1 files changed, 192 insertions, 0 deletions
diff --git a/modules/by-name/mo/monitoring/components/prometheus.nix b/modules/by-name/mo/monitoring/components/prometheus.nix
new file mode 100644
index 0000000..468ece3
--- /dev/null
+++ b/modules/by-name/mo/monitoring/components/prometheus.nix
@@ -0,0 +1,192 @@
+{
+  lib,
+  config,
+  nixLib,
+  ...
+}: let
+  cfg = config.vhack.monitoring.prometheus;
+
+  commonLabels = {
+    hostname = config.networking.hostName;
+    inherit (config.vhack.monitoring.grafana) fqdn;
+  };
+
+  prom_cfg = config.services.prometheus;
+in {
+  options.vhack.monitoring.prometheus = {
+    enable = lib.mkEnableOption "prometheus";
+
+    port = lib.mkOption {
+      type = lib.types.port;
+      description = "Port where Prometheus listens to HTTP requests.";
+      default = 3001;
+    };
+
+    sources = lib.mkOption {
+      type = lib.types.listOf (lib.types.submodule {
+        options = {
+          name = lib.mkOption {
+            type = lib.types.str;
+          };
+          target = lib.mkOption {
+            type = lib.types.str;
+          };
+          extra = lib.mkOption {
+            type = lib.types.attrsOf lib.types.anything;
+          };
+        };
+      });
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    vhack = {
+      nginx.enable = true;
+      monitoring.prometheus.sources = [
+        {
+          name = "node";
+          target = "127.0.0.1:${toString prom_cfg.exporters.node.port}";
+        }
+        {
+          name = "smartctl";
+          target = "127.0.0.1:${toString prom_cfg.exporters.smartctl.port}";
+        }
+        {
+          name = "prometheus_internal";
+          target = "127.0.0.1:${toString prom_cfg.port}";
+        }
+        {
+          name = "systemd";
+          target = "127.0.0.1:${toString prom_cfg.exporters.systemd.port}";
+        }
+        {
+          name = "netdata";
+          target = "127.0.0.1:19999";
+          extra = {
+            metrics_path = "/api/v1/allmetrics";
+            params.format = ["prometheus"];
+            honor_labels = true;
+          };
+        }
+      ];
+    };
+
+    services = {
+      prometheus = {
+        enable = true;
+        inherit (cfg) port;
+
+        globalConfig = {
+          scrape_interval = "15s";
+        };
+
+        scrapeConfigs = builtins.map (attr:
+          nixLib.warnMerge {
+            job_name = attr.name;
+            static_configs = [
+              {
+                targets = [attr.target];
+                labels = commonLabels;
+              }
+            ];
+          }
+          attr.extra "prometheus scrapeConfig")
+        cfg.sources;
+        # ++ (lib.optional (builtins.length (lib.attrNames config.services.redis.servers) > 0) {
+        #     job_name = "redis";
+        #     static_configs = [
+        #       {
+        #         targets = ["127.0.0.1:${toString config.services.prometheus.exporters.redis.port}"];
+        #       }
+        #     ];
+        # }) ++ (lib.optional (builtins.length (lib.attrNames config.services.openvpn.servers) > 0) {
+        #     job_name = "openvpn";
+        #     static_configs = [
+        #       {
+        #         targets = ["127.0.0.1:${toString config.services.prometheus.exporters.openvpn.port}"];
+        #       }
+        #     ];
+        # })
+        # ++ (lib.optional config.services.dnsmasq.enable {
+        #   job_name = "dnsmasq";
+        #   static_configs = [
+        #     {
+        #       targets = ["127.0.0.1:${toString config.services.prometheus.exporters.dnsmasq.port}"];
+        #       labels = commonLabels;
+        #     }
+        #   ];
+        # });
+
+        exporters = {
+          node = {
+            enable = true;
+            # https://github.com/prometheus/node_exporter#collectors
+            enabledCollectors = [
+              "arp"
+              "cpu"
+              "cpufreq"
+              "diskstats"
+              "dmi"
+              "edac"
+              "entropy"
+              "filefd"
+              "filesystem"
+              "hwmon"
+              "loadavg"
+              "meminfo"
+              "netclass"
+              "netdev"
+              "netstat"
+              "nvme"
+              "os"
+              "pressure"
+              "rapl"
+              "schedstat"
+              "stat"
+              "thermal_zone"
+              "time"
+              "uname"
+              "vmstat"
+              "zfs"
+
+              # Disabled by default
+              "cgroups"
+              "drm"
+              "ethtool"
+              "logind"
+              "wifi"
+            ];
+            port = 9112;
+            listenAddress = "127.0.0.1";
+          };
+          smartctl = {
+            enable = true;
+            port = 9115;
+            listenAddress = "127.0.0.1";
+          };
+          # services.prometheus.exporters.redis = lib.mkIf (builtins.length (lib.attrNames config.services.redis.servers) > 0) {
+          #   enable = true;
+          #   port = 9119;
+          #   listenAddress = "127.0.0.1";
+          # };
+          # services.prometheus.exporters.openvpn = lib.mkIf (builtins.length (lib.attrNames config.services.openvpn.servers) > 0) {
+          #   enable = true;
+          #   port = 9121;
+          #   listenAddress = "127.0.0.1";
+          #   statusPaths = lib.mapAttrsToList (name: _config: "/tmp/openvpn/${name}.status") config.services.openvpn.servers;
+          # };
+          # dnsmasq = lib.mkIf config.services.dnsmasq.enable {
+          #   enable = true;
+          #   port = 9211;
+          #   listenAddress = "127.0.0.1";
+          # };
+          systemd = {
+            enable = true;
+            port = 9116;
+            listenAddress = "127.0.0.1";
+          };
+        };
+      };
+    };
+  };
+}