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Fedora's Adoption of Cgroups V2 and Fedora Infrastructure Detective Work

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Red Hat
  • Fedora 31 Planning To Use Cgroups V2 By Default

    While the Linux kernel has shipped Cgroups V2 as stable since early 2016, on Fedora and most other Linux distributions it hasn't been enabled by default over the original control groups "Cgroups" implementation. But come Fedora 31 later this year, they are now planning to make it the default.

    Enabling Cgroups V2 by default will allow systemd and the various Linux container technologies along with libvirt and friends to make use of the new features and improvements over the original Cgroups like offering a unified hierarchy. The new implementation also provides better consistency, purpose-driven flexibility, and other design improvements over the original control groups. It's taken a while for CGroups V2 to become the default due to interface changes compared to V1 and all of the important containers/tooling needing to be adapted to make use of it.

  • Fedora Infrastructure Detective Work: Mirrorlist 503's

    The Fedora Project Mirrorlist system has evolved multiple times in the last 10 years. Originally written by Matt Domsch it underwent an update and rewrite by Adrian Reber, et al a couple of years ago. For many years Fedora used a server layout where the front end web servers would proxy the data over VPN to dedicated mirrorlist servers. While this made sense when systems were a bit slower compared to VPN latency, it had become more troublesome over the last couple of years.

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