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75 lines
3.0 KiB
Nix
75 lines
3.0 KiB
Nix
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# TODO: I haven't used this config file yet.
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# Example taken form https://github.com/nix-community/disko/blob/master/example/luks-btrfs-subvolumes.nix
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# cryptsetup luksOpen --allow-discards
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#
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# https://wiki.gentoo.org/wiki/Dm-crypt_full_disk_encryption#Dm-crypt_on_SSDs_and_hybrid_drives
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# Cryptsetup can transparently forward discard operations to an SSD. This feature is activated by using the --allow-discards option in combination with cryptsetup open. Enabling discards on an encrypted SSD can be a measure to ensure effective wear leveling and longevity, especially if the full disk is encrypted. For an in detail discussion about the security implications, have a look at the cryptsetup FAQ and the man page of cryptsetup.
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#
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# https://man.archlinux.org/man/cryptsetup-luksOpen.8.en
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# Can make filesystem-level operations visible on the physical device. For example, information leaking filesystem type, used space, etc. may be extractable from the physical device.
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{
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disko.devices = {
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disk = {
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"256GB1" = {
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type = "disk";
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# Device nickname: 256GB1
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device = "/dev/disk/by-id/ata-SanDisk_SD7TB6S256G1001_161418401077";
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content = {
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type = "gpt";
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partitions = {
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ESP = {
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label = "EFI";
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name = "ESP";
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size = "512M";
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type = "EF00";
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content = {
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type = "filesystem";
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format = "vfat";
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mountpoint = "/boot";
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mountOptions = [
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"defaults"
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];
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};
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};
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luks = {
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size = "100%";
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content = {
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type = "luks";
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name = "256GB1";
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extraOpenArgs = [ "--allow-discards" ];
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# if you want to use the key for interactive login be sure there is no trailing newline
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# for example use `echo -n "password" > /tmp/secret.key`
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passwordFile = "/tmp/secret.key"; # Interactive login.
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#settings.keyFile = "/tmp/secret.key";
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#additionalKeyFiles = [ "/tmp/additionalSecret.key" ];
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content = {
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type = "btrfs";
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extraArgs = [ "-f" ];
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subvolumes = {
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"/@" = {
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mountpoint = "/";
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mountOptions = [ "compress=zstd" "noatime" "commit=120" ];
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};
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"/@home" = {
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mountpoint = "/home";
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mountOptions = [ "compress=zstd" "noatime" "commit=120" ];
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};
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# For snapshots created with e.g. `btrbk`.
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"/@snap" = {
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mountpoint = "/snap";
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mountOptions = [ "compress=zstd" "noatime" "commit=120" ];
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};
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};
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};
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};
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};
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};
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};
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};
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};
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};
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}
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