From 1dc04e92b29c3ba2135bd893dc1d9ab22f9233cd Mon Sep 17 00:00:00 2001
From: L-Nafaryus <l.nafaryus@gmail.com>
Date: Thu, 10 Oct 2024 12:43:33 +0500
Subject: [PATCH] catarina: metrics

---
 nixosConfigurations/catarina/default.nix      |   1 +
 .../catarina/services/gitea.nix               |   4 +
 .../catarina/services/metrics.nix             | 123 ++++++++++++++++++
 3 files changed, 128 insertions(+)
 create mode 100644 nixosConfigurations/catarina/services/metrics.nix

diff --git a/nixosConfigurations/catarina/default.nix b/nixosConfigurations/catarina/default.nix
index de4dae8..f5430a5 100644
--- a/nixosConfigurations/catarina/default.nix
+++ b/nixosConfigurations/catarina/default.nix
@@ -14,6 +14,7 @@
     ./services/gitea.nix
     ./services/radio.nix
     ./services/matrix.nix
+    ./services/metrics.nix
   ];
 
   # Nix settings
diff --git a/nixosConfigurations/catarina/services/gitea.nix b/nixosConfigurations/catarina/services/gitea.nix
index 258639c..992a698 100644
--- a/nixosConfigurations/catarina/services/gitea.nix
+++ b/nixosConfigurations/catarina/services/gitea.nix
@@ -55,6 +55,10 @@
       indexer = {
         REPO_INDEXER_ENABLED = true;
       };
+
+      metrics = {
+        ENABLED = true;
+      };
     };
 
     mailerPasswordFile = config.sops.secrets."gitea/mail".path;
diff --git a/nixosConfigurations/catarina/services/metrics.nix b/nixosConfigurations/catarina/services/metrics.nix
new file mode 100644
index 0000000..229f8ab
--- /dev/null
+++ b/nixosConfigurations/catarina/services/metrics.nix
@@ -0,0 +1,123 @@
+{
+  config,
+  pkgs,
+  ...
+}: {
+  services.grafana = {
+    enable = true;
+    settings.server = {
+      domain = "grafana.elnafo.ru";
+      http_port = 2342;
+      http_addr = "127.0.0.1";
+    };
+  };
+
+  services.prometheus = {
+    enable = true;
+    port = 9090;
+    globalConfig.scrape_interval = "10s"; # "1m"
+
+    exporters = {
+      node = {
+        enable = true;
+        enabledCollectors = ["systemd"];
+        port = 9092;
+      };
+    };
+    scrapeConfigs = [
+      {
+        job_name = "catarina";
+        static_configs = [
+          {
+            targets = ["127.0.0.1:${toString config.services.prometheus.exporters.node.port}"];
+          }
+        ];
+      }
+    ];
+  };
+
+  services.loki = {
+    enable = true;
+    configuration = {
+      auth_enabled = false;
+      server = {
+        http_listen_port = 3100;
+      };
+      common = {
+        ring = {
+          instance_addr = "127.0.0.1";
+          kvstore = {
+            store = "inmemory";
+          };
+        };
+        replication_factor = 1;
+        path_prefix = "/tmp/loki";
+      };
+      schema_config = {
+        configs = [
+          {
+            from = "2020-05-15";
+            store = "tsdb";
+            object_store = "filesystem";
+            schema = "v13";
+            index = {
+              prefix = "index_";
+              period = "24h";
+            };
+          }
+        ];
+      };
+      storage_config = {
+        filesystem = {
+          directory = "/tmp/loki/chunks";
+        };
+      };
+    };
+  };
+
+  services.promtail = {
+    enable = true;
+    configuration = {
+      server = {
+        http_listen_port = 3101;
+        grpc_listen_port = 0;
+      };
+      clients = [
+        {
+          url = "http://127.0.0.1:3100/loki/api/v1/push";
+        }
+      ];
+      scrape_configs = [
+        {
+          job_name = "journal";
+          journal = {
+            max_age = "12h";
+            labels = {
+              job = "systemd-journal";
+              host = "catarina";
+            };
+          };
+          relabel_configs = [
+            {
+              source_labels = [
+                "__journal__systemd_unit"
+              ];
+              target_label = "unit";
+            }
+          ];
+        }
+      ];
+    };
+  };
+
+  services.nginx = {
+    virtualHosts."grafana.elnafo.ru" = {
+      forceSSL = true;
+      useACMEHost = "elnafo.ru";
+      locations."/" = {
+        proxyPass = "http://127.0.0.1:${toString config.services.grafana.port}";
+        proxyWebsockets = true;
+      };
+    };
+  };
+}