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Henry Guo
81 lines
3.1 KiB
Markdown
81 lines
3.1 KiB
Markdown
# RustFS Architecture Evolution
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This document set tracks the architecture migration from
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[`rustfs/backlog#660`](https://github.com/rustfs/backlog/issues/660).
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## Baseline
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- Baseline branch: `upstream/main`
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- Baseline commit: `61f0dfbc40f748be313be84d834d8259cf3e19c9`
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- Baseline title: `fix(ecstore): invalidate wiped disk id cache (#3251)`
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- First migration PR type: `docs-only`
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## Core Principle
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Cut wrong dependency directions with directories and contracts first, migrate global
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state in small steps next, and split crates only after boundaries are stable. Storage
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hot-path behavior must not drift during this migration.
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## Architecture Documents
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- [`runtime-lifecycle.md`](runtime-lifecycle.md): runtime, AppContext,
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startup/readiness, and shutdown contracts.
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- [`s3-tables-support-matrix.md`](s3-tables-support-matrix.md): supported,
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preview, reference-only, and not-claimed S3 Tables and Iceberg REST Catalog
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surfaces.
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- [`storage-control-data-plane.md`](storage-control-data-plane.md): boundaries
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between StorageCore, ECStore, ClusterControlPlane, and BackgroundControllers.
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- [`background-services-inventory.md`](background-services-inventory.md): current
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scanner, heal, lifecycle, replication, config reload, metrics, and shutdown
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surface before BackgroundController work.
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- [`background-controller-contract.md`](background-controller-contract.md):
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desired/current/status/reconcile vocabulary and lifecycle boundaries for
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future read-only BackgroundController work.
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- [`crate-boundaries.md`](crate-boundaries.md): PR types, crate direction,
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compatibility rules, and migration guardrails.
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- [`ecstore-config-consumer-inventory.md`](ecstore-config-consumer-inventory.md):
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current `ecstore::config::{Config, KV, KVS}` definitions, consumers,
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migration risks, and do-not-change contract.
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- [`config-model-boundary-adr.md`](config-model-boundary-adr.md): target crate,
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module path, dependency rules, and verification gates for moving the pure
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server-config model.
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- [`migration-progress.md`](migration-progress.md): current task state and context
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handoff.
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- [`compat-cleanup-register.md`](compat-cleanup-register.md): temporary
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compatibility code that must be removed later.
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## Phase Order
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```mermaid
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flowchart LR
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G["Phase 0: Baseline and guardrails"]
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CFG["Phase 1a: Config model contract"]
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SEC["Phase 1: Security governance"]
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API["Phase 2: Storage API contracts"]
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RT["Phase 3: Runtime and lifecycle"]
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EC["Phase 4: ECStore internal layout"]
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CP["Phase 5: Cluster control plane"]
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EXT["Phase 6: Extension plane"]
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GS["Phase 7: Global-state reduction"]
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CR["Crate split evaluation"]
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G --> CFG
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G --> SEC
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G --> API
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G --> RT
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CFG --> EXT
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API --> EC
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RT --> GS
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EC --> CP
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EXT --> CR
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GS --> CR
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```
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The first implementation sequence is conservative:
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1. Record baseline and migration context.
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2. Establish PR and compatibility rules.
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3. Add dependency and loss-prevention checks in a separate `ci-gate` PR.
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4. Inventory `ecstore::config::{Config, KV, KVS}` before moving any code.
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5. Decide the config model boundary before extracting or migrating consumers.
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