Grafana example's docker-compose crashes

[dylemma]

I was trying out the example project at https://typelevel.org/otel4s/examples/grafana/#config-otel-collector-config-yaml and was getting this in my application:

[error] WARNING: Failed to export spans. Server responded with gRPC status code 2. Error message: Failed to connect to localhost/0:0:0:0:0:0:0:1:4317

It turned out the otel-collector container in the docker-compose was crashing because it didn't like jaeger as a keyword.

otel-collector-1  | * error decoding 'exporters': unknown type: "jaeger" for id: "jaeger" (valid values: [<component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value> <component.Type Value>])
otel-collector-1 exited with code 1

Some googling later, I found https://stackoverflow.com/a/77482579/574815 which recommended using otlp in place of jaeger. Swapping exporters.jaeger to exporters.otlp, and service.pipelines.exporters: [jaeger] to service.pipelines.exporters: [otlp] seems to have solved it for me.

[dylemma]

Some time later, I'm not sure the changes I made were necessarily correct. The images run, but I don't get any data in Jaeger when I run the example app.

[iRevive]

Jaeger exporter has been deprecated in the recent versions of the OTEL collector. We should update the example to use otlp/jaeger https://opentelemetry.io/blog/2023/jaeger-exporter-collector-migration/.