GRPC is a difficult protocol to troubleshoot so there doesn't seem to be a tool that enables this sort of inspection today. The otel-cli looks to be close.

The main use case is validating configuration of load balancers in front of GRPC servers (Otel Collector, Refinery, etc)

Example cli command: otel-cli status --keepalive 1 --verbose --fail

An output that has something like:

• connection established with a timestamp
• an output for each recoverable error with a timestamp
• an attempt to reconnect?

Initial idea was to add a keepalive flag and verbose level log output to processGrpcStatus function: