diff options
Diffstat (limited to 'nixos/cobalt/configuration.nix')
| -rw-r--r-- | nixos/cobalt/configuration.nix | 145 |
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? +} + |