Release v0.21.0

[elitegreg]

Changelog

Testnet checklist

Preparation

• 1. Deploy all components to devnet (daily release with QA) — schedule in advance, takes time (trigger)
• 2. PR: bump version in Cargo.toml, Cargo.lock, CHANGELOG.md → merge to main (CHANGELOG)
• 3. Update pinned versions in infra repo (example PR)

Release & deploy

• 4. Push tags for all components (except client) to trigger GH releases → wait for releases to be published (trigger)
• 5. Deploy serviceability, telemetry, and geolocation Solana programs to configure version onchain (instructions)
• 6. Verify latest release in CloudSmith (link)
• 7. Deploy all components to testnet including client (send-it mode) — check system metrics dashboard (trigger)
• 8. Deploy clients and onchain data collectors (trigger)

QA & announcement

• 9. QA connect/disconnect workflows via unicast and multicast with traffic on client nodes (trigger)
• 10. Post community announcement on Slack/Discord — executed by foundation (templates)
• Monitor dashboards for ~30 min post-deploy watching for anomalies

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Mainnet-beta checklist

Passport & programs

• 1. Pause passport program and sentinel
• 2. Upgrade passport program
• 3. Resume passport program and sentinel
• 4. Deploy Solana programs onchain: telemetry first, then serviceability and geolocation to configure version onchain

Packages & infra

• 5. Promote component packages from CloudSmith doublezero-testnet → doublezero (trigger)
• 6. Update pinned versions in ansible (example PR)
• 7. Deploy components (send-it mode) (trigger)
• 8. Promote client packages from CloudSmith doublezero-testnet → doublezero (trigger)
• 9. Execute doublezero init
• 10. Deploy clients (send-it mode) (trigger)

QA & validation

• 11. Run QA workflow (trigger)
• 12. Check dashboards for anomalies
• 13. Verify recommended version in docs