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Merge pull request #141192 from helsinki-systems/feat/improved-socket-handling2
nixos/switch-to-configuration: Improve socket and timer handling, clean up, minor fixes, add test
This commit is contained in:
Jörg Thalheim
GitHub
commit
57961d2b83
@ -1554,6 +1554,15 @@ Superuser created successfully.
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encapsulation.
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</para>
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</listitem>
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<listitem>
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<para>
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Changing systemd <literal>.socket</literal> units now restarts
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them and stops the service that is activated by them.
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Additionally, services with
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<literal>stopOnChange = false</literal> don’t break anymore
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when they are socket-activated.
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</para>
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</listitem>
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</itemizedlist>
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</section>
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</section>
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@ -449,3 +449,5 @@ In addition to numerous new and upgraded packages, this release has the followin
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- The `networking` module has a new `networking.fooOverUDP` option to configure Foo-over-UDP encapsulations.
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- `networking.sits` now supports Foo-over-UDP encapsulation.
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- Changing systemd `.socket` units now restarts them and stops the service that is activated by them. Additionally, services with `stopOnChange = false` don't break anymore when they are socket-activated.
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@ -11,7 +11,6 @@ use Cwd 'abs_path';
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my $out = "@out@";
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# FIXME: maybe we should use /proc/1/exe to get the current systemd.
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my $curSystemd = abs_path("/run/current-system/sw/bin");
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# To be robust against interruption, record what units need to be started etc.
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@ -19,13 +18,16 @@ my $startListFile = "/run/nixos/start-list";
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my $restartListFile = "/run/nixos/restart-list";
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my $reloadListFile = "/run/nixos/reload-list";
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# Parse restart/reload requests by the activation script
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# Parse restart/reload requests by the activation script.
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# Activation scripts may write newline-separated units to this
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# file and switch-to-configuration will handle them. While
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# `stopIfChanged = true` is ignored, switch-to-configuration will
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# handle `restartIfChanged = false` and `reloadIfChanged = true`.
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# This also works for socket-activated units.
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my $restartByActivationFile = "/run/nixos/activation-restart-list";
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my $reloadByActivationFile = "/run/nixos/activation-reload-list";
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my $dryRestartByActivationFile = "/run/nixos/dry-activation-restart-list";
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my $dryReloadByActivationFile = "/run/nixos/dry-activation-reload-list";
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make_path("/run/nixos", { mode => 0755 });
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make_path("/run/nixos", { mode => oct(755) });
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my $action = shift @ARGV;
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@ -147,6 +149,92 @@ sub fingerprintUnit {
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return abs_path($s) . (-f "${s}.d/overrides.conf" ? " " . abs_path "${s}.d/overrides.conf" : "");
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}
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sub handleModifiedUnit {
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my ($unit, $baseName, $newUnitFile, $activePrev, $unitsToStop, $unitsToStart, $unitsToReload, $unitsToRestart, $unitsToSkip) = @_;
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if ($unit eq "sysinit.target" || $unit eq "basic.target" || $unit eq "multi-user.target" || $unit eq "graphical.target" || $unit =~ /\.slice$/ || $unit =~ /\.path$/) {
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# Do nothing. These cannot be restarted directly.
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# Slices and Paths don't have to be restarted since
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# properties (resource limits and inotify watches)
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# seem to get applied on daemon-reload.
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} elsif ($unit =~ /\.mount$/) {
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# Reload the changed mount unit to force a remount.
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$unitsToReload->{$unit} = 1;
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recordUnit($reloadListFile, $unit);
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} else {
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my $unitInfo = parseUnit($newUnitFile);
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if (boolIsTrue($unitInfo->{'X-ReloadIfChanged'} // "no")) {
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$unitsToReload->{$unit} = 1;
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recordUnit($reloadListFile, $unit);
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}
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elsif (!boolIsTrue($unitInfo->{'X-RestartIfChanged'} // "yes") || boolIsTrue($unitInfo->{'RefuseManualStop'} // "no") || boolIsTrue($unitInfo->{'X-OnlyManualStart'} // "no")) {
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$unitsToSkip->{$unit} = 1;
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} else {
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# If this unit is socket-activated, then stop it instead
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# of restarting it to make sure the new version of it is
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# socket-activated.
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my $socketActivated = 0;
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if ($unit =~ /\.service$/) {
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my @sockets = split / /, ($unitInfo->{Sockets} // "");
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if (scalar @sockets == 0) {
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@sockets = ("$baseName.socket");
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}
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foreach my $socket (@sockets) {
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if (-e "$out/etc/systemd/system/$socket") {
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$socketActivated = 1;
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$unitsToStop->{$unit} = 1;
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# If the socket was not running previously,
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# start it now.
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if (not defined $activePrev->{$socket}) {
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$unitsToStart->{$socket} = 1;
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}
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}
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}
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}
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# Don't do the rest of this for socket-activated units
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# because we handled these above where we stop the unit.
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# Since only services can be socket-activated, the
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# following condition always evaluates to `true` for
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# non-service units.
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if ($socketActivated) {
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return;
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}
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# If we are restarting a socket, also stop the corresponding
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# service. This is required because restarting a socket
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# when the service is already activated fails.
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if ($unit =~ /\.socket$/) {
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my $service = $unitInfo->{Service} // "";
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if ($service eq "") {
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$service = "$baseName.service";
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}
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if (defined $activePrev->{$service}) {
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$unitsToStop->{$service} = 1;
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}
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$unitsToRestart->{$unit} = 1;
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recordUnit($restartListFile, $unit);
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} else {
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# Always restart non-services instead of stopping and starting them
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# because it doesn't make sense to stop them with a config from
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# the old evaluation.
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if (!boolIsTrue($unitInfo->{'X-StopIfChanged'} // "yes") || $unit !~ /\.service$/) {
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# This unit should be restarted instead of
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# stopped and started.
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$unitsToRestart->{$unit} = 1;
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recordUnit($restartListFile, $unit);
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} else {
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# We write to a file to ensure that the
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# service gets restarted if we're interrupted.
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$unitsToStart->{$unit} = 1;
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recordUnit($startListFile, $unit);
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$unitsToStop->{$unit} = 1;
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}
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}
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}
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}
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}
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# Figure out what units need to be stopped, started, restarted or reloaded.
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my (%unitsToStop, %unitsToSkip, %unitsToStart, %unitsToRestart, %unitsToReload);
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@ -219,65 +307,7 @@ while (my ($unit, $state) = each %{$activePrev}) {
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}
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elsif (fingerprintUnit($prevUnitFile) ne fingerprintUnit($newUnitFile)) {
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if ($unit eq "sysinit.target" || $unit eq "basic.target" || $unit eq "multi-user.target" || $unit eq "graphical.target") {
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# Do nothing. These cannot be restarted directly.
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} elsif ($unit =~ /\.mount$/) {
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# Reload the changed mount unit to force a remount.
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$unitsToReload{$unit} = 1;
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recordUnit($reloadListFile, $unit);
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} elsif ($unit =~ /\.socket$/ || $unit =~ /\.path$/ || $unit =~ /\.slice$/) {
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# FIXME: do something?
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} else {
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my $unitInfo = parseUnit($newUnitFile);
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if (boolIsTrue($unitInfo->{'X-ReloadIfChanged'} // "no")) {
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$unitsToReload{$unit} = 1;
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recordUnit($reloadListFile, $unit);
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}
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elsif (!boolIsTrue($unitInfo->{'X-RestartIfChanged'} // "yes") || boolIsTrue($unitInfo->{'RefuseManualStop'} // "no") || boolIsTrue($unitInfo->{'X-OnlyManualStart'} // "no")) {
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$unitsToSkip{$unit} = 1;
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} else {
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if (!boolIsTrue($unitInfo->{'X-StopIfChanged'} // "yes")) {
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# This unit should be restarted instead of
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# stopped and started.
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$unitsToRestart{$unit} = 1;
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recordUnit($restartListFile, $unit);
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} else {
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# If this unit is socket-activated, then stop the
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# socket unit(s) as well, and restart the
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# socket(s) instead of the service.
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my $socketActivated = 0;
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if ($unit =~ /\.service$/) {
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my @sockets = split / /, ($unitInfo->{Sockets} // "");
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if (scalar @sockets == 0) {
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@sockets = ("$baseName.socket");
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}
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foreach my $socket (@sockets) {
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if (defined $activePrev->{$socket}) {
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$unitsToStop{$socket} = 1;
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# Only restart sockets that actually
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# exist in new configuration:
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if (-e "$out/etc/systemd/system/$socket") {
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$unitsToStart{$socket} = 1;
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recordUnit($startListFile, $socket);
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$socketActivated = 1;
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}
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}
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}
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}
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# If the unit is not socket-activated, record
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# that this unit needs to be started below.
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# We write this to a file to ensure that the
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# service gets restarted if we're interrupted.
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if (!$socketActivated) {
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$unitsToStart{$unit} = 1;
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recordUnit($startListFile, $unit);
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}
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$unitsToStop{$unit} = 1;
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}
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}
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}
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handleModifiedUnit($unit, $baseName, $newUnitFile, $activePrev, \%unitsToStop, \%unitsToStart, \%unitsToReload, \%unitsToRestart, %unitsToSkip);
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}
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}
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}
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@ -362,8 +392,6 @@ sub filterUnits {
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}
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my @unitsToStopFiltered = filterUnits(\%unitsToStop);
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my @unitsToStartFiltered = filterUnits(\%unitsToStart);
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# Show dry-run actions.
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if ($action eq "dry-activate") {
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@ -375,21 +403,44 @@ if ($action eq "dry-activate") {
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print STDERR "would activate the configuration...\n";
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system("$out/dry-activate", "$out");
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$unitsToRestart{$_} = 1 foreach
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split('\n', read_file($dryRestartByActivationFile, err_mode => 'quiet') // "");
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# Handle the activation script requesting the restart or reload of a unit.
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my %unitsToAlsoStop;
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my %unitsToAlsoSkip;
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foreach (split('\n', read_file($dryRestartByActivationFile, err_mode => 'quiet') // "")) {
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my $unit = $_;
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my $baseUnit = $unit;
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my $newUnitFile = "$out/etc/systemd/system/$baseUnit";
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$unitsToReload{$_} = 1 foreach
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split('\n', read_file($dryReloadByActivationFile, err_mode => 'quiet') // "");
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# Detect template instances.
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if (!-e $newUnitFile && $unit =~ /^(.*)@[^\.]*\.(.*)$/) {
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$baseUnit = "$1\@.$2";
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$newUnitFile = "$out/etc/systemd/system/$baseUnit";
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}
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my $baseName = $baseUnit;
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$baseName =~ s/\.[a-z]*$//;
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handleModifiedUnit($unit, $baseName, $newUnitFile, $activePrev, \%unitsToAlsoStop, \%unitsToStart, \%unitsToReload, \%unitsToRestart, %unitsToAlsoSkip);
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}
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unlink($dryRestartByActivationFile);
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my @unitsToAlsoStopFiltered = filterUnits(\%unitsToAlsoStop);
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if (scalar(keys %unitsToAlsoStop) > 0) {
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print STDERR "would stop the following units as well: ", join(", ", @unitsToAlsoStopFiltered), "\n"
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if scalar @unitsToAlsoStopFiltered;
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}
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print STDERR "would NOT restart the following changed units as well: ", join(", ", sort(keys %unitsToAlsoSkip)), "\n"
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if scalar(keys %unitsToAlsoSkip) > 0;
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print STDERR "would restart systemd\n" if $restartSystemd;
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print STDERR "would restart the following units: ", join(", ", sort(keys %unitsToRestart)), "\n"
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if scalar(keys %unitsToRestart) > 0;
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print STDERR "would start the following units: ", join(", ", @unitsToStartFiltered), "\n"
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if scalar @unitsToStartFiltered;
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print STDERR "would reload the following units: ", join(", ", sort(keys %unitsToReload)), "\n"
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if scalar(keys %unitsToReload) > 0;
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unlink($dryRestartByActivationFile);
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unlink($dryReloadByActivationFile);
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print STDERR "would restart the following units: ", join(", ", sort(keys %unitsToRestart)), "\n"
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if scalar(keys %unitsToRestart) > 0;
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my @unitsToStartFiltered = filterUnits(\%unitsToStart);
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print STDERR "would start the following units: ", join(", ", @unitsToStartFiltered), "\n"
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if scalar @unitsToStartFiltered;
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exit 0;
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}
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@ -400,7 +451,7 @@ if (scalar (keys %unitsToStop) > 0) {
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print STDERR "stopping the following units: ", join(", ", @unitsToStopFiltered), "\n"
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if scalar @unitsToStopFiltered;
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# Use current version of systemctl binary before daemon is reexeced.
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system("$curSystemd/systemctl", "stop", "--", sort(keys %unitsToStop)); # FIXME: ignore errors?
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system("$curSystemd/systemctl", "stop", "--", sort(keys %unitsToStop));
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}
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print STDERR "NOT restarting the following changed units: ", join(", ", sort(keys %unitsToSkip)), "\n"
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@ -414,12 +465,38 @@ system("$out/activate", "$out") == 0 or $res = 2;
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# Handle the activation script requesting the restart or reload of a unit.
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# We can only restart and reload (not stop/start) because the units to be
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# stopped are already stopped before the activation script is run.
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$unitsToRestart{$_} = 1 foreach
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split('\n', read_file($restartByActivationFile, err_mode => 'quiet') // "");
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# stopped are already stopped before the activation script is run. We do however
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# make an exception for services that are socket-activated and that have to be stopped
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# instead of being restarted.
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my %unitsToAlsoStop;
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my %unitsToAlsoSkip;
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foreach (split('\n', read_file($restartByActivationFile, err_mode => 'quiet') // "")) {
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my $unit = $_;
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my $baseUnit = $unit;
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my $newUnitFile = "$out/etc/systemd/system/$baseUnit";
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$unitsToReload{$_} = 1 foreach
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split('\n', read_file($reloadByActivationFile, err_mode => 'quiet') // "");
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# Detect template instances.
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if (!-e $newUnitFile && $unit =~ /^(.*)@[^\.]*\.(.*)$/) {
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$baseUnit = "$1\@.$2";
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$newUnitFile = "$out/etc/systemd/system/$baseUnit";
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}
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my $baseName = $baseUnit;
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$baseName =~ s/\.[a-z]*$//;
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handleModifiedUnit($unit, $baseName, $newUnitFile, $activePrev, \%unitsToAlsoStop, \%unitsToStart, \%unitsToReload, \%unitsToRestart, %unitsToAlsoSkip);
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}
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unlink($restartByActivationFile);
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my @unitsToAlsoStopFiltered = filterUnits(\%unitsToAlsoStop);
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if (scalar(keys %unitsToAlsoStop) > 0) {
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print STDERR "stopping the following units as well: ", join(", ", @unitsToAlsoStopFiltered), "\n"
|
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if scalar @unitsToAlsoStopFiltered;
|
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system("$curSystemd/systemctl", "stop", "--", sort(keys %unitsToAlsoStop));
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}
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print STDERR "NOT restarting the following changed units as well: ", join(", ", sort(keys %unitsToAlsoSkip)), "\n"
|
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if scalar(keys %unitsToAlsoSkip) > 0;
|
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|
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# Restart systemd if necessary. Note that this is done using the
|
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# current version of systemd, just in case the new one has trouble
|
||||
@ -460,14 +537,40 @@ if (scalar(keys %unitsToReload) > 0) {
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print STDERR "reloading the following units: ", join(", ", sort(keys %unitsToReload)), "\n";
|
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system("@systemd@/bin/systemctl", "reload", "--", sort(keys %unitsToReload)) == 0 or $res = 4;
|
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unlink($reloadListFile);
|
||||
unlink($reloadByActivationFile);
|
||||
}
|
||||
|
||||
# Restart changed services (those that have to be restarted rather
|
||||
# than stopped and started).
|
||||
if (scalar(keys %unitsToRestart) > 0) {
|
||||
print STDERR "restarting the following units: ", join(", ", sort(keys %unitsToRestart)), "\n";
|
||||
system("@systemd@/bin/systemctl", "restart", "--", sort(keys %unitsToRestart)) == 0 or $res = 4;
|
||||
|
||||
# We split the units to be restarted into sockets and non-sockets.
|
||||
# This is because restarting sockets may fail which is not bad by
|
||||
# itself but which will prevent changes on the sockets. We usually
|
||||
# restart the socket and stop the service before that. Restarting
|
||||
# the socket will fail however when the service was re-activated
|
||||
# in the meantime. There is no proper way to prevent that from happening.
|
||||
my @unitsWithErrorHandling = grep { $_ !~ /\.socket$/ } sort(keys %unitsToRestart);
|
||||
my @unitsWithoutErrorHandling = grep { $_ =~ /\.socket$/ } sort(keys %unitsToRestart);
|
||||
|
||||
if (scalar(@unitsWithErrorHandling) > 0) {
|
||||
system("@systemd@/bin/systemctl", "restart", "--", @unitsWithErrorHandling) == 0 or $res = 4;
|
||||
}
|
||||
if (scalar(@unitsWithoutErrorHandling) > 0) {
|
||||
# Don't print warnings from systemctl
|
||||
no warnings 'once';
|
||||
open(OLDERR, ">&", \*STDERR);
|
||||
close(STDERR);
|
||||
|
||||
my $ret = system("@systemd@/bin/systemctl", "restart", "--", @unitsWithoutErrorHandling);
|
||||
|
||||
# Print stderr again
|
||||
open(STDERR, ">&OLDERR");
|
||||
|
||||
if ($ret ne 0) {
|
||||
print STDERR "warning: some sockets failed to restart. Please check your journal (journalctl -eb) and act accordingly.\n";
|
||||
}
|
||||
}
|
||||
unlink($restartListFile);
|
||||
unlink($restartByActivationFile);
|
||||
}
|
||||
@ -478,6 +581,7 @@ if (scalar(keys %unitsToRestart) > 0) {
|
||||
# that are symlinks to other units. We shouldn't start both at the
|
||||
# same time because we'll get a "Failed to add path to set" error from
|
||||
# systemd.
|
||||
my @unitsToStartFiltered = filterUnits(\%unitsToStart);
|
||||
print STDERR "starting the following units: ", join(", ", @unitsToStartFiltered), "\n"
|
||||
if scalar @unitsToStartFiltered;
|
||||
system("@systemd@/bin/systemctl", "start", "--", sort(keys %unitsToStart)) == 0 or $res = 4;
|
||||
@ -485,7 +589,7 @@ unlink($startListFile);
|
||||
|
||||
|
||||
# Print failed and new units.
|
||||
my (@failed, @new, @restarting);
|
||||
my (@failed, @new);
|
||||
my $activeNew = getActiveUnits;
|
||||
while (my ($unit, $state) = each %{$activeNew}) {
|
||||
if ($state->{state} eq "failed") {
|
||||
@ -501,7 +605,9 @@ while (my ($unit, $state) = each %{$activeNew}) {
|
||||
push @failed, $unit;
|
||||
}
|
||||
}
|
||||
elsif ($state->{state} ne "failed" && !defined $activePrev->{$unit}) {
|
||||
# Ignore scopes since they are not managed by this script but rather
|
||||
# created and managed by third-party services via the systemd dbus API.
|
||||
elsif ($state->{state} ne "failed" && !defined $activePrev->{$unit} && $unit !~ /\.scope$/) {
|
||||
push @new, $unit;
|
||||
}
|
||||
}
|
||||
|
||||
@ -84,6 +84,13 @@ let
|
||||
export localeArchive="${config.i18n.glibcLocales}/lib/locale/locale-archive"
|
||||
substituteAll ${./switch-to-configuration.pl} $out/bin/switch-to-configuration
|
||||
chmod +x $out/bin/switch-to-configuration
|
||||
${optionalString (pkgs.stdenv.hostPlatform == pkgs.stdenv.buildPlatform) ''
|
||||
if ! output=$($perl/bin/perl -c $out/bin/switch-to-configuration 2>&1); then
|
||||
echo "switch-to-configuration syntax is not valid:"
|
||||
echo "$output"
|
||||
exit 1
|
||||
fi
|
||||
''}
|
||||
|
||||
echo -n "${toString config.system.extraDependencies}" > $out/extra-dependencies
|
||||
|
||||
|
||||
@ -7,15 +7,224 @@ import ./make-test-python.nix ({ pkgs, ...} : {
|
||||
};
|
||||
|
||||
nodes = {
|
||||
machine = { ... }: {
|
||||
machine = { config, pkgs, lib, ... }: {
|
||||
environment.systemPackages = [ pkgs.socat ]; # for the socket activation stuff
|
||||
users.mutableUsers = false;
|
||||
|
||||
specialisation = {
|
||||
# A system with a simple socket-activated unit
|
||||
simple-socket.configuration = {
|
||||
systemd.services.socket-activated.serviceConfig = {
|
||||
ExecStart = pkgs.writeScript "socket-test.py" /* python */ ''
|
||||
#!${pkgs.python3}/bin/python3
|
||||
|
||||
from socketserver import TCPServer, StreamRequestHandler
|
||||
import socket
|
||||
|
||||
class Handler(StreamRequestHandler):
|
||||
def handle(self):
|
||||
self.wfile.write("hello".encode("utf-8"))
|
||||
|
||||
class Server(TCPServer):
|
||||
def __init__(self, server_address, handler_cls):
|
||||
# Invoke base but omit bind/listen steps (performed by systemd activation!)
|
||||
TCPServer.__init__(
|
||||
self, server_address, handler_cls, bind_and_activate=False)
|
||||
# Override socket
|
||||
self.socket = socket.fromfd(3, self.address_family, self.socket_type)
|
||||
|
||||
if __name__ == "__main__":
|
||||
server = Server(("localhost", 1234), Handler)
|
||||
server.serve_forever()
|
||||
'';
|
||||
};
|
||||
systemd.sockets.socket-activated = {
|
||||
wantedBy = [ "sockets.target" ];
|
||||
listenStreams = [ "/run/test.sock" ];
|
||||
socketConfig.SocketMode = lib.mkDefault "0777";
|
||||
};
|
||||
};
|
||||
|
||||
# The same system but the socket is modified
|
||||
modified-socket.configuration = {
|
||||
imports = [ config.specialisation.simple-socket.configuration ];
|
||||
systemd.sockets.socket-activated.socketConfig.SocketMode = "0666";
|
||||
};
|
||||
|
||||
# The same system but the service is modified
|
||||
modified-service.configuration = {
|
||||
imports = [ config.specialisation.simple-socket.configuration ];
|
||||
systemd.services.socket-activated.serviceConfig.X-Test = "test";
|
||||
};
|
||||
|
||||
# The same system but both service and socket are modified
|
||||
modified-service-and-socket.configuration = {
|
||||
imports = [ config.specialisation.simple-socket.configuration ];
|
||||
systemd.services.socket-activated.serviceConfig.X-Test = "some_value";
|
||||
systemd.sockets.socket-activated.socketConfig.SocketMode = "0444";
|
||||
};
|
||||
|
||||
# A system with a socket-activated service and some simple services
|
||||
service-and-socket.configuration = {
|
||||
imports = [ config.specialisation.simple-socket.configuration ];
|
||||
systemd.services.simple-service = {
|
||||
wantedBy = [ "multi-user.target" ];
|
||||
serviceConfig = {
|
||||
Type = "oneshot";
|
||||
RemainAfterExit = true;
|
||||
ExecStart = "${pkgs.coreutils}/bin/true";
|
||||
};
|
||||
};
|
||||
|
||||
systemd.services.simple-restart-service = {
|
||||
stopIfChanged = false;
|
||||
wantedBy = [ "multi-user.target" ];
|
||||
serviceConfig = {
|
||||
Type = "oneshot";
|
||||
RemainAfterExit = true;
|
||||
ExecStart = "${pkgs.coreutils}/bin/true";
|
||||
};
|
||||
};
|
||||
|
||||
systemd.services.simple-reload-service = {
|
||||
reloadIfChanged = true;
|
||||
wantedBy = [ "multi-user.target" ];
|
||||
serviceConfig = {
|
||||
Type = "oneshot";
|
||||
RemainAfterExit = true;
|
||||
ExecStart = "${pkgs.coreutils}/bin/true";
|
||||
ExecReload = "${pkgs.coreutils}/bin/true";
|
||||
};
|
||||
};
|
||||
|
||||
systemd.services.no-restart-service = {
|
||||
restartIfChanged = false;
|
||||
wantedBy = [ "multi-user.target" ];
|
||||
serviceConfig = {
|
||||
Type = "oneshot";
|
||||
RemainAfterExit = true;
|
||||
ExecStart = "${pkgs.coreutils}/bin/true";
|
||||
};
|
||||
};
|
||||
};
|
||||
|
||||
# The same system but with an activation script that restarts all services
|
||||
restart-and-reload-by-activation-script.configuration = {
|
||||
imports = [ config.specialisation.service-and-socket.configuration ];
|
||||
system.activationScripts.restart-and-reload-test = {
|
||||
supportsDryActivation = true;
|
||||
deps = [];
|
||||
text = ''
|
||||
if [ "$NIXOS_ACTION" = dry-activate ]; then
|
||||
f=/run/nixos/dry-activation-restart-list
|
||||
else
|
||||
f=/run/nixos/activation-restart-list
|
||||
fi
|
||||
cat <<EOF >> "$f"
|
||||
simple-service.service
|
||||
simple-restart-service.service
|
||||
simple-reload-service.service
|
||||
no-restart-service.service
|
||||
socket-activated.service
|
||||
EOF
|
||||
'';
|
||||
};
|
||||
};
|
||||
|
||||
# A system with a timer
|
||||
with-timer.configuration = {
|
||||
systemd.timers.test-timer = {
|
||||
wantedBy = [ "timers.target" ];
|
||||
timerConfig.OnCalendar = "@1395716396"; # chosen by fair dice roll
|
||||
};
|
||||
systemd.services.test-timer = {
|
||||
serviceConfig = {
|
||||
Type = "oneshot";
|
||||
ExecStart = "${pkgs.coreutils}/bin/true";
|
||||
};
|
||||
};
|
||||
};
|
||||
|
||||
# The same system but with another time
|
||||
with-timer-modified.configuration = {
|
||||
imports = [ config.specialisation.with-timer.configuration ];
|
||||
systemd.timers.test-timer.timerConfig.OnCalendar = lib.mkForce "Fri 2012-11-23 16:00:00";
|
||||
};
|
||||
|
||||
# A system with a systemd mount
|
||||
with-mount.configuration = {
|
||||
systemd.mounts = [
|
||||
{
|
||||
description = "Testmount";
|
||||
what = "tmpfs";
|
||||
type = "tmpfs";
|
||||
where = "/testmount";
|
||||
options = "size=1M";
|
||||
wantedBy = [ "local-fs.target" ];
|
||||
}
|
||||
];
|
||||
};
|
||||
|
||||
# The same system but with another time
|
||||
with-mount-modified.configuration = {
|
||||
systemd.mounts = [
|
||||
{
|
||||
description = "Testmount";
|
||||
what = "tmpfs";
|
||||
type = "tmpfs";
|
||||
where = "/testmount";
|
||||
options = "size=10M";
|
||||
wantedBy = [ "local-fs.target" ];
|
||||
}
|
||||
];
|
||||
};
|
||||
|
||||
# A system with a path unit
|
||||
with-path.configuration = {
|
||||
systemd.paths.test-watch = {
|
||||
wantedBy = [ "paths.target" ];
|
||||
pathConfig.PathExists = "/testpath";
|
||||
};
|
||||
systemd.services.test-watch = {
|
||||
serviceConfig = {
|
||||
Type = "oneshot";
|
||||
ExecStart = "${pkgs.coreutils}/bin/touch /testpath-modified";
|
||||
};
|
||||
};
|
||||
};
|
||||
|
||||
# The same system but watching another file
|
||||
with-path-modified.configuration = {
|
||||
imports = [ config.specialisation.with-path.configuration ];
|
||||
systemd.paths.test-watch.pathConfig.PathExists = lib.mkForce "/testpath2";
|
||||
};
|
||||
|
||||
# A system with a slice
|
||||
with-slice.configuration = {
|
||||
systemd.slices.testslice.sliceConfig.MemoryMax = "1"; # don't allow memory allocation
|
||||
systemd.services.testservice = {
|
||||
serviceConfig = {
|
||||
Type = "oneshot";
|
||||
RemainAfterExit = true;
|
||||
ExecStart = "${pkgs.coreutils}/bin/true";
|
||||
Slice = "testslice.slice";
|
||||
};
|
||||
};
|
||||
};
|
||||
|
||||
# The same system but the slice allows to allocate memory
|
||||
with-slice-non-crashing.configuration = {
|
||||
imports = [ config.specialisation.with-slice.configuration ];
|
||||
systemd.slices.testslice.sliceConfig.MemoryMax = lib.mkForce null;
|
||||
};
|
||||
};
|
||||
};
|
||||
other = { ... }: {
|
||||
users.mutableUsers = true;
|
||||
};
|
||||
};
|
||||
|
||||
testScript = {nodes, ...}: let
|
||||
testScript = { nodes, ... }: let
|
||||
originalSystem = nodes.machine.config.system.build.toplevel;
|
||||
otherSystem = nodes.other.config.system.build.toplevel;
|
||||
|
||||
@ -27,12 +236,182 @@ import ./make-test-python.nix ({ pkgs, ...} : {
|
||||
set -o pipefail
|
||||
exec env -i "$@" | tee /dev/stderr
|
||||
'';
|
||||
in ''
|
||||
in /* python */ ''
|
||||
def switch_to_specialisation(name, action="test"):
|
||||
out = machine.succeed(f"${originalSystem}/specialisation/{name}/bin/switch-to-configuration {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.succeed(
|
||||
"${stderrRunner} ${originalSystem}/bin/switch-to-configuration test"
|
||||
)
|
||||
machine.succeed(
|
||||
"${stderrRunner} ${otherSystem}/bin/switch-to-configuration test"
|
||||
)
|
||||
|
||||
with subtest("systemd sockets"):
|
||||
machine.succeed("${originalSystem}/bin/switch-to-configuration test")
|
||||
|
||||
# Simple socket is created
|
||||
out = switch_to_specialisation("simple-socket")
|
||||
assert_lacks(out, "stopping the following units:")
|
||||
# not checking for reload because dbus gets reloaded
|
||||
assert_lacks(out, "restarting the following units:")
|
||||
assert_lacks(out, "\nstarting the following units:")
|
||||
assert_contains(out, "the following new units were started: socket-activated.socket\n")
|
||||
assert_lacks(out, "as well:")
|
||||
machine.succeed("[ $(stat -c%a /run/test.sock) = 777 ]")
|
||||
|
||||
# Changing the socket restarts it
|
||||
out = switch_to_specialisation("modified-socket")
|
||||
assert_lacks(out, "stopping the following units:")
|
||||
#assert_lacks(out, "reloading the following units:")
|
||||
assert_contains(out, "restarting the following units: socket-activated.socket\n")
|
||||
assert_lacks(out, "\nstarting the following units:")
|
||||
assert_lacks(out, "the following new units were started:")
|
||||
assert_lacks(out, "as well:")
|
||||
machine.succeed("[ $(stat -c%a /run/test.sock) = 666 ]") # change was applied
|
||||
|
||||
# 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")
|
||||
|
||||
# Changing the socket restarts it and ignores the active service
|
||||
out = switch_to_specialisation("simple-socket")
|
||||
assert_contains(out, "stopping the following units: socket-activated.service\n")
|
||||
assert_lacks(out, "reloading the following units:")
|
||||
assert_contains(out, "restarting the following units: socket-activated.socket\n")
|
||||
assert_lacks(out, "\nstarting the following units:")
|
||||
assert_lacks(out, "the following new units were started:")
|
||||
assert_lacks(out, "as well:")
|
||||
machine.succeed("[ $(stat -c%a /run/test.sock) = 777 ]") # change was applied
|
||||
|
||||
# Changing the service does nothing when the service is not active
|
||||
out = switch_to_specialisation("modified-service")
|
||||
assert_lacks(out, "stopping the following units:")
|
||||
assert_lacks(out, "reloading the following units:")
|
||||
assert_lacks(out, "restarting the following units:")
|
||||
assert_lacks(out, "\nstarting the following units:")
|
||||
assert_lacks(out, "the following new units were started:")
|
||||
assert_lacks(out, "as well:")
|
||||
|
||||
# Activating the service and modifying it stops it but leaves the socket untouched
|
||||
machine.succeed("socat - UNIX-CONNECT:/run/test.sock")
|
||||
out = switch_to_specialisation("simple-socket")
|
||||
assert_contains(out, "stopping the following units: socket-activated.service\n")
|
||||
assert_lacks(out, "reloading the following units:")
|
||||
assert_lacks(out, "restarting the following units:")
|
||||
assert_lacks(out, "\nstarting the following units:")
|
||||
assert_lacks(out, "the following new units were started:")
|
||||
assert_lacks(out, "as well:")
|
||||
|
||||
# Activating the service and both the service and the socket stops the service and restarts the socket
|
||||
machine.succeed("socat - UNIX-CONNECT:/run/test.sock")
|
||||
out = switch_to_specialisation("modified-service-and-socket")
|
||||
assert_contains(out, "stopping the following units: socket-activated.service\n")
|
||||
assert_lacks(out, "reloading the following units:")
|
||||
assert_contains(out, "restarting the following units: socket-activated.socket\n")
|
||||
assert_lacks(out, "\nstarting the following units:")
|
||||
assert_lacks(out, "the following new units were started:")
|
||||
assert_lacks(out, "as well:")
|
||||
|
||||
with subtest("restart and reload by activation file"):
|
||||
out = switch_to_specialisation("service-and-socket")
|
||||
# Switch to a system where the example services get restarted
|
||||
# by the activation script
|
||||
out = switch_to_specialisation("restart-and-reload-by-activation-script")
|
||||
assert_lacks(out, "stopping the following units:")
|
||||
assert_contains(out, "stopping the following units as well: simple-service.service, socket-activated.service\n")
|
||||
assert_contains(out, "reloading the following units: simple-reload-service.service\n")
|
||||
assert_contains(out, "restarting the following units: simple-restart-service.service\n")
|
||||
assert_contains(out, "\nstarting the following units: simple-service.service")
|
||||
|
||||
# The same, but in dry mode
|
||||
switch_to_specialisation("service-and-socket")
|
||||
out = switch_to_specialisation("restart-and-reload-by-activation-script", action="dry-activate")
|
||||
assert_lacks(out, "would stop the following units:")
|
||||
assert_contains(out, "would stop the following units as well: simple-service.service, socket-activated.service\n")
|
||||
assert_contains(out, "would reload the following units: simple-reload-service.service\n")
|
||||
assert_contains(out, "would restart the following units: simple-restart-service.service\n")
|
||||
assert_contains(out, "\nwould start the following units: simple-service.service")
|
||||
|
||||
with subtest("mounts"):
|
||||
switch_to_specialisation("with-mount")
|
||||
out = machine.succeed("mount | grep 'on /testmount'")
|
||||
assert_contains(out, "size=1024k")
|
||||
|
||||
out = switch_to_specialisation("with-mount-modified")
|
||||
assert_lacks(out, "stopping the following units:")
|
||||
assert_contains(out, "reloading the following units: testmount.mount\n")
|
||||
assert_lacks(out, "restarting the following units:")
|
||||
assert_lacks(out, "\nstarting the following units:")
|
||||
assert_lacks(out, "the following new units were started:")
|
||||
assert_lacks(out, "as well:")
|
||||
# It changed
|
||||
out = machine.succeed("mount | grep 'on /testmount'")
|
||||
assert_contains(out, "size=10240k")
|
||||
|
||||
with subtest("timers"):
|
||||
switch_to_specialisation("with-timer")
|
||||
out = machine.succeed("systemctl show test-timer.timer")
|
||||
assert_contains(out, "OnCalendar=2014-03-25 02:59:56 UTC")
|
||||
|
||||
out = switch_to_specialisation("with-timer-modified")
|
||||
assert_lacks(out, "stopping the following units:")
|
||||
assert_lacks(out, "reloading the following units:")
|
||||
assert_contains(out, "restarting the following units: test-timer.timer\n")
|
||||
assert_lacks(out, "\nstarting the following units:")
|
||||
assert_lacks(out, "the following new units were started:")
|
||||
assert_lacks(out, "as well:")
|
||||
# It changed
|
||||
out = machine.succeed("systemctl show test-timer.timer")
|
||||
assert_contains(out, "OnCalendar=Fri 2012-11-23 16:00:00")
|
||||
|
||||
with subtest("paths"):
|
||||
switch_to_specialisation("with-path")
|
||||
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")
|
||||
switch_to_specialisation("with-path-modified")
|
||||
|
||||
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("with-slice")
|
||||
machine.fail("systemctl start testservice.service")
|
||||
out = switch_to_specialisation("with-slice-non-crashing")
|
||||
machine.succeed("systemctl start testservice.service")
|
||||
machine.succeed("echo 1 > /proc/sys/vm/panic_on_oom") # disallow OOMing
|
||||
|
||||
'';
|
||||
})
|
||||
|
||||
Loading…
Reference in New Issue
Block a user