nix-super/tests/nixos/cgroups/default.nix

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Nix
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2024-09-03 20:27:56 +03:00
{ nixpkgs, ... }:
{
name = "cgroups";
nodes =
{
host =
{ config, pkgs, ... }:
{ virtualisation.additionalPaths = [ pkgs.stdenvNoCC ];
nix.extraOptions =
''
extra-experimental-features = nix-command auto-allocate-uids cgroups
extra-system-features = uid-range
'';
nix.settings.use-cgroups = true;
nix.nixPath = [ "nixpkgs=${nixpkgs}" ];
};
};
testScript = { nodes }: ''
start_all()
host.wait_for_unit("multi-user.target")
# Start build in background
host.execute("NIX_REMOTE=daemon nix build --auto-allocate-uids --file ${./hang.nix} >&2 &")
service = "/sys/fs/cgroup/system.slice/nix-daemon.service"
# Wait for cgroups to be created
host.succeed(f"until [ -e {service}/nix-daemon ]; do sleep 1; done", timeout=30)
host.succeed(f"until [ -e {service}/nix-build-uid-* ]; do sleep 1; done", timeout=30)
# Check that there aren't processes where there shouldn't be, and that there are where there should be
host.succeed(f'[ -z "$(cat {service}/cgroup.procs)" ]')
host.succeed(f'[ -n "$(cat {service}/nix-daemon/cgroup.procs)" ]')
host.succeed(f'[ -n "$(cat {service}/nix-build-uid-*/cgroup.procs)" ]')
'';
}