From 56e1bd80793aeea26d5115b5de75418d739d904e Mon Sep 17 00:00:00 2001
From: David Ashpole <dashpole@google.com>
Date: Thu, 5 Dec 2024 21:14:21 +0000
Subject: [PATCH] double-write metrics to otlphttp exporter and
 googlemanagedprometheus

---
 gcp/opentelemetry-demo-features.yaml.gotmpl | 3 +++
 src/otelcollector/otelcol-config-extras.yml | 6 ++++++
 2 files changed, 9 insertions(+)

diff --git a/gcp/opentelemetry-demo-features.yaml.gotmpl b/gcp/opentelemetry-demo-features.yaml.gotmpl
index bf6c4c24..cc344d29 100644
--- a/gcp/opentelemetry-demo-features.yaml.gotmpl
+++ b/gcp/opentelemetry-demo-features.yaml.gotmpl
@@ -62,4 +62,7 @@ opentelemetry-collector:
         traces:
           processors: [k8sattributes, memory_limiter, resourcedetection, resource, resource/gcp_project_id, batch]
           exporters: [otlphttp/gcp_auth]
+        metrics/otlp:
+          processors: [k8sattributes, memory_limiter, filter/currency, resourcedetection, transform/collision, resource, resource/gcp_project_id, transform/metricprefix, batch]
+          exporters: [otlphttp/gcp_auth]
 {{ end }}
diff --git a/src/otelcollector/otelcol-config-extras.yml b/src/otelcollector/otelcol-config-extras.yml
index a992cb11..aa5a623e 100644
--- a/src/otelcollector/otelcol-config-extras.yml
+++ b/src/otelcollector/otelcol-config-extras.yml
@@ -35,6 +35,12 @@ processors:
     detectors: [gcp]
     timeout: 10s
 
+  transform/metricprefix:
+    metric_statements:
+    - context: metric
+      statements:
+      - set(name, Concat(["otlp", name], "."))
+
   transform/collision:
     metric_statements:
     - context: datapoint