update template config

otel-collector/config.yaml

@@ -1,28 +1,34 @@
-# This is a template configuration for OpenTelemetry collector.
+# This is the template configuration for OpenTelemetry collector, and is not used by default.
+# It is mounted to '/etc/otel-collector/config.yaml' in the otel-collector container.
 
 exporters:
-  # Add your exporter(s) configuration here.
-  # Refer to <link to otel config docs> for information on how to achieve different exporters. 
+  # Add your exporter(s) configuration here. For each exporter, make sure it is enabled
+  # in the service configuration below.
+  # Refer to our OpenTelemetry docs for information on how to configure different exporters:
+  # https://docs.sourcegraph.com/admin/observability/opentelemetry
 
 service:
-  extensions:
-    - health_check
-    - zpages
   pipelines:
     traces:
-      receivers:
-        - otlp
       exporters:
         # Add the name of your exporter(s) here, e.g.:
         # - logging
+      receivers:
+        - otlp # Do not remove this receiver
+  extensions:
+    # Do not remove these extensions
+    - health_check
+    - zpages
 
-extensions:
-  health_check:
-    port: 13133
-  zpages:
-    endpoint: "localhost:55679"
 receivers:
   otlp:
     protocols:
       grpc: # port 4317
       http: # port 4318
+
+extensions:
+  health_check:
+    port: 13133
+  zpages:
+    endpoint: "localhost:55679"
+