2022-12-17

1 files changed, 49 insertions, 0 deletions

diff --git a/modules/nixos/prometheus.nix b/modules/nixos/prometheus.nix
new file mode 100644
index 0000000..a75c151
--- /dev/null
+++ b/modules/nixos/prometheus.nix
@@ -0,0 +1,49 @@
+{
+  config,
+  lib,
+  ...
+}:
+with lib; let
+  cfg = config.nixfiles.modules.prometheus;
+in {
+  options.nixfiles.modules.prometheus = {
+    enable = mkEnableOption "Prometheus";
+
+    port = mkOption {
+      description = "Port.";
+      type = with types; port;
+      default = 30111;
+    };
+
+    domain = mkOption {
+      description = "Domain name sans protocol scheme.";
+      type = with types; str;
+      default = "prometheus.${config.networking.domain}";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    nixfiles.modules.nginx = with cfg; {
+      enable = true;
+      upstreams.prometheus.servers."127.0.0.1:${toString cfg.port}" = {};
+      virtualHosts.${domain} = {
+        locations."/".proxyPass = "http://prometheus";
+        extraConfig = nginxInternalOnly;
+      };
+    };
+
+    services.prometheus = with cfg; {
+      enable = true;
+
+      listenAddress = "127.0.0.1";
+      inherit port;
+
+      extraFlags = [
+        "--web.external-url=https://${domain}"
+        "--storage.tsdb.retention.size=50GB"
+        "--storage.tsdb.retention.time=1y"
+        "--storage.tsdb.wal-compression"
+      ];
+    };
+  };
+}