deploy k3s

nixos/hosts/olympus/kubernetes/configuration.nix

@@ -1,39 +1,15 @@
-# Edit this configuration file to define what should be installed on
-# your system.  Help is available in the configuration.nix(5) man page
-# and in the NixOS manual (accessible by running ‘nixos-help’).
-
-{ config, pkgs, hosts, ... }:
-let
-  kubeMasterIP = config.deployment.targetHost; # TODO: set more reliably
-  kubeMasterHostname =
-    "${config.networking.hostName}.${config.networking.domain}";
-  kubeMasterAPIServerPort = 6443;
-in {
-  # resolve master hostname always
-  networking.extraHosts = "${kubeMasterIP} ${kubeMasterHostname}";
-
+{ config, pkgs, hosts, ... }: {
   # packages for administration tasks
-  environment.systemPackages = with pkgs; [ kompose kubectl kubernetes k9s ];
+  environment.systemPackages = with pkgs; [ kompose kubectl k9s k3s ];
 
-  # Kubernetes itself
-  services.kubernetes = {
-    roles = [ "master" "node" ];
-    masterAddress = kubeMasterHostname;
-    apiserverAddress =
-      "https://${kubeMasterHostname}:${toString kubeMasterAPIServerPort}";
-    easyCerts = true;
-    apiserver = {
-      securePort = kubeMasterAPIServerPort;
-      advertiseAddress = kubeMasterIP;
-    };
-
-    # use coredns
-    addons.dns.enable = true;
-
-    # needed if you use swap
-    kubelet.extraOpts = "--fail-swap-on=false";
+  services.k3s = {
+    enable = true;
+    role = "server";
+    extraFlags = toString [
+      # "--kubelet-arg=v=4" # Optionally add additional args to k3s
+      "--cluster-cidr 10.24.0.0/16"
+    ];
   };
-
   # This value determines the NixOS release from which the default
   # settings for stateful data, like file locations and database versions
   # on your system were taken. It‘s perfectly fine and recommended to leave
@@ -42,5 +18,5 @@ in {
   # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
   system.stateVersion = "23.05"; # Did you read the comment?
 
-  networking.firewall.allowedTCPPorts = [ ];
+  networking.firewall.enable = false;
 }