Merge pull request 'zerotier-static-peers: init module' (#1400) from a-kenji-modules/init/static-zerotier-hosts into main

clanModules/flake-module.nix

@@ -19,6 +19,7 @@
     thelounge = ./thelounge;
     user-password = ./user-password;
     xfce = ./xfce;
+    zerotier-static-peers = ./zerotier-static-peers;
     zt-tcp-relay = ./zt-tcp-relay;
   };
 }

clanModules/zerotier-static-peers/README.md

@@ -0,0 +1,5 @@
+Statically configure the `zerotier` peers of a clan network.
+---
+Statically configure the `zerotier` peers of a clan network.
+
+Requires a machine, that is the zerotier controller configured in the network.

clanModules/zerotier-static-peers/default.nix

@@ -0,0 +1,71 @@
+{
+  lib,
+  config,
+  pkgs,
+  inputs,
+  ...
+}:
+let
+  clanDir = config.clanCore.clanDir;
+  machineDir = clanDir + "/machines/";
+  machinesFileSet = builtins.readDir machineDir;
+  machines = lib.mapAttrsToList (name: _: name) machinesFileSet;
+
+  zerotierNetworkIdPath = machines: machineDir + machines + "/facts/zerotier-network-id";
+  networkIdsUnchecked = builtins.map (
+    machine:
+    let
+      fullPath = zerotierNetworkIdPath machine;
+    in
+    if builtins.pathExists fullPath then builtins.readFile fullPath else null
+  ) machines;
+  networkIds = lib.filter (machine: machine != null) networkIdsUnchecked;
+  networkId = builtins.elemAt networkIds 0;
+in
+#TODO:trace on multiple found network-ids
+#TODO:trace on no single found networkId
+{
+  options.clan.zerotier-static-peers = {
+    excludeHosts = lib.mkOption {
+      type = lib.types.listOf lib.types.str;
+      default = [ config.clanCore.machineName ];
+      description = "Hosts that should be excluded";
+    };
+  };
+
+  config.systemd.services.zerotier-static-peers-autoaccept =
+    let
+      machines = builtins.readDir machineDir;
+      zerotierIpMachinePath = machines: machineDir + machines + "/facts/zerotier-ip";
+      filteredMachines = lib.filterAttrs (
+        name: _: !(lib.elem name config.clan.static-hosts.excludeHosts)
+      ) machines;
+      hosts = lib.mapAttrsToList (host: _: host) (
+        lib.mapAttrs' (
+          machine: _:
+          let
+            fullPath = zerotierIpMachinePath machine;
+          in
+          if builtins.pathExists fullPath then
+            lib.nameValuePair (builtins.readFile fullPath) [ machine ]
+          else
+            null
+        ) filteredMachines
+      );
+    in
+    lib.mkIf (config.clan.networking.zerotier.controller.enable) {
+      wantedBy = [ "multi-user.target" ];
+      after = [ "zerotierone.service" ];
+      path = [ pkgs.zerotierone ];
+      serviceConfig.ExecStart = pkgs.writeScript "static-zerotier-peers-autoaccept" ''
+        #!/bin/sh
+        ${lib.concatMapStringsSep "\n" (host: ''
+          ${
+            inputs.clan-core.packages.${pkgs.system}.zerotier-members
+          }/bin/zerotier-members allow --member-ip ${host}
+        '') hosts}
+      '';
+    };
+
+  config.clan.networking.zerotier.networkId = lib.mkDefault networkId;
+}

docs/mkdocs.yml

@@ -66,6 +66,7 @@ nav:
           - reference/clanModules/thelounge.md
           - reference/clanModules/user-password.md
           - reference/clanModules/xfce.md
+          - reference/clanModules/zerotier-static-peers.md
           - reference/clanModules/zt-tcp-relay.md
       - CLI:
           - reference/cli/index.md