Category Archives: General

OSDC 2016 Talk Recommendations

OSDC – The Open Source Datacenter Conference – just happend a few days back. Here is a short list of videos that I can recommend: A Job and an Adventure – Dawn Foster I met Dawn once at Puppetcamp Düsseldorf, … Continue reading

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Let’s Encrypt automation – The awesome way

Free SSL for the mass \o/ Cryptography is important. I like to encrypt as much traffic and data as possible, not only the important stuff. Let’s Encrypt is a new project sponsored by multiple big companies and the Linux Foundation … Continue reading

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Short Tip: Fiddling around with login shells

I’m currently playing around with LARS, this script collection creates a arch ISO with some post-install magic, for example setting a login shell for root. The used code is: I could boot up the image and ssh into it with … Continue reading

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VirtAPI-Stack Review Part 1 – What happend in the last six months?

I announced the VirtAPI-Stack during the last “30 Posts in 30 Days” Challenge. Let us do a recap, what did we achive in the past 6 months? VirtAPI-Stack description: Let us start with a short description, what was that VirtAPI … Continue reading

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Creating a reliable Arch Linux Package Build Environment

The Arch Linux developers created some fancy scripts to setup a build environment. It consists of a btrfs subvolume with a minimal Arch Linux installation (only packages from base-devel). A snapshot will be created for each build, the builds will … Continue reading

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#vDM30in30 – Summer Edition

Hello everybody! Yes, this Blog is still alive. I was very busy in the past months, but this will change in May. Rob Nelson and I talked about our #vDM30in30 challange las November, and we will do a summer edition … Continue reading

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Short Tip: git magic (copy changed files from branch A to B)

Let us consider the following case: I’ve got a huge project which you want to refactor. You checkout master, create a branch called cleanup and commit every change. Most of the refactoring is only style guide related so no change … Continue reading

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Short Tip: tuning Zabbix Database Part 2

[part 1] Besides disabling autovacuum you can also try to increase the performance if you have got enough free resources. There are three important options for this: autovacuum_vacuum_cost_delay I lowered the sleep between two autovacuums to 0.2ms autovacuum_vacuum_cost_limit/vacuum_cost_limit (setting autovacuum_vacuum_cost_limit … Continue reading

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Short Tip: tuning Zabbix Database

I am currently running a zabbix setup which is a bit bigger than the average ones, right now it receives ~2100 new values per second, generated by 169052 items. The data is stored in a postgresql database, and I am … Continue reading

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Short Tip: Moving commits between branches

Sometimes you are developing on a huge new feature on a software project. If you are smart you do it in a separate (feature-) branch. During the development cycle you may modify existing code and after a few days you … Continue reading

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