nixos/tests: Add a test for boot stage 1

We already have a small regression test for #15226 within the swraid
installer test. Unfortunately, we only check there whether the md
kthread got signalled but not whether other rampaging processes are
still alive that *should* have been killed.

So in order to do this we provide multiple canary processes which are
checked after the system has booted up:

 * canary1: It's a simple forking daemon which just sleeps until it's
            going to be killed. Of course we expect this process to not
            be alive anymore after boot up.
 * canary2: Similar to canary1, but tries to mimick a kthread to make
            sure that it's going to be properly killed at the end of
            stage 1.
 * canary3: Like canary2, but this time using a @ in front of its
            command name to actually prevent it from being killed.
 * kcanary: This one is a real kthread and it runs until killed, which
            shouldn't be the case.

Tested with and without 67223ee and everything works as expected, at
least on my machine.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/nixos/release.nix b/nixos/release.nix
index 97f6df16dc99..c8547784bbcf 100644
--- a/nixos/release.nix
+++ b/nixos/release.nix
@@ -209,6 +209,7 @@ in rec {
   tests.bittorrent = callTest tests/bittorrent.nix {};
   tests.blivet = callTest tests/blivet.nix {};
   tests.boot = callSubTests tests/boot.nix {};
+  tests.boot-stage1 = callTest tests/boot-stage1.nix {};
   tests.cadvisor = hydraJob (import tests/cadvisor.nix { system = "x86_64-linux"; });
   tests.chromium = (callSubTests tests/chromium.nix { system = "x86_64-linux"; }).stable;
   tests.cjdns = callTest tests/cjdns.nix {};