A Random Walk Down Tech Street

Cross posted with this_ Project Atomic Blog post Introduction Openshift Origin is the upstream project that builds on top of the Kubernetes platform and feeds into the OpenShift Container Platform product that is available from Red Hat today.

Cross posted with this_ Red Hat Developer Blog post Introduction Kompose is a tool to convert from higher level abstractions of application definitions into more detailed Kubernetes artifacts.

Cross posted with this_ fedora magazine post Last week the Fedora Project released Fedora 25.

Disclaimer I am not a Go expert so I may not be able to answer questions you may have about this process.

Introduction I recently picked up a new Lenovo T460s work laptop.

Introduction In the open source docker engine a new networking model was introduced in docker 1.9 which enabled the creation of separate "networks" for containers to be attached to.

History In the past I have configured my personal computers to be able to snapshot and rollback the entire system.

cross posted from this_ fedora magazine post Introduction We're trying to focus more on developer experience in the Red Hat ecosystem.

UPDATE - 2018-02-01: I was informed by @nmccrina that the repo linked to in this post is no longer maintained.

Background The CentOS community is trying to build an ecosystem that fosters and encourages upstream communities to continuously perform integration testing of their code running on the the CentOS platform.

Intro As part of the Container Tools team at Red Hat I'd like to highlight a feature of Atomic App: support for execution via OpenShift's cli command oc new-app.

By now most Fedora email lists have been migrated to Mailman3.

Cross posted with this_ fedora magazine post Since the release of Fedora 22, Fedora began creating Vagrant boxes for cloud images in order to make it easier to set up a local environment for development or testing.

Cross posted with this_ fedora magazine post This week was the release week for Fedora 23, and the Fedora Project has again worked together with the DigitalOcean team to make Fedora 23 available in their service.

Cross posted with this_ fedora magazine post Inspired mostly from a post_ by Lars Kellogg-Stedman.

Intro Kubernetes is (currently) missing an integrated dns solution for service discovery.

cross posted from this_ fedora magazine post Hey everyone!

Intro Using cloud-init to bootstrap cloud instances and install custom sofware/services is common practice today.

History In part 1 of this series I discussed why I desired a computer setup where I can do full system snapshots so I could seamlessly roll back at will.

The Problem For some time now I have wanted a linux desktop setup where I could run updates automatically and not worry about losing productivity if my system gets hosed from the update.

Typically when installing major linux distros they make it easy to select encryption as an option to have encrypted block devices.

Red Hat Summit was a blast this year.

It has generally been difficult to test new updates for the rpm-ostree or ostree packages for Atomic Host.

cross posted from this_ fedora magazine post DigitalOcean is a cloud provider that provides a one-click deployment of a Fedora Cloud instance to an all-SSD server in under a minute.

Hey everyone!

This blog has been running on Docker on Fedora 21 Atomic Host since early January.

Most of the time when I really want to figure out what is going on deep within a piece of software I break out strace and capture all the gory detail.

cross posted from this_ fedora magazine post It's raining Droplets!

I often like to formulate detailed steps when trying to reproduce a bug or a working setup.

Recently I have been trying to debug some problems with cloud-init in the alpha versions of cloud images for CentOS 7 and Fedora 21.

I need to copy a few files into my docker container..

Sometimes it can be useful to have a docker image with just the bare essentials.

Introduction I often find that my tastes for hard drive configurations on my installed systems is a bit outside of the norm.

Introduction Some time ago I wrote a few posts ( 1, 2 ) on how to use script to record a terminal session and then scriptreplay to play it back.

Introduction Docker is an emerging technology that has garnered a lot of momentum in the past year.

Introduction I have been running my home desktop on thin logical volumes for a while now.

Introduction I decided this year to take part in the Fedora Virtualization Test Day on October 8th.

Introduction I have been using BTRFS snapshots for a while now on my laptop to incrementally save the state of my machine before I perform system updates or run some harebrained test.

I ran across a great PDF from this year’s Red Hat Summit in Boston.

Introduction Want to take advantage of the efficiency and improved snapshotting of thin LVs on an existing system?

What are RPM file colors?

Traditionally with LVM snapshots you need to be especially careful when choosing how big to make your snapshots; if it is too small it will fill up and become invalid.

Ever needed to find the IP address of a particular guest?

In an earlier post I walked through reclaiming disk space from guests using FSTRIM and in a follow up I showed how to do the same thing with thin Logical Volumes as the sparse backing storage for the disk images.

In my last post I showed how to recover space from disk images backed by sparse files.

Sparse guest disk image files are a dream.

getopt is extremely useful for quickly being able to add options and arguments to your program without having to worry much about the parsing yourself.

Sometimes you just want to boot Anaconda from a software raid device that houses both the stage1 (initrd.img) and stage2 (install.img) images.

I recently decided to try out the snapshotting capabilities of the relatively new BTRFS filesystem.

Benchmarking software can be invaluable when testing new hardware/software configurations.