merge development add luks encryption

hosts/bootstrap/default.nix

@@ -3,16 +3,17 @@ let
   pubKeys = lib.filesystem.listFilesRecursive (../common/users/keys);
   secretsDirectory = builtins.toString inputs.nix-secrets;
   secretsFile = "${secretsDirectory}/secrets.yaml";
-in 
+in
 {
   imports =
-    [ 
+    [
       # Disk configuration
+      inputs.sops-nix.nixosModules.sops
       inputs.disko.nixosModules.disko
-      (import ../common/disks/std-disk-config.nix { device = "/dev/vda"; })
+      (import ../common/disks/luks-btrfs-subvolumes.nix { device = "/dev/vda" ; })
+      #(import ../common/disks/std-disk-config.nix { device = "/dev/vda" ; })
       ../common/optional/btrfs-impermanence.nix
       inputs.impermanence.nixosModules.impermanence
-      inputs.sops-nix.nixosModules.sops
 
       # Import core options
       ./hardware-configuration.nix
@@ -42,14 +43,14 @@ in
     ];
   };
 
- 
+
   i18n.defaultLocale = "en_GB.UTF-8";
   console = {
     font = "Lat2-Terminus16";
     keyMap = "uk";
-    useXkbConfig = false; 
+    useXkbConfig = false;
   };
- 
+
 
   boot = {
     loader = {
@@ -96,7 +97,7 @@ in
       pkgs.just
       pkgs.git
       pkgs.neovim
-  ]; 
+  ];
 
   services.openssh = {
     enable = true;
@@ -115,7 +116,7 @@ in
     };
   };
 
-  programs.ssh.extraConfig = '' 
+  programs.ssh.extraConfig = ''
     Host git.bitlab21.com
         IdentitiesOnly yes
         StrictHostKeyChecking no
@@ -125,7 +126,7 @@ in
   security.pam = {
     sshAgentAuth.enable = true;
   };
-  
+
   networking.firewall.allowedTCPPorts = [ 22 ];
 
   services = {

hosts/common/disks/luks-btrfs-subvolumes.nix

@@ -1,9 +1,10 @@
+{device ? throw "Must define a device, e.g. /dev/sda"}:
 {
   disko.devices = {
     disk = {
       vdb = {
         type = "disk";
-        device = "/dev/vdb";
+        inherit device;
         content = {
           type = "gpt";
           partitions = {
@@ -25,36 +26,38 @@
                 type = "luks";
                 name = "crypted";
                 # disable settings.keyFile if you want to use interactive password entry
-                #passwordFile = "/tmp/secret.key"; # Interactive
-                settings = {
-                  allowDiscards = true;
-                  keyFile = "/tmp/secret.key";
-                };
-                additionalKeyFiles = [ "/tmp/additionalSecret.key" ];
-                content = {
-                  type = "btrfs";
-                  extraArgs = [ "-f" ];
-                  subvolumes = {
-                    "/root" = {
-                      mountpoint = "/";
-                      mountOptions = [ "compress=zstd" "noatime" ];
-                    };
-                    "/home" = {
-                      mountpoint = "/home";
-                      mountOptions = [ "compress=zstd" "noatime" ];
-                    };
-                    "/nix" = {
-                      mountpoint = "/nix";
-                      mountOptions = [ "compress=zstd" "noatime" ];
-                    };
-                    "/swap" = {
-                      mountpoint = "/.swapvol";
-                      swap.swapfile.size = "20M";
-                    };
+                passwordFile = "/tmp/luks_secret.key"; # Interactive
+#                settings = {
+#                  allowDiscards = true;
+#                  keyFile = "${sopsHashedPasswordFile}";
+#                };
+                  content = {
+                    type = "btrfs";
+                    extraArgs = ["-f"];
+                      subvolumes = {
+                        "/root" = {
+                          mountpoint = "/";
+                        };
+
+                        "/persist" = {
+                          mountOptions = [ "subvol=persist" ];
+                          mountpoint = "/persist";
+                        };
+
+                        "/nix" = {
+                          mountOptions = [ "subvol=nix" "noatime" ];
+                          mountpoint = "/nix";
+                        };
+
+                        "/swap" = {
+                          mountOptions = [ "noatime" ];
+                          mountpoint = "/.swapvol";
+                          swap.swapfile.size = "8192M";
+                        };
+                      };
                   };
                 };
               };
-            };
           };
         };
       };

hosts/common/optional/btrfs-impermanence.nix

@@ -2,7 +2,7 @@
 {
 boot.initrd.postDeviceCommands = lib.mkAfter ''
   mkdir /btrfs_tmp
-    mount /dev/root_vg/root /btrfs_tmp
+    mount /dev/mapper/crypted /btrfs_tmp
     if [[ -e /btrfs_tmp/root ]]; then
         mkdir -p /btrfs_tmp/old_roots
         timestamp=$(date --date="@$(stat -c %Y /btrfs_tmp/root)" "+%Y-%m-%-d_%H:%M:%S")

hosts/sparky/default.nix

@@ -1,10 +1,10 @@
 { inputs, config, lib, pkgs, outputs,... }:
 let
   dev = "/dev/vda";
-in 
+in
 {
   imports =
-    [ 
+    [
       # Disk configuration
       inputs.disko.nixosModules.disko
       (import ../common/disks/std-disk-config.nix { device = dev; })

scripts/bootstrap.sh

@@ -5,7 +5,7 @@ Before using this tool, ensure that the host has been setup correctly.
 Boot the latest Nixos-minimal install ISO on the host and access the tty.
 
 Use 'ip a' to get the ip address, then 'sudo su' to change to root. Finally
-Run 'passwd' and set a temporary password (something simple like '1234') 
+Run 'passwd' and set a temporary password (something simple like '1234')
 for the root user.
 "
 
@@ -17,34 +17,35 @@ ip="192.168.122.193"
 config="bootstrap"
 
 # Delete key in known hosts if exists
-sed -i "/$ip/d" ~/.ssh/known_hosts 
+sed -i "/$ip/d" ~/.ssh/known_hosts
 
 # Authorise source public key
 echo "Copying pubkey to target host"
 ssh-copy-id -i "$(readlink -f "$HOME/.ssh/id_ed25519.pub")" "root@$ip"
 
-# Create temp directory for ssh keys to be copied to host:
-temp=$(mktemp -d)
+# Create temp directory for ssh and luks keys to be copied to host:
+temp_ssh=$(mktemp -d)
+touch /tmp/luks_secret.key
 
 # Function to cleanup temporary directory on exit
 cleanup() {
-  rm -rf "$temp"
+  rm -rf "$temp_ssh" /tmp/luks_secret.key
 }
 trap cleanup EXIT
 
 # Create the directory where sshd expects to find the host keys
-install -d -m755 "$temp/persist/etc/ssh"
+install -d -m755 "$temp_ssh/persist/etc/ssh"
 
 # Create ssh keys if not exists
 echo "Creating '$hostname' ssh keys"
-ssh-keygen -t ed25519 -f "$temp/persist/etc/ssh/ssh_host_ed25519_key" -C root@"$hostname" -N ""
+ssh-keygen -t ed25519 -f "$temp_ssh/persist/etc/ssh/ssh_host_ed25519_key" -C root@"$hostname" -N ""
 
-chmod 600 "$temp/persist/etc/ssh/ssh_host_ed25519_key"
-chmod 644 "$temp/persist/etc/ssh/ssh_host_ed25519_key.pub"
+chmod 600 "$temp_ssh/persist/etc/ssh/ssh_host_ed25519_key"
+chmod 644 "$temp_ssh/persist/etc/ssh/ssh_host_ed25519_key.pub"
 
 # Generate age key from target host and user public ssh key
 echo "Generating age key from target host and user ssh key"
-HOST_AGE_KEY=$(nix-shell -p ssh-to-age --run "cat $temp/persist/etc/ssh/ssh_host_ed25519_key.pub | ssh-to-age")
+HOST_AGE_KEY=$(nix-shell -p ssh-to-age --run "cat $temp_ssh/persist/etc/ssh/ssh_host_ed25519_key.pub | ssh-to-age")
 echo -e "Host age key:\n$HOST_AGE_KEY\n"
 
 # Update .sops.yaml with new age key:
@@ -61,13 +62,15 @@ sed -i "{
 
 just update-sops-secrets && just update-flake-secrets && just update-flake
 
-echo -e "\nNeed to change ownership of temp directories, enter sudo password if prompted:\n"
+# Extract luks key from secrets
+luks_secret=$(nix-shell -p sops --run "SOPS_AGE_KEY_FILE=~/.config/sops/age/keys.txt sops -d --extract '[""\"luks_passphrase""\"][""\"sparky""\"]' ../nix-secrets/secrets.yaml")
+echo "$luks_secret" > /tmp/luks_secret.key
 
 # Install Nixos to target
 cd "$HOME/nixos"
 git add . && git commit -m "auto: bootstrapping $hostname" && git push
 
-nix run github:nix-community/nixos-anywhere/242444d228636b1f0e89d3681f04a75254c29f66 -- --extra-files "$temp" --flake .#"$config" root@"$ip" -i "$HOME/.ssh/id_ed25519"
+SHELL=/bin/sh nix run github:nix-community/nixos-anywhere/242444d228636b1f0e89d3681f04a75254c29f66 -- --extra-files "$temp_ssh" --disk-encryption-keys /tmp/luks_secret.key /tmp/luks_secret.key --flake .#"$config" root@"$ip" -i "$HOME/.ssh/id_ed25519"
 [ $? != 0 ] && echo "Error installing Nixos" && exit 1
 
 ## Delete keys from local known_hosts