First there are a few things to consider and configure before creating new virtual machines (DomU). Loopback vs LVM Transfering a file is easier than moving lvm volumes to servers. As the DomU will run services in production, lvm is the better choice. Other possibilities for more portability: Docker, XenServer Cluster, OpenStack XL config Modify…
Author: Damian
web psychiatrist, linux lover, microcontroller newbie
Xen management – xl instead of xm toolstack
Outdated. Short YouTube video about why to switch from xm to xl. xend is depricated since Xen 4.1. Thus .. watch First crash was with xen-create-image. Failed with Running command ‘/usr/lib/xen-4.4/bin/xl create /etc/xen/srv-sz-1.cfg 2>&1’ failed with exit code 768. Aborting Well, default toolstack in /etc/xen not set.
XenServer 6.5 released OpenSource
Recently I read a nice blog article about Xen and Docker and why it is useful to have them both. Development on Open Source XenServer is active. Together with docker it feels like being on the right track! Go here to give XenServer a go: http://xenserver.org/open-source-virtualization-download.html Managing XenServer cluster using web interface can be done…
Skip or force fsck on reboot Debian
Reboot without fsck Rebooting debian server skipping fsck run on boot: user@server:~# sudo shutdown -rf now Reboot with fsck Rebooting debian server forcing fsck run on boot: user@server:~# sudo shutdown -rF now Another solution is to create a file called forcefsck. user@server:~# sudo touch /forcefsck
Arduino using FastLED library with WS2812B
Beginning with WS2812B you might want to use FastLED (former FastSPI_LED). Control all known (https://github.com/FastLED/FastLED/wiki/Overview) LED stripes using this single library by adjusting a few lines. Base examples are quickly set up. Since im located in Germany I found WS2812B on eBay (Aliexpress cheaper if waiting time does not matter). Great experience with ebay seller…
Howto Xen 4.4 on Debian Jessie at Hetzner
Introduction This instructions are for base installation of Xen hypervisor on Debian Wheezy/Jessie server on Hetzner root server. First we are going to install useful linux tools. After installation and configuration of Xen on Debian, we are doing the network setup with IPv4 and IPv6. There is a difference wheter you buy a IP address subnet or single additional…