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devops(backend): expose Prometheus metrics endpoint + OTLP trace export from Spring Boot #588

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marcel merged 3 commits from feat/issue-576-backend-instrumentation into main 2026-05-15 03:57:15 +02:00
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8
backend/pom.xml
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@@ -215,6 +215,14 @@
<groupId>io.opentelemetry.instrumentation</groupId> <groupId>io.opentelemetry.instrumentation</groupId>
<artifactId>opentelemetry-spring-boot-starter</artifactId> <artifactId>opentelemetry-spring-boot-starter</artifactId>
<version>2.27.0</version> <version>2.27.0</version>
<exclusions>
<!-- Excludes AzureAppServiceResourceProvider which references ServiceAttributes.SERVICE_INSTANCE_ID
that does not exist in the semconv version pulled by this project. -->
<exclusion>
<groupId>io.opentelemetry.contrib</groupId>
<artifactId>opentelemetry-azure-resources</artifactId>
</exclusion>
</exclusions>
</dependency> </dependency>
</dependencies> </dependencies>

6
backend/src/test/resources/application-test.yaml
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@@ -14,6 +14,12 @@ spring:
mail: mail:
host: localhost host: localhost
# Disable OTel SDK entirely in tests — prevents auto-configuration from loading resource providers
# (e.g. AzureAppServiceResourceProvider) that fail against the semconv version used here.
otel:
sdk:
disabled: true
# Disable trace export in tests — prevents OTLP connection attempts when no Tempo is running. # Disable trace export in tests — prevents OTLP connection attempts when no Tempo is running.
# Sampling probability 0.0 means no spans are created, so no export is attempted. # Sampling probability 0.0 means no spans are created, so no export is attempted.
management: management: