add metrics server to semita

hosts/common/optional/nixos-containers/docker.nix

@@ -175,6 +175,16 @@ in {
         };
       };
 
+      services.prometheus = {
+        exporters = {
+          node = {
+            enable = true;
+            enabledCollectors = ["systemd"];
+            openFirewall = true;
+          };
+        };
+      };
+
       services.openssh = {
         enable = true;
         settings.PasswordAuthentication = false;

hosts/common/optional/nixos-containers/metrics-server.nix

@@ -1,16 +1,16 @@
 {
   pkgs,
   lib,
-  inputs,
   configVars,
   ...
 }: let
   containerName = "metrics-server";
   containerIp = configVars.networking.addresses.metrics-server.ip;
+  dockerContainerIp = configVars.networking.addresses.docker.ip;
+  semitaIp = configVars.networking.addresses.semita.ip;
   gatewayIp = configVars.networking.addresses.gateway.ip;
   metricsServerContainerData = configVars.locations.metricsServerContainerData;
   pubKeys = lib.filesystem.listFilesRecursive ../../users/keys;
-  arion = inputs.arion;
 in {
   networking.nat.enable = true;
   networking.nat.internalInterfaces = ["ve-+"];
@@ -64,6 +64,7 @@ in {
           enable = true;
           allowedTCPPorts = [
             config.services.prometheus.port
+            config.services.grafana.port
           ];
         };
         useHostResolvConf = lib.mkForce false;
@@ -82,19 +83,34 @@ in {
       services.prometheus = {
         enable = true;
         port = 9001;
+        scrapeConfigs = [
+          {
+            job_name = "node_exporter";
+            static_configs = [
+              {
+                targets = [
+                  "${dockerContainerIp}:9100"
+                  "${semitaIp}:9100"
+                ];
+              }
+            ];
+          }
+        ];
       };
 
       services.grafana = {
         enable = true;
-        domain = "grafana.hm";
         port = 2342;
-        addr = "127.0.0.1";
+        addr = "0.0.0.0";
       };
 
-      services.nginx.virtualHosts.${config.services.grafana.domain} = {
+      services.prometheus = {
-        locations."/" = {
+        exporters = {
-          proxyPass = "http://127.0.0.1:${toString config.services.grafana.port}";
+          node = {
-          proxyWebsockets = true;
+            enable = true;
+            enabledCollectors = ["systemd"];
+            port = 9002;
+          };
         };
       };
 

hosts/semita/default.nix

@@ -58,7 +58,7 @@ in {
     ../common/optional/nfs-mounts/media.nix
     ../common/optional/nfs-mounts/homeshare.nix
     ../common/optional/nfs-mounts/photos.nix
-    
+
     # nixos-containers
     ../common/optional/nixos-containers/nix-bitcoin.nix
     ../common/optional/nixos-containers/postgres.nix
@@ -95,13 +95,23 @@ in {
       dpi = 144;
       upscaleDefaultCursor = true;
     };
-  # enable oom killer when system ram drops below 5% free
+    # enable oom killer when system ram drops below 5% free
     earlyoom = {
       enable = true;
       freeMemThreshold = 5; # <%5 free
     };
   };
 
+  services.prometheus = {
+    exporters = {
+      node = {
+        enable = true;
+        enabledCollectors = ["systemd"];
+        openFirewall = true;
+      };
+    };
+  };
+
   system.services.nixosAutoUpgrade = {
     enable = true;
     persistent = true;