otel collector self monitoring

otel-collector/config.yaml

@@ -10,6 +10,13 @@ receivers:
         endpoint: 0.0.0.0:4317
       http:
         endpoint: 0.0.0.0:4318
+  prometheus/self:
+    config:
+      scrape_configs:
+        - job_name: otel-collector-metrics
+          scrape_interval: 10s
+          static_configs:
+            - targets: ["localhost:8888"]
 
 processors:
   batch:
@@ -36,7 +43,7 @@ service:
       exporters:
         - otlp/tempo
     metrics:
-      receivers: [otlp]
+      receivers: [otlp, prometheus/self]
       processors: [batch]
       exporters:
         - prometheusremotewrite