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Last active November 13, 2025 15:18
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Umbraco Datadog Header Propagation for APM Tracing
<PackageReference Include="Microsoft.AspNetCore.HeaderPropagation" Version="9.0.10" />
WebApplicationBuilder builder = WebApplication.CreateBuilder(args);
builder.CreateUmbracoBuilder()
.AddBackOffice()
.AddWebsite()
.AddComposers()
.Build();
WebApplication app = builder.Build();
await app.BootUmbracoAsync();
// Enable header propagation middleware to capture incoming trace headers
app.UseHeaderPropagation();
app.UseUmbraco()
.WithMiddleware(u =>
{
u.UseBackOffice();
u.UseWebsite();
})
.WithEndpoints(u =>
{
u.UseBackOfficeEndpoints();
u.UseWebsiteEndpoints();
});
await app.RunAsync();
using Umbraco.Cms.Core.Composing;
using Umbraco.Cms.Core.DependencyInjection;
namespace DatadogUmbraco.Composers
{
public class TracingComposer : IComposer
{
public void Compose(IUmbracoBuilder builder)
{
// Configure header propagation for Datadog trace context
builder.Services.AddHeaderPropagation(options =>
{
// Datadog trace headers
options.Headers.Add("x-datadog-trace-id");
options.Headers.Add("x-datadog-parent-id");
options.Headers.Add("x-datadog-sampling-priority");
options.Headers.Add("x-datadog-origin");
options.Headers.Add("x-datadog-tags");
// W3C trace context headers
options.Headers.Add("traceparent");
options.Headers.Add("tracestate");
});
// Configure all HttpClient instances to use header propagation
builder.Services.ConfigureHttpClientDefaults(http =>
{
http.AddHeaderPropagation();
});
}
}
}
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