Dinosaurs are Forever: March 2014

Monday, March 24, 2014

netfilter hooks to snoop packets

I've written a short netfilter hook to help snoop some outgoing packets. You can view the source code here [1]. I read a few articles [2] [3] [4] to get an idea of how to put things together.

Wednesday, March 5, 2014

trusty release party

Come celebrate the release [1] of the next Ubuntu LTS 'Trusty Tahr' 14.04 in Austin!

Wednesday, April, 16th, 5pm @ the Flying Saucer

So majestic!

creating a local vm easily and automatically

This is the nifty little snippet I use to create a quick and dirty VM for testing. Just apt-get install vmbuilder and run the following:

NAME="ubuntu"
vmbuilder kvm ubuntu --arch 'amd64' --suite 'precise' \
--rootsize '8096' \
--mem '1024' \
--components 'main,universe' \
--addpkg vim  \
--addpkg openssh-server  \
--addpkg bash-completion  \
--user 'ubuntu'  --pass 'ubuntu' \
-d /var/lib/libvirt/images/${NAME} \
--libvirt qemu:///system \
-o \
-v --debug \
--hostname ${NAME}

If you need additional help consult:
https://help.ubuntu.com/12.04/serverguide/jeos-and-vmbuilder.html

using LTS HWE kernels with MAAS nodes

Once you get machines setup using MAAS [1], you may want to be able to install an alternative kernel when starting a machine. Here's how to do it.

This is assuming we have already commissioned a node, but have not started it.

If we are using the _normal_ installer with MAAS do the following:
Edit /etc/maas/preseeds/preseed_master on your maas-server

Add the second line as shown:

d-i base-installer/kernel/image string linux-server
d-i base-installer/kernel/override-image string linux-generic-lts-saucy

Start the node,
Now when you boot you should be using the 3.11 series kernel.

Dinosaurs are Forever