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growPartition: fix volume resizing on EC2 NVME instances

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The previous code for this accidentally picked up a "p" when computing the partition number.
This logic should be more robust
This commit is contained in:
Ihor Antonov 2018-04-19 08:47:10 -04:00
parent b5ca7fefc4
commit 3a47c7e8f6
1 changed files with 9 additions and 2 deletions
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11
nixos/modules/system/boot/grow-partition.nix
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@ -32,8 +32,15 @@ with lib;
rootDevice="${config.fileSystems."/".device}"
if [ -e "$rootDevice" ]; then
rootDevice="$(readlink -f "$rootDevice")"
parentDevice="$(lsblk -npo PKNAME "$rootDevice")"
TMPDIR=/run sh $(type -P growpart) "$parentDevice" "''${rootDevice#$parentDevice}"
parentDevice="$rootDevice"
while [ "''${parentDevice%[0-9]}" != "''${parentDevice}" ]; do
parentDevice="''${parentDevice%[0-9]}";
done
partNum="''${rootDevice#''${parentDevice}}"
if [ "''${parentDevice%[0-9]p}" != "''${parentDevice}" ] && [ -b "''${parentDevice%p}" ]; then
parentDevice="''${parentDevice%p}"
fi
TMPDIR=/run sh $(type -P growpart) "$parentDevice" "$partNum"
udevadm settle
fi
'';