[chore] Make all OTel Demo components use the http/protobuf OTLP protocol #2676
Description
Some OTel Demo components requires to use the grpc OTLP protocol, not supporting the default http/protobuf OTLP protocol.
This increases the complexity of the configuration.
Analysis of the current implementations. Legend:
- 🟢 : seems to support otlp http/protobuf just through env vars
- 🔴 : seems to have coded dependency on OTLP grpc
- 🟠 : unclear
| service | OTLP protocol currently used | programming language | OTel SDK config file (GitHub) |
|---|---|---|---|
| accounting | unknown | C# (.NET) | unknown 🟠 (likely Program.cs or a Telemetry file) |
| ad | grpc (default via Java agent) | Java (agent) | Java agent via env/args (no SDK file) – Dockerfile |
| cart | unknown | C# (.NET) | unknown |
| checkout | unknown | Go | main.go 🟢 |
| currency | unknown | C++ | tracer_common.h 🔴 otlp_grpc_exporter_factory.h |
| unknown | Ruby | email_server.rb 🟢 | |
| flagd-ui | unknown | Phoenix Fwk | mix.exs 🟠 probably ok |
| fraud-detection | unknown | Kotlin | 🟢 java agent |
| frontend | unknown | Node.js | Instrumentation.js 🔴 '@opentelemetry/exporter-trace-otlp-grpc' |
| frontend-proxy | OTLP http/protobuf (4318) | Envoy | envoy.tmpl.yaml ❓ unclear to @cyrille-leclerc |
| image-provider | OTLP grpc (4317) | NGINX (OTEL module) | nginx.conf.template 🔴 nginx_otel_module requires gRPC |
| payment | OTLP http/protobuf (Node default) | Node.js | opentelemetry.js 🔴 require('@opentelemetry/exporter-trace-otlp-grpc') |
| product-catalog | unknown | Go | main.go 🔴 go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc |
| quote | unknown | PHP | routes.php... 🟠 no reference to grpc found |
| recommendation | unknown | Python | requirements.txt 🔴 opentelemetry-exporter-otlp-proto-grpc==1.38.0 |
| load-generator | unknown | Python | locustfile.py 🔴 opentelemetry.exporter.otlp.proto.grpc.trace_exporter |
| shipping | unknown | Rust | telemetry_conf.rs 🟢 no dependency found on otlp grpc |