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nixos/test-instrumentation: Fix backdoor ordering

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In #256226, `backdoor.service` was changed to be part of
`sysinit.target` instead of having default dependencies. This broke
several tests that relied on `backdoor.service` starting after default
targets. For example, `systemd-boot.update` expects `/boot` to be
mounted as soon as the backdoor is running.

These tests really ought to be declaring their dependencies properly
with things like `machine.wait_for_unit("local-fs.target")`, because
it's useful for the backdoor to start as early as possible. But for
now, let's just order it the way it was before in stage 2, and use the
earlier ordering in the new stage 1 context.
This commit is contained in:
Will Fancher 2023-11-12 14:58:49 -05:00
parent d638da8b6a
commit 1a2f2cf95d
1 changed files with 21 additions and 6 deletions
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27
nixos/modules/testing/test-instrumentation.nix
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@ -11,10 +11,6 @@ let
qemu-common = import ../../lib/qemu-common.nix { inherit lib pkgs; };
backdoorService = {
wantedBy = [ "sysinit.target" ];
unitConfig.DefaultDependencies = false;
conflicts = [ "shutdown.target" "initrd-switch-root.target" ];
before = [ "shutdown.target" "initrd-switch-root.target" ];
requires = [ "dev-hvc0.device" "dev-${qemu-common.qemuSerialDevice}.device" ];
after = [ "dev-hvc0.device" "dev-${qemu-common.qemuSerialDevice}.device" ];
script =
@ -80,7 +76,12 @@ in
}
];
systemd.services.backdoor = backdoorService;
systemd.services.backdoor = lib.mkMerge [
backdoorService
{
wantedBy = [ "multi-user.target" ];
}
];
boot.initrd.systemd = lib.mkMerge [
{
@ -104,7 +105,21 @@ in
"/bin/true"
];
services.backdoor = backdoorService;
services.backdoor = lib.mkMerge [
backdoorService
{
# TODO: Both stage 1 and stage 2 should use these same
# settings. But a lot of existing tests rely on
# backdoor.service having default orderings,
# e.g. systemd-boot.update relies on /boot being mounted
# as soon as backdoor starts. But it can be useful for
# backdoor to start even earlier.
wantedBy = [ "sysinit.target" ];
unitConfig.DefaultDependencies = false;
conflicts = [ "shutdown.target" "initrd-switch-root.target" ];
before = [ "shutdown.target" "initrd-switch-root.target" ];
}
];
contents."/usr/bin/env".source = "${pkgs.coreutils}/bin/env";
})