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feat(obs): OpenTelemetry distributed tracing across the five .NET services (refs #123)

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Each host adds AddOpenTelemetry().WithTracing with ASP.NET Core + HttpClient
auto-instrumentation and an OTLP exporter to Tempo; service name + endpoint from
OTEL_* env set per app service in compose. Since every cross-service call goes
through a typed HttpClient, traceparent propagates for free, so a request is one
connected trace (bff → domain/projection → acl → openzaak). /health is filtered
out. The exporter no-ops harmlessly when Tempo is unreachable (verified: domain
boots healthy with no collector).

refs #123
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2026-07-23 14:35:47 +02:00
parent b32c352f20
commit 271c54197e
11 changed files with 117 additions and 0 deletions
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services/event-subscriber/EventSubscriber.Api/EventSubscriber.Api.csproj
+7
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@@ -5,6 +5,13 @@
<ProjectReference Include="..\..\projection-api\Projection.ReadModel\Projection.ReadModel.csproj" />
</ItemGroup>
<ItemGroup>
<PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.17.0" />
<PackageReference Include="OpenTelemetry.Extensions.Hosting" Version="1.17.0" />
<PackageReference Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.17.0" />
<PackageReference Include="OpenTelemetry.Instrumentation.Http" Version="1.17.0" />
</ItemGroup>
<PropertyGroup>
<TargetFramework>net10.0</TargetFramework>
<Nullable>enable</Nullable>