minimal nixos configuration

flake.nix

@@ -20,7 +20,13 @@
 
       systems = [ "x86_64-linux" ];
 
-      flake = { };
+      flake = with nixpkgs.lib; {
+        nixosConfigurations = {
+          two = nixosSystem {
+            modules = [ ./hosts/vm/two ];
+          };
+        };
+      };
 
       perSystem = { config, pkgs, ... }: {
         treefmt = {

hardware.nix

@@ -0,0 +1,58 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/profiles/qemu-guest.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "ata_piix" "uhci_hcd" "virtio_pci" "virtio_scsi" "sd_mod" "sr_mod" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    { device = "tmpfs";
+      fsType = "tmpfs";
+    };
+
+  fileSystems."/iso" =
+    { device = "/dev/disk/by-uuid/1980-01-01-00-00-00-00";
+      fsType = "iso9660";
+    };
+
+  fileSystems."/nix/.ro-store" =
+    { device = "/iso/nix-store.squashfs";
+      fsType = "squashfs";
+      options = [ "loop" ];
+    };
+
+  fileSystems."/nix/.rw-store" =
+    { device = "tmpfs";
+      fsType = "tmpfs";
+    };
+
+  fileSystems."/nix/store" =
+    { device = "overlay";
+      fsType = "overlay";
+    };
+
+  fileSystems."/mnt" =
+    { device = "/dev/disk/by-uuid/78bbf8a3-b4d6-4f1b-824e-4a9132aae372";
+      fsType = "ext4";
+    };
+
+  swapDevices = [ ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.ens18.useDHCP = lib.mkDefault true;
+  # networking.interfaces.ens19.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+}

hosts/vm/two/default.nix

@@ -0,0 +1,10 @@
+{ ... }:
+
+{
+  imports = [
+    ./hardware-configuration.nix
+    ./networking.nix
+
+    ../../../modules/crans
+  ];
+}

hosts/vm/two/hardware-configuration.nix

@@ -0,0 +1,58 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/profiles/qemu-guest.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "ata_piix" "uhci_hcd" "virtio_pci" "virtio_scsi" "sd_mod" "sr_mod" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    { device = "tmpfs";
+      fsType = "tmpfs";
+    };
+
+  fileSystems."/iso" =
+    { device = "/dev/disk/by-uuid/1980-01-01-00-00-00-00";
+      fsType = "iso9660";
+    };
+
+  fileSystems."/nix/.ro-store" =
+    { device = "/iso/nix-store.squashfs";
+      fsType = "squashfs";
+      options = [ "loop" ];
+    };
+
+  fileSystems."/nix/.rw-store" =
+    { device = "tmpfs";
+      fsType = "tmpfs";
+    };
+
+  fileSystems."/nix/store" =
+    { device = "overlay";
+      fsType = "overlay";
+    };
+
+  fileSystems."/mnt" =
+    { device = "/dev/disk/by-uuid/78bbf8a3-b4d6-4f1b-824e-4a9132aae372";
+      fsType = "ext4";
+    };
+
+  swapDevices = [ ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.ens18.useDHCP = lib.mkDefault true;
+  # networking.interfaces.ens19.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+}

hosts/vm/two/hardware.nix

@@ -0,0 +1,32 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/profiles/qemu-guest.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "ata_piix" "uhci_hcd" "virtio_pci" "virtio_scsi" "sd_mod" "sr_mod" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    { device = "/dev/disk/by-uuid/78bbf8a3-b4d6-4f1b-824e-4a9132aae372";
+      fsType = "ext4";
+    };
+
+  swapDevices = [ ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.ens18.useDHCP = lib.mkDefault true;
+  # networking.interfaces.ens19.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+}

hosts/vm/two/networking.nix

@@ -0,0 +1,53 @@
+{ ... }:
+
+{
+  networking = {
+    interfaces = {
+      ens18 = {
+
+        ipv4 = {
+          addresses = [{
+            address = "172.16.10.135";
+            prefixLength = 24;
+          }];
+        };
+
+        ipv6 = {
+          addresses = [{
+            address = "fd00::10:0:ff:fe01:3510";
+            prefixLength = 64;
+          }];
+        };
+
+      };
+
+      ens19 = {
+
+        ipv4 = {
+          addresses = [{
+            address = "172.16.3.135";
+            prefixLength = 24;
+          }];
+          routes = [{
+            address = "0.0.0.0";
+            via = "172.16.3.99";
+            prefixLength = 0;
+          }];
+        };
+
+        ipv6 = {
+          addresses = [{
+            address = "2a0c:700:3::ff:fe01:3503";
+            prefixLength = 64;
+          }];
+          routes = [{
+            address = "::";
+            via = "2a0c:700:3::ff:fe00:9903";
+            prefixLength = 0;
+          }];
+        };
+
+      };
+    };
+  };
+}

modules/crans/default.nix

@@ -0,0 +1,9 @@
+{ ... }:
+
+{
+  imports = [
+    ./locale.nix
+    ./networking.nix
+    ./ntp.nix
+  ];
+}

modules/crans/home.nix

@@ -0,0 +1,14 @@
+{ pkgs, ... }:
+
+{
+  fileSystems.home_nounou = {
+    mountPoint = "/home_nounou";
+    device = "172.16.10.1:/pool/home";
+    fsType = "nfs";
+    options = [ "rw" "nosuid" ];
+  };
+
+  environment.systemPackages = with pkgs; [
+    nfs-utils
+  ];
+}

modules/crans/locale.nix

@@ -0,0 +1,7 @@
+{ ... }:
+
+{
+  i18n.defaultLocale = "en_US.UTF-8";
+  console.keyMap = "fr";
+  time.timeZone = "Europe/Paris";
+}

modules/crans/networking.nix

@@ -0,0 +1,10 @@
+{ ... }:
+
+{
+  # Les interfaces ne sont pas déclarées ici : elles sont propres à chaque VM.
+  networking = {
+    useDHCP = false;
+    firewall.enable = false;
+    nameservers = [ "172.16.10.128" ];
+  };
+}

modules/crans/ntp.nix

@@ -0,0 +1,8 @@
+{ ... }:
+
+{
+  services.timesyncd = {
+    enable = true;
+    servers = [ "ntp.adm.crans.org" ];
+  };
+}