From 9f3e7b698a33ebaff3577b076f38fbb7ad7ae6fe Mon Sep 17 00:00:00 2001
From: Ingolf Wagner <contact@ingolf-wagner.de>
Date: Tue, 14 May 2024 17:06:38 +0200
Subject: [PATCH] configure opentelemetry on orbi

---
 nixos/machines/orbi/configuration.nix         |  5 +-
 nixos/machines/orbi/system-opentelemetry.nix  | 51 +++++++++++++++++++
 .../{prometheus.nix => system-prometheus.nix} |  0
 .../{telegraf.nix => system-telegraf.nix}     | 11 ++--
 4 files changed, 62 insertions(+), 5 deletions(-)
 create mode 100644 nixos/machines/orbi/system-opentelemetry.nix
 rename nixos/machines/orbi/{prometheus.nix => system-prometheus.nix} (100%)
 rename nixos/machines/orbi/{telegraf.nix => system-telegraf.nix} (73%)

diff --git a/nixos/machines/orbi/configuration.nix b/nixos/machines/orbi/configuration.nix
index 9a076d9..884718f 100644
--- a/nixos/machines/orbi/configuration.nix
+++ b/nixos/machines/orbi/configuration.nix
@@ -40,9 +40,10 @@
     # ---------
     #./loki.nix
     #./loki-promtail.nix
-    ##./prometheus.nix
     #./grafana.nix
-    ./telegraf.nix
+    ./system-telegraf.nix
+    ./system-opentelemetry.nix
+    #./system-prometheus.nix
 
     #./cache.nix
   ];
diff --git a/nixos/machines/orbi/system-opentelemetry.nix b/nixos/machines/orbi/system-opentelemetry.nix
new file mode 100644
index 0000000..6b389e1
--- /dev/null
+++ b/nixos/machines/orbi/system-opentelemetry.nix
@@ -0,0 +1,51 @@
+{ pkgs, ... }:
+{
+  services.opentelemetry-collector = {
+    enable = true;
+    package = pkgs.unstable.opentelemetry-collector-contrib;
+    settings = {
+      receivers = {
+        # provide a influxdb sink
+        influxdb = {
+          endpoint = "127.0.0.1:8088";
+        };
+        # scrape opentelemetry-colectors metrics
+        prometheus.config.scrape_configs = [
+          {
+            job_name = "netdata";
+            scrape_interval = "10s";
+            metrics_path = "/api/v1/allmetrics";
+            params.format = [ "prometheus" ];
+            static_configs = [{ targets = [ "127.0.0.1:19999" ]; }];
+          }
+          {
+            job_name = "otelcol";
+            scrape_interval = "10s";
+            static_configs = [{ targets = [ "127.0.0.1:8100" ]; }];
+            metric_relabel_configs = [
+              {
+                source_labels = [ "__name__" ];
+                regex = ".*grpc_io.*";
+                action = "drop";
+              }
+            ];
+          }
+        ];
+      };
+      exporters = {
+        # provide prometheus sink under `/metrics` to 
+        prometheus = {
+          endpoint = "127.0.0.1:8090";
+        };
+      };
+      service = {
+        pipelines.metrics = {
+          receivers = [ "influxdb" "prometheus" ];
+          exporters = [ "prometheus" ];
+        };
+        # open telemetries own metrics?
+        telemetry.metrics.address = "0.0.0.0:8100";
+      };
+    };
+  };
+}
diff --git a/nixos/machines/orbi/prometheus.nix b/nixos/machines/orbi/system-prometheus.nix
similarity index 100%
rename from nixos/machines/orbi/prometheus.nix
rename to nixos/machines/orbi/system-prometheus.nix
diff --git a/nixos/machines/orbi/telegraf.nix b/nixos/machines/orbi/system-telegraf.nix
similarity index 73%
rename from nixos/machines/orbi/telegraf.nix
rename to nixos/machines/orbi/system-telegraf.nix
index 5e7c662..f6e32ff 100644
--- a/nixos/machines/orbi/telegraf.nix
+++ b/nixos/machines/orbi/system-telegraf.nix
@@ -2,9 +2,14 @@
   services.telegraf = {
     enable = true;
     extraConfig = {
-      outputs.prometheus_client = {
-        listen = ":9273";
-        metric_version = 2;
+      outputs = {
+        prometheus_client = {
+          listen = ":9273";
+          metric_version = 2;
+        };
+        influxdb_v2 = {
+          urls = [ "http://127.0.0.1:8088" ];
+        };
       };
       # https://github.com/influxdata/telegraf/tree/master/plugins/inputs < all them plugins
       inputs = {