profiles/monitoring-server: Fetch monitoring targets from json file

profiles/default.nix

@@ -14,6 +14,7 @@
     ./hetzner-cloud
     ./hydra-build-machine
     ./mercury-vm
+    ./monitoring-server
     ./netcup
     ./network-fallback-dhcp
     ./router

profiles/monitoring-server/default.nix

@@ -0,0 +1,91 @@
+{ config, lib, ... }:
+
+with lib;
+
+let
+
+  mkAttrsOfSubmoduleOption = description: submoduleOptions: mkOption {
+    type = with types; attrsOf (submodule { options = submoduleOptions; });
+    default = {};
+    description = description;
+  };
+
+  mkSubmoduleOption = description: submoduleOptions: mkOption {
+    type = types.submodule { options = submoduleOptions; };
+    default = {};
+    description = description;
+  };
+
+  mkProbeOption = description: submoduleOptions: mkSubmoduleOption description ({
+    enable = mkEnableOption "Monitor target using this probe";
+  } // submoduleOptions); 
+
+  mkProtocolsOption = mkOption {
+    type = with types; listOf (enum [ "ipv6" "ipv4" ]);
+    default = [ "ipv6" "ipv4" ];
+    description = "Protocols to retrieve metrics for";
+  };
+
+  mkTargetsListOption = mkOption {
+    type = with types; listOf str;
+    default = [];
+  };
+
+  listContains = searchValue: listToSearch: any (element: element == searchValue) listToSearch;
+
+  targetsForProbe = probeName: condition: attrNames (filterAttrs (targetName: targetConfig:
+      targetConfig.${probeName}.enable == true && (condition targetConfig.${probeName})
+    ) config.profiles.clerie.monitoring-server.targets);
+
+in {
+
+  options.profiles.clerie.monitoring-server = {
+    targets = mkAttrsOfSubmoduleOption "Monitoring targets config" {
+      _comment = mkOption {
+        type = types.str;
+        default = "";
+      };
+      clerie-uberspace = mkProbeOption "This target is a uberspace host managed by clerie" {};
+      http = mkProbeOption "Monitor HTTP" {
+        protocols = mkProtocolsOption;
+      };
+      icmp = mkProbeOption "Monitor HTTP" {
+        protocols = mkProtocolsOption;
+      };
+      synapse = mkProbeOption "Monitor Synapse Matrix server" {};
+    };
+
+    probeTargets = mkSubmoduleOption "Target per probe" {
+      blackbox-http4 = mkTargetsListOption;
+      blackbox-http6 = mkTargetsListOption;
+      blackbox-icmp4 = mkTargetsListOption;
+      blackbox-icmp6 = mkTargetsListOption;
+      node-exporter-uberspace = mkTargetsListOption;
+      blackbox-local-synapse = mkTargetsListOption;
+    };
+  };
+
+  config = {
+
+    profiles.clerie.monitoring-server.probeTargets.blackbox-http4 = targetsForProbe "http" (probeConfig:
+      (listContains "ipv4" probeConfig.protocols)
+    );
+
+    profiles.clerie.monitoring-server.probeTargets.blackbox-http6 = targetsForProbe "http" (probeConfig:
+      (listContains "ipv6" probeConfig.protocols)
+    );
+
+    profiles.clerie.monitoring-server.probeTargets.blackbox-icmp4 = targetsForProbe "icmp" (probeConfig:
+      (listContains "ipv4" probeConfig.protocols)
+    );
+
+    profiles.clerie.monitoring-server.probeTargets.blackbox-icmp6 = targetsForProbe "icmp" (probeConfig:
+      (listContains "ipv6" probeConfig.protocols)
+    );
+
+    profiles.clerie.monitoring-server.probeTargets.node-exporter-uberspace = targetsForProbe "clerie-uberspace" (_: true);
+
+    profiles.clerie.monitoring-server.probeTargets.blackbox-local-synapse = targetsForProbe "synapse" (_: true);
+
+  };
+}