sagittarius: add prometheus otel exporter

1 files changed, 17 insertions, 1 deletions

diff --git a/hosts/sagittarius/web/observability.nix b/hosts/sagittarius/web/observability.nix
index 956245c..6a2e58a 100644
--- a/hosts/sagittarius/web/observability.nix
+++ b/hosts/sagittarius/web/observability.nix
@@ -1,4 +1,7 @@
 { ... }:
+let
+  otel-prometheus-exporter-port = 4316;
+in
 {
   services.opentelemetry-collector = {
     enable = true;
@@ -28,11 +31,20 @@
           limit_mib = 2500;
           spike_limit_mib = 500;
         };
+        batch = {
+          timeout = "10s";
+          send_batch_size = 100;
+        };
       };
       exporters = {
         debug = {
           verbosity = "detailed";
         };
+        prometheus = {
+          endpoint = "localhost:${toString otel-prometheus-exporter-port}";
+          send_timestamps = true;
+          enable_open_metrics = true;
+        };
       };
       service = {
         extensions = [ ];
@@ -46,7 +58,10 @@
               "otlp"
               "hostmetrics"
             ];
-            exporters = [ "debug" ];
+            exporters = [
+              "debug"
+              "prometheus"
+            ];
           };
           logs = {
             receivers = [ "otlp" ];
@@ -56,4 +71,5 @@
       };
     };
   };
+
 }