HAProxy - a journey into multithreading (and SSL)

I'm running some load balancers which are using HAProxy to distribute HTTP traffic to multiple systems. While using SSL with HAProxy is possible since some time, it wasn't in the early days. So we decided for some customers, which was in need to provide encryption, to offload it with Apache.…

Redis HA with Redis Sentinel and VIP

For an actual project we decided to use Redis for some reasons. As there is availability a critical part, we discovered that Redis Sentinel can monitor Redis and handle an automatic master failover to a available slave. Setting up the Redis replication was straight forward and even setting up Sentinel.…

Chemnitzer Linuxtage 2014 ahead

As Jan has previously announced, the Debian project is maintaining a booth at Chemnitzer Linux-Tage 2014, which is also organized by him. This year we will have merchandising at the booth, which is provided by Alexander Wirt and of course a demo system with Debian wheezy BabelBox as the past…

Crossbuilding Debian packages with sbuild (for Raspbian)

Yesterday I asked myself, how to setup a crossbuild environment on a Debian wheezy/amd64 to build binary packages compatible for Raspbian. After digging around it seemed to be the easiest way to use mk-sbuild to setup such a build environment. We just need to install sbuild (>= 0.64.…

Running icinga with lighttpd on Debian whezzy (and a Raspberry)

At first we need to install Icinga and lighttpd: # aptitude install icinga lighttpd We need to enable the lighttpd cgi and authentication module: # lighttpd-enable-mod cgi && ighttpd-enable-mod auth Let's create a config for Icinga (in a subdir of the default vHost). As you can see, you don't need any…

Chemnitzer Linux-Tage 2013!

Also this year the Debian project was present at Chemnitzer Linuxtage, this time right next the debianforum.de booth. The booth folks arriving on Friday organized a flashmob at Expitas after booth setup. Unfortunately our second planned flashmob at the Mensa was boycotted by much more students, so we ended…

Chemnitzer Linux-Tage 2013?

Also this year I registered a booth in the name of the Debian Project at Chemnitzer Linux-Tage. Unfortunately this is the second time in the row, that we seem to be short of manpower while preparing the booth. Actually just one person was able to commit his available time. A…

Creative destruction

Today short before ending business hours I was noticed that there is a problem with a server system (domU). Login with unprivileged user was possible but using "su" didn't worked, also login in as root via privkey failed. Fortunately I was able to connect via xen console and…