.

Shutdown Jenkins safely

Sun, 07 Apr 2013 00:00:00 +0000

A few weeks ago I had to prepare our Jenkins for an internal cloud update. The update would take place over the weekend, so it had to be down on Saturday, 8 a.m. I didn’t want to wait until everyone was finished on Friday evening, so I had a look for an automatic shutdown procedure.

Hello World

Sat, 17 Nov 2012 00:00:00 +0000

Hello everybody,

I thought a good article to start with would be the developers evergreen, Hello World ;) This one is from Java, as you might already have recognized.