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fix: Skip Azure Monitor profiler on unsupported OS #1113

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Merged
BenjaminMichaelis merged 1 commit into from
May 16, 2026
Merged

fix: Skip Azure Monitor profiler on unsupported OS #1113

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18 changes: 17 additions & 1 deletion EssentialCSharp.Web/Program.cs
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
using System.Security.Claims;
using System.Runtime.InteropServices;
using System.Threading.RateLimiting;
using ModelContextProtocol.Protocol;
using EssentialCSharp.Chat.Common.Extensions;
Expand Down Expand Up @@ -51,6 +52,8 @@ private static void Main(string[] args)
string? appInsightsConnectionString = builder.Configuration["APPLICATIONINSIGHTS_CONNECTION_STRING"];
bool useAzureMonitor = !string.IsNullOrWhiteSpace(appInsightsConnectionString);
bool useOtlp = !string.IsNullOrWhiteSpace(builder.Configuration["OTEL_EXPORTER_OTLP_ENDPOINT"]);
bool profilerSupportedPlatform = OperatingSystem.IsWindows() || OperatingSystem.IsLinux();
bool profilerSkippedUnsupportedPlatform = false;

builder.Logging.AddOpenTelemetry(logging =>
{
Expand Down Expand Up @@ -91,7 +94,15 @@ private static void Main(string[] args)
});

if (useAzureMonitor)
otel.UseAzureMonitor().AddAzureMonitorProfiler();
{
// Azure Monitor export is supported cross-platform, but the profiler currently only
// supports Windows and Linux.
var azureMonitor = otel.UseAzureMonitor();
if (profilerSupportedPlatform)
azureMonitor.AddAzureMonitorProfiler();
else
profilerSkippedUnsupportedPlatform = true;
}
else if (useOtlp)
otel.UseOtlpExporter();

Expand Down Expand Up @@ -127,6 +138,8 @@ private static void Main(string[] args)
var loggerFactory = LoggerFactory.Create(loggingBuilder =>
loggingBuilder.AddConsole().SetMinimumLevel(LogLevel.Information));
var initialLogger = loggerFactory.CreateLogger<Program>();
if (profilerSkippedUnsupportedPlatform)
LogSkippingUnsupportedAzureMonitorProfiler(initialLogger, RuntimeInformation.OSDescription);

builder.Services.AddDbContext<EssentialCSharpWebContext>(options => options.UseSqlServer(connectionString, sql => sql.EnableRetryOnFailure(5)));

Expand Down Expand Up @@ -623,4 +636,7 @@ private static bool IsMcpTransportRequest(HttpRequest request) =>

[LoggerMessage(Level = LogLevel.Warning, Message = "Ignoring invalid TryDotNet origin in CSP: {Origin}")]
private static partial void LogIgnoringInvalidTryDotNetOrigin(ILogger logger, string origin);

[LoggerMessage(Level = LogLevel.Warning, Message = "Azure Monitor profiler is not supported on this platform ({Platform}). Skipping profiler registration and continuing with Azure Monitor telemetry export.")]
private static partial void LogSkippingUnsupportedAzureMonitorProfiler(ILogger<Program> logger, string platform);
}
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