initial set up for k3s service

clanServices/k3s/server.nix

@@ -0,0 +1,55 @@
+{ config, lib, pkgs, ... }:
+{
+  config = {
+    clan.core.vars.generators = {
+      k3s-ip = {
+        share = true;
+        files.ip_v6 = {
+          deploy = false;
+          secret = false;
+        };
+        files.ip_v4 = {
+          deploy = false;
+          secret = false;
+        };
+        script = ''
+          echo "::1" > "$out/ip_v6"
+          echo "127.0.0.1" > "$out/ip_v4"
+        '';
+      };
+
+      k3s-token = {
+        share = true;
+        files.token = {
+          deploy = false;
+          secret = true;
+        };
+        runtimeInputs = with pkgs; [ pwgen ];
+        script = ''
+          pwgen 50 1 > "$out/token"
+        '';
+      };
+    };
+
+    networking.firewall = {
+      allowedTCPPorts = [
+        6443 # k3s: required so that pods can reach the API server (running on port 6443 by default)
+        2379 # k3s, etcd clients: required if using a "High Availability Embedded etcd" configuration
+        2380 # k3s, etcd peers: required if using a "High Availability Embedded etcd" configuration
+      ];
+
+      allowedUDPPorts = [
+        8472 # k3s, flannel: required if using multi-node for inter-node networking
+      ];
+    };
+
+    services = {
+      k3s = {
+        enable = true;
+        role = "server";
+        token = config.clan.core.vars.generators.k3s-token.token.value;
+        clusterInit = true;
+      };
+    };
+  };
+}