mikas blog

We’re coming closer to the Debian/stretch stable release and similar to what we had with #newinwheezy and #newinjessie it’s time for #newinstretch! Hideki Yamane already started the game by blogging about GitHub’s Icon font, fonts-octicons and Arturo Borrero Gonzalez wrote a nice article about nftables in Debian/stretch. One package that isn’t new but its tools […]

Recently we had a WTF moment at a customer of mine which is worth sharing. In an automated deployment procedure we’re installing Debian systems and setting up MySQL HA/Scalability. Installation of the first node works fine, but during installation of the second node something weird is going on. Even though the deployment procedure reported that […]

At DebConf 16 I was working on a systemd backport for Debian/jessie. Results are officially available via the Debian archive now. In Debian jessie we have systemd v215 (which originally dates back to 2014-07-03 upstream-wise, plus changes + fixes from pkg-systemd folks of course). Now via Debian backports you have the option to update systemd […]

DebConf 16 in Capetown/South Africa was fantastic for many reasons. My Capetown/South Africa/Culture/Flight related lessons: Avoid flying on Sundays (especially in/from Austria where plenty of hotlines are closed on Sundays or at least not open when you need them) Actually turn back your seat on the flight when trying to sleep and not forget that […]

Open Source Data Center Conference (OSDC) was a pleasure and great event, Netways clearly knows how to run a conference. This year at OSDC 2016 I gave a talk titled “Continuous Integration in Data Centers – Further 3 Years Later“. The slides from this talk are available online (PDF, 6.2MB). Thanks to Netways folks also […]

Yes, I’m going to DebConf 16! This year DebConf – the Debian Developer Conference – will take place in Cape Town, South Africa. Outbound: 2016-06-26 15:40 VIE -> 17:10 LHR BA0703 2016-06-26 21:30 LHR -> 09:55 CPT BA0059 Inbound: 2016-07-09 19:30 CPT –> 06:15 LHR BA0058 2016-07-10 07:55 LHR –> 11:05 VIE BA0696

Open Source Data Center Conference (OSDC) is a conference on open source software in data centers and huge IT environments and will take place in Berlin/Germany in April 2016. I will give a talk titled “Continuous Integration in Data Centers – Further 3 Years Later” there. I gave a talk titled “Continuous Integration in data […]

At the Debian Conference 2015 I gave a talk about Continuous Delivery of Debian packages. My slides are available online (PDF, 753KB). Thanks to the fantastic video team there’s also a recording of the talk available: WebM (471MB) and on YouTube.

Update on 2015-07-02 22:15 UTC: as Petter Reinholdtsen noted in the comments: Try adding /etc/apt/apt.conf.d/90squid with content like this: Acquire::http::Pipeline-Depth 0; It turn off the feature in apt confusing proxies. ” – this indeed avoids those “Hash Sum mismatch” failures with HAProxy as well. Thanks, Petter! Many of you might know apt’s “Hash Sum mismatch” […]

Continuing the #newinjessie game: Bernhard Miklautz, contributor to jenkins-debian-glue and author of jenkins-package-builder (being in an early stage but under active development to provide support for building RPMs, similar to what jenkins-debian-glue provides for building Debian/Ubuntu packages) pointed out that there are new tools related to RPM packaging available in Debian/jessie: mock: Build rpm packages […]

I wasn’t sure whether I would make it to Linuxdays Graz (GLT15) this year so I didn’t participate in its call for lectures. But when meeting folks on the evening before the main event I came up with the idea of giving a lightning talk as special kind of celebrating the Debian jessie release. So […]

Repeating what I did for the last Debian release with the #newinwheezy game it’s time for the #newinjessie game: Debian/jessie AKA Debian 8.0 includes a bunch of packages for people interested in digital forensics. The packages maintained within the Debian Forensics team which are new in the Debian/jessie stable release as compared to Debian/wheezy (and […]

For one of our customers we are using the Open Monitoring Distribution which includes Check_MK as monitoring system. We’re monitoring the switches (Cisco) via SNMP. The switches as well as all the servers support GBit connections, though there are some systems in the wild which are still operating at 100MBit (or even worse on 10MBit). […]

For a recent customer setup of Debian/wheezy on a IBM x3630 M4 server we used my blog entry “State of the art Debian/wheezy deployments with GRUB and LVM/SW-RAID/Crypto” as a base. But this time we wanted to use (U)EFI instead of BIOS legacy boot. As usual we went for installing via Grml and grml-debootstrap. We […]

On 22nd of October 2004 an event called OS04 took place in Seifenfabrik Graz/Austria and it marked the first official release of the Grml project. Grml was initially started by myself in 2003 – I registered the domain on September 16, 2003 (so technically it would be 11 years already :)). It started with a […]

Docker is an open-source project that automates the deployment of applications inside software containers. I’m responsible for a docker setup with Jenkins integration and a private docker-registry setup at a customer and pre-ordered James Turnbull’s “The Docker Book” a few months ago. Recently James – he’s working for Docker Inc – released the first version […]

Kamailio is an Open Source SIP Server. Since beginning of March 2014 a new setup for Kamailio‘s Debian packages is available. Development of this setup is sponsored by Sipwise and I am responsible for its infrastructure part (Jenkins, EC2, jenkins-debian-glue). The setup includes support for building Debian packages for Debian 5 (lenny), 6 (squeeze), 7 […]

In a project I recently worked on we wanted to provide a jenkins-debian-glue based setup on Amazon’s EC2 for building Debian and Ubuntu packages. The idea is to keep a not-so-strong powered Jenkins master up and running 24×7, while stronger machines serving as Jenkins slaves should be launched only as needed. The project setup in […]

Problem description: One of my customers had a problem with their Selenium tests in the Jenkins continuous integration system. While Perl’s Test::WebDriver still worked just fine the Selenium tests using Ruby’s selenium-webdriver suddenly reported failures. The problem was caused by Debian wheezy’s upgrade of the Iceweasel web browser. Debian originally shipped Iceweasel version 17.0.10esr-1~deb7u1 in […]

Update on 2014-03-03: quoting Colin Watson from the comments: Note that this is spelled GRUB_ENABLE_CRYPTODISK=y in GRUB 2.02 betas (matching the 2.00 documentation though not the implementation; not sure why Andrey chose to go with the docs). Since several people asked me how to get such a setup and it’s poorly documented (as in: I […]