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Building an OpenShift Lab: Why I Used Atomic Host

By on Mar 30, 2017 in Article

RHEL Atomic Host requires a lot less configuration than a full RHEL Server installation. The docker daemon is installed and configured, storage is already setup to use device mapper on a dedicated LV, and the default tools necessary to install OpenShift are already installed. And as a bonus, the installation on my laptop in KVM virtual machines is about 10X as fast as installing a full RHEL installation.

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Deep Dive: Rebasing vs. Backporting

By on May 19, 2014 in Article

Contents Background Impetus Vocabulary Rebasing Backporting Open Source Infrastructure Software Kernel Use Cases Kernel Versions Brief History Conclusion   Background Impetus Recently, I saw a discussion was started, asking about the importance of the operating system on the LinkedIn OpenStack group: Ubuntu can overtake Red Hat in private clouds because the OS...

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CentOS Post Mortem & Analysis

By on Mar 28, 2013 in Article

Background I manage the crunchtools lab and the infrastructure for this blog similar to a development data center. I have a rigorous weekly checklist, which includes optionally applying operating system patches as they are available. I do not perform the updates every week because of time constraints, but when I do, I patch all of the systems. Most of my...

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KVM Cluster with DRBD/GFS

By on Jul 6, 2010 in Article

Contents Background Architecture Hardware Inventory Software Inventory Network Inventory Installation Operating System Storage Operating System Data Storage Bonded Interfaces Bridge Interfaces (VLAN) DRBD GFS2 KSM Final Notes Testing & Performance Analysis Disk I/O GFS2 Bonnie++ iostat ifstat   Background Recently, I started a project at ( to...

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