* refactor(ecstore): extract shared remote S3 client builder
Move the aws_sdk_s3 client construction out of bucket_target_sys into
bucket/remote_s3_client.rs: endpoint assembly, credential provider,
path-style selection, custom CA / skip-TLS transports and the outbound
SSRF gate now build from a neutral RemoteS3EndpointSpec so replication
targets and the upcoming on-demand migration source client share one
policy. Replication builds its client through From<&BucketTarget>; the
gate keeps its relaxed semantics (private allowed, loopback only behind
RUSTFS_REPLICATION_ALLOW_LOOPBACK_TARGET) verbatim. The builder also
gains optional connect/read timeouts and a User-Agent suffix
interceptor, both unset for replication.
Refs rustfs/backlog#2149
* feat(ecstore): add on-demand migration SourceClient
Add bucket/on_demand_migration/source_client.rs on top of the shared
remote S3 builder: HEAD, ranged streaming GET, ListObjectsV2 with
source-prefix mapping, GetObjectTagging and an admin probe. Every request
carries the x-rustfs-/x-minio-source-proxy-request anti-loop markers and
a RustFS-OnDemandMigration/<version> User-Agent suffix; SSE-C source
objects are rejected as unsupported. SourceError classifies SDK failures
(not found, access denied, throttled, timeout, connect, server error)
with retryability and a stable metrics label. Debug output redacts
credentials.
Refs rustfs/backlog#2149
* docs(operations): point outbound policy at shared remote S3 client builder
refactor(ecstore): huaweicloud/tencent reuse the shared S3 constructor
Migrates the Huaweicloud and Tencent tier warm backends onto the shared
S3-compatible constructor (backlog#2040). Also makes the shared
constructor's outbound-URL validation injectable per provider
(S3CompatibleWarmBackendParams::validate_endpoint) so it can centralize
rustfs/rustfs#6764's SSRF check for the providers that don't need an
exception, while accommodating rustfs/rustfs#6773's RustFS-specific
debug-only loopback opt-in without weakening the other six providers.
Updates scripts/error-other-format-baseline.txt: the one ::other(format!)
call site moves from the two per-provider files into the new shared
call site in warm_backend.rs (net call-site count unchanged).
Refs rustfs/backlog#2042
WarmBackendS3::new already rejects loopback, private, link-local, and
cloud metadata-service endpoints via validate_outbound_url, but the
Aliyun, Azure, Huaweicloud, Tencent, MinIO, R2, RustFS, and GCS warm
backend constructors built their transition clients directly from
conf.endpoint without the same check.
The endpoint comes from the AddTier admin API, gated only by
SetTierAction, which can be a narrower IAM grant than root. Any
principal holding it could point one of these eight tier types at an
internal address (loopback, RFC1918, link-local, or a cloud metadata
IP) and have the server issue authenticated outbound requests to it, a
server-side SSRF vector that the S3 and Wasabi tier types were already
closed against.
Apply the same validate_outbound_url check at construction time for
all eight providers, before any credentials or network client are
built, mirroring the existing WarmBackendS3 pattern. GCS keeps its
default-endpoint behavior when conf.endpoint is empty and only
validates an explicitly configured endpoint.
Add a regression test per provider asserting that a loopback endpoint
is rejected before any backend/network setup, matching the existing
WarmBackendS3 coverage.
Update the error(format!) ratchet baseline: these are one-shot admin
tier-configuration validation errors returned once per AddTier call,
not per-disk I/O errors that flow through reduce_errs quorum
aggregation (backlog#1845), so the new ::other(format!) call sites do
not introduce a quorum-bucketing hazard. They mirror the pre-existing,
already-baselined warm_backend_s3.rs call site.
The storage engine embedded a ~8.4K-line hand-written S3 HTTP client under crates/ecstore/src/client (rustfs/backlog#1842). That client is a legitimate engine capability — it consumes remote S3-compatible endpoints for ILM tier warm backends and transition targets — but it was misfiled inside the engine, dragging s3s/hyper wire types into ecstore and blocking ARCHITECTURE.md invariant 4.
This PR is the pure-move step: 21 modules move verbatim to the new crates/s3-client crate (rustfs-s3-client), and crates/ecstore/src/client/mod.rs becomes a re-export shim so every in-crate crate::client:: path keeps working. The two server-side modules that were historically misfiled under client/ — object_api_utils.rs and object_handlers_common.rs — stay in ecstore.
Three reverse dependencies from the client into engine internals are severed so the move can be pure:
- transition_api::ReaderImpl::ObjectBody held ecstore's GetObjectReader; the client only ever reads the body, so the variant now holds an ObjectReader newtype over Box<dyn AsyncRead + Send + Sync + Unpin> with the same read_all() surface. The single production construction site (set_disk transition upload) and the two engine-side consumers were adjusted.
- api_list/api_remove used ecstore's storage_api_contracts / object_api types; api_list now imports BucketInfo from rustfs-storage-api directly, and api_remove uses the client's own transition_api::ObjectInfo (only .name/.version_id were read; the error-path bucket name is now threaded as a parameter instead of read from the deleted objects).
- the api_put_object_streaming regression tests built a GetObjectReader by hand; they now wrap the duplex stream in ObjectReader::new.
Guard updates: the s3s footprint ratchet gains an ecstore-scoped counter (42 files, shrink-only, per rustfs/backlog#1842), the ecstore module-lint-blanket register follows the moved files into crates/s3-client so the blanket ratchet keeps covering them, the logging guardrail path pin follows transition_api.rs, and the ::other(format!) baseline is regenerated (moved call sites left ecstore).
Verification: cargo check -p rustfs-s3-client -p rustfs-ecstore; cargo nextest run -p rustfs-s3-client (43 passed) and -p rustfs-ecstore (4515/4523; the 8 failures reproduce identically on pristine origin/main on the same machine); cargo clippy --all-targets; scripts/check_layer_dependencies.sh, check_architecture_migration_rules.sh, check_s3s_footprint.sh, check_logging_guardrails.sh, check_error_other_format_ratchet.sh, check_doc_paths.sh, check_ci_paths_sync.sh all pass.
* feat(ecstore): type internode client-acquisition failures for stable quorum buckets
Backlog#1845 step 3, first typed family. The largest other(format!) message family in ecstore was 'can not get client, err: {detail}' (~50 production sites): every internode RPC that fails to acquire a client wrapped the dial/auth error with per-peer detail into DiskError::other / StorageError::other, whose Io equality compares the rendered message. N disks failing for this same cause therefore counted as N distinct errors in reduce_errs, starving quorum aggregation, and remote_disk call sites double-wrapped the message on top of get_client's own wrap.
Introduce DiskError::RemoteClientUnavailable(String) (wire code 0x2B) and its StorageError twin (StorageErrorCode 0x54): equality and hashing use the wire code alone, so same-cause failures land in one quorum bucket regardless of per-peer detail, while Display keeps the detail so substring classifiers (network needles, heal recoverability) keep reading it unchanged. Wire encoding carries the rendered detail in error_info and decode restores the typed variant; old peers fall back to the legacy string form gracefully.
Call sites: remote_disk get_client/get_bulk_client/offline-bypass/recovery-probe now construct the typed variant and the ~60 redundant double-wrap map_errs are gone; peer_rest_client's three client getters and offline gates, peer_s3_client, and admin_server_info follow. The tier-config-reload connection classifier's anchored 'can not get client' substring check becomes a typed match on the variant (the string form is retired and now classifies as Terminal, pinned by test).
Ref rustfs/backlog#1845
* chore(ci): refresh error other ratchet baseline
* fix(ecstore): classify typed client network failures
Backlog#1845 step 2. reduce_errs buckets per-disk errors by equality, and Io equality compares the rendered message, so an other(format!(..)) error embedding per-disk detail makes N same-cause failures count as N distinct errors during quorum aggregation. The census that opened the issue counted 1,609 such sites; the production count in crates/ecstore/src is 657 today and was still growing.
Freeze it: scripts/check_error_other_format_ratchet.sh counts ::other(format! sites per file (trailing #[cfg(test)] modules excluded) against a shrink-only per-file baseline, failing on any growth and on stale entries after a shrink, following the layer-dependency-baseline model. Wired into make pre-commit / pre-pr / dev-check and the CI Quick Checks job.
Ref rustfs/backlog#1845
