diff options
Diffstat (limited to 'nixpkgs/nixos/modules/testing')
| -rw-r--r-- | nixpkgs/nixos/modules/testing/minimal-kernel.nix | 28 | ||||
| -rw-r--r-- | nixpkgs/nixos/modules/testing/service-runner.nix | 115 | ||||
| -rw-r--r-- | nixpkgs/nixos/modules/testing/test-instrumentation.nix | 134 |
3 files changed, 277 insertions, 0 deletions
diff --git a/nixpkgs/nixos/modules/testing/minimal-kernel.nix b/nixpkgs/nixos/modules/testing/minimal-kernel.nix new file mode 100644 index 00000000000..7c2b9c05cf9 --- /dev/null +++ b/nixpkgs/nixos/modules/testing/minimal-kernel.nix @@ -0,0 +1,28 @@ +{ config, pkgs, lib, ... }: + +let + configfile = builtins.storePath (builtins.toFile "config" (lib.concatStringsSep "\n" + (map (builtins.getAttr "configLine") config.system.requiredKernelConfig)) + ); + + origKernel = pkgs.buildLinux { + inherit (pkgs.linux) src version stdenv; + inherit configfile; + allowImportFromDerivation = true; + kernelPatches = [ pkgs.kernelPatches.cifs_timeout_2_6_38 ]; + }; + + kernel = origKernel // (derivation (origKernel.drvAttrs // { + configurePhase = '' + runHook preConfigure + mkdir ../build + make $makeFlags "''${makeFlagsArray[@]}" mrproper + make $makeFlags "''${makeFlagsArray[@]}" KCONFIG_ALLCONFIG=${configfile} allnoconfig + runHook postConfigure + ''; + })); + + kernelPackages = pkgs.linuxPackagesFor kernel; +in { + boot.kernelPackages = kernelPackages; +} diff --git a/nixpkgs/nixos/modules/testing/service-runner.nix b/nixpkgs/nixos/modules/testing/service-runner.nix new file mode 100644 index 00000000000..17d5e337690 --- /dev/null +++ b/nixpkgs/nixos/modules/testing/service-runner.nix @@ -0,0 +1,115 @@ +{ lib, pkgs, ... }: + +with lib; + +let + + makeScript = name: service: pkgs.writeScript "${name}-runner" + '' + #! ${pkgs.perl}/bin/perl -w -I${pkgs.perlPackages.FileSlurp}/${pkgs.perl.libPrefix} + + use File::Slurp; + + sub run { + my ($cmd) = @_; + my @args = split " ", $cmd; + my $prog; + if (substr($args[0], 0, 1) eq "@") { + $prog = substr($args[0], 1); + shift @args; + } else { + $prog = $args[0]; + } + my $pid = fork; + if ($pid == 0) { + setpgrp; # don't receive SIGINT etc. from terminal + exec { $prog } @args; + die "failed to exec $prog\n"; + } elsif (!defined $pid) { + die "failed to fork: $!\n"; + } + return $pid; + }; + + sub run_wait { + my ($cmd) = @_; + my $pid = run $cmd; + die if waitpid($pid, 0) != $pid; + return $?; + }; + + # Set the environment. FIXME: escaping. + foreach my $key (keys %ENV) { + next if $key eq 'LOCALE_ARCHIVE'; + delete $ENV{$key}; + } + ${concatStrings (mapAttrsToList (n: v: '' + $ENV{'${n}'} = '${v}'; + '') service.environment)} + + # Run the ExecStartPre program. FIXME: this could be a list. + my $preStart = '${service.serviceConfig.ExecStartPre or ""}'; + if ($preStart ne "") { + print STDERR "running ExecStartPre: $preStart\n"; + my $res = run_wait $preStart; + die "$0: ExecStartPre failed with status $res\n" if $res; + }; + + # Run the ExecStart program. + my $cmd = '${service.serviceConfig.ExecStart}'; + print STDERR "running ExecStart: $cmd\n"; + my $mainPid = run $cmd; + $ENV{'MAINPID'} = $mainPid; + + # Catch SIGINT, propagate to the main program. + sub intHandler { + print STDERR "got SIGINT, stopping service...\n"; + kill 'INT', $mainPid; + }; + $SIG{'INT'} = \&intHandler; + $SIG{'QUIT'} = \&intHandler; + + # Run the ExecStartPost program. + my $postStart = '${service.serviceConfig.ExecStartPost or ""}'; + if ($postStart ne "") { + print STDERR "running ExecStartPost: $postStart\n"; + my $res = run_wait $postStart; + die "$0: ExecStartPost failed with status $res\n" if $res; + } + + # Wait for the main program to exit. + die if waitpid($mainPid, 0) != $mainPid; + my $mainRes = $?; + + # Run the ExecStopPost program. + my $postStop = '${service.serviceConfig.ExecStopPost or ""}'; + if ($postStop ne "") { + print STDERR "running ExecStopPost: $postStop\n"; + my $res = run_wait $postStop; + die "$0: ExecStopPost failed with status $res\n" if $res; + } + + exit($mainRes & 127 ? 255 : $mainRes << 8); + ''; + + opts = { config, name, ... }: { + options.runner = mkOption { + internal = true; + description = '' + A script that runs the service outside of systemd, + useful for testing or for using NixOS services outside + of NixOS. + ''; + }; + config.runner = makeScript name config; + }; + +in + +{ + options = { + systemd.services = mkOption { + type = with types; attrsOf (submodule opts); + }; + }; +} diff --git a/nixpkgs/nixos/modules/testing/test-instrumentation.nix b/nixpkgs/nixos/modules/testing/test-instrumentation.nix new file mode 100644 index 00000000000..1a11d9ce7c2 --- /dev/null +++ b/nixpkgs/nixos/modules/testing/test-instrumentation.nix @@ -0,0 +1,134 @@ +# This module allows the test driver to connect to the virtual machine +# via a root shell attached to port 514. + +{ config, lib, pkgs, ... }: + +with lib; +with import ../../lib/qemu-flags.nix { inherit pkgs; }; + +{ + + # This option is a dummy that if used in conjunction with + # modules/virtualisation/qemu-vm.nix gets merged with the same option defined + # there and only is declared here because some modules use + # test-instrumentation.nix but not qemu-vm.nix. + # + # One particular example are the boot tests where we want instrumentation + # within the images but not other stuff like setting up 9p filesystems. + options.virtualisation.qemu.program = mkOption { type = types.path; }; + + config = { + + systemd.services.backdoor = + { wantedBy = [ "multi-user.target" ]; + requires = [ "dev-hvc0.device" "dev-${qemuSerialDevice}.device" ]; + after = [ "dev-hvc0.device" "dev-${qemuSerialDevice}.device" ]; + script = + '' + export USER=root + export HOME=/root + export DISPLAY=:0.0 + + source /etc/profile + + # Don't use a pager when executing backdoor + # actions. Because we use a tty, commands like systemctl + # or nix-store get confused into thinking they're running + # interactively. + export PAGER= + + cd /tmp + exec < /dev/hvc0 > /dev/hvc0 + while ! exec 2> /dev/${qemuSerialDevice}; do sleep 0.1; done + echo "connecting to host..." >&2 + stty -F /dev/hvc0 raw -echo # prevent nl -> cr/nl conversion + echo + PS1= exec /bin/sh + ''; + serviceConfig.KillSignal = "SIGHUP"; + }; + + # Prevent agetty from being instantiated on the serial device, since it + # interferes with the backdoor (writes to it will randomly fail + # with EIO). Likewise for hvc0. + systemd.services."serial-getty@${qemuSerialDevice}".enable = false; + systemd.services."serial-getty@hvc0".enable = false; + + # Only use a serial console, no TTY. + virtualisation.qemu.consoles = [ qemuSerialDevice ]; + + boot.initrd.preDeviceCommands = + '' + echo 600 > /proc/sys/kernel/hung_task_timeout_secs + ''; + + boot.initrd.postDeviceCommands = + '' + # Using acpi_pm as a clock source causes the guest clock to + # slow down under high host load. This is usually a bad + # thing, but for VM tests it should provide a bit more + # determinism (e.g. if the VM runs at lower speed, then + # timeouts in the VM should also be delayed). + echo acpi_pm > /sys/devices/system/clocksource/clocksource0/current_clocksource + ''; + + boot.postBootCommands = + '' + # Panic on out-of-memory conditions rather than letting the + # OOM killer randomly get rid of processes, since this leads + # to failures that are hard to diagnose. + echo 2 > /proc/sys/vm/panic_on_oom + + # Coverage data is written into /tmp/coverage-data. + mkdir -p /tmp/xchg/coverage-data + ''; + + # If the kernel has been built with coverage instrumentation, make + # it available under /proc/gcov. + boot.kernelModules = [ "gcov-proc" ]; + + # Panic if an error occurs in stage 1 (rather than waiting for + # user intervention). + boot.kernelParams = + [ "console=${qemuSerialDevice}" "panic=1" "boot.panic_on_fail" ]; + + # `xwininfo' is used by the test driver to query open windows. + environment.systemPackages = [ pkgs.xorg.xwininfo ]; + + # Log everything to the serial console. + services.journald.extraConfig = + '' + ForwardToConsole=yes + MaxLevelConsole=debug + ''; + + systemd.extraConfig = '' + # Don't clobber the console with duplicate systemd messages. + ShowStatus=no + # Allow very slow start + DefaultTimeoutStartSec=300 + ''; + + boot.consoleLogLevel = 7; + + # Prevent tests from accessing the Internet. + networking.defaultGateway = mkOverride 150 ""; + networking.nameservers = mkOverride 150 [ ]; + + systemd.globalEnvironment.GCOV_PREFIX = "/tmp/xchg/coverage-data"; + + system.requiredKernelConfig = with config.lib.kernelConfig; [ + (isYes "SERIAL_8250_CONSOLE") + (isYes "SERIAL_8250") + (isEnabled "VIRTIO_CONSOLE") + ]; + + networking.usePredictableInterfaceNames = false; + + # Make it easy to log in as root when running the test interactively. + users.users.root.initialHashedPassword = mkOverride 150 ""; + + services.xserver.displayManager.job.logToJournal = true; + }; + +} |