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nixosTests.systemd: test cryptsetup support

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This creates and opens a luks volume, puts its passphrase into a keyfile
and writes a /etc/crypttab. It then reboots the machine, and verifies
systemd parsed /etc/crypttab properly, and was able to unlock the volume
with the keyfile provided (as we try to mount it).

The memorySize of the VM had to be bumped, as luksFormat would otherwise
run out of memory.
This commit is contained in:
Florian Klink 2020-08-05 01:34:12 +02:00
parent 29941db6bd
commit eb58711edf
1 changed files with 24 additions and 1 deletions
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25
nixos/tests/systemd.nix
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@ -4,7 +4,10 @@ import ./make-test-python.nix ({ pkgs, ... }: {
machine = { lib, ... }: {
imports = [ common/user-account.nix common/x11.nix ];
virtualisation.emptyDiskImages = [ 512 ];
virtualisation.emptyDiskImages = [ 512 512 ];
virtualisation.memorySize = 1024;
environment.systemPackages = [ pkgs.cryptsetup ];
fileSystems = lib.mkVMOverride {
"/test-x-initrd-mount" = {
@ -144,5 +147,25 @@ import ./make-test-python.nix ({ pkgs, ... }: {
assert "RuntimeWatchdogUSec=30s" in output
assert "RebootWatchdogUSec=10m" in output
assert "KExecWatchdogUSec=5m" in output
# Test systemd cryptsetup support
with subtest("systemd successfully reads /etc/crypttab and unlocks volumes"):
# create a luks volume and put a filesystem on it
machine.succeed(
"echo -n supersecret | cryptsetup luksFormat -q /dev/vdc -",
"echo -n supersecret | cryptsetup luksOpen --key-file - /dev/vdc foo",
"mkfs.ext3 /dev/mapper/foo",
)
# create a keyfile and /etc/crypttab
machine.succeed("echo -n supersecret > /var/lib/luks-keyfile")
machine.succeed("chmod 600 /var/lib/luks-keyfile")
machine.succeed("echo 'luks1 /dev/vdc /var/lib/luks-keyfile luks' > /etc/crypttab")
# after a reboot, systemd should unlock the volume and we should be able to mount it
machine.shutdown()
machine.succeed("systemctl status systemd-cryptsetup@luks1.service")
machine.succeed("mkdir -p /tmp/luks1")
machine.succeed("mount /dev/mapper/luks1 /tmp/luks1")
'';
})