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Category Archives: Virtualization
Setup Gentoo on a Hetzner server
I really like Gentoo for their awesome package manager, Portage. Gentoo is a really flexible distribution that you can customize (and break) in many ways. It’s a good opportunity to learn a lot about linux. I documented the installation process. … Continue reading
Posted in General, Linux, Virtualization
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systemd-networkd configuration
Systemd is used in all major Linux distributions. One of the components, systemd-networkd, provides a unified way to manage network interfaces and related settings (like routes, MTU) in a inifile-like way. This is quite awesome because it enables system administrators … Continue reading
Posted in General, Linux, Virtualization
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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
Posted in 30in30, General, Internet found pieces, Linux, Nerd Stuff, Virtualization
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Why Openstack sucks
I got asked to write a few sentences about openstack and why I don’t like it (anymore). Background: I’m working at one of the largest hosting provider in europe, HEG. We got asked a few times if we want to … Continue reading
Posted in General, Linux, Virtualization
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Tweet des Tages
Spotted an ad for a "Senior Linux DevOps Site Reliability AWS Engineer." I'm guessing it looks a bit like this. pic.twitter.com/esKjj8Ikah — Chris Wahl (@ChrisWahl) 5. August 2015
Posted in General, Internet found pieces, Linux, Nerd Stuff, Virtualization
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Cloud Instanzen optimieren
Viele Administratoren haben in VMs jahrelang ext3 als Dateisystem eingesetzt. Bei lokalem Storage ist dies durchaus sinnvoll, da das Dateisystem robuster gegen Timeouts ist als ext4. Wie im Post zur Umstellung auf virtio-scsi erklärt will man spätestens bei verteiltem Storage … Continue reading
Posted in General, Linux, Virtualization
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Warum Openstack kacke ist
Ich bin kein Freund von Openstack und hatte das schon mehrfach begründet, Martin Loschwitz hat dazu einen Talk gehalten mit den gleichen Argumenten:
Posted in General, Internet found pieces, Linux, Virtualization
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Links der Woche
Neue Woche – Neue Links: A curated list of resources for learning about application security Stellt in Fragerunden/IRC/Forum nicht eine Frage zu eurer kaputten Lösung, fragt nach dem Problem das Ihr lösen wollt tumblr Bildblog zum BOFH Noch ein Tumblr … Continue reading
Posted in General, Internet found pieces, Linux, Puppet, Virtualization
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CentOS VM von virtio-blk auf virtio-scsi umstellen inkl. discard
Zur Zeit nutzen die meisten Menschen virtio-blk als Storage Treiber unter Qemu. Möchte man aber neuere Storage Backends wie Ceph oder Trim Support, wird virtio-scsi benötigt. Die nötigen Anpassungen in der Domain.xml via virsh edit Domain sind schnell erledigt. Hier … Continue reading
Posted in General, Nerd Stuff, Virtualization
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Arch systemd-nspawn Container erstellen
Manchmal benötigt man fix einen Container vom aktuellen Betriebssystem, z.B. um eine saubere Umgebung zum kompilieren oder zum testen zu haben. Auf Arch bietet sich dafür systemd-nspawn an. Zuerst installieren wir die benötigten Pakete in irgendein Verzeichnis, danach starten wir … Continue reading
Posted in General, Linux, Short Tips, Virtualization
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