Mapping local users to Kerberos principals with SSSD

Thu 16 July 2015 by Lars Kellogg-Stedman Tags sssd kerberos

I work for an organization that follows the common model of assigning people systematically generated user ids. Like most technically inclined employees of this organization, I have local accounts on my workstation that don't bear any relation to the generated account ids. For the most part this isn't a problem …

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OpenStack Networking without DHCP

In an OpenStack environment, cloud-init generally fetches information from the metadata service provided by Nova. It also has support for reading this information from a configuration drive, which under OpenStack means a virtual CD-ROM device attached to your instance containing the same information that would normally be available via the …

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Heat-kubernetes Demo with Autoscaling

Next week is the Red Hat Summit in Boston, and I'll be taking part in a Project Atomic presentation in which I will discuss various (well, two) options for deploying Atomic into an OpenStack environment, focusing on my heat-kubernetes templates.

As part of that presentation, I've put together a short …

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Suggestions for the Docker MAINTAINER directive

Mon 27 April 2015 by Lars Kellogg-Stedman Tags docker

Because nobody asked for it, this is my opinion on the use of the MAINTAINER directive in your Dockerfiles.

The documentation says simply:

The MAINTAINER instruction allows you to set the Author field of the generated images.

Many people end up putting the name and email address of an actual …

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Using tools badly: time shifting git commits with Workinghours

Fri 10 April 2015 by Lars Kellogg-Stedman Tags git hack

This is a terrible hack. If you are easily offended by bad ideas implemented poorly, move along!

You are working on a wonderful open source project...but you are not supposed to be working on that project! You're supposed to be doing your real work! Unfortunately, your extra-curricular activity is …

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