Actix Web OpenTelemetry

OpenTelemetry integration for Actix Web.

Exporter configuration

actix-web uses tokio as the underlying executor, so exporters should be configured to be non-blocking:

[dependencies]
# if exporting to jaeger, use the `tokio` feature.
opentelemetry-jaeger = { version = "*", features = ["tokio"] }

# if exporting to zipkin, use the `tokio` based `reqwest-client` feature.
opentelemetry-zipkin = { version = "*", features = ["reqwest-client"], default-features = false }

# ... ensure the same same for any other exporters

Execute client and server example

# Run jaeger in background
$ docker run -d -p6831:6831/udp -p6832:6832/udp -p16686:16686 jaegertracing/all-in-one:latest

# Run server example with tracing middleware
$ cargo run --example server
# (In other tab) Run client example with request tracing
$ cargo run --example client

# View spans (see the image below)
$ firefox http://localhost:16686/