Many years ago, when I first started working at Red Hat, I worked up a package management domain model diagram. I’ve referred to it many times over the years, but have never posted or explained it in detail. Recently, discussions over image building software caused me to refer to it a few times. Here it is, with annotations below.
Continue readingThis one is going to be a little light on details, as we are still working through it, but I’d just like to share what I’ve been working on the past couple weeks. Note that this is for a proof-of-concept cluster, and is not for production.
Continue readingUsing a customer nameserver often requires disabling the DHCP based resolv.conf modifications. Here is what I got to work.
Continue readingWhen building a strategy for computing, we need to think large scale. I’ve been trying to frame the discussion in terms of a million nodes in a dozen data centers. How is OpenStack going to be able to handle this?
Continue reading#!/bin/sh docker images | awk ' BEGIN {print ("<table>")}; /REPOSITORY/{ print("<tr><th>" $1,"</th><th>" $2,"</th><th>" $3,$4,"</th><th>" $5"</th><th>" $6"</th></tr>")} /MB/{ print ("<tr><td>" $1,"</td><td>" $2,"</td><td>" $3,"</td><td>" $4,$5,$6 "</td><td> " $7,$8 "</td></tr>")} END {print ("</table>")}' |
Kolla has become the primary source of Containers for running OpenStack services. Since if has been a while since I tried deliberately running just the Keystone container, I decided to build the Kolla version from scratch and run it.
Continue readingNow that I can list the group names, I want to be able to list the member of the groups.
Continue readingNow that I know I can read a single group, the next step is to iterate.
Continue readingThe world continues to embraces Rust for its safety properties. While writing utilities in Rust, we are going to have to work with existing code to perform common tasks. I recently needed to list the set of Linux groups registered on a system, and get access to the users assigned to each. Here’s my notes of what I learned.
Continue readingI’m writing a simple utility for manage the /etc/hosts file. I want it in a native language so I can make it SUID, or even better, to lock it down via capabilities. I want to remember how to code in rust. Once I get a simple bit working, I want to refactor. Here’s what I did.
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