defiant: update to nixos-24.05

hosts/defiant/services/monitoring/loki.nix

@@ -51,7 +51,6 @@ in {
         boltdb_shipper = {
           active_index_directory = "${saveDirectory}/boltdb-shipper-index";
           cache_location = "${saveDirectory}/boltdb-shipper-cache";
-          shared_store = "filesystem";
           cache_ttl = "24h";
         };
         filesystem = {
@@ -60,14 +59,13 @@ in {
       };
 
       limits_config = {
-        enforce_metric_name = false;
+        allow_structured_metadata = false;
         reject_old_samples = true;
         reject_old_samples_max_age = "72h";
       };
 
       compactor = {
         working_directory = "${saveDirectory}/compactor";
-        shared_store = "filesystem";
       };
     };
   };

hosts/defiant/services/monitoring/snmp-exporter.nix

@@ -1,20 +1,9 @@
 { config, pkgs, ... }:
 
 {
-  environment.systemPackages = [
-    pkgs.prometheus-snmp-exporter
-  ];
-
-  systemd.services.prometheus-snmp-exporter = {
+  services.prometheus.exporters.snmp = {
     enable = true;
-    description = "Gather data from SNMP devices and expose them as Prometheus metrics";
-    unitConfig = {
-      Type = "simple";
-    };
-    serviceConfig = {
-      ExecStart = "${pkgs.prometheus-snmp-exporter}/bin/snmp_exporter --config.file='/tank/services/metrics/prometheus/snmp.yml'";
-      # snmp.yml = https://github.com/prometheus/snmp_exporter/blob/main/snmp.yml + https://global.download.synology.com/download/Document/Software/DeveloperGuide/Firmware/DSM/All/enu/Synology_DiskStation_MIB_Guide.pdf
-    };
-    wantedBy = [ "multi-user.target" ];
+    configurationPath = "/tank/services/metrics/prometheus/snmp.yml";
+    # snmp.yml = https://github.com/prometheus/snmp_exporter/blob/main/snmp.yml + https://global.download.synology.com/download/Document/Software/DeveloperGuide/Firmware/DSM/All/enu/Synology_DiskStation_MIB_Guide.pdf
   };
 }