PHASE 1 — HOST KEY STATICALLY PINNED. ssh-keyscan -p 23 returned an
ED25519 key whose fingerprint EQUALS the out-of-band value
SHA256:XqONwb1S0zuj5A1CDxpOSuD2hnAArV1A3wKY7Z3sdgM, so it is safe to pin.
scripts/storagebox_known_hosts now carries that verified line and ships to
the container (Dockerfile already COPYs scripts/). backup-db.sh uses
StrictHostKeyChecking=yes + UserKnownHostsFile=<pin> instead of
accept-new, which was trust-on-first-use and would have accepted an
impostor on the very first run. A missing pin file REFUSES the push rather
than silently falling back. Never weakened to accept-new/=no//dev/null —
a test asserts that on executable lines.
PHASE 1b — REMOTE DIR GUARANTEED. The box has only .ssh/, and rsyncing a
file into a missing parent either fails or silently writes the dump AS the
directory name — one file, overwritten nightly, reading as "backups exist"
while retaining exactly one. Uses rsync --mkpath when available, else an
explicit remote mkdir -p ahead of the push.
PHASE 2b — FAILED OFF-BOX PUSH IS NOW LOUD. Off-box is required, so the
failed-push path pages at "urgent" (was "low"/deferred) and the script
emits a machine-readable OFFBOX_OK=1/0/deferred that
POST /api/internal/backup/run surfaces as a distinct offbox_ok field.
Exit code deliberately still reflects ON-BOX durability — a good on-box
dump must not raise a false total-failure alarm. Surfacing the truth, not
manufacturing a failure.
No key material is echoed anywhere; only the PUBLIC host key is committed.
Suite 280/3338 green, build exit 0.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SmNjJAwEnqHPtXbvSZR8kA
