hcloud: add mgit.hcloud.auto-network option

mgit-at · Jul 12, 2024 · 042f28e · 042f28e
1 parent addb934
commit 042f28e
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Showing 3 changed files with 41 additions and 18 deletions.
diff --git a/os/hcloud/configuration.nix b/os/hcloud/configuration.nix
@@ -1,4 +1,4 @@
-disko: { inputs, modulesPath, ... }:
+disko: { inputs, modulesPath, config, lib, ... }: with lib;
 {
   imports = [
     (modulesPath + "/profiles/qemu-guest.nix")
@@ -10,10 +10,37 @@ disko: { inputs, modulesPath, ... }:
     })
   ];
 
-  # boot.loader.grub.device = "/dev/sda";
-  boot.initrd.availableKernelModules = [ "ata_piix" "uhci_hcd" "xen_blkfront" "vmw_pvscsi" ];
-  boot.initrd.kernelModules = [ "nvme" ];
+  options = {
+    mgit.hcloud.auto-network = mkOption {
+      type = types.nullOr types.str;
+      default = null;
+      description = "Hetzner cloud network autosetup. Specifiy IPv6 address here to enable.";
+    };
+  };
 
-  boot.tmp.cleanOnBoot = true;
-  boot.growPartition = true;
+  config = mkMerge [
+    {
+      # boot.loader.grub.device = "/dev/sda";
+      boot.initrd.availableKernelModules = [ "ata_piix" "uhci_hcd" "xen_blkfront" "vmw_pvscsi" ];
+      boot.initrd.kernelModules = [ "nvme" ];
+
+      boot.tmp.cleanOnBoot = true;
+      boot.growPartition = true;
+    }
+    (mkIf (config.mgit.hcloud.auto-network != null) {
+      networking.usePredictableInterfaceNames = false;
+
+      systemd.network.enable = true;
+      systemd.network.networks."10-wan" = {
+        matchConfig.Name = "eth0";
+        networkConfig.DHCP = "ipv4";
+        address = [
+          "${config.mgit.hcloud.auto-network}"
+        ];
+        routes = [
+          { routeConfig.Gateway = "fe80::1"; }
+        ];
+      };
+    })
+  ];
 }
diff --git a/template/nixos/hosts/example-hcloud/default.nix b/template/nixos/hosts/example-hcloud/default.nix
@@ -8,18 +8,8 @@ with lib;
     inputs.common.nixosModules.hcloud_base
   ];
 
-  systemd.network.enable = true;
-  systemd.network.networks."10-wan" = {
-    matchConfig.Name = "ens3"; # either ens3 (amd64) or enp1s0 (arm64)
-    networkConfig.DHCP = "ipv4";
-    address = [
-      # replace this address with the one assigned to your instance
-      "2a01:4f8:aaaa:bbbb::2/64"
-    ];
-    routes = [
-      { routeConfig.Gateway = "fe80::1"; }
-    ];
-  };
+  # replace this address with the one assigned to your instance
+  mgit.hcloud.auto-network = "2a01:4f8:aaaa:bbbb::2/64";
 
   networking.hostName = "example-hcloud";
   system.stateVersion = "24.05";

diff --git a/template/nixos/hosts/example-physical/default.nix b/template/nixos/hosts/example-physical/default.nix
@@ -17,15 +17,20 @@ with lib;
     })
   ];
 
+  # Use this to rename enpXXX back to eth0 (optional):
+  # networking.usePredictableInterfaceNames = false;
+
   # Network.
   systemd.network = {
     enable = true;
+    # Substitute with machine's interface name.
     networks."40-enp195s0" = {
       matchConfig = {
         Name = "enp195s0";
       };
       gateway = [ "fe80::1" "1.2.3.99" ];
       networkConfig = {
+        # Substitute machine's your address.
         Address = "2a01:4f8:aaaa:bbbb::2/128";
       };
       addresses = [
@@ -34,6 +39,7 @@ with lib;
     };
   };
 
+  # Demonstration of firewall, adjust to your needs.
   networking.firewall = {
     allowedTCPPorts = [ 80 443 ];
     allowedUDPPorts = [ 443 ];