Rename modules directory system to nixos

2026-03-22 16:39:07 +01:00 · 2026-02-26 21:11:45 +01:00 · 2026-02-26 21:11:45 +01:00 · 1c1b9221fc
commit 1c1b9221fc
parent 653a6f310b
48 changed files with 1 additions and 1 deletions
--- a/modules/nixos/services/alloy.nix
+++ b/modules/nixos/services/alloy.nix
@ -0,0 +1,152 @@
+{ config, lib, ... }:
+let
+  cfg = config.custom.services.alloy;
+in
+{
+  options.custom.services.alloy = {
+    enable = lib.mkEnableOption "";
+    domain = lib.mkOption {
+      type = lib.types.nonEmptyStr;
+      default = "";
+    };
+    port = lib.mkOption {
+      type = lib.types.port;
+      default = 12345;
+    };
+    metricsEndpoint = lib.mkOption {
+      type = lib.types.nonEmptyStr;
+      default = "https://metrics.${config.custom.networking.overlay.domain}/prometheus/api/v1/write";
+    };
+    logsEndpoint = lib.mkOption {
+      type = lib.types.nonEmptyStr;
+      default = "https://logs.${config.custom.networking.overlay.domain}/insert/loki/api/v1/push";
+    };
+    collect = {
+      metrics = {
+        system = lib.mkEnableOption "" // {
+          default = true;
+        };
+        victorialogs = lib.mkEnableOption "" // {
+          default = config.services.victorialogs.enable;
+        };
+        caddy = lib.mkEnableOption "" // {
+          default = config.services.caddy.enable;
+        };
+      };
+      logs.openssh = lib.mkEnableOption "" // {
+        default = config.services.openssh.enable;
+      };
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    assertions =
+      let
+        metricsAssertions =
+          cfg.collect.metrics
+          |> lib.attrNames
+          |> lib.filter (name: name != "system")
+          |> lib.map (name: {
+            assertion = cfg.collect.metrics.${name} -> config.services.${name}.enable;
+            message = "Alloy cannot collect `${name}` metrics without the `${name}` service";
+          });
+        logsAssertions =
+          cfg.collect.logs
+          |> lib.attrNames
+          |> lib.map (name: {
+            assertion = cfg.collect.logs.${name} -> config.services.${name}.enable;
+            message = "Alloy cannot collect '${name}' logs without the '${name}' service";
+          });
+      in
+      metricsAssertions ++ logsAssertions;
+
+    services.alloy = {
+      enable = true;
+      extraFlags = [
+        "--server.http.listen-addr=localhost:${toString cfg.port}"
+        "--disable-reporting"
+      ];
+    };
+
+    environment.etc =
+      let
+        isTrue = x: x;
+        anyIsTrue = attrs: attrs |> lib.attrValues |> lib.any isTrue;
+      in
+      {
+        "alloy/metrics-endpoint.alloy" = {
+          enable = cfg.collect.metrics |> anyIsTrue;
+          text = ''
+            prometheus.remote_write "default" {
+              endpoint {
+                url = "${cfg.metricsEndpoint}"
+              }
+            }
+          '';
+        };
+        "alloy/logs-endpoint.alloy" = {
+          enable = cfg.collect.logs |> anyIsTrue;
+          text = ''
+            loki.write "default" {
+              endpoint {
+                url = "${cfg.logsEndpoint}"
+              }
+            }
+          '';
+        };
+        "alloy/system-metrics.alloy" = {
+          enable = cfg.collect.metrics.system;
+          text = ''
+            prometheus.exporter.unix "default" {
+              enable_collectors = ["systemd"]
+            }
+
+            prometheus.scrape "node_exporter" {
+              targets         = prometheus.exporter.unix.default.targets
+              forward_to      = [prometheus.remote_write.default.receiver]
+              scrape_interval = "15s"
+            }
+          '';
+        };
+        "alloy/victorialogs-metrics.alloy" = {
+          enable = cfg.collect.metrics.victorialogs;
+          text = ''
+            prometheus.scrape "victorialogs" {
+              targets = [{
+                __address__ = "localhost:${toString config.custom.web-services.victorialogs.port}",
+                job         = "victorialogs",
+                instance    = constants.hostname,
+              }]
+              forward_to      = [prometheus.remote_write.default.receiver]
+              scrape_interval = "15s"
+            }
+          '';
+        };
+        "alloy/caddy-metrics.alloy" = {
+          enable = cfg.collect.metrics.caddy;
+          text = ''
+            prometheus.scrape "caddy" {
+              targets = [{
+                __address__ = "localhost:${toString config.custom.services.caddy.metricsPort}",
+                job         = "caddy",
+                instance    = constants.hostname,
+              }]
+              forward_to      = [prometheus.remote_write.default.receiver]
+              scrape_interval = "15s"
+            }
+          '';
+        };
+        "alloy/sshd-logs.alloy" = {
+          enable = cfg.collect.logs.openssh;
+          text = ''
+            loki.source.journal "sshd" {
+              matches    = "_SYSTEMD_UNIT=sshd.service"
+              forward_to = [loki.write.default.receiver]
+            }
+          '';
+        };
+      };
+
+    custom.services.caddy.virtualHosts.${cfg.domain}.port = cfg.port;
+  };
+}