feat: Provide initial setup for custom metrics in Azure Application Insights (classic + workspace-based)

README.md

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-# GitHub Template
-GitHub template for all my future GitHub repos
+# Promitor - Data Generation
+
+Automation to generate data in Azure to run automated tests against for Promitor.
+
+![Logo](https://raw.githubusercontent.com/promitor/governance/main/logos/promitor-small.png)
+
+## Support
+
+Learn more about our support options [here](https://github.com/tomkerkhove/promitor/blob/master/SUPPORT.md).
+
+![Sponsors](https://raw.githubusercontent.com/promitor/governance/main/media/sponsor-overview.png)
+
+## Donate
+
+Promitor is fully OSS and built free-of-charge, however, if you appreciate my work
+you can do a small donation.
+
+[![Donate](https://img.shields.io/badge/Donate%20via-GitHub-blue.svg?style=flat-square)](https://github.com/sponsors/promitor)
+
+## License Information
+
+This is licensed under The MIT License (MIT). Which means that you can use, copy,
+modify, merge, publish, distribute, sublicense, and/or sell copies of the web
+application. But you always need to state that Tom Kerkhove is the original author
+of this web application.

src/Promitor.DataGeneration.CustomMetrics/.gitignore

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src/Promitor.DataGeneration.CustomMetrics/ApplicationInsightsCustomMetricsFunction.cs

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+using System;
+using System.Collections.Generic;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Logging;
+using Serilog;
+using Serilog.Configuration;
+using Serilog.Events;
+using Serilog.Extensions.Logging;
+
+namespace Promitor.DataGeneration.CustomMetrics
+{
+    public class ApplicationInsightsCustomMetricsFunction
+    {
+        public ILogger<ApplicationInsightsCustomMetricsFunction> Logger { get; }
+        private readonly Random _randomizer = new Random();
+        private const string OrdersCreatedMetricName = "Orders Created";
+
+        private readonly List<string> _tenants = new List<string>{ "Contoso", "Fabrikam", "Promito" };
+
+        internal ApplicationInsightsCustomMetricsFunction(string configurationKeyName, IConfiguration configuration)
+        {
+            var instrumentationKey = configuration.GetValue<string>(configurationKeyName);
+            var loggerConfiguration = new LoggerConfiguration()
+                .MinimumLevel.Debug()
+                .MinimumLevel.Override("Microsoft", LogEventLevel.Information)
+                .Enrich.FromLogContext()
+                .Enrich.WithComponentName("Promitor Automation")
+                .Enrich.WithVersion()
+                .WriteTo.Console()
+                .WriteTo.AzureApplicationInsights(instrumentationKey);
+
+            var serilogLogger = loggerConfiguration.CreateLogger();
+            Logger = new SerilogLoggerFactory(serilogLogger)
+                    .CreateLogger<ApplicationInsightsCustomMetricsFunction>();
+        }
+
+        public void SimulateNewOrdersCreated()
+        {
+            foreach (var tenant in _tenants)
+            {
+                SimulateNewOrdersCreated(tenant);
+            }
+        }
+
+        private void SimulateNewOrdersCreated(string tenantName)
+        {
+            // Annotate with contextual information
+            var contextualInformation = new Dictionary<string, object>
+            {
+                {"Tenant", tenantName}
+            };
+
+            // Generate order amount            
+            var orderAmount = _randomizer.Next(100, 1337);
+
+            // Log metric
+            Logger.LogMetric(OrdersCreatedMetricName, orderAmount, contextualInformation);
+        }
+    }
+}

src/Promitor.DataGeneration.CustomMetrics/ApplicationInsightsWithClassicCustomMetricsFunction.cs

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+using Microsoft.Azure.WebJobs;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Logging;
+
+namespace Promitor.DataGeneration.CustomMetrics
+{
+    public class ApplicationInsightsWithClassicCustomMetricsFunction : ApplicationInsightsCustomMetricsFunction
+    {
+        public ApplicationInsightsWithClassicCustomMetricsFunction(IConfiguration configuration)
+            : base("APPLICATIONINSIGHTS_CLASSIC_INSTRUMENTATIONKEY", configuration)
+        {
+        }
+
+        [FunctionName("custom-metrics-application-insights-classic")]
+        public void Run([TimerTrigger("0 */5 * * * *")]TimerInfo timerInfo)
+        {
+            Logger.LogInformation("Simulating new orders for classic Azure Application Insights");
+
+            SimulateNewOrdersCreated();
+
+            Logger.LogInformation("New orders simulated for classic Azure Application Insights");
+        }
+    }
+}