Replace gRPC code generation tool from Znly/protoc to Buf

cmd/db-manager/v1beta1/main.go

@@ -42,6 +42,8 @@ const (
 var dbIf common.KatibDBInterface
 
 type server struct {
+	api_pb.UnimplementedDBManagerServer
+	health_pb.UnimplementedHealthServer
 }
 
 // Report a log of Observations for a Trial.

cmd/suggestion/goptuna/v1beta1/main.go

@@ -32,6 +32,7 @@ const (
 )
 
 type healthService struct {
+	health_pb.UnimplementedHealthServer
 }
 
 func (s *healthService) Check(ctx context.Context, in *health_pb.HealthCheckRequest) (*health_pb.HealthCheckResponse, error) {

pkg/apis/manager/health/buf.gen.yaml

@@ -0,0 +1,27 @@
+version: v1
+managed:
+  enabled: true
+  go_package_prefix:
+    default: github.com/kubeflow/katib/.
+    except:
+      - buf.build/googleapis/googleapis
+plugins:
+  - plugin: buf.build/grpc/go:v1.3.0
+    out: ./
+    opt:
+      - paths=source_relative
+  # Choose one of the following protocol buffers plugin configurations
+  # based on your requirements
+  - plugin: buf.build/protocolbuffers/go:v1.33.0
+    out: ./
+    opt:
+      - paths=source_relative
+  # OR
+  # - plugin: buf.build/protocolbuffers/go
+  #   out: ./
+  #   opt:
+  #     - paths=source_relative
+  - plugin: buf.build/grpc/python:v1.62.0
+    out: python
+  - plugin: buf.build/protocolbuffers/python
+    out: python

pkg/apis/manager/health/buf.yaml

@@ -0,0 +1,7 @@
+version: v1
+breaking:
+  use:
+    - FILE
+lint:
+  use:
+    - DEFAULT