1 files changed, 145 insertions, 0 deletions
diff --git a/nixos/cobalt/configuration.nix b/nixos/cobalt/configuration.nix
new file mode 100644
index 0000000..c596536
--- /dev/null
+++ b/nixos/cobalt/configuration.nix
@@ -0,0 +1,145 @@
+# 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, lib, ... }:
+let
+  ipv4 = {
+    address = "95.216.74.104";
+    gateway = "95.216.74.65";
+    netmask = "255.255.255.192";
+    prefixLength = 26; # https://www.pawprint.net/designresources/netmask-converter.php
+  };
+  ipv6 = {
+    address = "2a01:4f9:2b:a98::";
+    gateway = "fe80::1";
+    prefixLength = 64;
+  };
+  networkInterface = "eth0";
+  hostName = "cobalt";
+  hostId = "712ae82a";
+in
+{
+  imports =
+    [
+      # Include the results of the hardware scan.
+      ./hardware-configuration.nix
+
+      ./services/acme.nix
+      ./services/nginx.nix
+      ./services/fail2ban.nix
+      ./services/soju.nix
+      ./services/gitolite.nix
+      ./services/git-daemon.nix
+      ./services/cgit.nix
+    ];
+
+  boot.supportedFilesystems = [ "zfs" ];
+  networking.hostId = hostId;
+
+  boot.loader.grub.enable = true;
+  # boot.loader.grub.version = 2;
+  boot.loader.grub.efiSupport = false;
+  # boot.loader.grub.device = "nodev";
+
+  # This should be done automatically, but explicitly declare it just in case.
+  boot.loader.grub.copyKernels = true;
+  # Make sure that you've listed all of the boot partitions here.
+  boot.loader.grub.mirroredBoots = [
+    { path = "/boot"; devices = [ "/dev/disk/by-id/ata-ST4000NM0245-1Z2107_ZC17GW7G" ]; }
+    { path = "/boot-fallback"; devices = [ "/dev/disk/by-id/ata-ST4000NM0245-1Z2107_ZC17GWB2" ]; }
+  ];
+
+  # Boot normally when one of the boot partitions are missing
+  fileSystems."/boot".options = [ "nofail" ];
+  fileSystems."/boot-fallback".options = [ "nofail" ];
+
+  # Erase your darlings
+  boot.initrd.postDeviceCommands = lib.mkAfter ''
+    zfs rollback -r rpool/local/root@blank
+  '';
+
+  # NOTE: replace these to boot.initrd.availableKernelModules?
+  boot.kernelModules = [ "e1000e" ];
+  boot.initrd.kernelModules = [ "e1000e" ];
+
+  boot.kernelParams = [
+    # See <https:#www.kernel.org/doc/Documentation/filesystems/nfs/nfsroot.txt> for documentation.
+    # ip=<client-ip>:<server-ip>:<gw-ip>:<netmask>:<hostname>:<device>:<autoconf>:<dns0-ip>:<dns1-ip>:<ntp0-ip>
+    # The server ip refers to the NFS server -- not needed in this case.
+    "ip=${ipv4.address}::${ipv4.gateway}:${ipv4.netmask}:${hostName}-initrd:${networkInterface}:off:8.8.8.8"
+  ];
+
+  boot.initrd.network.enable = true;
+  boot.initrd.network.ssh = {
+    enable = true;
+
+    # Using the same port as the actual SSH will cause clients to throw errors
+    # related to host key mismatch.
+    port = 2222;
+
+    # This takes 'path's, not 'string's.
+    hostKeys = [
+      /boot/initrd-ssh-key
+      /boot-fallback/initrd-ssh-key
+    ];
+
+    # Public ssh key to log into the initrd ssh
+    authorizedKeys = [ "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDi7GGOGVj1Y5Sc1EW6zEdrp78dS6hvmS348pqu9dUsB openpgp:0x6BE7BD6F" ];
+  };
+  boot.initrd.network.postCommands = ''
+    cat <<EOF > /root/.profile
+    if pgrep -x "zfs" > /dev/null
+    then
+      zfs load-key -a
+      killall zfs
+    else
+      echo "ZFS is not running -- this could be a sign of failure."
+    fi
+    EOF
+  '';
+
+
+  networking.hostName = hostName; # Define your hostname.
+
+  networking.useDHCP = false;
+  networking.interfaces.${networkInterface} = {
+    ipv4 = { addresses = [{ address = ipv4.address; prefixLength = ipv4.prefixLength; }]; };
+    ipv6 = { addresses = [{ address = ipv6.address; prefixLength = ipv6.prefixLength; }]; };
+  };
+  networking.defaultGateway = ipv4.gateway;
+  networking.defaultGateway6 = { address = ipv6.gateway; interface = networkInterface; };
+  networking.nameservers = [ "8.8.8.8" ];
+
+  # Set your time zone.
+  time.timeZone = "UTC";
+
+  users.users.root.initialHashedPassword = "";
+  users.users.root.openssh.authorizedKeys.keys = [ "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDi7GGOGVj1Y5Sc1EW6zEdrp78dS6hvmS348pqu9dUsB openpgp:0x6BE7BD6F" ];
+  services.openssh.enable = true;
+  services.openssh.permitRootLogin = "prohibit-password";
+  # mkdir -p /persist/etc/ssh
+  services.openssh.hostKeys = [
+    {
+      path = "/persist/ssh/ssh_host_ed25519_key";
+      type = "ed25519";
+    }
+    {
+      path = "/persist/ssh/ssh_host_rsa_key";
+      type = "rsa";
+      bits = 4096;
+    }
+  ];
+
+  # impermanence requirement
+  fileSystems."/persist".neededForBoot = true;
+
+  # 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
+  # this value at the release version of the first install of this system.
+  # Before changing this value read the documentation for this option
+  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
+  system.stateVersion = "23.05"; # Did you read the comment?
+}
+