Phase D3. Managed databases can ship backup archives to a configured
S3-compatible destination (AWS S3, MinIO, Garage, …) while the local
copy remains intact.
- backup_targets table: owner-scoped endpoint/bucket/region/prefix +
encrypted access/secret keys (enc:v1:, never returned, has_credentials)
- create/update probe bucket access before storing; empty keys on update
keep stored credentials; delete refused (409) while referenced
- databases.backup_target_id assigns a target; external DBs rejected
- backup pipeline uploads via a holder container over docker cp streams;
remote failure keeps the local archive (logged), row gets remote:true
- restore prefers the local archive; on a missing local copy it downloads
the remote object into the backup volume first
- holder containers must be started before archive ops — docker cp does
not resolve volume mounts on never-started (Created) containers, and
removing the source mid-stream stalls the reader without EOF
- CLI: backup-targets list|add|update|remove|test + databases update
--backup-target; MCP: 5 new tools; Settings UI card + per-database
target picker + offsite badge on backups; OpenAPI + llms.txt + CLI.md
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Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
