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feat: exchange gRPC server implementation to connectRPC (#10145)

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# Which Problems Are Solved

The current maintained gRPC server in combination with a REST (grpc)
gateway is getting harder and harder to maintain. Additionally, there
have been and still are issues with supporting / displaying `oneOf`s
correctly.
We therefore decided to exchange the server implementation to
connectRPC, which apart from supporting connect as protocol, also also
"standard" gRCP clients as well as HTTP/1.1 / rest like clients, e.g.
curl directly call the server without any additional gateway.

# How the Problems Are Solved

- All v2 services are moved to connectRPC implementation. (v1 services
are still served as pure grpc servers)
- All gRPC server interceptors were migrated / copied to a corresponding
connectRPC interceptor.
- API.ListGrpcServices and API. ListGrpcMethods were changed to include
the connect services and endpoints.
- gRPC server reflection was changed to a `StaticReflector` using the
`ListGrpcServices` list.
- The `grpc.Server` interfaces was split into different combinations to
be able to handle the different cases (grpc server and prefixed gateway,
connect server with grpc gateway, connect server only, ...)
- Docs of services serving connectRPC only with no additional gateway
(instance, webkey, project, app, org v2 beta) are changed to expose that
- since the plugin is not yet available on buf, we download it using
`postinstall` hook of the docs

# Additional Changes

- WebKey service is added as v2 service (in addition to the current
v2beta)

# Additional Context

closes #9483

---------

Co-authored-by: Elio Bischof <elio@zitadel.com>
This commit is contained in:
Livio Spring
2025-07-04 10:06:20 -04:00
committed by GitHub
parent 82cd1cee08
commit 9ebf2316c6
133 changed files with 5191 additions and 1187 deletions
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Makefile
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@@ -78,12 +78,13 @@ core_grpc_dependencies:
go install github.com/grpc-ecosystem/grpc-gateway/v2/protoc-gen-openapiv2@v2.22.0 # https://pkg.go.dev/github.com/grpc-ecosystem/grpc-gateway/v2/protoc-gen-openapiv2?tab=versions
go install github.com/envoyproxy/protoc-gen-validate@v1.1.0 # https://pkg.go.dev/github.com/envoyproxy/protoc-gen-validate?tab=versions
go install github.com/bufbuild/buf/cmd/buf@v1.45.0 # https://pkg.go.dev/github.com/bufbuild/buf/cmd/buf?tab=versions
go install connectrpc.com/connect/cmd/protoc-gen-connect-go@v1.18.1 # https://pkg.go.dev/connectrpc.com/connect/cmd/protoc-gen-connect-go?tab=versions
.PHONY: core_api
core_api: core_api_generator core_grpc_dependencies
buf generate
mkdir -p pkg/grpc
cp -r .artifacts/grpc/github.com/zitadel/zitadel/pkg/grpc/* pkg/grpc/
cp -r .artifacts/grpc/github.com/zitadel/zitadel/pkg/grpc/** pkg/grpc/
mkdir -p openapi/v2/zitadel
cp -r .artifacts/grpc/zitadel/ openapi/v2/zitadel