# `🪵️ tracing-logfmt-otel`
**Logfmt formatter for tracing-subscriber with opentelemetry support**
[](https://embark.dev)
[](https://discord.gg/dAuKfZS)
[](https://crates.io/crates/tracing-logfmt-otel)
[](https://docs.rs/tracing-logfmt-otel)
[](https://deps.rs/repo/github/elkowar/tracing-logfmt-otel)
[](https://github.com/elkowar/tracing-logfmt-otel/actions)
## Opentelemetry support
This crate is a fork of [EmbarkStudios/tracing-logfmt](https://github.com/EmbarkStudios/tracing-logfmt) that adds
the [opentelemetry](https://github.com/open-telemetry/opentelemetry-rust) trace and span id to the log output.
## Logfmt
Logfmt is a compact and simple log format for structured logging. Each log row contains one level of key/value pairs. To keep it as compact and readable as possible, values are only quoted if needed.
```logfmt
key=value otherkey="value with spaces" third="with escaped \"chars\""
```
There is no strict standard for the format, but it was first documented in [this article](https://brandur.org/logfmt) by Brandur Leach.
### License
This contribution is dual licensed under EITHER OF
* Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or )
* MIT license ([LICENSE-MIT](LICENSE-MIT) or )
at your option.
For clarity, "your" refers to Embark or any other licensee/user of the contribution.