Actix Web OpenTelemetry

OpenTelemetry 对 Actix Web 的集成。

导出器配置

actix-web 使用 tokio 作为底层执行器，因此导出器应配置为非阻塞

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

# 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

执行客户端和服务器示例

# 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 --features awc

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

特性

• awc -- 启用对 awc http客户端的跟踪支持。
• metrics -- 启用对 OpenTelemetry度量（默认情况下仅启用跟踪）的支持
• metrics-prometheus -- 启用对 Prometheus度量的支持（需要 metrics 特性）
• sync-middleware -- 在返回future之前执行同步工作的 actix-web 中间件上启用跟踪。为每个请求添加少量开销。