nixpkgs/nixos/modules/services/network-filesystems/nfsd.nix
Lluís Batlle i Rossell 9f6afb7d78 Fixing nfsd service, wait on local-fs.
Otherwise, mountd was started exporting directories before local-fs was ready,
and it failed to start nfsd on missing fs.
2016-05-06 15:03:30 +02:00

166 lines
4.2 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.nfs.server;
exports = pkgs.writeText "exports" cfg.exports;
in
{
###### interface
options = {
services.nfs = {
server = {
enable = mkOption {
default = false;
description = ''
Whether to enable the kernel's NFS server.
'';
};
exports = mkOption {
default = "";
description = ''
Contents of the /etc/exports file. See
<citerefentry><refentrytitle>exports</refentrytitle>
<manvolnum>5</manvolnum></citerefentry> for the format.
'';
};
hostName = mkOption {
default = null;
description = ''
Hostname or address on which NFS requests will be accepted.
Default is all. See the <option>-H</option> option in
<citerefentry><refentrytitle>nfsd</refentrytitle>
<manvolnum>8</manvolnum></citerefentry>.
'';
};
nproc = mkOption {
default = 8;
description = ''
Number of NFS server threads. Defaults to the recommended value of 8.
'';
};
createMountPoints = mkOption {
default = false;
description = "Whether to create the mount points in the exports file at startup time.";
};
mountdPort = mkOption {
default = null;
example = 4002;
description = ''
Use fixed port for rpc.mountd, useful if server is behind firewall.
'';
};
lockdPort = mkOption {
default = 0;
description = ''
Fix the lockd port number. This can help setting firewall rules for NFS.
'';
};
};
};
};
###### implementation
config = mkIf cfg.enable {
services.rpcbind.enable = true;
boot.supportedFilesystems = [ "nfs" ]; # needed for statd and idmapd
environment.systemPackages = [ pkgs.nfs-utils ];
environment.etc.exports.source = exports;
boot.kernelModules = [ "nfsd" ];
systemd.services.nfsd =
{ description = "NFS Server";
wantedBy = [ "multi-user.target" ];
requires = [ "rpcbind.service" "mountd.service" ];
after = [ "rpcbind.service" "mountd.service" "idmapd.service" ];
before = [ "statd.service" ];
path = [ pkgs.nfs-utils ];
script =
''
# Create a state directory required by NFSv4.
mkdir -p /var/lib/nfs/v4recovery
${pkgs.procps}/sbin/sysctl -w fs.nfs.nlm_tcpport=${builtins.toString cfg.lockdPort}
${pkgs.procps}/sbin/sysctl -w fs.nfs.nlm_udpport=${builtins.toString cfg.lockdPort}
rpc.nfsd \
${if cfg.hostName != null then "-H ${cfg.hostName}" else ""} \
${builtins.toString cfg.nproc}
'';
postStop = "rpc.nfsd 0";
serviceConfig.Type = "oneshot";
serviceConfig.RemainAfterExit = true;
};
systemd.services.mountd =
{ description = "NFSv3 Mount Daemon";
requires = [ "rpcbind.service" ];
after = [ "rpcbind.service" "local-fs.target" ];
path = [ pkgs.nfs-utils pkgs.sysvtools pkgs.utillinux ];
preStart =
''
mkdir -p /var/lib/nfs
touch /var/lib/nfs/rmtab
mountpoint -q /proc/fs/nfsd || mount -t nfsd none /proc/fs/nfsd
${optionalString cfg.createMountPoints
''
# create export directories:
# skip comments, take first col which may either be a quoted
# "foo bar" or just foo (-> man export)
sed '/^#.*/d;s/^"\([^"]*\)".*/\1/;t;s/[ ].*//' ${exports} \
| xargs -d '\n' mkdir -p
''
}
exportfs -rav
'';
restartTriggers = [ exports ];
serviceConfig.Type = "forking";
serviceConfig.ExecStart = ''
@${pkgs.nfs-utils}/sbin/rpc.mountd rpc.mountd \
${if cfg.mountdPort != null then "-p ${toString cfg.mountdPort}" else ""}
'';
serviceConfig.Restart = "always";
};
};
}