Everything is a Freaking DNS problem

So earlier today I was fighting with

bond1: error fetching interface information: Device not found

I had a machine with 4 nics that I wanted to bond 2 by to. I had no problem getting the bond0 device up witn any of the interfaces, however getting a bond1 up always resulted in the above error.

The friendly guys from #centos on freenode pointed me to the missing config.

options bonding mode=4 max_bonds=4

The important part being max_bonds
it seems that the default is 1 so adding one more fails.

So once in a while you get to take over the management of a machine someone installed with no documentation, with lots of playing around and no clue on how it should be reproducible. You're pretty sure that if you reboot the machine it won't come up with the right services, or in this case with the right Virtual machines up and running.

So I got this box with about 7 different xen configs in /etc/xen and none in /etc/xen/auto .. however different lvm volumes were created and 3 virtual machines were running. The different xen configs looked all the same.
web1, web, web.orig, web.working you know :(

So my challenge was to figure out the config of the running virtual machines
Luckily I bumped into some Redhat articles that tought me virsh dumpxml
Now I`m not really a fan of xml based config but it got me quite far.

Eg. on one of my own machines the output looks pretty good.

web.hs62.be
f7cb62b9d3aa8a07489604285fe3d842

linux
/boot/vmlinuz-2.6-xen
/boot/initrd-2.6-xen.img
/dev/sda1 rw
selinux=0 3

524288
1
destroy
restart
restart

As I made the decision to leave X-Tend about 2 weeks ago, normally Wednesday would be my last day, but it seems my accounts have already been closed.

So my Kris.Buytaert@x-tend.be address isn't valid anymore.

Only a month ago I predicted

Xen on Flash ?
Next step, let's kick the bios out.

Today Xen Source Announced exactly what I predicted.

I can only conclude that indeed Virtualisation as a separate product will be obsolete soon.

So today is the last day of LinuxConference Europe , down the stairs in the same building there a bunch of weirdos sitting at round tables for some highly elite and secret meeting. , also known as the KernelSummit.

I just heard someone say that they are figuring out which new bug they are planning to introduce into the new kernels.

I`m in LMB's tutorial on Linux HA, so I`ll be musing about one of my favourite topics today :)
Or I`ll just pay attention ;)

I`m wondering why Lars just modified one of his slides... maybe I`ll ask him over Lunch...

Dirk Hohndel told us that we should really become more polite on LKML and stop calling people pummel, twat, stupid clueless or braindead . Yes even Linus should.

Over lunch I figured out that we are not 10 .be folks but 12 .. yay !

Bdale is talking about GNU Radio after that it's GIT Time

Frank.be will be very happy to see that the majority of talks here in Cambridge this morning were focusing on Power Consumption. Arjan van de Ven started of introducing us to powertop. Then Matthew Garret continued with a talk on making Linux suck less (power)

It clearly shows that this LinuxConference will be followed by the Kernel summit as lots of familiar faces start to show up here .

Robert McQueen is talking about Telepathy now so i`m gonna keep quiet for a while .. coz I`m sure he can read my mind now :))

Sunday evening was the conference dinner, someone tought he was really funny to have us all walk about 3Km more than we needed to. The instructions on the back of our entrance tickets gave us a full tour of the Cambridge suburbs, I should have followed my guts.. not the people trying to read the instructions, would have saved us half an our at least .
Luckily we took the short way back. Dinner was typically english .. nuff said :)

So monday started out with a whole bunch of sessions related to filesystems and storage.
Bryn M Reeves gave a really good intro to LVM , then Jan Blunck took over and started talking about how to scale the Device Mapper snap shot solution. I tried to see Dag's talk on dstat but I`ll have to try again at T-Dose as I missed the largest part of the talk due to some phone calls :(
Next up was Olaf "thank god I`m not doing nfs anymore" Kirch (who also listens when you just shout Lars in the streets of Cambridge) who introduced us to iSNS.

So after lunch the filesystem track continued with Steven Whitehouse talking about VFS and cluster filesystems , Jorn talking to us about the future of Flashdisks ant their appropriate filesystems, and Chris Mason from Oracle finishing of with a talk on Btrfs.. pronounced "ButterFS"

There were 2 different busses to the Duxford air museum which was a bit of a pity since both groups didn't really meet eachother, so it wasn't really a social event where you could chat and meed with everybody at the conference.

Couple of people again have asked me where I got the t-shirt

I actually made it myselve and you can buy it from Spreadshirt

Dear Linux.conf.au organisation, you might have read the interview with Linus on APCMag . You probably noticed it yourselve .. but there was a small hint in there to a possible future Linux.conf.au location :

One of these days I hope to find myself on the Great Barrier Reef and do scuba diving (which I love), but for some reason I've always ended up in other parts.

So might I suggest Brisbane some time soon as a Linux.conf.au location ? :)