nixpkgs/nixos/tests/switch-test.nix

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# Test configuration switching.
import ./make-test-python.nix ({ lib, pkgs, ...} : let
# Simple service that can either be socket-activated or that will
# listen on port 1234 if not socket-activated.
# A connection to the socket causes 'hello' to be written to the client.
socketTest = pkgs.writeScript "socket-test.py" /* python */ ''
#!${pkgs.python3}/bin/python3
from socketserver import TCPServer, StreamRequestHandler
import socket
import os
class Handler(StreamRequestHandler):
def handle(self):
self.wfile.write("hello".encode("utf-8"))
class Server(TCPServer):
def __init__(self, server_address, handler_cls):
listenFds = os.getenv('LISTEN_FDS')
if listenFds is None or int(listenFds) < 1:
print(f'Binding to {server_address}')
TCPServer.__init__(
self, server_address, handler_cls, bind_and_activate=True)
else:
TCPServer.__init__(
self, server_address, handler_cls, bind_and_activate=False)
# Override socket
print(f'Got activated by {os.getenv("LISTEN_FDNAMES")} '
f'with {listenFds} FDs')
self.socket = socket.fromfd(3, self.address_family,
self.socket_type)
if __name__ == "__main__":
server = Server(("localhost", 1234), Handler)
server.serve_forever()
'';
in {
name = "switch-test";
meta = with pkgs.lib.maintainers; {
maintainers = [ gleber das_j ];
};
nodes = {
machine = { pkgs, lib, ... }: {
environment.systemPackages = [ pkgs.socat ]; # for the socket activation stuff
users.mutableUsers = false;
# For boot/switch testing
system.build.installBootLoader = lib.mkForce (pkgs.writeShellScript "install-dummy-loader" ''
echo "installing dummy bootloader"
touch /tmp/bootloader-installed
'');
specialisation = rec {
simpleService.configuration = {
systemd.services.test = {
wantedBy = [ "multi-user.target" ];
serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
ExecStart = "${pkgs.coreutils}/bin/true";
ExecReload = "${pkgs.coreutils}/bin/true";
};
};
};
simpleServiceSeparateActivationScript.configuration = {
system.activatable = false;
systemd.services.test = {
wantedBy = [ "multi-user.target" ];
serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
ExecStart = "${pkgs.coreutils}/bin/true";
ExecReload = "${pkgs.coreutils}/bin/true";
};
};
};
simpleServiceDifferentDescription.configuration = {
imports = [ simpleService.configuration ];
systemd.services.test.description = "Test unit";
};
simpleServiceModified.configuration = {
imports = [ simpleService.configuration ];
systemd.services.test.serviceConfig.X-Test = true;
};
simpleServiceNostop.configuration = {
imports = [ simpleService.configuration ];
systemd.services.test.stopIfChanged = false;
};
simpleServiceReload.configuration = {
imports = [ simpleService.configuration ];
systemd.services.test = {
reloadIfChanged = true;
serviceConfig.ExecReload = "${pkgs.coreutils}/bin/true";
};
};
simpleServiceNorestart.configuration = {
imports = [ simpleService.configuration ];
systemd.services.test.restartIfChanged = false;
};
simpleServiceFailing.configuration = {
imports = [ simpleServiceModified.configuration ];
systemd.services.test.serviceConfig.ExecStart = lib.mkForce "${pkgs.coreutils}/bin/false";
};
autorestartService.configuration = {
# A service that immediately goes into restarting (but without failing)
systemd.services.autorestart = {
wantedBy = [ "multi-user.target" ];
serviceConfig = {
Type = "simple";
Restart = "always";
RestartSec = "20y"; # Should be long enough
ExecStart = "${pkgs.coreutils}/bin/true";
};
};
};
autorestartServiceFailing.configuration = {
imports = [ autorestartService.configuration ];
systemd.services.autorestart.serviceConfig = {
ExecStart = lib.mkForce "${pkgs.coreutils}/bin/false";
};
};
simpleServiceWithExtraSection.configuration = {
imports = [ simpleServiceNostop.configuration ];
systemd.packages = [ (pkgs.writeTextFile {
name = "systemd-extra-section";
destination = "/etc/systemd/system/test.service";
text = ''
[X-Test]
X-Test-Value=a
'';
}) ];
};
simpleServiceWithExtraSectionOtherName.configuration = {
imports = [ simpleServiceNostop.configuration ];
systemd.packages = [ (pkgs.writeTextFile {
name = "systemd-extra-section";
destination = "/etc/systemd/system/test.service";
text = ''
[X-Test2]
X-Test-Value=a
'';
}) ];
};
simpleServiceWithInstallSection.configuration = {
imports = [ simpleServiceNostop.configuration ];
systemd.packages = [ (pkgs.writeTextFile {
name = "systemd-extra-section";
destination = "/etc/systemd/system/test.service";
text = ''
[Install]
WantedBy=multi-user.target
'';
}) ];
};
simpleServiceWithExtraKey.configuration = {
imports = [ simpleServiceNostop.configuration ];
systemd.services.test.serviceConfig."X-Test" = "test";
};
simpleServiceWithExtraKeyOtherValue.configuration = {
imports = [ simpleServiceNostop.configuration ];
systemd.services.test.serviceConfig."X-Test" = "test2";
};
simpleServiceWithExtraKeyOtherName.configuration = {
imports = [ simpleServiceNostop.configuration ];
systemd.services.test.serviceConfig."X-Test2" = "test";
};
simpleServiceReloadTrigger.configuration = {
imports = [ simpleServiceNostop.configuration ];
systemd.services.test.reloadTriggers = [ "/dev/null" ];
};
simpleServiceReloadTriggerModified.configuration = {
imports = [ simpleServiceNostop.configuration ];
systemd.services.test.reloadTriggers = [ "/dev/zero" ];
};
simpleServiceReloadTriggerModifiedAndSomethingElse.configuration = {
imports = [ simpleServiceNostop.configuration ];
systemd.services.test = {
reloadTriggers = [ "/dev/zero" ];
serviceConfig."X-Test" = "test";
};
};
simpleServiceReloadTriggerModifiedSomethingElse.configuration = {
imports = [ simpleServiceNostop.configuration ];
systemd.services.test.serviceConfig."X-Test" = "test";
};
unitWithBackslash.configuration = {
systemd.services."escaped\\x2ddash" = {
wantedBy = [ "multi-user.target" ];
serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
ExecStart = "${pkgs.coreutils}/bin/true";
ExecReload = "${pkgs.coreutils}/bin/true";
};
};
};
unitWithBackslashModified.configuration = {
imports = [ unitWithBackslash.configuration ];
systemd.services."escaped\\x2ddash".serviceConfig.X-Test = "test";
};
unitStartingWithDash.configuration = {
systemd.services."-" = {
wantedBy = [ "multi-user.target" ];
serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
ExecStart = "${pkgs.coreutils}/bin/true";
};
};
};
unitStartingWithDashModified.configuration = {
imports = [ unitStartingWithDash.configuration ];
systemd.services."-" = {
reloadIfChanged = true;
serviceConfig.ExecReload = "${pkgs.coreutils}/bin/true";
};
};
unitWithRequirement.configuration = {
systemd.services.required-service = {
wantedBy = [ "multi-user.target" ];
serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
ExecStart = "${pkgs.coreutils}/bin/true";
ExecReload = "${pkgs.coreutils}/bin/true";
};
};
systemd.services.test-service = {
wantedBy = [ "multi-user.target" ];
requires = [ "required-service.service" ];
serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
ExecStart = "${pkgs.coreutils}/bin/true";
ExecReload = "${pkgs.coreutils}/bin/true";
};
};
};
unitWithRequirementModified.configuration = {
imports = [ unitWithRequirement.configuration ];
systemd.services.required-service.serviceConfig.X-Test = "test";
systemd.services.test-service.reloadTriggers = [ "test" ];
};
unitWithRequirementModifiedNostart.configuration = {
imports = [ unitWithRequirement.configuration ];
systemd.services.test-service.unitConfig.RefuseManualStart = true;
};
unitWithTemplate.configuration = {
systemd.services."instantiated@".serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
ExecStart = "${pkgs.coreutils}/bin/true";
ExecReload = "${pkgs.coreutils}/bin/true";
};
systemd.services."instantiated@one" = {
wantedBy = [ "multi-user.target" ];
overrideStrategy = "asDropin";
};
systemd.services."instantiated@two" = {
wantedBy = [ "multi-user.target" ];
overrideStrategy = "asDropin";
};
};
unitWithTemplateModified.configuration = {
imports = [ unitWithTemplate.configuration ];
systemd.services."instantiated@".serviceConfig.X-Test = "test";
};
restart-and-reload-by-activation-script.configuration = {
systemd.services = rec {
simple-service = {
# No wantedBy so we can check if the activation script restart triggers them
serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
ExecStart = "${pkgs.coreutils}/bin/true";
ExecReload = "${pkgs.coreutils}/bin/true";
};
};
"templated-simple-service@" = simple-service;
"templated-simple-service@instance".overrideStrategy = "asDropin";
simple-restart-service = simple-service // {
stopIfChanged = false;
};
"templated-simple-restart-service@" = simple-restart-service;
"templated-simple-restart-service@instance".overrideStrategy = "asDropin";
simple-reload-service = simple-service // {
reloadIfChanged = true;
};
"templated-simple-reload-service@" = simple-reload-service;
"templated-simple-reload-service@instance".overrideStrategy = "asDropin";
no-restart-service = simple-service // {
restartIfChanged = false;
};
"templated-no-restart-service@" = no-restart-service;
"templated-no-restart-service@instance".overrideStrategy = "asDropin";
reload-triggers = simple-service // {
wantedBy = [ "multi-user.target" ];
};
"templated-reload-triggers@" = simple-service;
"templated-reload-triggers@instance" = {
overrideStrategy = "asDropin";
wantedBy = [ "multi-user.target" ];
};
reload-triggers-and-restart-by-as = simple-service;
"templated-reload-triggers-and-restart-by-as@" = reload-triggers-and-restart-by-as;
"templated-reload-triggers-and-restart-by-as@instance".overrideStrategy = "asDropin";
reload-triggers-and-restart = simple-service // {
stopIfChanged = false; # easier to check for this
wantedBy = [ "multi-user.target" ];
};
"templated-reload-triggers-and-restart@" = simple-service;
"templated-reload-triggers-and-restart@instance" = {
overrideStrategy = "asDropin";
stopIfChanged = false; # easier to check for this
wantedBy = [ "multi-user.target" ];
};
};
system.activationScripts.restart-and-reload-test = {
supportsDryActivation = true;
deps = [];
text = ''
if [ "$NIXOS_ACTION" = dry-activate ]; then
f=/run/nixos/dry-activation-restart-list
g=/run/nixos/dry-activation-reload-list
else
f=/run/nixos/activation-restart-list
g=/run/nixos/activation-reload-list
fi
cat <<EOF >> "$f"
simple-service.service
simple-restart-service.service
simple-reload-service.service
no-restart-service.service
reload-triggers-and-restart-by-as.service
templated-simple-service@instance.service
templated-simple-restart-service@instance.service
templated-simple-reload-service@instance.service
templated-no-restart-service@instance.service
templated-reload-triggers-and-restart-by-as@instance.service
EOF
cat <<EOF >> "$g"
reload-triggers.service
reload-triggers-and-restart-by-as.service
reload-triggers-and-restart.service
templated-reload-triggers@instance.service
templated-reload-triggers-and-restart-by-as@instance.service
templated-reload-triggers-and-restart@instance.service
EOF
'';
};
};
restart-and-reload-by-activation-script-modified.configuration = {
imports = [ restart-and-reload-by-activation-script.configuration ];
systemd.services.reload-triggers-and-restart.serviceConfig.X-Modified = "test";
systemd.services."templated-reload-triggers-and-restart@instance" = {
overrideStrategy = "asDropin";
serviceConfig.X-Modified = "test";
};
};
simple-socket.configuration = {
systemd.services.socket-activated = {
description = "A socket-activated service";
stopIfChanged = lib.mkDefault false;
serviceConfig = {
ExecStart = socketTest;
ExecReload = "${pkgs.coreutils}/bin/true";
};
};
systemd.sockets.socket-activated = {
wantedBy = [ "sockets.target" ];
listenStreams = [ "/run/test.sock" ];
socketConfig.SocketMode = lib.mkDefault "0777";
};
};
simple-socket-service-modified.configuration = {
imports = [ simple-socket.configuration ];
systemd.services.socket-activated.serviceConfig.X-Test = "test";
};
simple-socket-stop-if-changed.configuration = {
imports = [ simple-socket.configuration ];
systemd.services.socket-activated.stopIfChanged = true;
};
simple-socket-stop-if-changed-and-reloadtrigger.configuration = {
imports = [ simple-socket.configuration ];
systemd.services.socket-activated = {
stopIfChanged = true;
reloadTriggers = [ "test" ];
};
};
mount.configuration = {
systemd.mounts = [
{
description = "Testmount";
what = "tmpfs";
type = "tmpfs";
where = "/testmount";
options = "size=1M";
wantedBy = [ "local-fs.target" ];
}
];
};
mountOptionsModified.configuration = {
systemd.mounts = [
{
description = "Testmount";
what = "tmpfs";
type = "tmpfs";
where = "/testmount";
options = "size=10M";
wantedBy = [ "local-fs.target" ];
}
];
};
mountModified.configuration = {
systemd.mounts = [
{
description = "Testmount";
what = "ramfs";
type = "ramfs";
where = "/testmount";
options = "size=10M";
wantedBy = [ "local-fs.target" ];
}
];
};
timer.configuration = {
systemd.timers.test-timer = {
wantedBy = [ "timers.target" ];
timerConfig.OnCalendar = "@1395716396"; # chosen by fair dice roll
};
systemd.services.test-timer = {
serviceConfig = {
Type = "oneshot";
ExecStart = "${pkgs.coreutils}/bin/true";
};
};
};
timerModified.configuration = {
imports = [ timer.configuration ];
systemd.timers.test-timer.timerConfig.OnCalendar = lib.mkForce "Fri 2012-11-23 16:00:00";
};
2022-03-06 13:52:54 +00:00
hybridSleepModified.configuration = {
systemd.targets.hybrid-sleep.unitConfig.X-Test = true;
};
target.configuration = {
systemd.targets.test-target.wantedBy = [ "multi-user.target" ];
# We use this service to figure out whether the target was modified.
# This is the only way because targets are filtered and therefore not
# printed when they are started/stopped.
systemd.services.test-service = {
bindsTo = [ "test-target.target" ];
serviceConfig.ExecStart = "${pkgs.coreutils}/bin/sleep infinity";
};
};
targetModified.configuration = {
imports = [ target.configuration ];
systemd.targets.test-target.unitConfig.X-Test = true;
};
targetModifiedStopOnReconfig.configuration = {
imports = [ target.configuration ];
systemd.targets.test-target.unitConfig.X-StopOnReconfiguration = true;
};
path.configuration = {
systemd.paths.test-watch = {
wantedBy = [ "paths.target" ];
pathConfig.PathExists = "/testpath";
};
systemd.services.test-watch = {
serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
ExecStart = "${pkgs.coreutils}/bin/touch /testpath-modified";
};
};
};
pathModified.configuration = {
imports = [ path.configuration ];
systemd.paths.test-watch.pathConfig.PathExists = lib.mkForce "/testpath2";
};
slice.configuration = {
systemd.slices.testslice.sliceConfig.MemoryMax = "1"; # don't allow memory allocation
systemd.services.testservice = {
serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
ExecStart = "${pkgs.coreutils}/bin/true";
Slice = "testslice.slice";
};
};
};
sliceModified.configuration = {
imports = [ slice.configuration ];
systemd.slices.testslice.sliceConfig.MemoryMax = lib.mkForce null;
};
};
};
other = {
users.mutableUsers = true;
};
};
testScript = { nodes, ... }: let
originalSystem = nodes.machine.system.build.toplevel;
otherSystem = nodes.other.system.build.toplevel;
machine = nodes.machine.system.build.toplevel;
# Ensures failures pass through using pipefail, otherwise failing to
# switch-to-configuration is hidden by the success of `tee`.
stderrRunner = pkgs.writeScript "stderr-runner" ''
#! ${pkgs.runtimeShell}
set -e
set -o pipefail
exec env -i "$@" | tee /dev/stderr
'';
# Returns a comma separated representation of the given list in sorted
# order, that matches the output format of switch-to-configuration.pl
sortedUnits = xs: lib.concatStringsSep ", " (builtins.sort builtins.lessThan xs);
in /* python */ ''
def switch_to_specialisation(system, name, action="test", fail=False):
if name == "":
switcher = f"{system}/bin/switch-to-configuration"
else:
switcher = f"{system}/specialisation/{name}/bin/switch-to-configuration"
return run_switch(switcher, action, fail)
# like above but stc = switcher
def run_switch(switcher, action="test", fail=False):
out = machine.fail(f"{switcher} {action} 2>&1") if fail \
else machine.succeed(f"{switcher} {action} 2>&1")
assert_lacks(out, "switch-to-configuration line") # Perl warnings
return out
def assert_contains(haystack, needle):
if needle not in haystack:
print("The haystack that will cause the following exception is:")
print("---")
print(haystack)
print("---")
raise Exception(f"Expected string '{needle}' was not found")
def assert_lacks(haystack, needle):
if needle in haystack:
print("The haystack that will cause the following exception is:")
print("---")
print(haystack, end="")
print("---")
raise Exception(f"Unexpected string '{needle}' was found")
machine.wait_for_unit("multi-user.target")
machine.succeed(
"${stderrRunner} ${originalSystem}/bin/switch-to-configuration test"
)
# This tests whether the /etc/os-release parser works which is a fallback
# when /etc/NIXOS is missing. If the parser does not work, switch-to-configuration
# would fail.
machine.succeed("rm /etc/NIXOS")
machine.succeed(
"${stderrRunner} ${otherSystem}/bin/switch-to-configuration test"
)
with subtest("actions"):
# boot action
machine.fail("test -f /tmp/bootloader-installed")
out = switch_to_specialisation("${machine}", "simpleService", action="boot")
assert_contains(out, "installing dummy bootloader")
assert_lacks(out, "activating the configuration...") # good indicator of a system activation
machine.succeed("test -f /tmp/bootloader-installed")
machine.succeed("rm /tmp/bootloader-installed")
# switch action
machine.fail("test -f /tmp/bootloader-installed")
out = switch_to_specialisation("${machine}", "", action="switch")
assert_contains(out, "installing dummy bootloader")
assert_contains(out, "activating the configuration...") # good indicator of a system activation
machine.succeed("test -f /tmp/bootloader-installed")
# test and dry-activate actions are tested further down below
with subtest("services"):
switch_to_specialisation("${machine}", "")
# Nothing happens when nothing is changed
out = switch_to_specialisation("${machine}", "")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
# Start a simple service
out = switch_to_specialisation("${machine}", "simpleService")
assert_lacks(out, "installing dummy bootloader") # test does not install a bootloader
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_contains(out, "reloading the following units: dbus.service\n") # huh
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_contains(out, "the following new units were started: test.service\n")
# Not changing anything doesn't do anything
out = switch_to_specialisation("${machine}", "simpleService")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
# Only changing the description does nothing
out = switch_to_specialisation("${machine}", "simpleServiceDifferentDescription")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
# Restart the simple service
out = switch_to_specialisation("${machine}", "simpleServiceModified")
assert_contains(out, "stopping the following units: test.service\n")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_contains(out, "\nstarting the following units: test.service\n")
assert_lacks(out, "the following new units were started:")
# Restart the service with stopIfChanged=false
out = switch_to_specialisation("${machine}", "simpleServiceNostop")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_contains(out, "\nrestarting the following units: test.service\n")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
# Reload the service with reloadIfChanged=true
out = switch_to_specialisation("${machine}", "simpleServiceReload")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_contains(out, "reloading the following units: test.service\n")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
# Nothing happens when restartIfChanged=false
out = switch_to_specialisation("${machine}", "simpleServiceNorestart")
assert_lacks(out, "stopping the following units:")
assert_contains(out, "NOT restarting the following changed units: test.service\n")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
# Dry mode shows different messages
out = switch_to_specialisation("${machine}", "simpleService", action="dry-activate")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
assert_contains(out, "would start the following units: test.service\n")
out = switch_to_specialisation("${machine}", "", action="test")
# Ensure the service can be started when the activation script isn't in toplevel
# This is a lot like "Start a simple service", except activation-only deps could be gc-ed
out = run_switch("${nodes.machine.specialisation.simpleServiceSeparateActivationScript.configuration.system.build.separateActivationScript}/bin/switch-to-configuration");
assert_lacks(out, "installing dummy bootloader") # test does not install a bootloader
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_contains(out, "reloading the following units: dbus.service\n") # huh
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_contains(out, "the following new units were started: test.service\n")
machine.succeed("! test -e /run/current-system/activate")
machine.succeed("! test -e /run/current-system/dry-activate")
machine.succeed("! test -e /run/current-system/bin/switch-to-configuration")
# Ensure \ works in unit names
out = switch_to_specialisation("${machine}", "unitWithBackslash")
assert_contains(out, "stopping the following units: test.service\n")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_contains(out, "the following new units were started: escaped\\x2ddash.service\n")
out = switch_to_specialisation("${machine}", "unitWithBackslashModified")
assert_contains(out, "stopping the following units: escaped\\x2ddash.service\n")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_contains(out, "\nstarting the following units: escaped\\x2ddash.service\n")
assert_lacks(out, "the following new units were started:")
# Ensure units can start with a dash
out = switch_to_specialisation("${machine}", "unitStartingWithDash")
assert_contains(out, "stopping the following units: escaped\\x2ddash.service\n")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_contains(out, "the following new units were started: -.service\n")
# The regression only occurs when reloading units
out = switch_to_specialisation("${machine}", "unitStartingWithDashModified")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_contains(out, "reloading the following units: -.service")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
# Ensure units that require changed units are properly reloaded
out = switch_to_specialisation("${machine}", "unitWithRequirement")
assert_contains(out, "stopping the following units: -.service\n")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_contains(out, "the following new units were started: required-service.service, test-service.service\n")
out = switch_to_specialisation("${machine}", "unitWithRequirementModified")
assert_contains(out, "stopping the following units: required-service.service\n")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_contains(out, "\nstarting the following units: required-service.service, test-service.service\n")
assert_lacks(out, "the following new units were started:")
# Unless the unit asks to be not restarted
out = switch_to_specialisation("${machine}", "unitWithRequirementModifiedNostart")
assert_contains(out, "stopping the following units: required-service.service\n")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_contains(out, "\nstarting the following units: required-service.service\n")
assert_lacks(out, "the following new units were started:")
# Ensure templated units are restarted when the base unit changes
switch_to_specialisation("${machine}", "unitWithTemplate")
out = switch_to_specialisation("${machine}", "unitWithTemplateModified")
assert_contains(out, "stopping the following units: instantiated@one.service, instantiated@two.service\n")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_contains(out, "\nstarting the following units: instantiated@one.service, instantiated@two.service\n")
assert_lacks(out, "the following new units were started:")
with subtest("failing units"):
# Let the simple service fail
switch_to_specialisation("${machine}", "simpleServiceModified")
out = switch_to_specialisation("${machine}", "simpleServiceFailing", fail=True)
assert_contains(out, "stopping the following units: test.service\n")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_contains(out, "\nstarting the following units: test.service\n")
assert_lacks(out, "the following new units were started:")
assert_contains(out, "warning: the following units failed: test.service\n")
assert_contains(out, "Main PID:") # output of systemctl
# A unit that gets into autorestart without failing is not treated as failed
out = switch_to_specialisation("${machine}", "autorestartService")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_contains(out, "the following new units were started: autorestart.service\n")
machine.systemctl('stop autorestart.service') # cancel the 20y timer
# Switching to the same system should do nothing (especially not treat the unit as failed)
out = switch_to_specialisation("${machine}", "autorestartService")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_contains(out, "the following new units were started: autorestart.service\n")
machine.systemctl('stop autorestart.service') # cancel the 20y timer
# If systemd thinks the unit has failed and is in autorestart, we should show it as failed
out = switch_to_specialisation("${machine}", "autorestartServiceFailing", fail=True)
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
assert_contains(out, "warning: the following units failed: autorestart.service\n")
assert_contains(out, "Main PID:") # output of systemctl
with subtest("unit file parser"):
# Switch to a well-known state
switch_to_specialisation("${machine}", "simpleServiceNostop")
# Add a section
out = switch_to_specialisation("${machine}", "simpleServiceWithExtraSection")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_contains(out, "\nrestarting the following units: test.service\n")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
# Rename it
out = switch_to_specialisation("${machine}", "simpleServiceWithExtraSectionOtherName")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_contains(out, "\nrestarting the following units: test.service\n")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
# Remove it
out = switch_to_specialisation("${machine}", "simpleServiceNostop")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_contains(out, "\nrestarting the following units: test.service\n")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
# [Install] section is ignored
out = switch_to_specialisation("${machine}", "simpleServiceWithInstallSection")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
# Add a key
out = switch_to_specialisation("${machine}", "simpleServiceWithExtraKey")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_contains(out, "\nrestarting the following units: test.service\n")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
# Change its value
out = switch_to_specialisation("${machine}", "simpleServiceWithExtraKeyOtherValue")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_contains(out, "\nrestarting the following units: test.service\n")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
# Rename it
out = switch_to_specialisation("${machine}", "simpleServiceWithExtraKeyOtherName")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_contains(out, "\nrestarting the following units: test.service\n")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
# Remove it
out = switch_to_specialisation("${machine}", "simpleServiceNostop")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_contains(out, "\nrestarting the following units: test.service\n")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
# Add a reload trigger
out = switch_to_specialisation("${machine}", "simpleServiceReloadTrigger")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_contains(out, "reloading the following units: test.service\n")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
# Modify the reload trigger
out = switch_to_specialisation("${machine}", "simpleServiceReloadTriggerModified")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_contains(out, "reloading the following units: test.service\n")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
# Modify the reload trigger and something else
out = switch_to_specialisation("${machine}", "simpleServiceReloadTriggerModifiedAndSomethingElse")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_contains(out, "\nrestarting the following units: test.service\n")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
# Remove the reload trigger
out = switch_to_specialisation("${machine}", "simpleServiceReloadTriggerModifiedSomethingElse")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
with subtest("restart and reload by activation script"):
switch_to_specialisation("${machine}", "simpleServiceNorestart")
out = switch_to_specialisation("${machine}", "restart-and-reload-by-activation-script")
assert_contains(out, "stopping the following units: test.service\n")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "restarting the following units:")
assert_contains(out, "\nstarting the following units: ${sortedUnits [
"no-restart-service.service"
"reload-triggers-and-restart-by-as.service"
"simple-reload-service.service"
"simple-restart-service.service"
"simple-service.service"
"templated-no-restart-service@instance.service"
"templated-reload-triggers-and-restart-by-as@instance.service"
"templated-simple-reload-service@instance.service"
"templated-simple-restart-service@instance.service"
"templated-simple-service@instance.service"
]}\n")
assert_contains(out, "the following new units were started: ${sortedUnits [
"no-restart-service.service"
"reload-triggers-and-restart-by-as.service"
"reload-triggers-and-restart.service"
"reload-triggers.service"
"simple-reload-service.service"
"simple-restart-service.service"
"simple-service.service"
"system-templated\\\\x2dno\\\\x2drestart\\\\x2dservice.slice"
"system-templated\\\\x2dreload\\\\x2dtriggers.slice"
"system-templated\\\\x2dreload\\\\x2dtriggers\\\\x2dand\\\\x2drestart.slice"
"system-templated\\\\x2dreload\\\\x2dtriggers\\\\x2dand\\\\x2drestart\\\\x2dby\\\\x2das.slice"
"system-templated\\\\x2dsimple\\\\x2dreload\\\\x2dservice.slice"
"system-templated\\\\x2dsimple\\\\x2drestart\\\\x2dservice.slice"
"system-templated\\\\x2dsimple\\\\x2dservice.slice"
"templated-no-restart-service@instance.service"
"templated-reload-triggers-and-restart-by-as@instance.service"
"templated-reload-triggers-and-restart@instance.service"
"templated-reload-triggers@instance.service"
"templated-simple-reload-service@instance.service"
"templated-simple-restart-service@instance.service"
"templated-simple-service@instance.service"
]}\n")
# Switch to the same system where the example services get restarted
# and reloaded by the activation script
out = switch_to_specialisation("${machine}", "restart-and-reload-by-activation-script")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_contains(out, "reloading the following units: ${sortedUnits [
"reload-triggers-and-restart.service"
"reload-triggers.service"
"simple-reload-service.service"
"templated-reload-triggers-and-restart@instance.service"
"templated-reload-triggers@instance.service"
"templated-simple-reload-service@instance.service"
]}\n")
assert_contains(out, "restarting the following units: ${sortedUnits [
"reload-triggers-and-restart-by-as.service"
"simple-restart-service.service"
"simple-service.service"
"templated-reload-triggers-and-restart-by-as@instance.service"
"templated-simple-restart-service@instance.service"
"templated-simple-service@instance.service"
]}\n")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
# Switch to the same system and see if the service gets restarted when it's modified
# while the fact that it's supposed to be reloaded by the activation script is ignored.
out = switch_to_specialisation("${machine}", "restart-and-reload-by-activation-script-modified")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_contains(out, "reloading the following units: ${sortedUnits [
"reload-triggers.service"
"simple-reload-service.service"
"templated-reload-triggers@instance.service"
"templated-simple-reload-service@instance.service"
]}\n")
assert_contains(out, "restarting the following units: ${sortedUnits [
"reload-triggers-and-restart-by-as.service"
"reload-triggers-and-restart.service"
"simple-restart-service.service"
"simple-service.service"
"templated-reload-triggers-and-restart-by-as@instance.service"
"templated-reload-triggers-and-restart@instance.service"
"templated-simple-restart-service@instance.service"
"templated-simple-service@instance.service"
]}\n")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
# The same, but in dry mode
out = switch_to_specialisation("${machine}", "restart-and-reload-by-activation-script", action="dry-activate")
assert_lacks(out, "would stop the following units:")
assert_lacks(out, "would NOT stop the following changed units:")
assert_contains(out, "would reload the following units: ${sortedUnits [
"reload-triggers.service"
"simple-reload-service.service"
"templated-reload-triggers@instance.service"
"templated-simple-reload-service@instance.service"
]}\n")
assert_contains(out, "would restart the following units: ${sortedUnits [
"reload-triggers-and-restart-by-as.service"
"reload-triggers-and-restart.service"
"simple-restart-service.service"
"simple-service.service"
"templated-reload-triggers-and-restart-by-as@instance.service"
"templated-reload-triggers-and-restart@instance.service"
"templated-simple-restart-service@instance.service"
"templated-simple-service@instance.service"
]}\n")
assert_lacks(out, "\nwould start the following units:")
with subtest("socket-activated services"):
# Socket-activated services don't get started, just the socket
machine.fail("[ -S /run/test.sock ]")
out = switch_to_specialisation("${machine}", "simple-socket")
# assert_lacks(out, "stopping the following units:") not relevant
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_contains(out, "the following new units were started: socket-activated.socket\n")
machine.succeed("[ -S /run/test.sock ]")
# Changing a non-activated service does nothing
out = switch_to_specialisation("${machine}", "simple-socket-service-modified")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
machine.succeed("[ -S /run/test.sock ]")
# The unit is properly activated when the socket is accessed
if machine.succeed("socat - UNIX-CONNECT:/run/test.sock") != "hello":
raise Exception("Socket was not properly activated") # idk how that would happen tbh
# Changing an activated service with stopIfChanged=false restarts the service
out = switch_to_specialisation("${machine}", "simple-socket")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_contains(out, "\nrestarting the following units: socket-activated.service\n")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
machine.succeed("[ -S /run/test.sock ]")
# Socket-activation of the unit still works
if machine.succeed("socat - UNIX-CONNECT:/run/test.sock") != "hello":
raise Exception("Socket was not properly activated after the service was restarted")
# Changing an activated service with stopIfChanged=true stops the service and
# socket and starts the socket
out = switch_to_specialisation("${machine}", "simple-socket-stop-if-changed")
assert_contains(out, "stopping the following units: socket-activated.service, socket-activated.socket\n")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_contains(out, "\nstarting the following units: socket-activated.socket\n")
assert_lacks(out, "the following new units were started:")
machine.succeed("[ -S /run/test.sock ]")
# Socket-activation of the unit still works
if machine.succeed("socat - UNIX-CONNECT:/run/test.sock") != "hello":
raise Exception("Socket was not properly activated after the service was restarted")
# Changing a reload trigger of a socket-activated unit only reloads it
out = switch_to_specialisation("${machine}", "simple-socket-stop-if-changed-and-reloadtrigger")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_contains(out, "reloading the following units: socket-activated.service\n")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units: socket-activated.socket")
assert_lacks(out, "the following new units were started:")
machine.succeed("[ -S /run/test.sock ]")
# Socket-activation of the unit still works
if machine.succeed("socat - UNIX-CONNECT:/run/test.sock") != "hello":
raise Exception("Socket was not properly activated after the service was restarted")
with subtest("mounts"):
switch_to_specialisation("${machine}", "mount")
out = machine.succeed("mount | grep 'on /testmount'")
assert_contains(out, "size=1024k")
# Changing options reloads the unit
out = switch_to_specialisation("${machine}", "mountOptionsModified")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_contains(out, "reloading the following units: testmount.mount\n")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
# It changed
out = machine.succeed("mount | grep 'on /testmount'")
assert_contains(out, "size=10240k")
# Changing anything but `Options=` restarts the unit
out = switch_to_specialisation("${machine}", "mountModified")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_contains(out, "\nrestarting the following units: testmount.mount\n")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
# It changed
out = machine.succeed("mount | grep 'on /testmount'")
assert_contains(out, "ramfs")
with subtest("timers"):
switch_to_specialisation("${machine}", "timer")
out = machine.succeed("systemctl show test-timer.timer")
assert_contains(out, "OnCalendar=2014-03-25 02:59:56 UTC")
out = switch_to_specialisation("${machine}", "timerModified")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following units:")
assert_lacks(out, "reloading the following units:")
assert_contains(out, "\nrestarting the following units: test-timer.timer\n")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
# It changed
out = machine.succeed("systemctl show test-timer.timer")
assert_contains(out, "OnCalendar=Fri 2012-11-23 16:00:00")
2022-03-06 13:52:54 +00:00
with subtest("targets"):
# Modifying some special targets like hybrid-sleep.target does nothing
out = switch_to_specialisation("${machine}", "hybridSleepModified")
assert_contains(out, "stopping the following units: test-timer.timer\n")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
# Adding a new target starts it
out = switch_to_specialisation("${machine}", "target")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_contains(out, "the following new units were started: test-target.target\n")
# Changing a target doesn't print anything because the unit is filtered
machine.systemctl("start test-service.service")
out = switch_to_specialisation("${machine}", "targetModified")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
machine.succeed("systemctl is-active test-service.service") # target was not restarted
# With X-StopOnReconfiguration, the target gets stopped and started
out = switch_to_specialisation("${machine}", "targetModifiedStopOnReconfig")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
machine.fail("systemctl is-active test-service.servce") # target was restarted
# Remove the target by switching to the old specialisation
out = switch_to_specialisation("${machine}", "timerModified")
assert_contains(out, "stopping the following units: test-target.target\n")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_contains(out, "the following new units were started: test-timer.timer\n")
with subtest("paths"):
out = switch_to_specialisation("${machine}", "path")
assert_contains(out, "stopping the following units: test-timer.timer\n")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_contains(out, "the following new units were started: test-watch.path\n")
machine.fail("test -f /testpath-modified")
# touch the file, unit should be triggered
machine.succeed("touch /testpath")
machine.wait_until_succeeds("test -f /testpath-modified")
machine.succeed("rm /testpath /testpath-modified")
machine.systemctl("stop test-watch.service")
switch_to_specialisation("${machine}", "pathModified")
machine.succeed("touch /testpath")
machine.fail("test -f /testpath-modified")
machine.succeed("touch /testpath2")
machine.wait_until_succeeds("test -f /testpath-modified")
# This test ensures that changes to slice configuration get applied.
# We test this by having a slice that allows no memory allocation at
# all and starting a service within it. If the service crashes, the slice
# is applied and if we modify the slice to allow memory allocation, the
# service should successfully start.
with subtest("slices"):
machine.succeed("echo 0 > /proc/sys/vm/panic_on_oom") # allow OOMing
out = switch_to_specialisation("${machine}", "slice")
# assert_lacks(out, "stopping the following units:") not relevant
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
machine.fail("systemctl start testservice.service")
out = switch_to_specialisation("${machine}", "sliceModified")
assert_lacks(out, "stopping the following units:")
assert_lacks(out, "NOT restarting the following changed units:")
assert_lacks(out, "reloading the following units:")
assert_lacks(out, "\nrestarting the following units:")
assert_lacks(out, "\nstarting the following units:")
assert_lacks(out, "the following new units were started:")
machine.succeed("systemctl start testservice.service")
machine.succeed("echo 1 > /proc/sys/vm/panic_on_oom") # disallow OOMing
'';
})