opentelemetry-prometheus 0.29.1

Prometheus exporter for OpenTelemetry (This crate is discontinued and is no longer maintained)
Documentation 
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# OpenTelemetry Prometheus Exporter

![OpenTelemetry — An observability framework for cloud-native software.][splash]

[splash]: https://raw.githubusercontent.com/open-telemetry/opentelemetry-rust/main/assets/logo-text.png

[`Prometheus`] integration for applications instrumented with [`OpenTelemetry`]. 

**Warning: This crate is no longer recommended for use.**

Development of the Prometheus exporter has been discontinued. See the related
[issue](https://github.com/open-telemetry/opentelemetry-rust/issues/2451). This
crate depends on the unmaintained `protobuf` crate and has unresolved security
vulnerabilities. Version 0.29 will be the final release.

For Prometheus integration, we strongly recommend using the [OTLP] exporter
instead. Prometheus [natively supports
OTLP](https://prometheus.io/docs/guides/opentelemetry/#enable-the-otlp-receiver),
providing a more stable and actively maintained solution.

[OTLP]: https://docs.rs/opentelemetry-otlp/latest/opentelemetry_otlp/

[![Crates.io: opentelemetry-prometheus](https://img.shields.io/crates/v/opentelemetry-prometheus.svg)](https://crates.io/crates/opentelemetry-prometheus)
[![Documentation](https://docs.rs/opentelemetry-prometheus/badge.svg)](https://docs.rs/opentelemetry-prometheus)
[![LICENSE](https://img.shields.io/crates/l/opentelemetry-prometheus)](https://github.com/open-telemetry/opentelemetry-rust/blob/main/opentelemetry-prometheus/LICENSE)
[![GitHub Actions CI](https://github.com/open-telemetry/opentelemetry-rust/workflows/CI/badge.svg)](https://github.com/open-telemetry/opentelemetry-rust/actions?query=workflow%3ACI+branch%3Amain)
[![Slack](https://img.shields.io/badge/slack-@cncf/otel/rust-brightgreen.svg?logo=slack)](https://cloud-native.slack.com/archives/C03GDP0H023)

## OpenTelemetry Overview

OpenTelemetry is an Observability framework and toolkit designed to create and
manage telemetry data such as traces, metrics, and logs. OpenTelemetry is
vendor- and tool-agnostic, meaning that it can be used with a broad variety of
Observability backends, including open source tools like [Jaeger] and
[Prometheus], as well as commercial offerings.

OpenTelemetry is *not* an observability backend like Jaeger, Prometheus, or other
commercial vendors. OpenTelemetry is focused on the generation, collection,
management, and export of telemetry. A major goal of OpenTelemetry is that you
can easily instrument your applications or systems, no matter their language,
infrastructure, or runtime environment. Crucially, the storage and visualization
of telemetry is intentionally left to other tools.

[`Prometheus`]: https://prometheus.io
[`OpenTelemetry`]: https://crates.io/crates/opentelemetry

## Release Notes

You can find the release notes (changelog) [here](https://github.com/open-telemetry/opentelemetry-rust/blob/main/opentelemetry-prometheus/CHANGELOG.md).