Life

Well, I needed a way to watch the mdstat progress (because a disk just failed …). 1 2 3 #!/bin/bash watch -n1 cat /proc/mdstat

Well, I have a few movies and series that ain’t represented in TMDB/TVDB. So here’s a little script, that will parse over any video files, check if a thumb file is already present, and if not generate one using ffmpegthumbnailer… 1 2 3 4 5 6 7 8 #!/bin/bash find /srv/smb/tv/ -name "*.wmv" -o -name "*.avi" -o -name "*.mp4" \ -o -name "*.mkv" | while read file; do if [ ! -f "${file%.*}-thumb.jpg" ] ; then fmpegthumbnailer -i $file -o "${file%.*}-thumb.jpg" -s 0 &>/dev/null fi done

Well, I recently had to flatten my archive NAS (well only the OS part … wheeeh). Since I didn’t have the chance to backup the old settings I had to do everything from scratch … And this time I decided, I wasn’t doing a script but rather the proper way. I spent a while reading through the Internetz about the various settings until I stumbled upon a Frauenhofer Wiki entry. From there I ended up writing those udev-rules and the sysctl configs… ...

So, when I create (or add RAID disks) I have this handy sfdisk template (I created once when I first added the 2TB disks): 1 2 3 4 5 6 7 root:(charon.ka.heimdaheim.de) PWD:~ Wed Jul 09, 15:13:04 [0] > sfdisk -d /dev/sdj > ~/raid-disk-template.sf root:(charon.ka.heimdaheim.de) PWD:~ Wed Jul 09, 15:13:04 [0] > cat ~/raid-disk-template.sf # partition table of /dev/sdj unit: sectors /dev/sdj1 : start= 2048, size=3906793472, Id=da So, if I wanted to add more disks, I’d just have to run the following: ...

Well, another day - another UCS error. Out of the blue, one of our chassis started displaying that one PSU had failed, however the UCS was showing no PSU had failed 🤷 Well, as it turns out - this is yet another known bug in 2.0.2(r). You’ll either have to unplug and plug all the power cables (that’s four) in a maintainance window - or simply change the Equipment Power Policy (found in the Root of your UCS, tab Policy) ...

Well, I wanted independent SpamAssassin Bayes databases per user (different users, different preferences). For that, RoundCube already set up the Junk folder. However, I wanted the ability (for myself, as well for my other users) to individually mark messages as either Spam or Ham. RoundCube: Inbox view Now, as I said before I wanted a trivial way to mark messages as Spam or Ham (without using the command line each time). ...

As I wrote before, we have a bunch of filers (and a ton of volumes w/ luns on them), that I need to monitor. At first, I tried the existing NetApp Nagios-Plugin(s), but they all use SNMP and with that I can either watch all volumes or none. And that didn’t satisfy me. Don’t get me wrong, the existing plugins are okay and I still use them for stuff (like GLOBALSTATUS or FAN/CPU/POWER) which isn’t present in the API or real hard to get at, however I wanted more. So I ended up looking at the NetApp API, and ended up writing a “short” plugin for Nagios using Perl. Maybe if I’m ever bored, I’ll rewrite it using C, but for now the Perl plugin has to suffice. So far the plugin supports the following things: Monitoring FlexVolumes (simply watching the free space) Monitoring LUN space (the allocated space inside a FlexVolume for iSCSI/FC LUNs) Monitoring Snapshot space (the allocated space inside a FlexVolume for Snapshots) Monitoring SnapVault relations (and their age) Monitoring SnapMirror relations (and their age) The plugin will return performance data for most (if not all) of those classes. It needs a user on the filer you wish to monitor - which sadly needs to have the admin role.

Well, I’ve been moving stuff to my archive NAS, and in case anyone is wondering - the DS213+ actually nearly gets to the 1GE transmission limit… It’s near the CPU limit then anyhow, but … 😄

As the title pretty much tells, I’ve been working on fixing the Root-Disk-Multipathing feature of our XenServer installations. Our XenServer boot from a HA-enabled NetApp controller, however we recently noticed that during a controller fail-over some, if not all, paths would go offline and never come back. If you do a cf takeover and cf giveback in short succession, you’ll end up with a XenServer host that is unusable, as the Root-Disk would be pretty much non-responsive. ...

Well, I’ve been fiddling with OpenWRT to replace my crappy Vodafone Easybox 602. Up till now I had DD-WRT on the DIR-615’s (yes, two) however recently (I think due to the Synology DiskStation in combination with a WDS setup) I had to filter SSDP broadcasts storms (which in turn kill the Easybox), which isn’t quite so easy on DD-WRT, but rather easy on OpenWRT. Today I went thinking about VLAN-Tagging and stuff, and I had to figure out the physical to logical port mapping for the DIR-615. So let’s run swconfig dev rt305x show on the DIR-615 after plugging in the RJ45 cable to a port. ...