145 lines
4.2 KiB
Nix
145 lines
4.2 KiB
Nix
# Systemd services for openvswitch
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{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.virtualisation.vswitch;
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in {
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options.virtualisation.vswitch = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = lib.mdDoc ''
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Whether to enable Open vSwitch. A configuration daemon (ovs-server)
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will be started.
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'';
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};
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resetOnStart = mkOption {
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type = types.bool;
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default = false;
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description = lib.mdDoc ''
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Whether to reset the Open vSwitch configuration database to a default
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configuration on every start of the systemd `ovsdb.service`.
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'';
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};
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package = mkOption {
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type = types.package;
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default = pkgs.openvswitch;
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defaultText = literalExpression "pkgs.openvswitch";
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description = lib.mdDoc ''
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Open vSwitch package to use.
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'';
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};
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};
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config = mkIf cfg.enable (let
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# Where the communication sockets live
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runDir = "/run/openvswitch";
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# The path to the an initialized version of the database
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db = pkgs.stdenv.mkDerivation {
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name = "vswitch.db";
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dontUnpack = true;
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buildPhase = "true";
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buildInputs = with pkgs; [
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cfg.package
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];
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installPhase = "mkdir -p $out";
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};
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in {
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environment.systemPackages = [ cfg.package ];
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boot.kernelModules = [ "tun" "openvswitch" ];
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boot.extraModulePackages = [ cfg.package ];
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systemd.services.ovsdb = {
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description = "Open_vSwitch Database Server";
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wantedBy = [ "multi-user.target" ];
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after = [ "systemd-udev-settle.service" ];
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path = [ cfg.package ];
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restartTriggers = [ db cfg.package ];
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# Create the config database
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preStart =
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''
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mkdir -p ${runDir}
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mkdir -p /var/db/openvswitch
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chmod +w /var/db/openvswitch
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${optionalString cfg.resetOnStart "rm -f /var/db/openvswitch/conf.db"}
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if [[ ! -e /var/db/openvswitch/conf.db ]]; then
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${cfg.package}/bin/ovsdb-tool create \
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"/var/db/openvswitch/conf.db" \
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"${cfg.package}/share/openvswitch/vswitch.ovsschema"
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fi
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chmod -R +w /var/db/openvswitch
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if ${cfg.package}/bin/ovsdb-tool needs-conversion /var/db/openvswitch/conf.db | grep -q "yes"
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then
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echo "Performing database upgrade"
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${cfg.package}/bin/ovsdb-tool convert /var/db/openvswitch/conf.db
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else
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echo "Database already up to date"
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fi
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'';
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serviceConfig = {
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ExecStart =
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''
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${cfg.package}/bin/ovsdb-server \
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--remote=punix:${runDir}/db.sock \
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--private-key=db:Open_vSwitch,SSL,private_key \
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--certificate=db:Open_vSwitch,SSL,certificate \
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--bootstrap-ca-cert=db:Open_vSwitch,SSL,ca_cert \
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--unixctl=ovsdb.ctl.sock \
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--pidfile=/run/openvswitch/ovsdb.pid \
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--detach \
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/var/db/openvswitch/conf.db
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'';
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Restart = "always";
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RestartSec = 3;
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PIDFile = "/run/openvswitch/ovsdb.pid";
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# Use service type 'forking' to correctly determine when ovsdb-server is ready.
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Type = "forking";
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};
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postStart = ''
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${cfg.package}/bin/ovs-vsctl --timeout 3 --retry --no-wait init
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'';
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};
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systemd.services.ovs-vswitchd = {
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description = "Open_vSwitch Daemon";
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wantedBy = [ "multi-user.target" ];
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bindsTo = [ "ovsdb.service" ];
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after = [ "ovsdb.service" ];
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path = [ cfg.package ];
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serviceConfig = {
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ExecStart = ''
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${cfg.package}/bin/ovs-vswitchd \
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--pidfile=/run/openvswitch/ovs-vswitchd.pid \
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--detach
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'';
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PIDFile = "/run/openvswitch/ovs-vswitchd.pid";
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# Use service type 'forking' to correctly determine when vswitchd is ready.
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Type = "forking";
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Restart = "always";
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RestartSec = 3;
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};
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};
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});
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imports = [
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(mkRemovedOptionModule [ "virtualisation" "vswitch" "ipsec" ] ''
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OpenVSwitch IPSec functionality has been removed, because it depended on racoon,
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which was removed from nixpkgs, because it was abanoded upstream.
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'')
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];
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meta.maintainers = with maintainers; [ netixx ];
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}
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