From 0ec97d1e7dc153634cabb0ba2cf7ab9a2b0e6df1 Mon Sep 17 00:00:00 2001
From: Minijackson <minijackson@riseup.net>
Date: Sun, 30 May 2021 19:08:51 +0200
Subject: monitoringServer: init

---
 flake.nix                             | 14 +++++++--
 usecases/server/monitoring-server.nix | 55 +++++++++++++++++++++++++++++++++++
 2 files changed, 66 insertions(+), 3 deletions(-)
 create mode 100644 usecases/server/monitoring-server.nix

diff --git a/flake.nix b/flake.nix
index e2fc4b5..ba8fc24 100644
--- a/flake.nix
+++ b/flake.nix
@@ -79,6 +79,7 @@
         gotifyServer = (import ./usecases/server/gotify-server.nix inputs);
         hydraServer = (import ./usecases/server/hydra-server.nix inputs);
         jellyfin = (import ./usecases/server/jellyfin.nix inputs);
+        monitoringServer = (import ./usecases/server/monitoring-server.nix inputs);
         monitoringTarget = (import ./usecases/server/monitoring-target.nix inputs);
         radicale = (import ./usecases/server/radicale.nix inputs);
         smartd = (import ./usecases/server/smartd.nix inputs);
@@ -177,10 +178,17 @@
               self.nixosModules.usecases.server.gotifyServer
               self.nixosModules.usecases.server.hydraServer
               self.nixosModules.usecases.server.jellyfin
+              self.nixosModules.usecases.server.monitoringServer
               self.nixosModules.usecases.server.radicale
               self.nixosModules.usecases.server.zfs
 
-              {
+              ({ modulesPath, ... }: {
+                imports = [
+                  (modulesPath + "/virtualisation/qemu-vm.nix")
+                ];
+
+                virtualisation.memorySize = 1024;
+
                 # Needed for ZFS
                 networking.hostId = "4e98920d";
 
@@ -192,8 +200,8 @@
                     "testServer:0d5jJjOxIoe6sTr2YKWkQxsM3ZcW+9GAk52yYNVxfYBUxS2nUfzfQk5Jo0OwHnT95bTLXCVNQETGV4m6KHsVCA==";
                 };
 
-                services.jellyfin.allowedPaths = [];
-              }
+                services.jellyfin.allowedPaths = [ ];
+              })
             ];
           };
           testScript = ''
diff --git a/usecases/server/monitoring-server.nix b/usecases/server/monitoring-server.nix
new file mode 100644
index 0000000..823f4f9
--- /dev/null
+++ b/usecases/server/monitoring-server.nix
@@ -0,0 +1,55 @@
+inputs:
+
+{ config, ... }:
+
+{
+  imports = [
+    (import ./monitoring-target.nix inputs)
+  ];
+
+  services.prometheus = {
+    enable = true;
+
+    listenAddress = "127.0.0.1";
+
+    # TODO: for NixOS 21.05
+    extraFlags = [ "--storage.tsdb.retention=15w" ];
+    #retentionTime = "15w";
+
+    scrapeConfigs = [
+      {
+        job_name = "prometheus";
+        static_configs = [
+          { targets = [ "localhost:${toString config.services.prometheus.port}" ]; }
+        ];
+      }
+
+      {
+        job_name = "node_exporter";
+        static_configs = [
+          { targets = [ "localhost:${toString config.services.prometheus.exporters.node.port}" ]; }
+        ];
+      }
+
+      {
+        job_name = "grafana";
+        static_configs = [
+          { targets = [ "localhost:${toString config.services.grafana.port}" ]; }
+        ];
+      }
+    ];
+  };
+
+  services.grafana = {
+    enable = true;
+
+    addr = config.topology.mainVpn.currentNodeIP;
+    port = 3001;
+
+    analytics.reporting.enable = false;
+  };
+
+  networking.firewall.interfaces.${config.topology.mainVpn.interfaceName}.allowedTCPPorts = [
+    config.services.grafana.port
+  ];
+}
-- 
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