metrics test

.http/actuator.http

@@ -0,0 +1,9 @@
+### Thing
+GET http://localhost:8080/actuator
+
+### info
+GET http://localhost:8080/actuator/info
+
+### Prometheus
+GET http://localhost:8080/actuator/prometheus
+

build.gradle.kts

@@ -14,9 +14,11 @@ dependencies {
     implementation(aa.springboot.starter.actuator)
     implementation(aa.springboot.starter.webflux)
 
-    implementation("io.micrometer:micrometer-tracing:1.4.4")
-    implementation("io.micrometer:micrometer-tracing-bridge-otel:1.4.4")
-    implementation("io.opentelemetry:opentelemetry-exporter-otlp:1.39.0")
+    implementation("io.micrometer:micrometer-registry-otlp")
+    implementation("io.micrometer:micrometer-registry-prometheus")
+    implementation("io.micrometer:micrometer-tracing")
+    implementation("io.micrometer:micrometer-tracing-bridge-otel")
+    implementation("io.opentelemetry:opentelemetry-exporter-otlp")
 
     testImplementation(aa.kotlin.junit5)
     testImplementation(aa.kotlinx.coroutines.test)

src/main/resources/application.yml

@@ -17,12 +17,14 @@ management:
       show-details: always
     info:
       access: read_only
+    prometheus:
+      access: read_only
   endpoints:
     access:
       default: none
     web:
       exposure:
-        include: "health,info"
+        include: "health,info,prometheus"
   tracing:
     sampling:
       probability: '1.0'
@@ -57,4 +59,11 @@ spring:
 management:
   otlp:
     tracing:
-      endpoint: http://jaeger-collector.jaeger.svc.cluster.local:4318/v1/traces
+      endpoint: http://opentelemetry-collector.observability.svc.cluster.local:4318/v1/traces
+    metrics:
+      export:
+        url: http://opentelemetry-collector.observability.svc.cluster.local:4318/v1/metrics  # Or gRPC: http://... but stick to HTTP for consistency
+  metrics:
+    export:
+      otlp:
+        step: 30s  # Optional: Push every 30s for demo; default 60s