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· 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:

  • A cardano-node 10.5.4 release and 10.6.2 pre-release version are quite close. SRE has been iterating on candidate deployments for these versions to our infrastructure and offering feedback to relevant development teams where appropriate.

Repository Work -- Merged​

Cardano-airgap​

cardano-airgap PR#12:

  • Bumps disko to v1.13.0
  • Fixes running disko scripts in the iso environment after bumping nixpkgs by adding required deps via closure path reference to /etc/install-closure.
  • Adds binary iso-versioning, available from devShell and in the iso environment which provides relevant component version info in centered GitHub md table format.

Cardano-faucet​

cardano-faucet PR#17:

  • Updates the flake inputs and haskell dependencies of cardano-faucet. Specifically, upgrade cardano-api to 10.19 for cardano-node 10.6.x compatibility, and fix the resulting compiler errors. This prepares the faucet for functioning through the upcoming intra-era hard fork.

Iohk-nix​

cardano-node-release/10.5.4 branch:

  • Provides a preview environment checkpoint file as well as per-environment peer snapshot file and "use ledger peers after" slot updates for cardano-node release 10.5.4.

Repository Work In Progress -- PRs and Branches​

· One 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:

  • The IOG private mainnet pools were retired this week. The IOG1 public stakepool remains active and forging.

  • An internal Dijkstra network was spun up for testing of the upcoming intra-era hard fork, followed by Dijkstra hark fork testing.

Repository Work -- Merged​

Cardano-airgap​

cardano-airgap PR#11:

  • Updates to nixpkgs 25.11
  • Updates adawallet with a nixpkgs also at 25.11 and fixed docopts
  • Bumps capkgs and corresponding bech32 package

Cardano-node​

cardano-node PR#6401:

  • Bumps iohkNix flake input and adjusts configuration files for new tracing system parameter changes.

Cardano-parts​

cardano-parts PR#78:

  • Adds CI tests for process-compose validation of node and db-sync stacks on the public networks.

Devx-ci​

devx-ci PR#140:

  • Provides improvements to hydra-tools, including support for multiple GitHub organizations and GitHub app installations.

Repository Work In Progress -- PRs and Branches​

· One min read
John Lotoski

High level summary​

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

Much of the SRE team is on vacation during this biweekly update.

Happy holidays to all of the Cardano community!

Repository Work -- Merged​

Capkgs​

capkgs Range:

  • Updates the content address package repository CI job to use a netrc token for handling GitHub API rate limits. URL redirection handling is also added.

Devx-ci​

devx-ci PR#139:

  • Add extra x86_64-linux build farm machines ci11, ci12 to the build cluster and re-key secrets

Repository Work In Progress -- PRs and Branches​

· 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:

  • Starting with the next node release version 10.6.2, release binaries and OCI images will be generated for arm64 architectures.

Repository Work -- Merged​

Acropolis​

acropolis PR#482:

  • Removes unused packages to free up disk space for running CI tests

acropolis PR#483:

  • Schedules a run of the omnibus bootstrap process every morning at 00:15
  • Fail the job if the process does not complete within 3 hours

Cardano-node​

cardano-node PR#6376:

  • This PR improves support for multiple arches in the following ways:

    1) Adds aarch64-linux nix packages, including musl static and OCI tarball generation package variants;

    2) Bumps GHC from 9.6.6 -> 9.6.7 as well as the cardano-automation flake input for aarch64-linux support;

    3) Updates the release-ghcr GHA workflow to produce linux multi-arch manifest OCI and corresponding release images which auto-resolve on container pull to the appropriate arch (amd64 or arm64);

    4) Updates the release-upload GHA workflow to produce new linux and darwin aarch64 artifacts. Produces new OCI/goarch standard name aligned default OCI images.

    More details available in the PR description.

cardano-node PR#6391:

  • Adds db-analyser, db-synthesizer, and db-truncater to the Cardano Node container image.

Devx-ci​

devx-ci PR#136:

  • Updates hydra version from 2.28 -> 2.32 + issue patch and explicitly allows IFD
  • Applies nix version 2.32-maintenance to hydra and linux builders
  • Adds ssh stabilization params to the hydra module for connection to remote builders
  • Disables nixos optimise on hydra to avoid GC performance degradation
  • Removes the r2 wireguard tunnel from the remote builders as it is not currently required

Repository Work In Progress -- PRs and Branches​

· 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:

  • Within approximately 1 day of the preview network partition occurring, mentioned in the last biweekly SRE update, mainnet experienced a similar partition. Again, after an intense multi-team and community collaborative effort which the SRE team was participating in from the beginning, a new cardano-node version 10.5.3 was released to fix the issue, with all network participants on problematic versions encouraged to upgrade immediately so that the partition would resolve itself as the majority of stake aligned under node versions with proper ledger hash handling. Indeed, with the quick reaction of the community as a whole, the network partition resolved within approximately 14 hours. Various after action reports are available detailing the event, such as Pi Lanningham's Poison Piggy - After Action Report

  • Subsequent to the mainnet fork event above, 10.6.1 has also been pre-released and deployed to IOE pre-release infrastructure. The SRE team has also been participating in other after action investigation activity.

Repository Work -- Merged​

Cardano-mainnet​

  • Bumps and deploys cardano-node release to 10.5.3

  • Fixed Mithril scripts due to Mithril aggregator upstream API breaking changes

  • Updates the save-ssh-config recipe to match opentofu ssh config artifact output

  • Cleaned up flake.nix inputs and some colmena modules code

  • Modifies two bootstrap EBS gp3 volumes to accommodate some data handling work

    cardano-mainnet-pr-40

Cardano-parts​

  • Bumps cardano-node release to 10.5.3, pre-release to 10.6.1, and cardano-db-sync pre-release to 13.6.0.6

  • Mithril script code for node entrypoint, systemd ExecPre and process-compose jobs were fixed to accommodate breaking upstream API changes

  • The pkgs.nix flakeModule was re-factored to make switching between localFlake and capkgs pins easier

    cardano-parts-release-v2025-12-04

Cardano-playground​

  • Bumps and deploys cardano-node release to 10.5.3, pre-release to 10.6.1, and cardano-db-sync pre-release to 13.6.0.6

  • Updates the cardano-book for the corresponding cardano-node release and pre-release updates

  • Adds a metrics scraper nixosModule for perf team custom data analysis

  • Fixed Mithril scripts due to Mithril aggregator upstream API breaking changes (via cardano-parts pin update)

  • Updates the save-ssh-config recipe to match opentofu ssh config artifact output

  • Cleaned up flake.nix inputs and some colmena modules code

    cardano-playground-pr-52

Repository Work In Progress -- PRs and Branches​