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SRE Team Update

· 3 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-node 10.5.1 has now been promoted to a full release for mainnet use and has been deployed to all of IOE's node SRE testnet and mainnet clusters.

  • A new docker OCI tag of 10.5.1-docker is additionally available for any OCI image users who want to use the snapshot-converter binary from within the image. The snapshot converter can be found at path /usr/local/bin/snapshot-converter. New cardano-node OCI release images going forward will contain the snapshot converter to facilitate ledger backend state changes without having to rely on host level tooling or a fully ledger replay.

  • Cardano-parameters is a new repo which maintains the mainnet, preprod and preview protocol parameters with a daily update, as reported by the BlockFrost Cardano API service.

Repository Work -- Merged​

Cardano-mainnet​

  • Cardano-node release has been updated to 10.5.1. Rotates KES, cleans up 10.5.0 module code no longer needed and deploys select bootstraps with an EgressPollInterval modifier. cardano-mainnet-pr-37

Cardano-monitoring​

  • A modernization and security update PR which updates most flake pins, patches grafana for CVE vulnerabilities, updates the opentofu-registry and adds filtering for alpha/beta versions, updates tofu resource declarations and recipes, migrates to SSH over SSM, fixes some race conditions on reboot and more. See the PR header for details. cardano-monitoring-pr-2

Cardano-node​

  • For the purposes of a 10.5.1-docker OCI image tag, adds snapshot-converter to the nix overlay and bundles it into the cardano-node OCI image. Adds documentation with example command usage. cardano-node-compare

Cardano-parts​

  • Cardano-node pre-release has been updated to 10.5.1. A nix packaged version of cardano-signer has been added, blockperf and credential-manager tools updated. Nix jobs for facilitating governance activities have been improved, easing operations. cardano-parts-release-v2025-07-23

  • Cardano-node release has been updated to 10.5.1. cardano-parts-release-v2025-07-25

Cardano-playground​

  • Cardano-node pre-release has been updated to 10.5.1. Adds playground gov action support scripts, preview/preprod committee state changes and relevant gov action artifacts. Includes various improvements with cardano-parts release v2025-07-23. See the PR header for details. cardano-playground-pr-49

  • Cardano-node release has been updated to 10.5.1. Fixes a playground voting script to work with sops decrypt using bash array args; drops some deprecated code and updates cardano-book. cardano-playground-pr-50

Devx-ci​

  • Nix-darwin was updated to 25.05 requiring updating of the Darwin guest bootstrap scripts as well as the Buildkite modules. Deprecated Hetzner Darwin materialization for a legacy ssh problem was removed and Hydra impermanence config was updated. devx-ci-compare

Repository Work In Progress -- PRs and Branches​