169 lines
4.6 KiB
Nix
169 lines
4.6 KiB
Nix
{ config, pkgs, ... }:
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with pkgs.lib;
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let
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inherit (pkgs) writeText openssh;
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cfg = config.services.nfsKernel;
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in
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{
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###### interface
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options = {
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services.nfsKernel = {
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client.enable = mkOption {
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default = false;
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description = ''
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Whether to enable the kernel's NFS client daemons.
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'';
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};
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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 = {
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services.portmap.enable = cfg.client.enable || cfg.server.enable;
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assertions = mkIf (cfg.client.enable || cfg.server.enable) (singleton
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{ assertion = cfg.client.enable || cfg.server.enable;
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message = "Please enable portmap (services.portmap.enable) to use nfs-kernel.";
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});
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environment.etc = mkIf cfg.server.enable (singleton
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{ source = pkgs.writeText "exports" cfg.server.exports;
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target = "exports";
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});
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jobs =
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optionalAttrs cfg.server.enable
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{ nfs_kernel_exports =
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{ name = "nfs-kernel-exports";
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description = "Kernel NFS server";
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startOn = "started network-interfaces";
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stopOn = "stopping network-interfaces";
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preStart =
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''
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export PATH=${pkgs.nfsUtils}/sbin:$PATH
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mkdir -p /var/lib/nfs
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${config.system.sbin.modprobe}/sbin/modprobe nfsd || true
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${optionalString cfg.server.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/[ ].*//' ${cfg.server.exports} \
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| xargs -d '\n' mkdir -p
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''
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}
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# exports file is ${cfg.server.exports}
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# keep this comment so that this job is restarted whenever exports changes!
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exportfs -ra
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'';
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};
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}
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// optionalAttrs cfg.server.enable
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{ nfs_kernel_nfsd =
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{ name = "nfs-kernel-nfsd";
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description = "Kernel NFS server";
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startOn = "started nfs-kernel-exports and started portmap";
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stopOn = "stopping nfs-kernel-exports";
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exec = "${pkgs.nfsUtils}/sbin/rpc.nfsd ${if cfg.server.hostName != null then "-H ${cfg.server.hostName}" else ""} ${builtins.toString cfg.server.nproc}";
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};
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}
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// optionalAttrs cfg.server.enable
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{ nfs_kernel_mountd =
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{ name = "nfs-kernel-mountd";
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description = "Kernel NFS server - mount daemon";
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startOn = "started nfs-kernel-nfsd and started portmap";
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stopOn = "stopping nfs-kernel-exports";
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exec = "${pkgs.nfsUtils}/sbin/rpc.mountd -F -f /etc/exports";
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};
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}
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// optionalAttrs (cfg.client.enable || cfg.server.enable)
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{ nfs_kernel_statd =
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{ name = "nfs-kernel-statd";
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description = "Kernel NFS server - Network Status Monitor";
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startOn = "${if cfg.server.enable then "started nfs-kernel-nfsd and " else ""} started portmap";
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stopOn = "stopping nfs-kernel-exports";
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preStart =
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''
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mkdir -p /var/lib/nfs
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'';
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exec = "${pkgs.nfsUtils}/sbin/rpc.statd -F";
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};
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};
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};
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}
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