mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-11-14 22:04:27 +01:00
88 lines
2.7 KiB
Nix
88 lines
2.7 KiB
Nix
{ lib, pkgs, ... }:
|
|
|
|
let
|
|
initrdLowerdir = pkgs.runCommand "initrd-lowerdir" { } ''
|
|
mkdir -p $out
|
|
echo "initrd" > $out/initrd.txt
|
|
'';
|
|
initrdLowerdir2 = pkgs.runCommand "initrd-lowerdir-2" { } ''
|
|
mkdir -p $out
|
|
echo "initrd2" > $out/initrd2.txt
|
|
'';
|
|
userspaceLowerdir = pkgs.runCommand "userspace-lowerdir" { } ''
|
|
mkdir -p $out
|
|
echo "userspace" > $out/userspace.txt
|
|
'';
|
|
userspaceLowerdir2 = pkgs.runCommand "userspace-lowerdir-2" { } ''
|
|
mkdir -p $out
|
|
echo "userspace2" > $out/userspace2.txt
|
|
'';
|
|
in
|
|
{
|
|
|
|
name = "writable-overlays";
|
|
|
|
meta.maintainers = with lib.maintainers; [ nikstur ];
|
|
|
|
nodes.machine = { config, pkgs, ... }: {
|
|
boot.initrd.systemd.enable = true;
|
|
|
|
virtualisation.fileSystems = {
|
|
"/initrd-overlay" = {
|
|
overlay = {
|
|
lowerdir = [ initrdLowerdir ];
|
|
upperdir = "/.rw-initrd-overlay/upper";
|
|
workdir = "/.rw-initrd-overlay/work";
|
|
};
|
|
neededForBoot = true;
|
|
};
|
|
"/userspace-overlay" = {
|
|
overlay = {
|
|
lowerdir = [ userspaceLowerdir ];
|
|
upperdir = "/.rw-userspace-overlay/upper";
|
|
workdir = "/.rw-userspace-overlay/work";
|
|
};
|
|
};
|
|
"/ro-initrd-overlay" = {
|
|
overlay.lowerdir = [
|
|
initrdLowerdir
|
|
initrdLowerdir2
|
|
];
|
|
neededForBoot = true;
|
|
};
|
|
"/ro-userspace-overlay" = {
|
|
overlay.lowerdir = [
|
|
userspaceLowerdir
|
|
userspaceLowerdir2
|
|
];
|
|
};
|
|
};
|
|
};
|
|
|
|
testScript = ''
|
|
machine.wait_for_unit("default.target")
|
|
|
|
with subtest("Initrd overlay"):
|
|
machine.wait_for_file("/initrd-overlay/initrd.txt", 5)
|
|
machine.succeed("touch /initrd-overlay/writable.txt")
|
|
machine.succeed("findmnt --kernel --types overlay /initrd-overlay")
|
|
|
|
with subtest("Userspace overlay"):
|
|
machine.wait_for_file("/userspace-overlay/userspace.txt", 5)
|
|
machine.succeed("touch /userspace-overlay/writable.txt")
|
|
machine.succeed("findmnt --kernel --types overlay /userspace-overlay")
|
|
|
|
with subtest("Read only initrd overlay"):
|
|
machine.wait_for_file("/ro-initrd-overlay/initrd.txt", 5)
|
|
machine.wait_for_file("/ro-initrd-overlay/initrd2.txt", 5)
|
|
machine.fail("touch /ro-initrd-overlay/not-writable.txt")
|
|
machine.succeed("findmnt --kernel --types overlay /ro-initrd-overlay")
|
|
|
|
with subtest("Read only userspace overlay"):
|
|
machine.wait_for_file("/ro-userspace-overlay/userspace.txt", 5)
|
|
machine.wait_for_file("/ro-userspace-overlay/userspace2.txt", 5)
|
|
machine.fail("touch /ro-userspace-overlay/not-writable.txt")
|
|
machine.succeed("findmnt --kernel --types overlay /ro-userspace-overlay")
|
|
'';
|
|
|
|
}
|