error trying to connect: invalid URL, scheme is not http

[tobymurray]

I'm new to this entire ecosystem and I'm trying to use this crate with Honeycomb. My code looks like:

    let honeycomb_exporter = opentelemetry_otlp::new_exporter()
        .http()
        .with_headers(headers)
        .with_endpoint("https://api.honeycomb.io/v1/traces");

    let tracer = opentelemetry_otlp::new_pipeline()
        .tracing()
        .with_exporter(honeycomb_exporter)
        .install_batch(opentelemetry::runtime::Tokio)
        .unwrap();

Cargo.toml

opentelemetry = { version = "*", features = [ "rt-tokio" ] }
opentelemetry-otlp = { version = "*", features = [ "http-proto", "reqwest-client" ] }
tokio = { version = "*", features = ["full"] }

and yields:

OpenTelemetry trace error occurred. error sending request for url (https://api.honeycomb.io/v1/traces): error trying to connect: invalid URL, scheme is not http

How am I expected to configure this? Honeycomb needs HTTPS but it seems like how I'm using this crate is wrong.

[tobymurray]

I have no idea why, but the version of reqwest seems to be related to this. Relying on the reqwest client in opentelemetry-oltp seems to resolve this for me?

[maxmcd]

This is because opentelemetry_otel has reqwest = { version = "0.12", default-features = false }.

If you add reqwest as a dependency directly it will include the default-tls feature.

Best bet is to change otlp to opentelemetry-otlp = { version = "*", features = ["reqwest-rustls"] } as @chinmoyrp is suggesting.

[chinmoyrp]

From what I understood this error is related to TLS. Adding the feature reqwest-rustls to opentelemetry-otlp fixed it for me.