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{ pkgs, ... }:
{
name = "systemd-initrd-simple";
nodes.machine = {
testing.initrdBackdoor = true;
boot.initrd.systemd.enable = true;
virtualisation.fileSystems."/".autoResize = true;
};
testScript =
{ nodes, ... }:
# python
''
import subprocess
with subtest("testing initrd backdoor"):
machine.wait_for_unit("initrd.target")
machine.succeed("systemctl status initrd-fs.target")
machine.switch_root()
with subtest("handover to stage-2 systemd works"):
machine.wait_for_unit("multi-user.target")
machine.succeed("systemd-analyze | grep -q '(initrd)'") # direct handover
machine.succeed("touch /testfile") # / is writable
machine.fail("touch /nix/store/testfile") # /nix/store is not writable
# Special filesystems are mounted by systemd
machine.succeed("[ -e /run/booted-system ]") # /run
machine.succeed("[ -e /sys/class ]") # /sys
machine.succeed("[ -e /dev/null ]") # /dev
machine.succeed("[ -e /proc/1 ]") # /proc
# stage-2-init mounted more special filesystems
machine.succeed("[ -e /dev/shm ]") # /dev/shm
machine.succeed("[ -e /dev/pts/ptmx ]") # /dev/pts
machine.succeed("[ -e /run/keys ]") # /run/keys
# /nixos-closure didn't leak into stage-2
machine.succeed("[ ! -e /nixos-closure ]")
with subtest("groups work"):
machine.fail("journalctl -b 0 | grep 'systemd-udevd.*Unknown group.*ignoring'")
with subtest("growfs works"):
oldAvail = machine.succeed("df --output=avail / | sed 1d")
machine.shutdown()
subprocess.check_call(["${nodes.machine.virtualisation.qemu.package}/bin/qemu-img", "resize", "vm-state-machine/machine.qcow2", "+1G"])
machine.start()
machine.switch_root()
newAvail = machine.succeed("df --output=avail / | sed 1d")
assert int(oldAvail) < int(newAvail), "File system did not grow"
with subtest("no warnings from systemd about write permissions"):
machine.fail("journalctl -b 0 | grep 'is marked world-writable, which is a security risk as it is executed with privileges'")
'';
}
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