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snapper: increase snapshot lifetime, except for lappy

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Colin
2025-03-12 15:29:19 +00:00
parent 0fd424306a
commit 8818f271cb
2 changed files with 10 additions and 25 deletions
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22
hosts/by-name/lappy/default.nix
View File

@@ -1,4 +1,4 @@
{ config, pkgs, ... }:
{ config, lib, pkgs, ... }:
{
imports = [
./fs.nix
@@ -30,18 +30,10 @@
# 1024 solves *most* crackles, but still noticable under heavier loads.
sane.programs.pipewire.config.min-quantum = 2048;
# 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" ];
# };
# limit how many snapshots we keep, due to extremely limited disk space (TODO: remove this override after upgrading lappy hard drive)
services.snapper.configs.root.TIMELINE_LIMIT_HOURLY = lib.mkForce 2;
services.snapper.configs.root.TIMELINE_LIMIT_DAILY = lib.mkForce 2;
services.snapper.configs.root.TIMELINE_LIMIT_WEEKLY = lib.mkForce 0;
services.snapper.configs.root.TIMELINE_LIMIT_MONTHLY = lib.mkForce 0;
services.snapper.configs.root.TIMELINE_LIMIT_YEARLY = lib.mkForce 0;
}

13
hosts/common/snapper.nix
View File

@@ -21,18 +21,11 @@
TIMELINE_CLEANUP = true; # remove old snapshots every 24h
TIMELINE_CREATE = true; # take a snapshot every hour
TIMELINE_LIMIT_HOURLY = 2;
TIMELINE_LIMIT_DAILY = 2;
TIMELINE_LIMIT_WEEKLY = 0;
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;
# TODO: enable these better settings, but i need higher capacity drives first!
# 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;
};
services.snapper.cleanupInterval = "2h"; # how frequently to gc snapshots no longer covered by the above policy (default: daily)