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Code Block
service MilvusService {
  // (omit api version prefix)
  // POST /collections
  rpc CreateCollection(CreateCollectionRequest) returns (common.Status) {}
  // DELETE /collections/:collectionName
  rpc DropCollection(DropCollectionRequest) returns (common.Status) {}
  // GET /collections/:collectionName
  rpc HasCollection(HasCollectionRequest) returns (BoolResponse) {}
  // PUT /collections/:collectionName/load
  rpc LoadCollection(LoadCollectionRequest) returns (common.Status) {}
  // DELETE /collections/:collectionName/load
  rpc ReleaseCollection(ReleaseCollectionRequest) returns (common.Status) {}
  // GET /collections/:collectionName/schema
  rpc DescribeCollection(DescribeCollectionRequest) returns (DescribeCollectionResponse) {}
  // GET /collections/:collectionName/statistics
  rpc GetCollectionStatistics(GetCollectionStatisticsRequest) returns (GetCollectionStatisticsResponse) {}
  // GET /collections-list
  rpc ShowCollections(ShowCollectionsRequest) returns (ShowCollectionsResponse) {}

  // POST /collections/:collection/partitions
  rpc CreatePartition(CreatePartitionRequest) returns (common.Status) {}
  // DELETE /collections/:collection/partitions/:partition
  rpc DropPartition(DropPartitionRequest) returns (common.Status) {}
  // GET /collections/:collection/partitions/:partition
  rpc HasPartition(HasPartitionRequest) returns (BoolResponse) {}
  // PUT /collections/:collection/partitions/:partition/load
  rpc LoadPartitions(LoadPartitionsRequest) returns (common.Status) {}
  // DELETE /collections/:collection/partitions/:partition/load
  rpc ReleasePartitions(ReleasePartitionsRequest) returns (common.Status) {}
  // GET /collections/:collection/partitions/:partition/statistics
  rpc GetPartitionStatistics(GetPartitionStatisticsRequest) returns (GetPartitionStatisticsResponse) {}
  // GET /collections/:collection/partitions-list
  rpc ShowPartitions(ShowPartitionsRequest) returns (ShowPartitionsResponse) {}

  // ...


Design Details(required)

Add a http server on proxy module with a popular go HTTP framework. (GIN maybe)

The HTTP API should be designed by RESTful Principles and should implement all the methods that gRPC interface supports.

When http server receives a request, it converts the request to corresponding gRPC request, and then reuse the gRPC handling procedure to finish serving the request.Web module

As we can see from the milvus v2 architecture, all the gRPC requests first go into the Access Layer, which is the milvus-proxy service, where the requests are then propagated to other funtional services of milvus. So that's where we should put our web server.


After the http request parsed, it's translated into the same req struct as we mentioned above, and the rest things can be done by the gRPC handlers which were already implemented.

Web Framework

We'll use golang for easy integration with current proxy. And we'll use GIN is the most popular and also easy to use golang web framework.

TODO Tasks:


  • Refine the design details.
  • Decide on which web server framework we should use.
  • Initialize the framework together with an example of API code.