Rucio Meeting

Thursday 26 Mar 2026, 15:00 → 16:00 Europe/Zurich

Dimitrios Christidis (CERN)

15:00 → 15:05 News

• Rucio 40 code freeze is in effect
• April meeting schedule
  • Apr-02
  • Apr-09 Rucio 41 "Donkémon" release planning
  • Apr-16 Rucio 41 "Donkémon" release planning
  • Apr-23 Rucio 40 Release retrospective
  • Apr-30
• The Highcharts library will be removed from the old Web UI (#8462)
  • Some functionality will be lost
  • The aim is to migrate to the new Web UI as soon as possible

15:05 → 15:25 Community News & DevOps roundtable

• ATLAS
• CMS
  • Rucio server overload
    • All server pods crashed → one hour downtime
    • Evidence that they ran out of memory
      • Need to understand why
  • Slow Cleaner performance
    • Large rules? Replicating rules? General database degradation?
  • Database issue
    • DBAs reported a query run frequently that is taking a long time and resources
    • Ongoing.
  • New Web UI: is the rule approval workflow implemented?
    • Mayank: No, but high in the prorities.
• ESCAPE
• Fermilab
• CTAO
  • Looking to enable the Receiver daemon
    • How to deal with the message broker?
    • The subscription to the topic looks to have no VO-specific filter
    • Support ticket submitted to FTS
• MADDEN
  • Issue enabling a particular policy
  • Enabling OIDC for daemons
    • Documentation may be inadequate
    • To follow up in #Support
• IHEP
• INFN Datalake
  • Q: Mechanisms in place to automatically register DIDs/replicas as soon as they are created on the storage (of the RSEs)?
    • At CERN there’s some EOS-specific implementation

15:25 → 15:55 Developers roundtable

• Reflection about ongoing Sprint 1 (Sprint Board) [Maggie]
  • Business as usual
• PR review sprint
  • 40 → 39
• Rucio 40 priority followup
  • Todo
    • Create a new API endpoint for the clients to request tokens #6638 [Dimitrios]
    • Implement new token authentication for download #7029 [Dimitrios]
    • Prevent multiple Reaper threads from working on the same replicas #6512 [Hugo]
  • In Progress
    • Consider using Python venvs in containers to avoid conflicts with system-installed packages #458 [Ben]
    • More useful client docstrings and CLI help messages (Target: 15/25) #363 [Dimitris]
    • Token refresh after expiration #73 [Giovanni]
    • Do not use regex to split did, use scope extraction method #7519 [James]
    • Test stability on LTS branches #7964 child of #7667 [Karan]
    • Copy implimentation of CLI to new CLI structure #8295 child of #7960 [Maggie]f
    • [EPIC] UX improvements (Target 22) #621 [Mayank]
  • In Review
    • Wrong documentation for dids/scope/name/files call #8053[Dimitris]
    • Add FTS-production based tags for rucio/test-fts (for LTS pinning) #494 child of #493 [Karan]
    • LTS: Add service-versioned tagging for test-xrootd containers #496 child of #493 [Karan]
    • No way to check or change ownership of a scope using Rucio client #7830 [Maggie]
    • Generate "Configuration parameters" documentation page automatically, to avoid mismatches between documentation and code #325 [Maggie]
    • Change mixed prometheus_client and probe_metric approachs to use PrometheusPusher #129 [Maggie]
    • [ EPIC ] : Mutation Operations and Role Based Access to pages/features (Target 5) #622 [Mayank]
    • Pin test helper container images for LTS dev environment (release-38-LTS) #8419 child of #7964 [Karan]
  • Done
    • Migrate from Jobber to simple Cron #152 [Eric]
    • DIDs not being shown correctly in the extension after a successful download #95 [Giovanni]
    • Make available + Add to Notebook features failing #83 [Giovanni]
    • Listing containers with more than 10k entries breaks the kernel #102 [Giovanni]
    • Vulnerabilities fix and versioning harmonisation #131 [Giovanni]
    • Remove hard-coded one-day lifetime in DIRAC API #8172 [Max]
    • Rucio silently skips importing configured policy package in case of errors #7962 [Max, James]
    • Possible Belle II specific code in DIRAC functionality #7824[Max]
    • Remove development dependencies from webui container #488[Mayank]
  • Delayed
    • Add startup self-check mechanism to block Rucio services when critical diagnostics fail #8197 child of #8011 [Dimitris]
    • Database: Refactor Alembic migrations to become uniform and honour the configured schema #8145 child of #7737 [Dimitris]
    • Database: Make Rucio's Alembic history repeatable, schema-correct, and easy to validate/debug #7737 child of #7667[Dimitris]
    • Stop auto-forwarding of old-style CLI commands #8294 [Maggie]
    • Simplify what we run on CI (test suites, OS, Python versions, DB, …) #7965 child of #7667 [Mayank, Karan]
• Other discussion
  • • Potential freeze exception for the Receiver option?
    • OIDC authentication and multi-RI instances
      • To submit an issue on GitHub

15:55 → 16:00 AOB