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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-node and cardano-cli release versions are now set to 10.4.1 and 10.8.0.0, respectively, in cardano-parts release v2025-05-22.

  • The upcoming node 10.5 [pre-]release is being configured to use genesis mode by default on preview and preprod environments.

  • SRE is collaborating with IT Sec team to further harden our infra and clusters.

Repository Work -- Merged​

Cardano-parts​

  • Sets node release to 10.4.1, cardano-cli release to 10.8.0.0 and mithril to v2517.1. Adds mithril ancillary key support for signed volatile and ledger state. Switches to a blockPerf fork which can be used without publishing metrics to CF, ex: for testnet usage. Includes additional misc fixes and improvements described in the PR/release header. cardano-parts-release-v2025-05-22

Cardano-mainnet​

  • Sets node release to 10.4.1, cardano-cli release to 10.8.0.0 and mithril release v2517.1. Includes various improvements with cardano-parts release v2025-05-22. Deploys all machines to 10.4.1. cardano-mainnet-pr-34

Cardano-node​

  • Bumps iohkNix for 10.5 network param changes, preview/preprod default GenesisMode consensus config, per env useLedgerAfter and peer-snapshot updates. Updates CI for the iohkNix config changes. In the cardano-node nixos service, sets preview and preprod environments to use peer-snapshots. Enables genesis mode to work OOTB for preview/preprod on: docker images, binary artifacts, nixos built machines. cardano-node-pr-6225

Cardano-playground​

  • Sets node release to 10.4.1, cardano-cli release to 10.8.0.0 and mithril release v2517.1. Deploys blockPerf to all testnet machines without publishing metrics to CF. Includes various improvements with cardano-parts release v2025-05-22. Deploys all machines to 10.4.1. cardano-playground-pr-46

Iohk-nix​

  • Adds mithril network ancillary verification keys: the ancillary verification keys are a breaking change required to pull ancillary mithril state (ie: ledger and volatile state) in addition to immutable state. In earlier mithril releases, the ancillary state was bundled together with the immutable state. iohk-nix-pr-598

  • Node 10.5 updates: set GenesisMode for ConsensusMode as default on preview and preprod; tunes TargetNumberOfEstablishedPeers, and SyncTargetNumberOfEstablishedBigLedgerPeers per network team request; updates peer-snapshots per environment; updates useLedgerAfterSlot per environment. iohk-nix-pr-599

Repository Work In Progress -- PRs and Branches​