Generating a memberOf attribute for posixGroups

Mon 22 July 2013 by Lars Kellogg-Stedman Tags ldap

This showed up on #openstack earlier today:

2013-07-22T13:56:10 <m0zes> hello, all. I am looking to setup keystone with an ldap backend. I need to filter users based on group membership, in this case a non-rfc2307 posixGroup. This means that memberOf doesn't show up, and that the memberUid in the group is not a dn. any thoughts on how to accomplish this?

It turns out that this is a not uncommon question, so I spent some time today working out a solution using the dynlist overlay for OpenLDAP.

read more

Split concatenated certificates with awk

Tue 16 July 2013 by Lars Kellogg-Stedman Tags awk

This is a short script that takes a list of concatenated certificates as input (such as a collection of CA certificates) and produces a collection of numbered files, each containing a single certificate.

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17 …
read more

Did Arch Linux eat your KVM?

Mon 08 April 2013 by Lars Kellogg-Stedman Tags archlinux virtualization kvm

A recent update to Arch Linux replaced the qemu-kvm package with an updated version of qemu. A side effect of this change is that the qemu-kvm binary is no longer available, and any libvirt guests on your system utilizing that binary will no longer operate. As is typical with Arch …

read more

I2C on the Raspberry Pi

I've set up my Raspberry Pi to communicate with my Arduino via I2C. The Raspberry Pi is a 3.3v device and the Arduino is a 5v device. While in general this means that you need to use a level converter when connecting the two devices, you don't need to …

read more

Interrupt driven GPIO with Python

Fri 08 March 2013 by Lars Kellogg-Stedman Tags raspberrypi hardware

There are several Python libraries out there for interacting with the GPIO pins on a Raspberry Pi:

All of them are reasonably easy to use, but the Quick2Wire API provides a uniquely useful …

read more