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38 lines
1.3 KiB
Nix
38 lines
1.3 KiB
Nix
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import ./make-test-python.nix ({ pkgs, ... }:
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{
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name = "systemd-oomd";
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nodes.machine = { pkgs, ... }: {
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systemd.oomd.extraConfig.DefaultMemoryPressureDurationSec = "1s"; # makes the test faster
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# Kill cgroups when more than 1% pressure is encountered
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systemd.slices."-".sliceConfig = {
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ManagedOOMMemoryPressure = "kill";
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ManagedOOMMemoryPressureLimit = "1%";
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};
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# A service to bring the system under memory pressure
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systemd.services.testservice = {
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serviceConfig.ExecStart = "${pkgs.coreutils}/bin/tail /dev/zero";
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};
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# Do not kill the backdoor
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systemd.services.backdoor.serviceConfig.ManagedOOMMemoryPressure = "auto";
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virtualisation.memorySize = 1024;
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};
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testScript = ''
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# Start the system
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machine.wait_for_unit("multi-user.target")
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machine.succeed("oomctl")
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# Bring the system into memory pressure
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machine.succeed("echo 0 > /proc/sys/vm/panic_on_oom") # NixOS tests kill the VM when the OOM killer is invoked - override this
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machine.succeed("systemctl start testservice")
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# Wait for oomd to kill something
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# Matches these lines:
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# systemd-oomd[508]: Killed /system.slice/systemd-udevd.service due to memory pressure for / being 3.26% > 1.00% for > 1s with reclaim activity
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machine.wait_until_succeeds("journalctl -b | grep -q 'due to memory pressure for'")
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'';
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})
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