sops hosts layout
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258
hosts/cryochamber/configuration.nix
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258
hosts/cryochamber/configuration.nix
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{ config, pkgs, lib, impermanence, ... }:
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#zpool import -f rpool
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#mount -t zfs rpool/local/root /mnt
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#mkdir -p /mnt/{boot,nix,home,persist,var/lib,var/log}
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#mount /dev/vda2 /mnt/boot
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#mount -t zfs rpool/local/nix /mnt/nix
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#mount -t zfs rpool/safe/home /mnt/home
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#mount -t zfs rpool/safe/persist /mnt/persist
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#mount -t zfs rpool/local/var/lib /mnt/var/lib
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#mount -t zfs rpool/local/var/log /mnt/var/log
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{
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imports =
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[
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./hardware-configuration.nix
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"${impermanence}/nixos.nix"
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];
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# Enable ZFS support
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boot.supportedFilesystems = [ "zfs" ];
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boot.zfs.requestEncryptionCredentials = false;
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fileSystems = {
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"/persist" = {
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device = "rpool/safe/persist";
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fsType = "zfs";
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neededForBoot = true; # Only /persist needs to be marked as needed for boot
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};
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};
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# Import the existing ZFS pool from the second disk without formatting it
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boot.zfs.extraPools = [ "tank" ];
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boot.zfs.devNodes = "/dev/disk/by-path"; # This is neede for ZFS to find the pool at boot
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# Use GRUB with BIOS booting, whether MBR or GPT
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boot.loader.grub.enable = true;
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boot.loader.grub.device = "/dev/vda";
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boot.loader.grub.zfsSupport = true;
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boot.loader.grub.efiSupport = false;
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# Impermanence configuration
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# Set up impermanence - root filesystem will be reset on each boot
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boot.initrd.postResumeCommands = lib.mkAfter ''
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zfs rollback -r rpool/local/root@blank
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'';
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# /var/log and /var/lib ar persisted through zfs datasets, but not backed up.
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# Anything stored in /persist should get backed up.
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environment.persistence."/persist" = {
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hideMounts = true;
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directories = [
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"/root"
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"/etc/nixos"
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"/etc/ssh"
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];
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files = [
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"/etc/machine-id"
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];
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};
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# Files are not copied to /persist during install, so need to do so manually
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#rsync -azPH /mnt/root/ /mnt/persist/root
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#rsync -azPH /mnt/etc/nixos/ /mnt/persist/etc/nixos
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#rsync -azPH /mnt/etc/ssh/ /mnt/persist/etc/ssh
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#cp /mnt/etc/machine-id /mnt/persist/etc/machine-id
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# Swap configuration
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swapDevices = [ {
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device = "/dev/vda3";
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randomEncryption.enable = true;
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} ];
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# Basic system configuration
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networking.hostId = "5472a981"; # Required for ZFS
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networking.hostName = "cryochamber";
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# Enable networking
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networking.networkmanager.enable = true;
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# Don't lecture after reboot
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security.sudo.extraConfig = ''
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Defaults lecture = never
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'';
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# Set your time zone
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time.timeZone = "UTC";
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# Docker configuration
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virtualisation.docker = {
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enable = true;
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extraOptions = "--storage-driver=overlay2";
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};
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# System packages
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environment.systemPackages = with pkgs; [
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git
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vim
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wget
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curl
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htop
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zfs
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zsh
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tmux
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docker-compose
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lzop # for syncoid
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pv # for syncoid
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mbuffer # for syncoid
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];
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services.zfs.autoScrub = {
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enable = true;
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interval = "weekly";
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pools = [ "tank" ];
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};
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services.sanoid = {
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enable = true;
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templates.backup = {
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frequently = 0;
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hourly = 0;
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daily = 30;
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monthly = 6;
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yearly = 3;
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autosnap = false;
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autoprune = true;
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recursive = true;
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};
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datasets."tank" = {
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useTemplate = [ "backup" ];
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};
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datasets."rpool/safe" = {
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useTemplate = [ "backup" ];
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};
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};
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# sops-nix secrets
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sops.defaultSopsFile = ./secrets/config.yaml;
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sops.age.sshKeyPaths = [ "/etc/ssh/ssh_host_ed25519_key" ];
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sops.secrets.hashedPassword.neededForUsers = true;
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# Define a user account
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users.users.hunner = {
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isNormalUser = true;
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extraGroups = [ "wheel" "docker" "networkmanager" ];
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hashedPasswordFile = config.sops.secrets.hashedPassword.path;
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shell = pkgs.zsh;
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packages = with pkgs; [
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fzf
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neovim
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devenv
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pass
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jq
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yq
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yt-dlp
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bat
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ripgrep
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fd
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shellcheck
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tldr
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unzip
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lsof
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gnupg
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];
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};
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users.users.backup = {
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isNormalUser = true;
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description = "Backup replication user";
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shell = pkgs.bash;
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packages = with pkgs; [
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sanoid
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];
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openssh.authorizedKeys.keys = [
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"ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDtgW+cxPjo70k6dkYPqzP0FR5G9zvbArp/85ZHRrMRL backup@cryochamber"
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];
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};
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#services.syncoid = {
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# enable = true;
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# user = "backup";
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# sshKey = "/var/lib/syncoid/.ssh/id_ed25519";
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# commonArgs = [
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# #"--sshoption=StrictHostKeyChecking=off"
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# "--sshoption=UserKnownHostsFile=/var/lib/syncoid/.ssh/known_hosts"
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# "--sshoption=IdentitiesOnly=yes"
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# ];
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# #commands."zima-bitrot" = {
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# # source = "backup@zima:bitrot";
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# # target = "tank/backups/zima/bitrot";
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# # recursive = true;
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# #};
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# commands."zima-rpool-safe" = {
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# source = "backup@zima:rpool/safe";
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# target = "tank/backups/zima/rpool-safe";
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# recursive = true;
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# };
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#};
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#systemd.services.syncoid-zima-rpool-safe.serviceConfig = {
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# Environment = [
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# "HOME=/var/lib/syncoid"
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# "SSH_AUTH_SOCK="
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# ];
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# ExecStartPre = [
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# "+${pkgs.coreutils}/bin/mkdir -p /var/lib/syncoid/.ssh"
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# "+${pkgs.coreutils}/bin/cp /home/backup/.ssh/id_ed25519 /var/lib/syncoid/.ssh/"
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# "+${pkgs.coreutils}/bin/cp /home/backup/.ssh/known_hosts /var/lib/syncoid/.ssh/"
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# "+${pkgs.coreutils}/bin/chown -R backup:syncoid /var/lib/syncoid/.ssh"
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# "+${pkgs.coreutils}/bin/chmod 700 /var/lib/syncoid/.ssh"
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# "+${pkgs.coreutils}/bin/chmod 600 /var/lib/syncoid/.ssh/id_ed25519"
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# ];
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#};
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#systemd.services.syncoid-replication = {
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# description = "ZFS syncoid replication";
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# path = with pkgs; [ sanoid openssh zfs ];
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# wants = [ "network-online.target" ];
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# after = [ "network-online.target" "zfs.target" ];
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# startAt = "03:00";
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# serviceConfig = {
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# Type = "oneshot";
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# User = "backup";
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# ExecStart = ''
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# ${pkgs.sanoid}/bin/syncoid \
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# --recursive \
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# --create-bookmark \
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# --sendoptions=w \
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# --source-bwlimit=50000 \
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# backup@zima:rpool/safe \
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# tank/backups/zima/rpool-safe
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# '';
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# TimeoutStartSec = "6h";
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# };
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#};
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programs.direnv = {
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enable = true;
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nix-direnv.enable = true;
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};
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programs.zsh.enable = true;
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services.openssh.enable = true;
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services.openssh.settings.PermitRootLogin = "prohibit-password";
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services.openssh.settings.Macs = [
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"hmac-sha2-512"
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"hmac-sha2-512-etm@openssh.com"
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"hmac-sha2-256-etm@openssh.com"
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"umac-128-etm@openssh.com"
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];
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services.tailscale.enable = true;
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nix.settings.experimental-features = [ "nix-command" "flakes" ];
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nixpkgs.config.allowUnfree = true;
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system.stateVersion = "24.11";
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}
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