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import ./make-test-python.nix (
{ lib, ... }:
{
name = "swapspace";
meta = with lib.maintainers; {
maintainers = [
Luflosi
phanirithvij
];
};
nodes.machine = {
virtualisation.memorySize = 512;
services.swapspace = {
enable = true;
extraArgs = [ "-v" ];
settings = {
# test outside /var/lib/swapspace
swappath = "/swamp";
cooldown = 1;
};
};
swapDevices = lib.mkOverride 0 [
{
size = 127;
device = "/root/swapfile";
}
];
boot.kernel.sysctl."vm.swappiness" = 60;
};
testScript = ''
machine.wait_for_unit("multi-user.target")
machine.wait_for_unit("swapspace.service")
machine.wait_for_unit("root-swapfile.swap")
# ensure swapspace wrapper command runs
machine.succeed("swapspace --inspect")
swamp = False
with subtest("swapspace works"):
machine.execute("mkdir /root/memfs")
machine.execute("mount -o size=2G -t tmpfs none /root/memfs")
i = 0
while i < 14:
print(machine.succeed("free -h"))
out = machine.succeed("sh -c 'swapon --show --noheadings --raw --bytes | grep /root/swapfile'")
row = out.split(' ')
# leave 1MB free to not get killed by oom
freebytes=int(row[2]) - int(row[3]) - 1*1024*1024
machine.succeed(f"dd if=/dev/random of=/root/memfs/{i} bs={freebytes} count=1")
machine.sleep(1)
out = machine.succeed("swapon --show")
print(out)
swamp = "/swamp" in out
if not swamp:
i += 1
else:
print("*"*10, "SWAPED", "*"*10)
machine.succeed("rm -f /root/memfs/*")
break
print(machine.succeed("swapspace -e -s /swamp"))
assert "/swamp" not in machine.execute("swapon --show")
assert swamp
'';
}
)
|
