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import ../make-test-python.nix ({ pkgs, version ? 4, ... }:
let
client =
{ pkgs, ... }:
{ fileSystems = pkgs.lib.mkVMOverride
[ { mountPoint = "/data";
# nfs4 exports the export with fsid=0 as a virtual root directory
device = if (version == 4) then "server:/" else "server:/data";
fsType = "nfs";
options = [ "vers=${toString version}" ];
}
];
networking.firewall.enable = false; # FIXME: only open statd
};
in
{
name = "nfs";
meta = with pkgs.stdenv.lib.maintainers; {
maintainers = [ eelco ];
};
nodes =
{ client1 = client;
client2 = client;
server =
{ ... }:
{ services.nfs.server.enable = true;
services.nfs.server.exports =
''
/data 192.168.1.0/255.255.255.0(rw,no_root_squash,no_subtree_check,fsid=0)
'';
services.nfs.server.createMountPoints = true;
networking.firewall.enable = false; # FIXME: figure out what ports need to be allowed
};
};
testScript =
''
import time
server.wait_for_unit("nfs-server")
server.succeed("systemctl start network-online.target")
server.wait_for_unit("network-online.target")
start_all()
client1.wait_for_unit("data.mount")
client1.succeed("echo bla > /data/foo")
server.succeed("test -e /data/foo")
client2.wait_for_unit("data.mount")
client2.succeed("echo bla > /data/bar")
server.succeed("test -e /data/bar")
with subtest("restarting 'nfs-server' works correctly"):
server.succeed("systemctl restart nfs-server")
# will take 90 seconds due to the NFS grace period
client2.succeed("echo bla >> /data/bar")
with subtest("can get a lock"):
client2.succeed("time flock -n -s /data/lock true")
with subtest("client 2 fails to acquire lock held by client 1"):
client1.succeed("flock -x /data/lock -c 'touch locked; sleep 100000' &")
client1.wait_for_file("locked")
client2.fail("flock -n -s /data/lock true")
with subtest("client 2 obtains lock after resetting client 1"):
client2.succeed(
"flock -x /data/lock -c 'echo acquired; touch locked; sleep 100000' >&2 &"
)
client1.crash()
client1.start()
client2.wait_for_file("locked")
with subtest("locks survive server reboot"):
client1.wait_for_unit("data.mount")
server.shutdown()
server.start()
client1.succeed("touch /data/xyzzy")
client1.fail("time flock -n -s /data/lock true")
with subtest("unmounting during shutdown happens quickly"):
t1 = time.monotonic()
client1.shutdown()
duration = time.monotonic() - t1
assert duration < 30, f"shutdown took too long ({duration} seconds)"
'';
})
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