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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:

  • Cardano parts, cardano-playground and cardano-mainnet clusters were updated to nixpkgs 25.05 with nix 2.29.1 and all machines deployed.

  • Cardano-airgap repo now has the ISO available for download via hydra CI server.

  • The cardano-node new tracing system related PRs currently listed in the "Repository Work In Progress" section are planned for merge prior to 10.6.0 tagging. This will make the binary artifacts, docker images and book config default to use of the new tracing system.

Repository Work -- Merged​

Adawallet​

  • An adawallet maintenance PR, bumping flake inputs, repackaging cardano-hw-cli from source, fixing cardano-cli and cardano-hw-cli breaking changes in the new versions, and adding various features and improvements. Details in the PR header. adawallet-pr-21

Cardano-airgap​

  • An airgap maintenance PR, updating nixpkgs, integrating adawallet, fixing misc version breaking change issues, adding the ISO image to hydra and other various features and improvements. Details in the PR header. cardano-airgap-pr-4

Cardano-parts​

  • Sets nixpkgs to 25.05, and nix to 2.29.1. NixosModules and just recipes with breaking changes from those updates were fixed along with other miscellaneous improvements detailed below in the PR/release header. cardano-parts-release-v2025-06-05

Cardano-mainnet​

  • Nixpkgs has been updated to 25.05 and nix to 2.29.1. NixosModules and just recipes with breaking changes from those updates were fixed. Includes various improvements with cardano-parts release v2025-06-05. cardano-mainnet-pr-35

Cardano-node​

  • Bumps iohkNix flake pin to adjust QueryBatchSize declared default from 100 to 100000 to match the Consensus UTXO HD Migration Guide. Adjusts corresponding config files to match iohkNix update and for related CI jobs to pass. cardano-node-pr-6235

Cardano-playground​

  • Nixpkgs has been updated to 25.05 and nix to 2.29.1. NixosModules and just recipes with breaking changes from those updates were fixed. Includes various improvements with cardano-parts release v2025-06-05. cardano-playground-pr-47

Iohk-nix​

  • Adjust the QueryBatchSize declared default from 100 to 100000 to match the Consensus UTXO HD Migration Guide. iohk-nix-pr-600

Repository Work In Progress -- PRs and Branches​