Collector internal metrics

internal/supervisor/collector_config.yaml.tmpl

@@ -1,4 +1,12 @@
 receivers:
+  prometheus/internal:
+    config:
+      scrape_configs:
+        - job_name: otelcol
+          scrape_interval: 60s
+          static_configs:
+            - targets: ['127.0.0.1:9464']
+
   journald:
     units: []
     priority: info
@@ -30,10 +38,22 @@ processors:
     # Hard limit = limit_mib = 180 MiB.
     limit_mib: 180
     spike_limit_mib: 40
+  transform/internal:
+    metric_statements:
+      - context: metric
+        statements:
+          - set(name, Concat(["do_", name], ""))
+      - context: datapoint
+        statements:
+          - set(attributes["do-obsd-ver"], "0.1")
   batch/logs:
     send_batch_size: 1024
     send_batch_max_size: 2048
     timeout: 5s
+  batch/metrics:
+    send_batch_size: 1024
+    send_batch_max_size: 2048
+    timeout: 5s
 
 exporters:
   otlp_grpc:
@@ -55,7 +75,7 @@ exporters:
 service:
   telemetry:
     metrics:
-      # Internal metrics on loopback only (replaces deprecated metrics.address for otelcol 0.130+).
+      level: normal
       readers:
         - pull:
             exporter:
@@ -67,3 +87,7 @@ service:
       receivers: [journald]
       processors: [memory_limiter, batch/logs]
       exporters: [otlp_grpc]
+    metrics/internal:
+      receivers: [prometheus/internal]
+      processors: [memory_limiter, transform/internal, batch/metrics]
+      exporters: [otlp_grpc]

internal/supervisor/collector_config_test.go

@@ -40,6 +40,12 @@ func TestBuildConfig(t *testing.T) {
 			if !strings.Contains(s, "server_name_override: insights-otlp.digitalocean.com") {
 				t.Fatalf("server_name_override not found in config:\n%s", s)
 			}
+			if !strings.Contains(s, "level: normal") {
+				t.Fatalf("telemetry metrics level: normal not found in config:\n%s", s)
+			}
+			if !strings.Contains(s, "scrape_interval: 60s") {
+				t.Fatalf("scrape_interval: 60s not found in config:\n%s", s)
+			}
 		})
 	}
 }