apple, jailbreaking, and debconf in manhattan?!

Well, while I tangle around with annoying conflicts between Xen and NetworkManager I might as well post something semi-related to computing. Today it's Apple's anti-jailbreaking plea. Right off the bat they point to their end user license "agreement" and claim that people who bought an iPhone or iPod Touch somehow agreed to this mystical EULA that's somehow signed at point of sale. Nevermind the fact that EULAs are non-negotiable, involve no transfer of title, money, or services, and frequently never even get shown to the user.

But enough about that. Apparantly DebConf 10 is going to be in New York City. Right next to where I live. That's great. I didn't go to DebConf this year, despite Arthur Liu recommending it to all the GSoCers. Mostly due to paranoia over airline security and US customs searching my laptop.

Debian is apparantly going to actually have release deadlines, albeit every other year as opposed to twice a year like Ubuntu. Still, it's nice to see a commitment to releasing. My first experience with Debian was a while back, when all the worthwhile packages were still in testing.

Hopefully, tomorrow I can get Xen working again. Xend won't start, something about an 'invalid dom0 state'. I suspect it has something to do with the fact that NetworkManager manually configures peth0 when it shouldn't, requiring me to fix up the routing tables. Worst comes to worse I'll have to try and run Xen and euca on my desktop, which is just barely compatible with Debian.

One of the things I'd like to do for VMbuilder is have it automatically package the Linux kernel and ramdisk into Eucalyptus, if the user opts for it. You can already upload new kernels and ramdisks with Eucalyptus/euca2ools provided your cert has the appropriate rights on the cloud. see [0]

[0] http://open.eucalyptus.com/wiki/EucalyptusImageManagement_v1.5.2

lenny vmbuilder with xen, debconf, I discover key visualization

Well, the current VMBuilder available on the git archive[0] now supports building Lenny on vanilla Xen. We're very close to building AMIs, I can almost taste it. (The reason why you haven't heard about this until today is that accessing Blogger is super-finnicky when not logged in for absolutely no reason at all. My apologies for the lack of updates on this blog.) Additionally we're starting to actually put documentation and stuff on the wiki [1,2,3] about the GSoC project and euca2ools.

The next step is to look at a few packages called 'ec2-init' and 'ec2-modules'. They only exist in Ubuntu right now, and I purposefully disabled VMBuilder from installing them on Debian so far since Debian doesn't have them. That, and I believe I should pick out a suitable AKI/ARI combo sometime (the AKI info in the Debian plugin is just a placeholder right now). This shouldn't take too long. I would like to get the VMBuilder changes in Debian soon, and hopefully get those changes in the VMBuilder trunk[4] too.

My project was part of the Debconf talk on the Debian GSOC projects which I believe was 2 or 3 days ago. I'd look up the presentation and watch it but right now I have my friend begging me to install Ubuntu for him so he doesn't have to use Vista anymore.

[0] git://git.debian.org/git/pkg-escience/vmbuilder.git
(that's a lotta gits)
[1] http://wiki.debian.org/VMBuilder
[2] http://wiki.debian.org/euca2ools
[3] http://wiki.debian.org/DavidWendt/GSOC09Project
[4] https://launchpad.net/vmbuilder

euca2ools, kmeisthax@Lappy-486.A, and other annoyances

Well, it's finally out so I can tell you all about it: euca2ools, the fabled free software EC2 API client! Unlike a certain other company's tools, these don't have onerous usage restrictions. Yes, our VMBuilder[0] already supports using it as opposed to Amazon's tools, it defaults to Euca tools then Amazon's tools. (Block the usage of either using --ec2-no-amazon-tools or --ec2-no-euca-tools, keep in mind you still need one or the other to bundle or upload.)

And another thing... I recently took a look at the git repo [0], and noticed it's littered with commits by "David Wendt (kmeisthax@Lappy-486.A)"... please ignore the screwed-up e-mail address, I reinstalled Debian and forgot to change it to my normal address. (which is dcrkid (a) yahoo () com)

[0] git://git.debian.org/git/pkg-escience/vmbuilder.git

My current method for tracking/gitifying changes in foriegn VCSes

In vmbuilder.git we deal with a lot of upstream branches on launchpad being tracked with bazzar. So, I have to convert those revisions to git commits. This is how I handled importing a new branch from launchpad that branched from Bzed's r344 today:

#grab the revision

bzr branch lp:~ckaenzig/+junk/lenny

cd vmbuilder

#go to the point this revision branches from - note that this is a tag and not a branch

git checkout bzed_vmbuilder_debian-r344

#make a new branch for the underlying bzr branch

git checkout -b ckaenzig_junk_lenny

#clear out the current git working area, to reflect any RMs in the bzr revision

git rm * -r

#clear out any untracked files, such as .pyc and .py~

rm * -rf

#copy the revision over to the git repo, and stage it

cp ../lenny/* . -r

git add * -r

#make a new commit on this branch, which should now reflect the underlying bzr revision.

git commit -m "New bzr branch lp:~ckaenzig/+junk/lenny"

#tag the commit by it's underlying bzr revision number for easy reference

git tag ckaenzig_junk_lenny-r346 -a

This process generally works, but it requires careful attention and is easy to screw up. For example, I have to do a second rm to remove files that aren't being tracked by git (.pyc, .py~ files) , otherwise I end up committing junk that might be from another branch entirely when I stage the new revision. Not to mention that I may miss a revision this way. Say I have a branch A in bzr that I've manually imported this way for revisions r100, r123, and I wanna import branch B which breaks off from branch A at r112, I have to either put the new git branch at r100 (and have slightly inaccurate commit history) or start moving commits around, which I've never tried and probably doesn't push well. Fortunately VMbuilder doesn't get that many commits per day so I usually am able to keep on top of 'em.

Is there an easier way to convert bzr revisions into git commits? I'm horribly unfamiliar with bzr, so I haven't really investigated automating this process.

yay mass commit bombs!

More work on VMbuilder - after fixing how the Debian plugin finds Xen kernels I got it to build a Xen image. (The Debian plugin was looking for images the way Ubuntu versions them, not the way Debian versions them) Now I need to figure out building EC2 images and such.

And send bzed a patched distro.py.

Stop clobbering my bootloader!

During this past weekend I tried to get Windows XP, Windows 7, OSX, Debian, and Ubuntu all on one machine. Due to some mishaps, driver oddities with Windows 7, and other things, I had to install certain operating systems multiple times. Now, the problem is, each operating system has it's own peculiar way of loading. Linux uses GRUB, Windows XP has NTLDR, 7 has the Windows Boot Manager, etc. Most of these operating systems also decide it would be helpful for the end-user that when his computer reboots, it can actually load the new OS. That's great, but I already have a bootloader.

I have a partition at /dev/sda5 which contains a GRUB installation. That's supposed to handle every OS's own method of booting, including the Linux installations which have their own GRUBs on their own partitions. But when you decide to overwrite the MBR, I don't get your nice and shiny OS. A good number of OSes use an MBR that won't boot an extended partition anyway. So instead of seeing your bright and shiny new OS, I see "NTLDR is missing". Or the ever-so-helpful "boot0: error". I'm -lucky- if I even get an OS at all, much less one that can load the grub shell so I can fix what you broke.

I understand having 3 GRUB installations plus a whole bunch of other bootloaders isn't exactly a standard use case. Most people don't go beyond dual-boot. But please, for the love of all that is holy, please just put a little checkmark somewhere,"Do not replace MBR". Ubuntu and Debian are the only OSes that actually give you that option in some form.

Or better yet, let's all just standardize on GRUB. Sure, it's not perfect, but it's as flexible as you can get.