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SRE Team Update

· 2 min read
John Lotoski

High level summary​

The SRE team continues work on Cardano environment improvements and general maintenance.

Some notable recent changes, updates or improvements include:

  • Nixpkgs has been updated to 24.11 across all environments

  • Nix has been updated to 2.25.3 across all environments

  • TCP tuning was applied on one relay per pool group across all environments to minimize round-tripping across long distances.

  • This is the last SRE update for 2024. Hello 2025!

Repository Work​

Cardano-parts​

  • Nixpkgs has been updated to 24.11 and nix to 2.25.3. NixosModules and template just recipes with breaking changes from those updates were fixed. A nix jobs GHA CI test was added to verify environment spin up procedure. Template scripts were updated for compatibility with latest cardano-node protocol version and recent cardano-cli breaking changes. More details are available in the release notes: cardano-parts-release-v2024-12-19

Cardano-playground​

  • Nixpkgs has been updated to 24.11 and nix to 2.25.3 and all machines deployed along with breaking changes fixes. A fund-transfer recipe was added along with other miscellaneous improvements. More detail is available in the PR description: cardano-playground-pull-38

Cardano-mainnet​

  • Nixpkgs has been updated to 24.11 and nix to 2.25.3 and all machines deployed along with breaking changes fixes. Bootstrap scaling servers were disabled and block producer auto scheduled restarts were stopped. TCP transmission optimization for long distances was applied to one relay per pool group. More detail is available in the PR description: cardano-mainnet-pull-28

Iohk-nix​