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feat(dict): make the build's dictionary version deploy-authoritative

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The dictionary lives on a persistent volume seeded from the image once and never
re-seeded, so a redeploy that bumped BACKEND_DICT_VERSION left the new DAWGs
unreachable (the volume mount shadows the image copy) and the active version stuck
at whatever the admin console last installed — a native offline-first client then
fetched the server's older pinned version over the network instead of using its
bundled dict.

On boot the backend now DELIVERS the build version onto the volume add-only, from a
second unshadowed image copy at BACKEND_DICT_SEED_DIR, into DICT_DIR/<version>/ when
absent (the flat seed and prior uploads untouched, so in-flight games keep theirs),
and InitActiveVersion makes the build version active — except a console-installed
version NEWER than the build (compared numerically) is not downgraded by a restart.
The .seed_version guard still protects the flat seed's label (a bump is a new
subdirectory, never a relabel). The console stays for out-of-band updates.

Docs: ARCHITECTURE.md §5, deploy/README.md, seedmarker.go. Tests: engine.DeliverVersion
(add-only, idempotent, flat-seed skip), compareDictVersions, and the dictionary-update
integration test's deploy-delivers path.
This commit is contained in:
Ilia Denisov
2026-07-15 00:21:20 +02:00
parent f8aeec8008
commit 48614e622d
13 changed files with 342 additions and 44 deletions
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backend/Dockerfile
+7 -2
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@@ -49,9 +49,14 @@ COPY --from=build /out/backend /usr/local/bin/backend
# Own the seed dictionary as the nonroot runtime user (UID 65532): a named volume
# mounted at /opt/dawg inherits this ownership on first use, so the admin console
# can write new version subdirectories at runtime. The volume preserves uploaded
# versions across deploys and, once seeded, is not re-seeded — so after bootstrap
# every dictionary change goes through the console, not a rebuild (ARCHITECTURE.md §5).
# versions across deploys and, once seeded, is not re-seeded (ARCHITECTURE.md §5).
COPY --from=dawg --chown=65532:65532 /dawg /opt/dawg
# A second, UNSHADOWED copy of the build's DAWGs: the /opt/dawg volume mount hides the
# image's copy there, so this is where engine.DeliverVersion reads the build version from
# to add it (add-only) to the volume on boot — the deploy-delivers path that lets a bumped
# BACKEND_DICT_VERSION go live for new games without an admin upload (ARCHITECTURE.md §5).
COPY --from=dawg --chown=65532:65532 /dawg /opt/dawg-seed
ENV BACKEND_DICT_DIR=/opt/dawg
ENV BACKEND_DICT_SEED_DIR=/opt/dawg-seed
ENV BACKEND_DICT_VERSION=${DICT_VERSION}
ENTRYPOINT ["/usr/local/bin/backend"]