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swraid service: use upstream units

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This fixes a serious bug on NixOS with swraid where mdadm arrays weren't
properly stopped on shutdown. Rather than fixing the unit by adding
`Before=final.target` we completely move to upstream units, which uses
systemd shutdown hooks instead. This also drives down maintenance costs
for us.
This commit is contained in:
Nikolay Amiantov 2019-07-25 16:36:16 +03:00
parent b9b27912ce
commit ca780f4a18
1 changed files with 3 additions and 41 deletions
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44
nixos/modules/tasks/swraid.nix
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@ -6,51 +6,13 @@
services.udev.packages = [ pkgs.mdadm ];
systemd.packages = [ pkgs.mdadm ];
systemd.shutdownPackages = [ pkgs.mdadm ];
boot.initrd.availableKernelModules = [ "md_mod" "raid0" "raid1" "raid10" "raid456" ];
boot.initrd.extraUdevRulesCommands = ''
cp -v ${pkgs.mdadm}/lib/udev/rules.d/*.rules $out/
'';
systemd.services.mdadm-shutdown = {
wantedBy = [ "final.target"];
after = [ "umount.target" ];
unitConfig = {
DefaultDependencies = false;
};
serviceConfig = {
Type = "oneshot";
ExecStart = ''${pkgs.mdadm}/bin/mdadm --wait-clean --scan'';
};
};
systemd.services."mdmon@" = {
description = "MD Metadata Monitor on /dev/%I";
unitConfig.DefaultDependencies = false;
serviceConfig = {
Type = "forking";
Environment = "IMSM_NO_PLATFORM=1";
ExecStart = ''${pkgs.mdadm}/bin/mdmon --offroot --takeover %I'';
KillMode = "none";
};
};
systemd.services."mdadm-grow-continue@" = {
description = "Manage MD Reshape on /dev/%I";
unitConfig.DefaultDependencies = false;
serviceConfig = {
ExecStart = ''${pkgs.mdadm}/bin/mdadm --grow --continue /dev/%I'';
StandardInput = "null";
StandardOutput = "null";
StandardError = "null";
KillMode = "none";
};
};
}