R-355 (first, because it is the only one where data can be lost for good). paperless-ngx's
PostgreSQL was dumped into backups/primary/paperless/db-dumps/ — a directory for a stack that
does not exist, on the system drive — while the app's own unit recorded db_dumps: null. The
same misattribution reached writeSafetyDump, so a destructive restore of that app took NO undo
copy and the fail-closed refusal was never reached. Fixed by reading the compose project label,
which is the stack name by construction (compose runs with cmd.Dir set to the stack dir and no
-p). The old derivation stays as the fallback and an unresolvable attribution is now loud.
Catalogue sweep, proven able to convict: one affected app of 53. The fix is in the controller,
not the catalogue.
R-354. ReconstituteFromOffsite skipped every unit placement and the volume archives live inside
the unit, so the off-site restore had no volume leg at all — proven live with planted files:
calibre-web's 1,422,848-byte config archive was in the unit, the snapshot and the checking
folder, and the restore reported success without it. For the 40 of 53 apps that declare no data
drive that archive is the whole dataset. restoreDockerVolumesFrom is the local path's own replay
with an explicit directory: ONE implementation, two callers. Volumes replay before the database
and inside the stopped window. VolumesReplayed reaches the message.
The comment beside the skip was half false and is corrected; the half that still holds — the
live unit is the local path's source — is named, and scenario D fingerprints the whole live unit
across the operation.
Seven red-proofs, each asserted applied and reverted. Two found defects in the tests, not the
code: scenario D passed with the unit guard removed because the fingerprint had been narrowed
and was blind to the unit root.
gofmt -w across the controller tree (46 files) so gofmt -l is empty — disarms the
formatting landmine where a targeted edit + accidental gofmt -w swept ~46 unrelated
files. Pure formatting: whitespace + gofmt's optional-semicolon removal in reflowed
inline closures. One doc comment reworded ('' -> 'the empty string') to avoid gofmt's
Go-1.19 doc-comment typographic substitition ('' -> curly quote) muddying its meaning.
No build/vet/test behavior change.
Closes R-47. No new agent coupling — MinAgent stays 0.90.0.
The replay needs a running DB container, so both restore paths started the
WHOLE stack first, giving the application a window to rebuild the very schema
objects the dump was about to create. Measured live on 2026-07-19 (H4,
DIAG-immich-restore-round2): immich-server rebuilt clip_index two seconds
before the dump's CREATE INDEX, the replay aborted "already exists" under
ON_ERROR_STOP=1, and immich reported schema drift. The data survived only
because pg_dump emits COPY before CREATE INDEX.
Both paths now open a DB-ONLY window: only the stack's database service(s)
come up, the dump is replayed with the app still down, and the full start
runs only after the replay exits 0. Fail-closed: a dump with no identifiable
DB service refuses BEFORE the first mutation. Every exit from the window
still does a best-effort full start, so a failed restore never leaves a box
with a database and no application.
New: appbackup.DBServiceNames (yaml.v3 services-map parse — never a line
scan; immich's top-level volume keys are the decoy) sharing dbTypeForImage
with DiscoverDatabases; stacks.Manager.StartStackServices (refuses an empty
list — argument-less `up -d` is a full start); RedeployFromEnv split into
PersistUnitRedeployConfig + its unchanged tail. StackDataProvider's
RecreateStackFromUnit becomes RecreateStackDefinitionFromUnit — the hidden
`up -d` inside the old name is what carried the defect on the local path.
19 new tests (ordering plus state-at-replay-time, zero-mutation fail-closed
effects, replay-failure bring-up, parser decoys, empty-list refusal); three
companion red-proofs run and reverted. 23/23 packages green.
Not yet live-validated: STOP-1 supervised reconstitute, golden 0.153.0.
Closes the two findings from DIAG-immich-restore-2026-07-19. Viktor deleted 11
immich photos to test offsite restore; both runs flashed success and the photos
stayed gone. Two independent defects.
R-43 — no offsite path could restore a database. All three buttons were
file-only: the two "visszaállítás" actions staged to a scratch folder and never
touched postgres, and place-to-live merged only MISSING files. For a DB-indexed
app the bytes returned and the app still could not see them. The dump was
carried INTO every snapshot and could never be replayed OUT of one.
New ReconstituteFromOffsite (/backup/offbox/reconstitute): safety dump → stop →
files overwritten to the snapshot version → start → the snapshot's own dump
replayed → health wait. Two invariants:
- nothing is ever deleted (-a, no --ignore-existing, no --delete): a file
created after the snapshot survives as an extra;
- the undo exists before the act — the pre-restore- dump is verified ON DISK
before anything is stopped, overwritten or replayed; if it cannot be taken
the operation refuses with zero changes.
The replay reads the SCRATCH unit: the live unit is never overwritten, so
replaying from it would replay the current DB over itself and restore nothing.
R-44 — a manual push shipped an unrefreshed dump (up to ~24h old). That day's
predated the customer's account by four hours and probed to asset:0/user:0/
album:0 inside 52MB whose bulk was immich's shipped geodata. Every run, manual
AND nightly, now refreshes dumps + units BEFORE capturing. Order is the
mechanism: the gap can only ADD files the DB does not reference yet, never
remove one it does. Manifests carry offsite_run_id + dumps_at, so coherence is
verifiable at restore time rather than assumed; the periodic refresh carries a
prior stamp forward and never invents one.
Honesty surfaces, all warn-level and none a gate: unstamped (pre-v0.148) pairs
report their skew, ValidateDump gained an EXACT-match accounts-table sniff for
customer-empty dumps, the completion flash states an outcome instead of a
mechanism, and the missing-only button now says what it does NOT do.
11 tests; 5 red-proofs run and reverted. Two of those found real test weaknesses
rather than confirming strength — the first undo mutation was caught by a second
guard, and the first table-matching test did not discriminate between the two
matchers at all. Both tests were rewritten to the cases that separate them.
NOT in scope: R-41's catalog invariant check, nightly cadence, retention, quota
math, tier-2, and v0.147.x progress semantics beyond one added phase line.
Live acceptance (§9) has NOT run: no capability-map flip, customer-restore row
stays MISSING, R-3 stays DRAFT.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01P9Nn14TWGzKoqAJAiVwC2s
ListDumpFiles ran ValidateDump (line-by-line scan) for every dump on every ~5-min
RefreshCache cycle — wasted I/O+CPU on large customer dumps. ListDumpFiles now takes
an optional cached(name,size,mod) lookup; on a (size+modtime) match it reuses the
prior result and skips ValidateDump. settings.DBValidationCache gains Size+ModTime;
listAllDumpFiles builds the lookup from the persisted cache and writes back only fresh
validations (cache miss), so an unchanged dump triggers neither a re-validation nor a
settings.json write each cycle. nil cached = legacy validate-always (back-compat).
Tests: cache-hit skips validate (sentinel), cache-miss validates, nil validates.
deriveStackName pure-suffix-stripped on '-' (postgres/db/mariadb/.../cache), so a
stack whose slug ENDS in a role token (e.g. 'my-cache') was misattributed (stripped
to 'my') — filing its DB dump under the wrong/nonexistent stack. Now threads the set
of deployed stack names (m.knownStackNames() <- ListDeployedStacks) into
DiscoverDatabases and cross-references: candidate suffix-strip if known, else the
container name if it IS a known stack, else longest known stack that is a prefix
(handles <stack>_postgres / <stack>-1), else legacy strip. nil/empty known = legacy
behaviour (appexport passes nil). Table test incl. the my-cache case (fails pre-fix).
The restore paths (RestoreFromRecoveryUnit + the RestoreApp fallback) repopulated
Docker volume tars but NEVER replayed the captured <stack>-<dbtype>.sql dump, so
DB-resident data (e.g. rows in a DB whose data dir is a bind mount) did not come
back — the romm marker round-trip in the audit lost the row.
New appbackup.ImportDump (read-side counterpart to DumpOne) replays a .sql/.sql.gz
into the running DB using the live container's OWN discovered credentials (no env
threading; reuses DiscoveredDB + getMariaDBPassword). backup.reimportDBDumps
orchestrates it AFTER volume restore + stack bring-up, so the logical dump WINS
over any volume-tar copy of the DB (operator-chosen precedence). pg_dump
--clean --if-exists and mariadb-dump (default --add-drop-table) make replay
idempotent; psql ON_ERROR_STOP=1 surfaces real import errors.
Also: volume-restore per-volume failures and DB-import failures now SURFACE (the
restore returns an error) instead of a swallowed WARN, so a failed data restore
cannot read as success.
Tests (restore_db_test.go, injectable discover/import seams): imports when dump+DB
present, failure surfaces, no-dump skips discovery, dump-but-no-matching-DB is a
non-fatal skip. Live DB round-trip to be validated post-deploy.
Extract the stateless, keep-side app-data backup primitives out of
internal/backup/ into a new self-contained internal/appbackup/ package:
- dbdump.go: DB dump discovery/execution (DiscoverDatabases, DumpOne, ...)
- appdata.go: StackDataProvider + app-data/volume discovery, HumanizeBytes
- paths.go: keep-side path helpers (AppDBDumpPath, AppVolumeDumpPath, AppDataDir)
backup/ keeps every name available via type/const aliases + one-line function
forwarders (appbackup_bridge.go), so the still-present delete-side code
(restic, cross-drive, drive-mount) and the both-side consumers (web/api/report)
compile unchanged. The keep-only consumers appexport and storage are rewired to
import appbackup directly and no longer import backup.
This is the Part-2 prerequisite for the Proxmox port: appbackup has zero
references to restic/cross-drive/drive-mount and does not import backup, so the
delete-side can later be removed without breaking app-data backup or appexport.
Behaviour-preserving: pure move + import/qualifier rewrites, no logic edits.
The four Manager methods (RunDBDumps/DumpAppVolumes/DumpAppVolumesSafe share the
delete-side mutex/status state; RestoreAppFromTier2 reads the cross-drive mirror)
intentionally stay on Manager and delegate to appbackup — for the re-platform step.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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