prometheus/client_rust

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Prometheus / OpenMetrics client library in Rust

Stars: 606
Forks: 113
Open beginner issues: 0
Indexed issues: 44
Avg merge: 9h 7m
Merged PRs (30d): 8

Dominant language: Rust
License: Apache-2.0
Last GitHub push: Sep 14, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted good first issue

Beginner friendly Everything

Open All

44 open issues indexed

Reading metrics out of Registry as structured data Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

prometheus/client_rust#301 · Opened May 15, 2026
Footgun when retrieving multiple metrics from the same family Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

prometheus/client_rust#300 · Opened Apr 28, 2026
Registering a metric multiple times - foot-gun Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

prometheus/client_rust#292 · 2 comments · Opened Jan 5, 2026
[IDEA]: Add helper for implementing `EncodeLabelSet` manually Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

prometheus/client_rust#288 · 3 comments · Opened Oct 23, 2025
Change `Family::new_with_constructor` to be `impl Fn() -> C` instead of function pointer `fn` Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

prometheus/client_rust#287 · 2 comments · Opened Oct 22, 2025
Counter and Family encode empty LabelSet differently Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

prometheus/client_rust#286 · 2 comments · Opened Sep 22, 2025
Feature Request: Add `#[prometheus(skip_encoding_if = "...")]` for conditional label encoding in EncodeLabelSet derive Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

prometheus/client_rust#284 · 2 comments · 1 reaction · Opened Sep 10, 2025
implementations of encode_family on text & protobuf are not symmetric Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

prometheus/client_rust#272 · 4 comments · Opened Jul 8, 2025
Derive macro doesn't keep the struct's generics Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

prometheus/client_rust#268 · Opened Apr 17, 2025
Provide a way to set a `Counter` to an absolute value Open

Difficulty 5/5 Over a week Newbie friendliness 38/100

prometheus/client_rust#252 · 12 comments · 3 reactions · Opened Dec 4, 2024
UTF8 Label Encoding Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

prometheus/client_rust#251 · 1 comment · Opened Dec 2, 2024
Performance regresssion with (&'static str, &'static str) label set. Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

prometheus/client_rust#248 · 6 comments · Opened Nov 26, 2024
Tracking issue for complete 32-bit support Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

prometheus/client_rust#207 · 1 comment · Opened Jul 2, 2024
Provide a way to prevent unbounded metric growth Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

prometheus/client_rust#197 · 8 comments · 1 reaction · Opened Apr 29, 2024
Implement Atomic for usize Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

prometheus/client_rust#193 · 3 comments · 1 reaction · Opened Apr 16, 2024
UTF-8: Implement support in Rust client library Open

help wanted priority/P3

prometheus/client_rust#190 · 6 comments · 2 assignees · Opened Mar 5, 2024
Allow construct a histogram family with a closure Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

prometheus/client_rust#167 · 2 comments · Opened Oct 3, 2023
Abstract key lookup into a trait for Family::get_or_create Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

prometheus/client_rust#157 · 4 comments · 2 reactions · Opened Aug 11, 2023
Custom Collector with `sub_registry_with_prefix` outputs name multiple times Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

prometheus/client_rust#155 · 3 comments · Opened Jul 17, 2023
Public encoding functions? Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

prometheus/client_rust#152 · 4 comments · Opened Jun 7, 2023
Escaping? Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

prometheus/client_rust#151 · 3 comments · Opened Jun 7, 2023
feat: derive register logic on struct of metrics Open

enhancement good first issue help wanted

Difficulty 5/5 Over a week Newbie friendliness 35/100

prometheus/client_rust#140 · 2 comments · Opened May 15, 2023
Allow flattening of a struct through derive(EncodeLabelSet) at any position Open

help wanted

Difficulty 4/5 3-5 days Newbie friendliness 45/100

prometheus/client_rust#135 · 7 comments · Opened Apr 15, 2023
Clone Family.metrics and iterate over family Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

prometheus/client_rust#131 · 4 comments · 2 reactions · Opened Mar 15, 2023
Allow to optionally specify timestamps Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

prometheus/client_rust#126 · 6 comments · 3 reactions · Opened Jan 14, 2023
Undeterministic order in output Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

prometheus/client_rust#125 · 14 comments · Opened Jan 10, 2023
Missing GaugeWithExemplar Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

prometheus/client_rust#122 · 2 comments · Opened Jan 5, 2023
Support deriving metric storage Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

prometheus/client_rust#120 · 2 comments · Opened Dec 24, 2022
Metric names containing spaces are not valid Open

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

prometheus/client_rust#112 · 1 comment · Opened Dec 6, 2022
Does this crate implement Prometheus or OpenMetrics? Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

prometheus/client_rust#111 · 9 comments · Opened Dec 6, 2022
Counter API is overly restrictive Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

prometheus/client_rust#108 · 3 comments · 2 reactions · Opened Nov 11, 2022
HistogramTimer API Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

prometheus/client_rust#101 · 2 comments · Opened Sep 30, 2022
exporting metrics lists without registering them Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

prometheus/client_rust#86 · 1 comment · Opened Sep 2, 2022
Using `()` as label set generates invalid format Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

prometheus/client_rust#75 · 7 comments · Opened Jul 27, 2022
Expensive metric validation in debug mode Open

good first issue help wanted

Difficulty 5/5 Over a week Newbie friendliness 25/100

prometheus/client_rust#52 · 10 comments · Opened Mar 11, 2022
Metric names are incorrectly generated Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

prometheus/client_rust#51 · 8 comments · Opened Mar 9, 2022
Custom collector for multiple metrics Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

prometheus/client_rust#49 · 12 comments · Opened Feb 28, 2022
Implement Summary metric Open

good first issue help wanted

prometheus/client_rust#40 · 7 comments · 2 reactions · 1 assignee · Opened Jan 24, 2022
Const Metrics / Custom Collectors Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

prometheus/client_rust#36 · 10 comments · Opened Jan 20, 2022
Implementing a process collector Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

prometheus/client_rust#29 · 20 comments · Opened Dec 14, 2021
Global registry pattern Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

prometheus/client_rust#25 · 7 comments · 7 reactions · Opened Nov 12, 2021
derive-text-encode: Support New Type Idiom Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

prometheus/client_rust#15 · Opened May 16, 2021
src/metrics: Support custom ad-hoc metrics Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

prometheus/client_rust#11 · 1 comment · 1 reaction · Opened Apr 7, 2021
src/registry: Consider using Into for metric when registering Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

prometheus/client_rust#9 · Opened Mar 12, 2021

prometheus/client_rust

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