prometheus-net

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.

This release increases backward compatibility to cover ASP.NET Core 2.1 (was previously 2.2+).

• 3.0.2

• Fix defect where histogram sum failed to increment (#126).

Fix ObjectDisposedException in MetricPusher (#124)

• 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).

• 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.
• Merged PRs adding some more convenient API usage scenarios.

• 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)