Update redirect unit test to expect internal url (matching the
previous fix). Add missing state_file_path field to the integration
test VolumeServerState constructor.
Three operational improvements to match Go volume server behavior:
1. Options file (-options flag):
Load CLI options from a file, one per line (key=value format).
Supports comments (#), leading dashes stripped. CLI args override.
2. /metrics on admin port:
Serve Prometheus metrics on the main admin HTTP port in addition
to the separate metrics port, matching Go's behavior.
3. SIGHUP reload:
On SIGHUP, reload security config (whitelist from security.toml)
and scan disk locations for new volumes (LoadNewVolumes equivalent).
Guard wrapped in RwLock for runtime whitelist updates.
- Check for .note file (interrupted VolumeCopy) and remove partial volumes
- Validate EC shards before skipping .dat loading: check shard count,
uniform size, and expected size from .dat file
- Remove stale .cpd/.cpx compaction temp files on startup
- Skip already-loaded volumes on repeated load_existing_volumes calls
- Fix healthz test: set is_heartbeating=true in test state
- Range requests: clamp end to file size instead of returning 416 (matches Go)
- Suffix ranges larger than file size: clamp instead of skipping (matches Go)
- Set ETag response header on 201 Created write responses (matches Go SetEtag)
- Always decompress before image resize/crop even when client accepts gzip
- VolumeTierMoveDatFromRemote: don't check maintenance mode (Go doesn't)
- Fix stale integration test: stats routes are now exposed on admin router
- VolumeConfigure: don't fail on unmount of non-existent volume (Go returns nil)
- 304 responses include ETag/Last-Modified headers per HTTP spec
- Conditional header checks run before chunk manifest expansion
- EC encoder uses two-phase approach: 1GB large blocks then 1MB small blocks
- Compaction uses volume-level TTL (not per-needle TTL) for filtering
- VolumeConfigure does unmount/modify-disk/remount cycle matching Go
- VolumeMarkReadonly persists flag to .vif when persist=true
- AllocateVolume accepts version parameter
- Multipart boundary uses leading CRLF per RFC 2046
- MIME type override skipped for chunk manifests
- RedbNeedleMap: pure-Rust disk-backed needle map using redb, with NeedleMap
enum wrapping both in-memory and redb variants
- binary_search_by_append_at_ns: port of Go's BinarySearchByAppendAtNs for
VolumeIncrementalCopy with since_ns > 0
- Proxy/redirect: master volume lookup, HTTP proxy forwarding with ?proxied=true,
and 301 redirects for non-local volumes based on ReadMode config
- Wire new VolumeServerState fields: read_mode, master_url, self_url, http_client
- BatchDelete now supports EC volumes: looks up needle in .ecx index,
journals deletion to .ecj file (local-only, Go handles distributed part)
- JPEG EXIF orientation auto-fix on upload using kamadak-exif + image crate,
matching Go's FixJpgOrientation behavior (8 orientation transforms)
- Async batched write processing via mpsc queue (up to 128 entries per batch),
groups writes by volume ID and syncs once per volume per batch
- VolumeTierMoveDatToRemote: multipart upload .dat file to S3 with progress
streaming, updates .vif with remote file reference
- VolumeTierMoveDatFromRemote: downloads .dat from S3 with progress streaming,
removes remote file reference from .vif
- S3TierRegistry for managing named remote storage backends
- VolumeInfo (.vif) JSON persistence matching Go's protojson format
- 124 lib + 7 integration = 131 Rust tests pass
- All 109 Go integration tests pass (53 HTTP + 56 gRPC)
Chris Lu