Configuring and using iSCSI
Posted on May 10, 2024
| dustymabe
Recently I looked into enabling and testing multipath on top of iSCSI for Fedora and Red Hat CoreOS. As part of that process I had the opportunity to learn about iSCSI, which I had never played with before. I’d like to document for my future self how to go about setting up an iSCSI server and how to then access the exported devices from another system.
Setting up an iSCSI server First off there are a few good references that were useful when setting this up.
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Using virtiofs with libvirt/virt-install
Posted on September 8, 2023
| dustymabe
Recently we switched our 9p filesystem usage in CoreOS Assembler to use virtiofs.
This is the technology behind a lot of new lightweight container VM technology like kata-containers and libkrun, but can also be easily used with libvirt.
Running as non-root using qemu:///session Currently the virtiofs integration doesn’t work as non-root via a qemu:///session connection. There is an oustanding RFE for this upstream and downstream in RHEL that can be followed for updates.
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Columbia University and Fedora CoreOS
Posted on August 1, 2023
| dustymabe
Earlier this summer I spoke at the Fedora 38 release party about Fedora CoreOS. As part of this I had the privilege of giving the presentation alongside Marc Pusey from Columbia University. Marc talked about how Columbia University uses Fedora CoreOS and his experience participating in the Fedora and Fedora CoreOS communities.
It was a real treat and quite nice to see Fedora CoreOS being applied in such diverse ways for research and learning.
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NetworkManager: Limiting Bond Subordinate devices by MAC Address
Posted on March 16, 2023
| dustymabe
Someone recently asked me about locking down a bond to specific NIC devices within the machine. Specifically they were concerned with the sometimes unpredictable nature of NIC naming in Linux.
While there has been a lot of effort to make NIC naming more predictable, it turns out with the networking configuration stack we are using in Fedora/RHEL (NetworkManager) you don’t even really need to care about the NIC device names if you know the MAC Addresses of the interfaces you want to use.
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Running FCOS on your Raspberry Pi 4
Posted on November 2, 2021
| dustymabe
Note: A more permanent version of this tutorial exists in the Fedora CoreOS documentation.
Fedora CoreOS recently started producing 64-bit ARM (aarch64) artifacts. These images can be used as the Operating System for the Raspberry Pi 4 device. Before trying to get FCOS up and running on your Raspberry Pi4 you’ll want to Update the EEPROM to the latest version and choose how you want to boot the Raspberry Pi 4.
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CoreOS install via Live ISO --copy-network
Posted on November 18, 2020
| dustymabe
A couple of us recently gave an update to our Customer Experience team at Red Hat on the improvements that were made in Red Hat CoreOS for OpenShift 4.6. My part of the presentation focused on the new Live ISO that is now used for Fedora/Red Hat CoreOS installations and also the improvements that we made for being able to copy the install environment networking configuration into the installed system via coreos-installer --copy-network.
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GCP Quickstart Guide for OpenShift OKD
Posted on October 7, 2020
| dustymabe
Introduction I recently did a blog post series. showing how to get started with OpenShift OKD on Fedora CoreOS for DigitalOcean. For that series I wrote a script to do most of the heavy lifting because DigitalOcean isn’t a native supported platform by the OpenShift installer.
Today I’ll show off how to get started in GCP, which is supported natively by the OpenShift installer. This makes it much easier to get started because most of the heavy lifting (including infrastructure bringup) is done by the installer itself.
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OpenShift OKD on Fedora CoreOS on DigitalOcean Part 4: Recorded Demo
Posted on September 28, 2020
| dustymabe
NOTE: The fourth post of this series is available here.
This blog post is the fifth in a series that illustrates how to set up an OpenShift OKD cluster on DigitalOcean.
Back on August 17th I highlighted this blog post series with a presentation and demo for the OKD working group’s Demo Marathon.
The video is posted on YouTube and also available below. If you’re interested take some time and watch the whole process work and see a cluster up and running at the end.
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OpenShift OKD on Fedora CoreOS on DigitalOcean Part 3: Upgrading
Posted on September 27, 2020
| dustymabe
Introduction NOTE: The third post of this series is available here.
This blog post is the fourth in a series that illustrates how to set up an OpenShift OKD cluster on DigitalOcean. The third post in the series covered further configuration of a cluster once it’s already up and running. At this point you should have a cluster up and running and configured with custom TLS certificates and user login’s outsourced to some other identity management service.
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OpenShift OKD on Fedora CoreOS on DigitalOcean Part 2: Configuration
Posted on August 23, 2020
| dustymabe
Introduction NOTE: The second post of this series is available here.
This blog post is the third in a series that illustrates how to set up an OpenShift OKD cluster on DigitalOcean. The second post in the series covered the automated deployment and teardown of a cluster using the digitalocean-okd-install script. At this point you should have a cluster up and running and ready to be further customized.
Set Up Custom TLS Certificates In the first post in this series we mentioned that you may want to have valid certificates for your cluster.
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