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#678 in Debugging

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MIT license

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Tracing — Structured, application-level diagnostics


Support for logging tracing events natively to journald, preserving structured information.

Crates.io Documentation (master) MIT licensed maintenance status


tracing is a framework for instrumenting Rust programs to collect scoped, structured, and async-aware diagnostics. tracing-journald provides a tracing-subscriber::Layer implementation for logging tracing spans and events to systemd-journald, on Linux distributions that use systemd.

Compiler support: requires rustc 1.49+

Supported Rust Versions

Tracing is built against the latest stable release. The minimum supported version is 1.49. The current Tracing version is not guaranteed to build on Rust versions earlier than the minimum supported version.

Tracing follows the same compiler support policies as the rest of the Tokio project. The current stable Rust compiler and the three most recent minor versions before it will always be supported. For example, if the current stable compiler version is 1.45, the minimum supported version will not be increased past 1.42, three minor versions prior. Increasing the minimum supported compiler version is not considered a semver breaking change as long as doing so complies with this policy.


This project is licensed under the MIT license.


Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in Tracing by you, shall be licensed as MIT, without any additional terms or conditions.