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29027fd1e1
Using pkgs.lib on the spine of module evaluation is problematic because the pkgs argument depends on the result of module evaluation. To prevent an infinite recursion, pkgs and some of the modules are evaluated twice, which is inefficient. Using ‘with lib’ prevents this problem.
148 lines
3.5 KiB
Nix
148 lines
3.5 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.nfs.server;
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exports = pkgs.writeText "exports" cfg.exports;
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in
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{
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###### interface
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options = {
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services.nfs = {
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server = {
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enable = mkOption {
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default = false;
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description = ''
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Whether to enable the kernel's NFS server.
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'';
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};
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exports = mkOption {
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default = "";
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description = ''
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Contents of the /etc/exports file. See
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<citerefentry><refentrytitle>exports</refentrytitle>
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<manvolnum>5</manvolnum></citerefentry> for the format.
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'';
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};
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hostName = mkOption {
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default = null;
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description = ''
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Hostname or address on which NFS requests will be accepted.
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Default is all. See the <option>-H</option> option in
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<citerefentry><refentrytitle>nfsd</refentrytitle>
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<manvolnum>8</manvolnum></citerefentry>.
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'';
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};
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nproc = mkOption {
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default = 8;
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description = ''
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Number of NFS server threads. Defaults to the recommended value of 8.
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'';
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};
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createMountPoints = mkOption {
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default = false;
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description = "Whether to create the mount points in the exports file at startup time.";
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};
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};
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};
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};
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###### implementation
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config = mkIf cfg.enable {
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services.rpcbind.enable = true;
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boot.supportedFilesystems = [ "nfs" ]; # needed for statd and idmapd
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environment.systemPackages = [ pkgs.nfsUtils ];
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environment.etc = singleton
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{ source = exports;
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target = "exports";
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};
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boot.kernelModules = [ "nfsd" ];
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systemd.services.nfsd =
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{ description = "NFS Server";
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wantedBy = [ "multi-user.target" ];
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requires = [ "rpcbind.service" "mountd.service" ];
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after = [ "rpcbind.service" "mountd.service" "idmapd.service" ];
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before = [ "statd.service" ];
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path = [ pkgs.nfsUtils ];
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script =
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''
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# Create a state directory required by NFSv4.
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mkdir -p /var/lib/nfs/v4recovery
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rpc.nfsd \
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${if cfg.hostName != null then "-H ${cfg.hostName}" else ""} \
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${builtins.toString cfg.nproc}
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'';
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postStop = "rpc.nfsd 0";
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serviceConfig.Type = "oneshot";
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serviceConfig.RemainAfterExit = true;
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};
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systemd.services.mountd =
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{ description = "NFSv3 Mount Daemon";
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requires = [ "rpcbind.service" ];
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after = [ "rpcbind.service" ];
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path = [ pkgs.nfsUtils pkgs.sysvtools pkgs.utillinux ];
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preStart =
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''
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mkdir -p /var/lib/nfs
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touch /var/lib/nfs/rmtab
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mountpoint -q /proc/fs/nfsd || mount -t nfsd none /proc/fs/nfsd
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${optionalString cfg.createMountPoints
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''
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# create export directories:
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# skip comments, take first col which may either be a quoted
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# "foo bar" or just foo (-> man export)
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sed '/^#.*/d;s/^"\([^"]*\)".*/\1/;t;s/[ ].*//' ${exports} \
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| xargs -d '\n' mkdir -p
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''
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}
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exportfs -rav
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'';
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restartTriggers = [ exports ];
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serviceConfig.Type = "forking";
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serviceConfig.ExecStart = "@${pkgs.nfsUtils}/sbin/rpc.mountd rpc.mountd";
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serviceConfig.Restart = "always";
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};
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};
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}
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