WIP: nixos: system: add persist

This is the module that takes care of configuring impermanence at the
system level.

WIP:
    * address FIXMEs
    * activate home-manager persistence?
        * set `programs.fuse.userAllowOther = true;` ?
    * point `age` to persisted paths [1] ?
    * make sure all services and modules are persisted correctly...

[1]: b1d18d25b8
This commit is contained in:
Bruno BELANYI 2021-10-22 13:52:04 +02:00
parent 715cfdffee
commit 605934d230
2 changed files with 68 additions and 0 deletions

View file

@ -9,6 +9,7 @@
./language ./language
./nix ./nix
./packages ./packages
./persist
./podman ./podman
./polkit ./polkit
./printing ./printing

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@ -0,0 +1,67 @@
# Ephemeral root configuration
{ config, inputs, lib, ... }:
let
cfg = config.my.system.persist;
in
{
imports = [
inputs.impermanence.nixosModules.impermanence
];
options.my.system.persist = with lib; {
enable = mkEnableOption "stateless system configuration";
mountPoint = lib.mkOption {
type = types.str;
default = "/persistent";
example = "/etc/nix/persist";
description = ''
Which mount point should be used to persist this system's files and
directories.
'';
};
files = lib.mkOption {
type = with types; listOf str;
default = [ ];
example = [
"/etc/nix/id_rsa"
];
description = ''
Additional files in the root to link to persistent storage.
'';
};
directories = lib.mkOption {
type = with types; listOf str;
default = [ ];
example = [
"/var/lib/libvirt"
];
description = ''
Additional directories in the root to link to persistent storage.
'';
};
};
config = lib.mkIf cfg.enable {
environment.persistence."${cfg.mountPoint}" = {
files = [
"/etc/machine-id"
]
++ cfg.files
;
directories = [
"/etc/nixos"
"/var/log"
"/var/lib/systemd/coredump"
]
++ (lib.optionals config.virtualisation.docker.enable [
"/var/lib/docker"
])
++ cfg.directories
;
};
};
}