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feat(modules/nixos/base,hosts): add btrbk for filesystem backup

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Ryan Yin
2024-03-31 15:18:14 +08:00
parent 56015780e0
commit 4da995fa88
5 changed files with 64 additions and 8 deletions
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14
hosts/12kingdoms-rakushun/disko-fs.nix
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@@ -40,10 +40,10 @@
size = "100%";
content = {
type = "luks";
name = "crypted";
name = "encrypted";
settings = {
keyFile = "/dev/disk/by-label/OPI5P_DSC"; # The keyfile is stored on a USB stick
# The maxium size of the keyfile is 8192 bytes
# The maximum size of the keyfile is 8192 bytes
keyFileSize = 512 * 64; # match the `bs * count` of the `dd` command
keyFileOffset = 512 * 128; # match the `bs * skip` of the `dd` command
fallbackToPassword = true;
@@ -69,8 +69,16 @@
];
content = {
type = "btrfs";
extraArgs = ["-f"];
extraArgs = ["-f"]; # Force override existing partition
subvolumes = {
# mount the top-level subvolume at /btr_pool
# it will be used by btrbk to create snapshots
"/" = {
mountpoint = "/btr_pool";
# btrfs's top-level subvolume, internally has an id 5
# we can access all other subvolumes from this subvolume.
mountOptions = ["subvolid=5"];
};
"@nix" = {
mountpoint = "/nix";
mountOptions = ["compress-force=zstd:1" "noatime"];

14
hosts/12kingdoms-suzu/disko-fs.nix
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@@ -40,10 +40,10 @@
size = "100%";
content = {
type = "luks";
name = "crypted";
name = "encrypted";
settings = {
keyFile = "/dev/disk/by-label/OPI5_DSC"; # The keyfile is stored on a USB stick
# The maxium size of the keyfile is 8192 bytes
# The maximum size of the keyfile is 8192 bytes
keyFileSize = 512 * 64; # match the `bs * count` of the `dd` command
keyFileOffset = 512 * 128; # match the `bs * skip` of the `dd` command
fallbackToPassword = true;
@@ -69,8 +69,16 @@
];
content = {
type = "btrfs";
extraArgs = ["-f"];
extraArgs = ["-f"]; # Force override existing partition
subvolumes = {
# mount the top-level subvolume at /btr_pool
# it will be used by btrbk to create snapshots
"/" = {
mountpoint = "/btr_pool";
# btrfs's top-level subvolume, internally has an id 5
# we can access all other subvolumes from this subvolume.
mountOptions = ["subvolid=5"];
};
"@nix" = {
mountpoint = "/nix";
mountOptions = ["compress-force=zstd:1" "noatime"];

10
hosts/idols-ai/hardware-configuration.nix
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@@ -45,7 +45,7 @@
boot.initrd = {
# unlocked luks devices via a keyfile or prompt a passphrase.
luks.devices."crypted-nixos" = {
luks.devices."encrypted-nixos" = {
# NOTE: DO NOT use device name here(like /dev/sda, /dev/nvme0n1p2, etc), use UUID instead.
# https://github.com/ryan4yin/nix-config/issues/43
device = "/dev/disk/by-uuid/a21ca82a-9ee6-4e5c-9d3f-a93e84e4e0f4";
@@ -63,6 +63,14 @@
};
};
fileSystems."/btr_pool" = {
device = "/dev/disk/by-uuid/1167076c-dee1-486c-83c1-4b1af37555cd";
fsType = "btrfs";
# btrfs's top-level subvolume, internally has an id 5
# we can access all other subvolumes from this subvolume.
options = ["subvolid=5"];
};
# equal to `mount -t tmpfs tmpfs /`
fileSystems."/" = {
device = "tmpfs";

10
hosts/k8s/disko-config/kubevirt-disko-fs.nix
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@@ -75,8 +75,16 @@
];
content = {
type = "btrfs";
extraArgs = ["-f"];
extraArgs = ["-f"]; # Force override existing partition
subvolumes = {
# mount the top-level subvolume at /btr_pool
# it will be used by btrbk to create snapshots
"/" = {
mountpoint = "/btr_pool";
# btrfs's top-level subvolume, internally has an id 5
# we can access all other subvolumes from this subvolume.
mountOptions = ["subvolid=5"];
};
"@nix" = {
mountpoint = "/nix";
mountOptions = ["compress-force=zstd:1" "noatime"];

24
modules/nixos/base/btrbk.nix Normal file
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@@ -0,0 +1,24 @@
{
# Tool for creating snapshots and remote backups of btrfs subvolumes
# https://github.com/digint/btrbk
services.btrbk.instances.btrbk = {
# How often this btrbk instance is started. See systemd.time(7) for more information about the format.
onCalendar = "daily";
settings = {
# keep daily snapshots for 14 days
snapshot_preserve = "14d";
# keep all snapshots for 2 days, no matter how frequently you (or your cron job) run btrbk
snapshot_preserve_min = "2d";
volume = {
"/btr_pool" = {
subvolume = {
"@persistent" = {
snapshot_create = "always";
};
};
target = "/snapshots";
};
};
};
};
}