Well … that was fun

So … I’ve had this blog since 2005. I installed it from original sources. And WP made upgrades in the 2.x time frame, quite painless. Or so it seemed. Slowly, over time, some configuration/settings/whatever got out of whack. And with the last update, from a system originally installed in final form in 2013 or so, … Read more

OpenLDAP + sssd … the simple guide

Ok. Here’s the problem. Small environment for customers, whom are not really sure what they want and need for authentication. Yes, they asked us to use local users for the machines. No, the number of users was not small. AD may or may not be in the picture. Ok, I am combining two sets of … Read more

When the revolution hits in force …

Our machines will be there, helping power the genomics pipelines to tremendous performance. Performance is an enabling feature. Without it you cannot even begin to hope to perform massive scale analytics. With it, you can dream impossible dreams. This article came out talking about a massive performance analytics pipeline at Nationwide Children’s Hospital in Ohio. … Read more

stateless booting

A problem I’ve been working on dealing with for a while has been the sad … well … no … terrible state of programmatically configured Linux systems, where the state is determined from a central (set of) source(s) via configuration databases, and NOT by local stateful configuration files. Madness lies in wait for those choosing the latter strategy, especially if you need to make changes.
All sorts of variations on the themes have been used over the last decade or so, with this. Often programmatic things like Chef or puppet, are there to do a push of configuration to a system. This of course breaks terribly with new systems, and the corner cases they bring up.
Other approaches have been to mandate one particular OS and OS version, combined with a standard hardware configuration. Given how hardware is built by large vendors, that word “standard” is … interesting … to say the least.

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