[RELEASE] release-2.1.0 tasks

[climbfuji]

Release task list

Project board: #1835

Release timeline

• Feature freeze for deployment of release candidate: TBD
• Code freeze for deployment of release and final testing: TBD
• Release date: February 27, 2026

Tasks

• Create release branches release/x.y for spack, spack-packages, and spack-stack (update .gitmodules in spack-stack accordingly)
• Clear project board (no open pull requests other than for specific site configs or documentation)
• Prepare Wiki page for release (https://github.com/jcsda/spack-stack/wiki)
• Roll out release x.y.z from release branch release/x.y and update documentation (readthedocs), site config, and wiki page each time
  • Acorn (NOAA-EMC)
  • Atlantis (NRL)
  • Blueback (NRL)
  • Derecho (EPIC)
  • Discover (JCSDA)
  • Gaea (EPIC)
  • Hercules (EPIC)
  • Narwhal (NRL)
  • NAS (NASA)
  • Nautilus (NRL)
  • Orion (EPIC)
  • Ursa (EPIC)
  • JCSDA AWS Parallelcluster (JCSDA)
  • JCSDA AWS AMI (JCSDA)
  • JCSDA CI containers (JCSDA)
  • NAVY PW AWS (NRL)
  • NOAA PW AWS (EPIC)
  • NOAA PW Azure (EPIC)
  • NOAA PW Gcloud (EPIC)
• Tag repositories spack, spack-packages, and spack-stack ((update .gitmodules in spack-stack accordingly)
• Finalize Wiki page for release (https://github.com/jcsda/spack-stack/wiki)
• Prepare and publish release notes: https://github.com/JCSDA/spack-stack/releases
• As needed, merge pull requests into release branches back into develop / spack-stack-dev
• Close GitHub project