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import ./make-test-python.nix ({ pkgs, ... }: {
name = "overlayfs";
meta.maintainers = with pkgs.lib.maintainers; [ bachp ];
machine = { pkgs, ... }: {
virtualisation.emptyDiskImages = [ 512 ];
networking.hostId = "deadbeef";
environment.systemPackages = with pkgs; [ parted ];
};
testScript = ''
machine.succeed("ls /dev")
machine.succeed("mkdir -p /tmp/mnt")
# Test ext4 + overlayfs
machine.succeed(
'mkfs.ext4 -F -L overlay-ext4 /dev/vdb',
'mount -t ext4 /dev/vdb /tmp/mnt',
'mkdir -p /tmp/mnt/upper /tmp/mnt/lower /tmp/mnt/work /tmp/mnt/merged',
# Setup some existing files
'echo Replace > /tmp/mnt/lower/replace.txt',
'echo Append > /tmp/mnt/lower/append.txt',
'echo Overwrite > /tmp/mnt/lower/overwrite.txt',
'mount -t overlay overlay -o lowerdir=/tmp/mnt/lower,upperdir=/tmp/mnt/upper,workdir=/tmp/mnt/work /tmp/mnt/merged',
# Test new
'echo New > /tmp/mnt/merged/new.txt',
'[[ "$(cat /tmp/mnt/merged/new.txt)" == New ]]',
# Test replace
'[[ "$(cat /tmp/mnt/merged/replace.txt)" == Replace ]]',
'echo Replaced > /tmp/mnt/merged/replace-tmp.txt',
'mv /tmp/mnt/merged/replace-tmp.txt /tmp/mnt/merged/replace.txt',
'[[ "$(cat /tmp/mnt/merged/replace.txt)" == Replaced ]]',
# Overwrite
'[[ "$(cat /tmp/mnt/merged/overwrite.txt)" == Overwrite ]]',
'echo Overwritten > /tmp/mnt/merged/overwrite.txt',
'[[ "$(cat /tmp/mnt/merged/overwrite.txt)" == Overwritten ]]',
# Test append
'[[ "$(cat /tmp/mnt/merged/append.txt)" == Append ]]',
'echo ed >> /tmp/mnt/merged/append.txt',
'[[ "$(cat /tmp/mnt/merged/append.txt)" == "Append\ned" ]]',
'umount /tmp/mnt/merged',
'umount /tmp/mnt',
'udevadm settle',
)
'';
})
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