OpenTelemetry

documentation/docs/developer-guide/logging/opentelemetry.md

@@ -0,0 +1,98 @@
+# Open Telemetry logging
+
+- Scroll down to [setup](#setup) for the settings
+
+## Why OpenTelemetry?
+
+OpenTelemetry has emerged as a powerful and 
+standardized solution to address the challenges of observability in modern, 
+distributed systems.
+
+OpenTelemetry is an open-source project that provides a set of APIs, libraries, agents, 
+and instrumentation to enable observability in cloud-native applications. 
+
+Observability, in the context of software systems, 
+refers to the ability to understand and measure how well a system is operating. 
+It involves collecting and analyzing data related to key aspects such as traces, 
+metrics, and logs. OpenTelemetry focuses on two primary pillars of observability: 
+tracing and metrics.
+
+### Distributed Tracing:
+OpenTelemetry allows developers to trace requests as they traverse 
+through various services in a distributed environment. 
+This helps identify performance bottlenecks, understand dependencies between services, 
+and diagnose issues across the entire application stack. 
+By providing a standardized way to instrument code and capture trace data, 
+OpenTelemetry simplifies the process of generating insights into the flow of requests in complex, 
+microservices-based architectures.
+
+### Metrics Collection:
+Monitoring the health and performance of applications involves the collection of metrics. 
+OpenTelemetry provides a consistent API for capturing metrics from different parts of an application. 
+Metrics such as latency, error rates, and resource utilization 
+can be collected and analyzed to gain a comprehensive view of application behavior. 
+This information is invaluable for proactive issue detection, capacity planning, and overall system optimization.
+
+OpenTelemetry supports multiple programming languages and integrates seamlessly with various observability backends, 
+including popular solutions like Prometheus, Jaeger, and Grafana. 
+
+Its adaptability and community-driven development make it a versatile choice for organizations seeking 
+to implement observability in their applications, regardless of the technology stack they use.
+
+In conclusion, OpenTelemetry plays a pivotal role in the modern software development landscape by providing 
+a standardized and extensible framework for observability. 
+Its ability to capture distributed traces and metrics empowers developers and operators to 
+gain deep insights into the performance and behavior of their applications, 
+facilitating efficient troubleshooting and continuous improvement.
+
+## Setup
+The following settings can be used:
+
+### json configuration
+
+use for example this file name: appsettings.machinename.json
+
+### Order of appsettings patch files
+
+1.  You can use `appsettings.json` inside the application folder to set base settings.
+    The order of this files is used to get the values from the appsettings
+    -    `/bin/Debug/net6.0/appsettings.patch.json`
+    -    `/bin/Debug/net6.0/appsettings.default.json`
+    -    `/bin/Debug/net6.0/appsettings.computername.patch.json`
+    -    `/bin/Debug/net6.0/appsettings.json`
+    -    `/bin/Debug/net6.0/appsettings.computername.json`
+
+```json
+{
+    "app" : {
+        "OpenTelemetry": {
+            "TracesEndpoint": "http://test",
+            "MetricsEndpoint": null,
+            "LogsEndpoint": null
+        }
+    }
+}
+```
+
+
+### Environment variables
+
+```bash
+"app__OpenTelemetry__TracesEndpoint": "https://otlp.eu01.nr-data.net:4318/v1/traces",
+"app__OpenTelemetry__MetricsEndpoint": "https://otlp.eu01.nr-data.net:4318/v1/metrics",
+"app__OpenTelemetry__LogsEndpoint": "https://otlp.eu01.nr-data.net:4318/v1/logs",
+"app__OpenTelemetry__Header": "api-key=EXAMPLE_KEY",
+"app__OpenTelemetry__ServiceName": "starsky-dev",
+```
+
+### Use a valid url
+The properties assume that the Url is valid. It should start with http or https
+
+```
+Unhandled exception. System.UriFormatException: Invalid URI: The format of the URI could not be determined.
+at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind, UriCreationOptions& creationOptions)
+at System.Uri..ctor(String uriString)
+at starsky.foundation.webtelemetry.Extensions.OpenTelemetryExtension.<>c__DisplayClass0_0.
+<AddOpenTelemetryMonitoring>b__4(OtlpExporterOptions o) in ..Extensions/OpenTelemetryExtension.cs:line 48
+```
+

documentation/docs/developer-guide/logging/readme.md

@@ -4,6 +4,9 @@ sidebar_position: 20
 
 # Logging
 
+## Open Telemetry logging
+See [Open Telemetry logging](opentelemetry.md)
+
 ## Desktop logs
 
 For the desktop app the logs are stored in following location:

history.md

@@ -36,7 +36,8 @@ Semantic Versioning 2.0.0 is from version 0.1.6+
 ## List of versions
 
 ## version 0.5.15 _(Unreleased)_ - 2024-01-? {#v0.5.15}
-- no changes yet
+
+- [x] (Added) _Back-end_ Add support for OpenTelemetry (server side only) (PR #1323)
 
 ## version 0.5.14 - 2023-12-29 {#v0.5.14}
 

starsky/starsky.foundation.platform/Helpers/AppSettingsCompareHelper.cs

@@ -33,11 +33,42 @@ public static List<string> Compare(AppSettings sourceIndexItem, object? updateOb
 
 				CompareMultipleSingleItems(propertyB, propertyInfoFromA, sourceIndexItem, updateObject, differenceList);
 				CompareMultipleListDictionary(propertyB, propertyInfoFromA, sourceIndexItem, updateObject, differenceList);
+				CompareMultipleObjects(propertyB, propertyInfoFromA, sourceIndexItem, updateObject, differenceList);
 
 			}
 			return differenceList;
 		}
 
+		private static void CompareMultipleObjects(PropertyInfo propertyB, PropertyInfo propertyInfoFromA, AppSettings sourceIndexItem, object updateObject, List<string> differenceList)
+		{
+			if (propertyInfoFromA.PropertyType == typeof(OpenTelemetrySettings) && propertyB.PropertyType == typeof(OpenTelemetrySettings))
+			{
+				var oldObjectValue = (OpenTelemetrySettings?)propertyInfoFromA.GetValue(sourceIndexItem, null);
+				var newObjectValue = (OpenTelemetrySettings?)propertyB.GetValue(updateObject, null);
+				CompareOpenTelemetrySettingsObject(propertyB.Name, sourceIndexItem, oldObjectValue, newObjectValue, differenceList);
+			}
+		}
+
+		private static void CompareOpenTelemetrySettingsObject(string propertyName, AppSettings? sourceIndexItem, 
+			OpenTelemetrySettings? oldKeyValuePairStringStringValue, 
+			OpenTelemetrySettings? newKeyValuePairStringStringValue, ICollection<string> differenceList)
+		{
+			if ( oldKeyValuePairStringStringValue == null ||
+			     newKeyValuePairStringStringValue == null || 
+			     // compare lists
+			     JsonSerializer.Serialize(oldKeyValuePairStringStringValue) == 
+			     JsonSerializer.Serialize(newKeyValuePairStringStringValue) ||
+			     // default options
+			     JsonSerializer.Serialize(newKeyValuePairStringStringValue) == 
+			     JsonSerializer.Serialize(new OpenTelemetrySettings()))
+			{
+				return;
+			}
+
+			sourceIndexItem?.GetType().GetProperty(propertyName)?.SetValue(sourceIndexItem, newKeyValuePairStringStringValue, null);
+			differenceList.Add(propertyName.ToLowerInvariant());
+		}
+
 		private static void CompareMultipleSingleItems(PropertyInfo propertyB,
 			PropertyInfo propertyInfoFromA,
 			AppSettings sourceIndexItem, object updateObject,

starsky/starsky.foundation.platform/Models/AppSettings.cs

@@ -879,6 +879,9 @@ private string AssemblyDirectoryReplacer(string value)
 		/// </summary>
 		public bool? ExiftoolSkipDownloadOnStartup { get; set; } = false;
 
+		public OpenTelemetrySettings OpenTelemetry { get; set; } =
+			new OpenTelemetrySettings();
+
 		/// <returns>AppSettings duplicated</returns>
 		/// <summary>
 		/// Duplicate this item in memory. AND remove _databaseConnection 
@@ -927,9 +930,43 @@ public AppSettings CloneToDisplay()
 				}
 			}
 
+			ReplaceOpenTelemetryData(appSettings);
+
 			return appSettings;
 		}
 
+		private static void ReplaceOpenTelemetryData(AppSettings appSettings)
+		{
+			if ( appSettings.OpenTelemetry == null )
+			{
+				return;
+			}
+
+			if (!string.IsNullOrEmpty(appSettings.OpenTelemetry.Header) )
+			{
+				appSettings.OpenTelemetry.Header =
+					CloneToDisplaySecurityWarning;
+			}
+
+			if (!string.IsNullOrEmpty(appSettings.OpenTelemetry.MetricsHeader) )
+			{
+				appSettings.OpenTelemetry.MetricsHeader =
+					CloneToDisplaySecurityWarning;
+			}
+
+			if (!string.IsNullOrEmpty(appSettings.OpenTelemetry.LogsHeader) )
+			{
+				appSettings.OpenTelemetry.LogsHeader =
+					CloneToDisplaySecurityWarning;
+			}
+
+			if (!string.IsNullOrEmpty(appSettings.OpenTelemetry.TracesHeader) )
+			{
+				appSettings.OpenTelemetry.TracesHeader =
+					CloneToDisplaySecurityWarning;
+			}
+		}
+
 		private static void ReplaceAppSettingsPublishProfilesCloneToDisplay(AppSettingsPublishProfiles value)
 		{
 			if ( !string.IsNullOrEmpty(value.Path) && value.Path != AppSettingsPublishProfiles.GetDefaultPath() )

starsky/starsky.foundation.platform/Models/OpenTelemetrySettings.cs

@@ -0,0 +1,44 @@
+namespace starsky.foundation.platform.Models;
+
+public class OpenTelemetrySettings
+{
+	public string Header { get; set; }
+
+	public string ServiceName { get; set; }
+	public string TracesEndpoint { get; set; }
+	public string TracesHeader { get; set; }
+
+	public string MetricsEndpoint { get; set; }
+	public string MetricsHeader { get; set; }
+
+	public string LogsEndpoint { get; set; }
+	public string LogsHeader { get; set; }
+
+	public string GetServiceName()
+	{
+		return string.IsNullOrWhiteSpace(ServiceName)
+			? "Starsky"
+			: ServiceName ;
+	}
+
+	public string GetLogsHeader()
+	{
+		return string.IsNullOrWhiteSpace(LogsHeader)
+			? Header
+			: LogsHeader;
+	}
+
+	public string GetMetricsHeader()
+	{
+		return string.IsNullOrWhiteSpace(MetricsHeader)
+			? Header
+			: MetricsHeader;
+	}
+
+	public string GetTracesHeader()
+	{
+		return string.IsNullOrWhiteSpace(TracesHeader)
+			? Header
+			: TracesHeader;
+	}
+}

starsky/starsky.foundation.webtelemetry/Extensions/OpenTelemetryExtension.cs

@@ -0,0 +1,103 @@
+using System;
+using System.Collections.Generic;
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.DependencyInjection;
+using OpenTelemetry.Exporter;
+using OpenTelemetry.Metrics;
+using OpenTelemetry.Resources;
+using OpenTelemetry.Trace;
+using starsky.foundation.platform.Models;
+
+[assembly: InternalsVisibleTo("starskytest")]
+namespace starsky.foundation.webtelemetry.Extensions;
+
+public static class OpenTelemetryExtension
+{
+	/// <summary>
+	/// Add Metrics & Monitoring for OpenTelemetry
+	/// </summary>
+	/// <param name="services">collection service</param>
+	/// <param name="appSettings">to use for OpenTelemetry keys and info</param>
+	public static void AddOpenTelemetryMonitoring(
+		this IServiceCollection services, AppSettings appSettings)
+	{
+		var telemetryBuilder = services.AddOpenTelemetry()
+			.ConfigureResource(resource => resource.AddService(
+				serviceNamespace: appSettings.OpenTelemetry.GetServiceName(),
+				serviceName: appSettings.OpenTelemetry.GetServiceName(),
+				serviceVersion: Assembly.GetEntryAssembly()?.GetName().Version
+					?.ToString(),
+				serviceInstanceId: Environment.MachineName
+			).AddAttributes(new Dictionary<string, object>
+			{
+				{
+					"deployment.environment",
+						Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT") ?? string.Empty
+				}
+			}));
+
+		if ( !string.IsNullOrWhiteSpace(appSettings.OpenTelemetry.TracesEndpoint) )
+		{
+			telemetryBuilder.WithTracing(tracing => tracing
+				.AddAspNetCoreInstrumentation(o => o.Filter = FilterPath)
+				.AddOtlpExporter(
+					o =>
+					{
+						o.Endpoint =
+							new Uri(appSettings.OpenTelemetry.TracesEndpoint);
+						o.Protocol = OtlpExportProtocol.HttpProtobuf;
+						o.Headers = appSettings.OpenTelemetry.GetTracesHeader();
+					}
+				).SetResourceBuilder(
+					ResourceBuilder.CreateDefault()
+						.AddService(appSettings.OpenTelemetry.GetServiceName())
+				)
+			);
+		}
+
+		if ( string.IsNullOrWhiteSpace(
+			    appSettings.OpenTelemetry.MetricsEndpoint) )
+		{
+			return;
+		}
+
+		telemetryBuilder.WithMetrics(metrics =>
+			metrics.AddAspNetCoreInstrumentation()
+				.AddRuntimeInstrumentation()
+				.AddHttpClientInstrumentation()
+				.AddOtlpExporter(
+					o =>
+					{
+						o.Endpoint = new Uri(appSettings.OpenTelemetry.MetricsEndpoint);
+						o.Protocol = OtlpExportProtocol.HttpProtobuf;
+						o.Headers = appSettings.OpenTelemetry.GetMetricsHeader();
+					})
+				.SetResourceBuilder(
+					ResourceBuilder.CreateDefault()
+						.AddService(appSettings.OpenTelemetry.GetServiceName())	
+				)
+		);
+	}
+
+	internal static bool FilterPath(HttpContext context)
+	{
+		if ( (context.Request.Path.Value?.EndsWith("/realtime") == true || 
+		     context.Request.Path.Value?.EndsWith("/api/health") == true || 
+		     context.Request.Path.Value?.EndsWith("/api/health/details") == true || 
+		     context.Request.Path.Value?.EndsWith("/api/open-telemetry/trace") == true) 
+		     && context.Response.StatusCode == 200)
+		{
+			return false;
+		}
+
+		if ( context.Request.Path.Value?.EndsWith("/api/index") == true
+		     && context.Response.StatusCode == 401)
+		{
+			return false;
+		}
+
+		return true;
+	}
+}