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nix/devices: implement disk-prepare

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steveej 2018-11-10 19:24:24 +01:00
parent 1f14b36557
commit afd4bb95f9
5 changed files with 136 additions and 83 deletions
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25
nix/os/lib/default.nix
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@ -1,5 +1,5 @@
{ keys ? import ../../variables/keys.nix
, passwords ? import ../../variables/passwords.crypt.nix
, passwords ? import ../../variables/passwords.crypt.nix
}:
{
@ -25,4 +25,27 @@
];
openssh.authorizedKeys.keys = keys.users.steveej.openssh;
} // args;
disk = rec {
# TODO: verify the GPT PARTLABEL cap at 36 chars
shortenGptPartlabel = partlabel: (builtins.substring 0 36 partlabel);
# LVM doesn't allow most characters in VG names
# TODO: replace this with a whitelist for: [a-zA-Z0-9.-_+]
volumeGroup = diskId: builtins.replaceStrings [ ":" ] [ "" ] diskId;
# This is important at install-time
bootGrubDevice = diskId: "/dev/disk/by-id/" + diskId;
# These are guaranteed by LVM
rootFsDevice = diskId: "/dev/" + (volumeGroup diskId) + "/root";
swapFsDevice = diskId: "/dev/" + (volumeGroup diskId) + "/swap";
# Cannot use the disk ID here because might be different at install vs. runtime.
# Example: MMC card which is used in the internal reader vs. USB reader
bootFsDevice = diskId: "/dev/disk/by-partlabel/" + (shortenGptPartlabel ("2-"+diskId));
bootLuksDevice = diskId: "/dev/disk/by-partlabel/" + (shortenGptPartlabel ("3-"+diskId));
luksName = diskId: (volumeGroup diskId)+"pv";
luksPhysicalVolume = diskId: "/dev/mapper/" + (luksName diskId);
};
}