nixos/tests/systemd-nspawn-configfile: init

Test for presence of all specified options in the generated .nspawn
config file.
Additionally test for absence of misspelled and fixed option MachineID.

nixos/tests/all-tests.nix

@@ -744,6 +744,7 @@ in {
   systemd-networkd-vrf = handleTest ./systemd-networkd-vrf.nix {};
   systemd-no-tainted = handleTest ./systemd-no-tainted.nix {};
   systemd-nspawn = handleTest ./systemd-nspawn.nix {};
+  systemd-nspawn-configfile = handleTest ./systemd-nspawn-configfile.nix {};
   systemd-oomd = handleTest ./systemd-oomd.nix {};
   systemd-portabled = handleTest ./systemd-portabled.nix {};
   systemd-repart = handleTest ./systemd-repart.nix {};

nixos/tests/systemd-nspawn-configfile.nix

@@ -0,0 +1,128 @@
+import ./make-test-python.nix ({ lib, ... }:
+let
+  execOptions = [
+    "Boot"
+    "ProcessTwo"
+    "Parameters"
+    "Environment"
+    "User"
+    "WorkingDirectory"
+    "PivotRoot"
+    "Capability"
+    "DropCapability"
+    "NoNewPrivileges"
+    "KillSignal"
+    "Personality"
+    "MachineID"
+    "PrivateUsers"
+    "NotifyReady"
+    "SystemCallFilter"
+    "LimitCPU"
+    "LimitFSIZE"
+    "LimitDATA"
+    "LimitSTACK"
+    "LimitCORE"
+    "LimitRSS"
+    "LimitNOFILE"
+    "LimitAS"
+    "LimitNPROC"
+    "LimitMEMLOCK"
+    "LimitLOCKS"
+    "LimitSIGPENDING"
+    "LimitMSGQUEUE"
+    "LimitNICE"
+    "LimitRTPRIO"
+    "LimitRTTIME"
+    "OOMScoreAdjust"
+    "CPUAffinity"
+    "Hostname"
+    "ResolvConf"
+    "Timezone"
+    "LinkJournal"
+    "Ephemeral"
+    "AmbientCapability"
+  ];
+
+  filesOptions = [
+    "ReadOnly"
+    "Volatile"
+    "Bind"
+    "BindReadOnly"
+    "TemporaryFileSystem"
+    "Overlay"
+    "OverlayReadOnly"
+    "PrivateUsersChown"
+    "BindUser"
+    "Inaccessible"
+    "PrivateUsersOwnership"
+  ];
+
+  networkOptions = [
+    "Private"
+    "VirtualEthernet"
+    "VirtualEthernetExtra"
+    "Interface"
+    "MACVLAN"
+    "IPVLAN"
+    "Bridge"
+    "Zone"
+    "Port"
+  ];
+
+  optionsToConfig = opts: builtins.listToAttrs (map (n: lib.nameValuePair n "testdata") opts);
+
+  grepForOptions = opts: ''node.succeed(
+    "for o in ${builtins.concatStringsSep " " opts} ; do grep --quiet $o ${configFile} || exit 1 ; done"
+  )'';
+
+  unitName = "options-test";
+  configFile = "/etc/systemd/nspawn/${unitName}.nspawn";
+
+in
+{
+  name = "systemd-nspawn-configfile";
+
+  nodes = {
+    node = { pkgs, ... }: {
+      systemd.nspawn."${unitName}" = {
+        enable = true;
+
+        execConfig = optionsToConfig execOptions // {
+          Boot = true;
+          ProcessTwo = true;
+          NotifyReady = true;
+        };
+
+        filesConfig = optionsToConfig filesOptions // {
+          ReadOnly = true;
+          Volatile = "state";
+          PrivateUsersChown = true;
+          PrivateUsersOwnership = "auto";
+        };
+
+        networkConfig = optionsToConfig networkOptions // {
+          Private = true;
+          VirtualEthernet = true;
+        };
+      };
+    };
+  };
+
+  testScript = ''
+    start_all()
+
+    node.wait_for_file("${configFile}")
+
+    with subtest("Test for presence of all specified options in config file"):
+      ${grepForOptions execOptions}
+      ${grepForOptions filesOptions}
+      ${grepForOptions networkOptions}
+
+    with subtest("Test for absence of misspelled option 'MachineId' (instead of 'MachineID')"):
+      node.fail("grep --quiet MachineId ${configFile}")
+  '';
+
+  meta.maintainers = [
+    lib.maintainers.zi3m5f
+  ];
+})