prometheus-net.AspNetCore 3.2.1

ASP.NET Core middleware and stand-alone Kestrel server for exporting metrics to Prometheus

Requires NuGet 2.8 or higher.

Install-Package prometheus-net.AspNetCore -Version 3.2.1
dotnet add package prometheus-net.AspNetCore --version 3.2.1
<PackageReference Include="prometheus-net.AspNetCore" Version="3.2.1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add prometheus-net.AspNetCore --version 3.2.1
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Release Notes

* 3.2.1
- Fix NuGet packaging defect that caused reference failures after installing .2.0 on .NET Core 2.1 or newer. #158
* 3.2.0
- Enable custom HTTP client to be used in MetricPusher, allowing for Basic auth and more flexibility. #125
- Add DiagnosticSourceAdapter (.NET Core only). #153
- Improved compatibility with older .NET Framework versions. #155
* 3.1.4
- Fix timezone mismatch in Summary that led to unintended delays in buffer flushing. #149
* 3.1.3
- Fix regression introduced in 3.1.0 where MetricPusher does not always flush metrics before stopping.
* 3.1.2
- Fix defect where Histogram batch observations only incremented sum by one value, instead of entire batch. #147
* 3.1.1
- Added missing UTF-8 charset to Content-Type header, so non-ASCII characters are interpreted correctly by browsers.
* 3.1.0
- Added ICounter.NewTimer() (adds the value to the counter)
- Eliminated some needless allocations when trying to register a metric that is already registered. #134
- Added IHistogram.Count and IHistogram.Sum to expose aspects of collected data for inspection.
- Added Collector.GetAllLabelValues() to expose the list of child metrics by all their known label values.
- Metric export is now asynchronous internally to be compatible with ASP.NET Core 3.0 default configuration.
- Added CollectorRegistry.CollectAndExportAsTextAsync() to support metric data export via arbitrary custom endpoints.
* 3.0.3
- Now backward compatible with ASP.NET Core 2.1 (was 2.2+)
* 3.0.2
- Fix defect where histogram sum failed to increment.
* 3.0.1
- Fix ObjectDisposedException in MetricPusher.
* 3.0.0
- Added HTTP request metrics for ASP.NET Core.
- Somewhat more realistic examples in readme.
- Metrics exporter is now significantly more CPU and memory-efficient.
- Added Observe(value, count) to histogram metric, enabling multiple observations with the same value to be counted.
- Added CountExceptions() and MeasureInProgress() helper extensions.
- Adjusted API to better conform to Prometheus client library guidelines in terms of default values.
- Breaking change: assemblies are now strong-named.
- Breaking change: removed "windows" from built-in metric names as they are not Windows-specific.
- Breaking change: removed support for protobuf export format (it is no longer used by Prometheus).
- Breaking change: API surface cleaned up, removed some legacy methods, made many internal types actually internal.
- Breaking change: "on demand collectors" concept replaced with simpler "before collect callbacks". Works the same, just less code needed to use it and fewer possible error conditions.
- Breaking change: removed support for "custom collectors", as this was a very special use case that did not benefit at all from the main functionality of the library. Just generate a Prometheus exporter output document yourself if you need to export arbitrary data.
* 2.1.3
- Fixed wrong case used for metric type in the export data format. Should always be lowercase. #96
* 2.1.2
- Fixed potential conflict when using pushgateway and also other exporter libraries (see #89)
* 2.1.1
- Various minor fixes (see issues on GitHub for details).
* 2.1.0
- Add MetricOptions and subclasses for more extensible API (old API surface remains available)
- Add SuppressInitialValue to metric configuration (ref https://www.robustperception.io/existential-issues-with-metrics/)
- Add .WithLabels() as alternative to .Labels() for fewer annoying Intellisense conflicts.
* 2.0.0
- Targeting .NET Standard 2.0 as minimum version (.NET Framework 4.6.1, .NET Core 2.0 and Mono 5.4)
- Added ASP.NET Core middlware
- Added possibility to signal a failed scrape from on-demand collectors
- Removed dependency on Reactive Extensions
- Minor breaking changes to API
- Performance improvements for hot-path code
- Removed mostly obsolete PerfCounterCollector class
- Fixed NuGet package contents to remove assemblies from dependencies
- Various minor fixes (see issues on GitHub for details)
* 1.3.4
- Added support for .NET 4.5 using System.Reactive 3.1.1.
- .NET 4.0 support continues to target Rx 2.5
* 1.2.4:
- Fixed MetricPusher not flushing metrics when stopped
* 1.2.3:
- Fixed label values escaping for ASCII formatter
* 1.2.2:
- PushGateway support
- Various internal improvements (replaced locks with Interlocked operations)    
* 1.1.4:
- Fixed some metrics not updating, added process ID metric
- Replaced lock statements in Counter and Gauge with CAS
* 1.1.3:
- optionally use https in MetricServer
* 1.1.2:
- using UTF-8 in text formatter
- catching exceptions in MetricServer http loop
* 1.1.1:
- disposing of MetricServer loop on Stop()
* 1.1.0:
- Renamed some metric names to be in-line with prometheus guidelines (breaking change as far as the exported metrics are concerned)
* 1.0.0:
- Add CPU, num handles, start time, num threads metrics to dot net stats collector
- Made DotNetStatsCollector default (previously it was PerfCounterCollector)
* 0.0.11:
- Summary metric ported from go
* 0.0.10:
- Fix header writing order
* 0.0.9:
- Generalise scraping so it can be called externally without using the embedded http handler
* 0.0.8:
- Introduced interfaces for all the metrics to make unlabelled collectors and their children polymorph
* 0.0.7:
- Added the notion of OnDemandCollectors + a DotNetStatsCollector to avoid having to use .net perf counters
* 0.0.6:
- Do not create unlabelled metric if label names are specified
* 0.0.5:
- Allow specifying hostname in URL
- Fix null ref exception if 'Accept' header is not specified
* 0.0.3 - initial version

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Version History

Version Downloads Last updated
3.2.1 4,114 10/2/2019
3.2.1-pre-000036-696f4ab 34 10/2/2019
3.2.0 110 10/1/2019
3.2.0-pre-000035-8d4cf7d 35 10/1/2019
3.2.0-pre-000032-9939133 47 9/25/2019
3.2.0-pre-000028-abe3225 33 9/25/2019
3.2.0-pre-000027-29e0fce 37 9/25/2019
3.1.5-pre-000023-d29ca37 81 9/24/2019
3.1.5-pre-000021-8c7b328 35 9/24/2019
3.1.5-pre-000020-5a2fc50 36 9/24/2019
3.1.4 182,887 6/20/2019
3.1.4-pre-000016-95d0170 60 6/20/2019
3.1.3 57,944 5/30/2019
3.1.3-pre-000009-505a08e 77 5/29/2019
3.1.3-cb-000009-505a08e 68 5/29/2019
3.1.2 46,410 4/27/2019
3.1.2-pre-006681-4f8ce09 208 4/23/2019
3.1.1 41,663 4/10/2019
3.1.1-pre-006463-cd3cd18 99 4/10/2019
3.1.0 21,272 3/29/2019
3.1.0-pre-006304-959164e 110 3/27/2019
3.1.0-pre-006267-9aac888 3,008 3/22/2019
3.1.0-pre-006177-d35e0b8 241 3/15/2019
3.0.3 127,565 2/11/2019
3.0.2 2,758 2/7/2019
3.0.1 907 2/6/2019
3.0.0 1,719 2/5/2019
3.0.0-pre-005830-d9493da 115 2/4/2019
3.0.0-pre-005828-27b7100 99 2/4/2019
3.0.0-pre-005823-68ad8e2 125 2/4/2019
3.0.0-pre-005803-4289c4a 109 2/1/2019
3.0.0-pre-005801-6f306bc 100 1/31/2019
3.0.0-pre-005800-ec1da05 106 1/31/2019
3.0.0-pre-005795-6aca95b 121 1/30/2019
3.0.0-pre-005647-e277cbe 167 1/9/2019
2.1.3 412,111 9/25/2018
2.1.3-pre-005238-380e4ab 155 9/25/2018
2.1.2 13,645 9/6/2018
2.1.2-pre-005131-012bc01 148 9/6/2018
2.1.1-pre-004445-bc00b93 1,675 5/25/2018
2.1.0 130,256 4/13/2018
2.1.0-pre-003985-910fb52 248 4/11/2018
2.1.0-pre-003982-37c9f93 245 4/11/2018
2.0.0 43,039 2/26/2018
2.0.0-pre-003523-49de0a3 1,161 2/22/2018
2.0.0-pre-003112-3de1c34 1,314 2/7/2018
2.0.0-pre-003077-0447c86 807 2/5/2018
2.0.0-pre-003054-ffb96c7 277 2/1/2018
2.0.0-pre-003051-6f12a46 261 2/1/2018
2.0.0-pre-003009-4e26344 261 1/27/2018
2.0.0-pre-002968-9fcb8aa 332 1/25/2018