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desko: enable snapper

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Colin
2025-01-19 07:38:35 +00:00
parent a46faff066
commit 2b34ef8ba4
1 changed files with 26 additions and 14 deletions
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hosts/by-name/desko/default.nix
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@@ -54,18 +54,30 @@
# TODO(2025-01-01): re-enable once rocm build is fixed: <https://github.com/NixOS/nixpkgs/pull/367695>
# hardware.amdgpu.opencl.enable = true; # desktop (AMD's opencl implementation AKA "ROCM"); probably required for ollama
# TODO: enable snapper (need to make `/nix` or `/nix/persist` a subvolume, somehow).
# default config: https://man.archlinux.org/man/snapper-configs.5
# defaults to something like:
# - hourly snapshots
# - auto cleanup; keep the last 10 hourlies, last 10 daylies, last 10 monthlys.
# to list snapshots: `sudo snapper --config nix list`
# to take a snapshot: `sudo snapper --config nix create`
# services.snapper.configs.nix = {
# # TODO: for the impermanent setup, we'd prefer to just do /nix/persist,
# # but that also requires setting up the persist dir as a subvol
# SUBVOLUME = "/nix";
# # TODO: ALLOW_USERS doesn't seem to work. still need `sudo snapper -c nix list`
# ALLOW_USERS = [ "colin" ];
# };
# snapper: btrfs auto-snapshots:
# - <https://wiki.archlinux.org/title/Snapper>
# - `man snapper-configs`
#
# to list snapshots: `snapper list`
# to take a snapshot: `snapper create` or `systemctl start snapper-timeline.service`
#
# FIRST TIME SETUP:
# - `sudo btrfs subvolume create /nix/persist`
# - if migrating from a non-subvol `/nix/persist`, then:
# - `sudo btrfs subvolume create /nix/persist.new`
# - `sudo cp --archive --one-file-system --reflink=always /nix/persist/. /nix/persist.new`
# - `sudo bash -c 'mv /nix/persist /nix/persist.old && mv /nix/persist.new /nix/persist`
# - `sudo btrfs subvolume create /nix/persist/.snapshots`
# - reboot (else all snapper calls will fail due to dbus errors)
services.snapper.configs.root = {
SUBVOLUME = "/nix/persist";
ALLOW_USERS = [ "colin" ];
TIMELINE_CLEANUP = true; # remove old snapshots every 24h
TIMELINE_CREATE = true; # take a snapshot every hour
TIMELINE_LIMIT_HOURLY = 12;
TIMELINE_LIMIT_DAILY = 7; # keep snapshots for 1d ago, 2d ago, ... 7day ago
TIMELINE_LIMIT_WEEKLY = 4; # keep snapshots for 7d ago, 14d ago, 21d ago, 28d ago
TIMELINE_LIMIT_MONTHLY = 0;
TIMELINE_LIMIT_YEARLY = 0;
};
}