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import ./make-test-python.nix ({ pkgs, ... }:
{
name = "systemd-oomd";
# This test is a simplified version of systemd's testsuite-55.
# https://github.com/systemd/systemd/blob/v251/test/units/testsuite-55.sh
nodes.machine = { pkgs, ... }: {
# Limit VM resource usage.
virtualisation.memorySize = 1024;
systemd.oomd.extraConfig.DefaultMemoryPressureDurationSec = "1s";
systemd.slices.workload = {
description = "Test slice for memory pressure kills";
sliceConfig = {
MemoryAccounting = true;
ManagedOOMMemoryPressure = "kill";
ManagedOOMMemoryPressureLimit = "10%";
};
};
systemd.services.testbloat = {
description = "Create a lot of memory pressure";
serviceConfig = {
Slice = "workload.slice";
MemoryHigh = "5M";
ExecStart = "${pkgs.coreutils}/bin/tail /dev/zero";
};
};
systemd.services.testchill = {
description = "No memory pressure";
serviceConfig = {
Slice = "workload.slice";
MemoryHigh = "3M";
ExecStart = "${pkgs.coreutils}/bin/sleep infinity";
};
};
};
testScript = ''
# Start the system.
machine.wait_for_unit("multi-user.target")
machine.succeed("oomctl")
machine.succeed("systemctl start testchill.service")
with subtest("OOMd should kill the bad service"):
machine.fail("systemctl start --wait testbloat.service")
assert machine.get_unit_info("testbloat.service")["Result"] == "oom-kill"
with subtest("Service without memory pressure should be untouched"):
machine.require_unit_state("testchill.service", "active")
'';
})
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