ASP.NET Core middleware and stand-alone Kestrel server for exporting metrics to Prometheus
See the version list below for details.
Requires NuGet 2.8 or higher.
Install-Package prometheus-net.AspNetCore -Version 3.6.0
dotnet add package prometheus-net.AspNetCore --version 3.6.0
<PackageReference Include="prometheus-net.AspNetCore" Version="3.6.0" />
paket add prometheus-net.AspNetCore --version 3.6.0
- Added ASP.NET Core health check publisher for publishing metrics on health check status. #203 #209
- Fixed hang in ASP.NET Web API exporter. #215
- Fixed ASP.NET Web API exporter exporting metrics from the wrong registry. #217
- Reduced memory use in MetricPusher implementation. Inspired by #208
- Added basic gRPC service metrics support. #212
- Reduce pointless log spam on cancelled scrapes - will silently ignore cancelled scrapes in the ASP.NET Core exporter. #220
- Exposed metric.Unpublish() method since there was already a matching Publish() there.
- When the scrape is aborted, stop collecting/serializing metrics. #189
- Added simple metric export handler for legacy ASP.NET Web API, to avoid having to deal with HttpListener complexity.
- Separate packaging for ASP.NET Core 3 to reduce package reference management complexity for users. #164
- Lazy-initialize the default sample metrics to reduce initialization cost for those who do not need them. #170
- ASP.NET Core middlware no longer disposes of output stream. #171
- Fix DotNetStats occasional data tearing under parallel collections. #173
- Improved wording of some error messages. #169
- Added Counter.IncTo(), Gauge.IncTo(), Gauge.DecTo(). #181
- Added Gauge.Set(DateTimeOffset) and Gauge.IncTo(DateTimeOffset). #181
- Improve .NET Framework 4.6.1 packaging to include the ValueTuple reference automatically. #179
- ASP.NET Core HTTP metrics now capture route data before it is overwritten by an exception handler. #177
- ASP.NET Core HTTP "in progress" metrics now include controller/action labels (ASP.NET Core 3 only).
- Fixed concurrently defect in HTTP metrics that may have caused label values from wrong request to apply. #182
- The HttpListener based MetricServer can now handle more than one concurrent request.
- Added asynchronous "before collect" callbacks, giving user code more flexibility in metric updates.
- Added .Remove() to labeled metric instances for more convenient removal API (previously had to call method on parent instance).
- Added .Unpublish() to labeled metric instances to support temporary unpublishing of a metric, without discarding collected data (e.g. histogram buckets), during periods of data unavailability.
- Add ability to filter requests by port number when exporting metrics. #160
- Fix NuGet packaging defect that caused reference failures after installing .2.0 on .NET Core 2.1 or newer. #158
- 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
- Fix timezone mismatch in Summary that led to unintended delays in buffer flushing. #149
- Fix regression introduced in 3.1.0 where MetricPusher does not always flush metrics before stopping.
- Fix defect where Histogram batch observations only incremented sum by one value, instead of entire batch. #147
- Added missing UTF-8 charset to Content-Type header, so non-ASCII characters are interpreted correctly by browsers.
- 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.
- Now backward compatible with ASP.NET Core 2.1 (was 2.2+)
- Fix defect where histogram sum failed to increment.
- Fix ObjectDisposedException in MetricPusher.
- 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.
- Fixed wrong case used for metric type in the export data format. Should always be lowercase. #96
- Fixed potential conflict when using pushgateway and also other exporter libraries (see #89)
- Various minor fixes (see issues on GitHub for details).
- 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.
- 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)
- Added support for .NET 4.5 using System.Reactive 3.1.1.
- .NET 4.0 support continues to target Rx 2.5
- Fixed MetricPusher not flushing metrics when stopped
- Fixed label values escaping for ASCII formatter
- PushGateway support
- Various internal improvements (replaced locks with Interlocked operations)
- Fixed some metrics not updating, added process ID metric
- Replaced lock statements in Counter and Gauge with CAS
- optionally use https in MetricServer
- using UTF-8 in text formatter
- catching exceptions in MetricServer http loop
- disposing of MetricServer loop on Stop()
- Renamed some metric names to be in-line with prometheus guidelines (breaking change as far as the exported metrics are concerned)
- Add CPU, num handles, start time, num threads metrics to dot net stats collector
- Made DotNetStatsCollector default (previously it was PerfCounterCollector)
- Summary metric ported from go
- Fix header writing order
- Generalise scraping so it can be called externally without using the embedded http handler
- Introduced interfaces for all the metrics to make unlabelled collectors and their children polymorph
- Added the notion of OnDemandCollectors + a DotNetStatsCollector to avoid having to use .net perf counters
- Do not create unlabelled metric if label names are specified
- Allow specifying hostname in URL
- Fix null ref exception if 'Accept' header is not specified
* 0.0.3 - initial version
- prometheus-net (>= 3.6.0)
NuGet packages (21)
Showing the top 5 NuGet packages that depend on prometheus-net.AspNetCore:
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