Files
milvus/docs/design-docs/design_docs/cdc/20260128-get_replicate_configuration.md
T
dd6a411e5e doc: add design docs directory (#49829)
issue: #49831

## What changed

Vendor Milvus design documents into this repository under
`docs/design-docs` as regular tracked files.

- Keep only the design document content and assets under
`docs/design-docs/design_docs/` and `docs/design-docs/assets/`.
- Remove standalone repository metadata from the vendored directory,
such as `README.md`, `CONTRIBUTING.md`, `MEP-TEMPLATE.md`, `COMMITTERS`,
`MAINTAINERS`, `OWNERS`, `OWNERS_ALIASES`, and `.gitignore`.
- Document the Milvus design document process in the main
`CONTRIBUTING.md`.
- Update Mergify and `tools/mgit.py` so feature PRs must provide an
in-repo design document path under `docs/design-docs/design_docs/`.

## Why

Milvus feature work should have an associated design document. Keeping
design docs directly in this repository makes them available from a
normal Milvus checkout and lets feature implementations include or link
the related design document in the same repository.

## Verification

- `git diff --check`
- `python3 -m unittest tools/test_mgit_design_doc.py`
- `python3 -m py_compile tools/mgit.py tools/test_mgit_design_doc.py`
- Parsed `.github/mergify.yml` with Python `yaml.safe_load`
- Confirmed `docs/design-docs` only contains `assets/` and
`design_docs/` at the top level

---------

Signed-off-by: xiaofanluan <xiaofan.luan@zilliz.com>
Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-15 18:56:24 +08:00

3.0 KiB

GetReplicateConfiguration API Design

Date: 2026-01-28

Overview

Add a new public API GetReplicateConfiguration that allows cluster administrators to view the current cross-cluster replication topology. The API returns configured replication relationships without exposing sensitive connection parameters like tokens.

Motivation

Operators need visibility into the current replication setup to:

  • Verify replication topology is configured correctly
  • Troubleshoot replication issues
  • Audit cluster configuration

Currently, UpdateReplicateConfiguration exists but there's no corresponding read API to inspect the current state.

API Definition

Add to milvus.proto on the MilvusService:

rpc GetReplicateConfiguration(GetReplicateConfigurationRequest)
    returns (GetReplicateConfigurationResponse) {}

message GetReplicateConfigurationRequest {
  option (common.privilege_ext_obj) = {
    object_type: Global
    object_privilege: PrivilegeGetReplicateConfiguration
    object_name_index: -1
  };
}

message GetReplicateConfigurationResponse {
  common.Status status = 1;
  common.ReplicateConfiguration configuration = 2;
}

Response Behavior

  • Returns the existing common.ReplicateConfiguration structure
  • ConnectionParam.token fields are cleared/redacted before returning
  • If no replication is configured, returns empty configuration with success status

Security

Authorization

  • Requires ClusterAdmin privilege
  • Unauthenticated or unauthorized requests return permission denied error

Data Sanitization

The implementation must sanitize sensitive fields before returning:

  • MilvusCluster.connection_param.token → empty string

Implementation Flow

Client SDK
    │
    ▼
Proxy (MilvusService)
    │  - Check ClusterAdmin permission
    │  - Forward to StreamingCoord
    ▼
StreamingCoord
    │  - Retrieve current ReplicateConfiguration
    │  - Sanitize: clear token fields
    │  - Return response
    ▼
Proxy
    │  - Return to client
    ▼
Client SDK

Files to Modify

Proto Changes (milvus-proto repo)

  • proto/milvus.proto - Add RPC definition and request/response messages

Proxy Layer

  • internal/proxy/impl.go - Add GetReplicateConfiguration method
  • internal/proxy/proxy.go - Wire up the new API

StreamingCoord Layer

  • internal/streamingcoord/server/service/ - Add handler to fetch and sanitize config

Permission

  • Register the API with ClusterAdmin privilege check

Tests

  • Unit tests for sanitization logic
  • Integration test for the full API flow

Alternatives Considered

1. Expose via StreamingCoordStateService only (internal)

Rejected: Requires direct access to internal services; not accessible via standard SDKs.

2. Return full configuration including tokens

Rejected: Security risk; tokens should not be readable via API.

3. Include health/status information

Deferred: Keeping initial implementation simple to match the Update API symmetry. Health info can be added later if needed.

Open Questions

None.