Flatcar Container Linux

This page summarizes the projects mentioned and recommended in the original post on news.ycombinator.com

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  • Flatcar

    Flatcar project repository for issue tracking, project documentation, etc.

    I guess if you found my comment to be "comically hyperbolic" then replying to mine with a "comically reductionist" is fair game

    So, anyway, I actually did dig up a concrete example of my experience with it, and I cannot link to the "Additional information" section but that is both why I think the thing was a mess and also why the Miroservices YT joke resonated: https://github.com/flatcar/Flatcar/issues/220

    I think the CoreOS boot strategy was decomposed into a bunch of different executables, each responsible for doing their own little slice of the world. Maybe it drew inspiration from systemd in that way. But, just like my real life experience with microservices, it requires keeping a bunch of different projects and their upgrade paths in ones head, knowing their disparate config formats, and when one of them inevitably has a bug, understanding how to troubleshoot what went wrong with the system as a whole

    And, again in trying to be reasonable in this discussion[1] I do also understand why one would opt for the data URI, given how much of the rest of Ignition loads content from URLs. I don't believe cloud-init has that remote content paradigm baked into in nearly the same way, so I hear you about that.

    And yes, my belief is that JSON is a data-exchange format from _computer to computer_ and making people write them is a poor DX choice, IN MY OPINION. And, to reiterate, I know that CoreOS's perspective is that it is a computer-to-computer transmission from the transpiler-project-o-the-day to the Ignition binary, but that is predicated on one having access to that transpiler binary in all cases, which is quite different from the problem that cloud-init is trying to solve

    fn-1: I'm sorry you got hurt by my "tire fire" outburst, and that evidently derailed this whole interaction, but it was my experience

  • SaaSHub

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  • nebraska

    Update monitor & manager for applications using the Omaha protocol, optimized for Flatcar Container Linux.

    The update server supports the Omaha protocol, is called Nebraska and is available here under an Apache license: https://github.com/kinvolk/nebraska

    Our team hosts the public server, but any Flatcar user can run Nebraska themselves and point their nodes to that.

  • Flatcar

    Discontinued Flatcar project repository for issue tracking, project documentation, etc. [Moved to: https://github.com/flatcar/Flatcar] (by flatcar-linux)

    This might help you: https://github.com/flatcar-linux/Flatcar/issues/502

  • RPi4

    Raspberry Pi 4 UEFI Firmware Images

    The rpi4 has uefi firmware available, this allows you to boot any generic uefi aarch64 image, you no longer need rpi specific images.

    https://github.com/pftf/RPi4

  • fedora-coreos-tracker

    Issue tracker for Fedora CoreOS

  • ostree

    Operating system and container binary deployment and upgrades

    A couple of small things, but primarily I don’t think it actually embraced immutability in the same way. CoreOS container Linux used A/B partitions for updating truly immutably. Partition B didn’t boot? Just boot A again.

    Fedora CoreOS and RHEL CoreOS use OSTree [1], no shade on OSTree, it works well, but I slept better with A/B partitions, I just find them easier to reason about.

    [1] https://github.com/ostreedev/ostree

  • ublue

    A familiar(ish) Ubuntu desktop for Fedora Silverblue.

    How does this compare to https://ublue.it/

  • docs

    Discontinued Documentation for CoreOS projects (by coreos)

    ublue is based off of fedora and rpm-ostree, which is what "CoreOS" is today.

    What happened was old school CoreOS was A/B partition based: https://github.com/coreos/docs/blob/master/os/sdk-disk-parti...

    My memory is hazy but here's how I remember it: After Red Hat acquired CoreOS they rebased the entire thing around rpm-ostree, which is the CoreOS people know today: https://coreos.github.io/rpm-ostree/

    At the time there was some anxiety in the community as to what would happen, as there was no direct upgrade path from old CoreOS to new CoreOS. Theoretically if we all believed the kool-aid we were drinking it's just a redeploy, no pets!

    Kinvolk came along, forked it, and made Flatcar Linux, which kept the A/B partitioning system, and more crucially, let you just change a config file and all your old CoreOS nodes would just move to Flatcar and then you were good to go. So now if you wanted to stay on the system you were comfortable with you could just use Flatcar. If the composability of rpm-ostree attracted you then new CoreOS have you covered. Red Hat deserves a hat tip here because in their documentation/blog they explicitly mentioned Flatcar as an option for people who wanted to stick with what they know, which I thought was cool and how I discovered it!

    Later on Microsoft acquired Kinvolk and and then people raised eyebrows. I have not checked in a while but the folks involved continued to do their thing and run it like a good OSS project, hold public meetings, all that stuff.

    I use both and they're both high quality.

  • rpm-ostree

    ⚛📦 Hybrid image/package system with atomic upgrades and package layering

    ublue is based off of fedora and rpm-ostree, which is what "CoreOS" is today.

    What happened was old school CoreOS was A/B partition based: https://github.com/coreos/docs/blob/master/os/sdk-disk-parti...

    My memory is hazy but here's how I remember it: After Red Hat acquired CoreOS they rebased the entire thing around rpm-ostree, which is the CoreOS people know today: https://coreos.github.io/rpm-ostree/

    At the time there was some anxiety in the community as to what would happen, as there was no direct upgrade path from old CoreOS to new CoreOS. Theoretically if we all believed the kool-aid we were drinking it's just a redeploy, no pets!

    Kinvolk came along, forked it, and made Flatcar Linux, which kept the A/B partitioning system, and more crucially, let you just change a config file and all your old CoreOS nodes would just move to Flatcar and then you were good to go. So now if you wanted to stay on the system you were comfortable with you could just use Flatcar. If the composability of rpm-ostree attracted you then new CoreOS have you covered. Red Hat deserves a hat tip here because in their documentation/blog they explicitly mentioned Flatcar as an option for people who wanted to stick with what they know, which I thought was cool and how I discovered it!

    Later on Microsoft acquired Kinvolk and and then people raised eyebrows. I have not checked in a while but the folks involved continued to do their thing and run it like a good OSS project, hold public meetings, all that stuff.

    I use both and they're both high quality.

  • coreroller

    CoreRoller is a set of tools to control and monitor the rollout of your updates.

  • toc

    ⚖️ The CNCF Technical Oversight Committee (TOC) is the technical governing body of the CNCF Foundation.

    The most significant change this acquisition brought to Flatcar was to turn it from a vendor-driven open source project to a community-driven one. Also see Kinvolk's statement at the time: https://kinvolk.io/blog/2021/04/microsoft-acquires-kinvolk/

    Since then, the project has opened up and has become fully community driven - releases, features, stewardship, everything. To further underline independent stewardship, Flatcar was recently proposed to join the CNCF as an incubating project: https://github.com/cncf/toc/pull/991 .

  • flatcar-website

    Thanks for the feedback :) Apparently there's always room to improve our docs. A maintainer has taken a stab on that (see https://github.com/flatcar/flatcar-website/pull/263 for progress) and we'll update our docs shortly.

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