diff options
Diffstat (limited to 'nixos/modules/virtualisation/openvswitch.nix')
-rw-r--r-- | nixos/modules/virtualisation/openvswitch.nix | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/nixos/modules/virtualisation/openvswitch.nix b/nixos/modules/virtualisation/openvswitch.nix new file mode 100644 index 00000000000..436a375fb5e --- /dev/null +++ b/nixos/modules/virtualisation/openvswitch.nix @@ -0,0 +1,145 @@ +# Systemd services for openvswitch + +{ config, lib, pkgs, ... }: + +with lib; + +let + cfg = config.virtualisation.vswitch; + +in { + + options.virtualisation.vswitch = { + enable = mkOption { + type = types.bool; + default = false; + description = '' + Whether to enable Open vSwitch. A configuration daemon (ovs-server) + will be started. + ''; + }; + + resetOnStart = mkOption { + type = types.bool; + default = false; + description = '' + Whether to reset the Open vSwitch configuration database to a default + configuration on every start of the systemd <literal>ovsdb.service</literal>. + ''; + }; + + package = mkOption { + type = types.package; + default = pkgs.openvswitch; + defaultText = literalExpression "pkgs.openvswitch"; + description = '' + Open vSwitch package to use. + ''; + }; + }; + + config = mkIf cfg.enable (let + + # Where the communication sockets live + runDir = "/run/openvswitch"; + + # The path to the an initialized version of the database + db = pkgs.stdenv.mkDerivation { + name = "vswitch.db"; + dontUnpack = true; + buildPhase = "true"; + buildInputs = with pkgs; [ + cfg.package + ]; + installPhase = "mkdir -p $out"; + }; + + in { + environment.systemPackages = [ cfg.package ]; + boot.kernelModules = [ "tun" "openvswitch" ]; + + boot.extraModulePackages = [ cfg.package ]; + + systemd.services.ovsdb = { + description = "Open_vSwitch Database Server"; + wantedBy = [ "multi-user.target" ]; + after = [ "systemd-udev-settle.service" ]; + path = [ cfg.package ]; + restartTriggers = [ db cfg.package ]; + # Create the config database + preStart = + '' + mkdir -p ${runDir} + mkdir -p /var/db/openvswitch + chmod +w /var/db/openvswitch + ${optionalString cfg.resetOnStart "rm -f /var/db/openvswitch/conf.db"} + if [[ ! -e /var/db/openvswitch/conf.db ]]; then + ${cfg.package}/bin/ovsdb-tool create \ + "/var/db/openvswitch/conf.db" \ + "${cfg.package}/share/openvswitch/vswitch.ovsschema" + fi + chmod -R +w /var/db/openvswitch + if ${cfg.package}/bin/ovsdb-tool needs-conversion /var/db/openvswitch/conf.db | grep -q "yes" + then + echo "Performing database upgrade" + ${cfg.package}/bin/ovsdb-tool convert /var/db/openvswitch/conf.db + else + echo "Database already up to date" + fi + ''; + serviceConfig = { + ExecStart = + '' + ${cfg.package}/bin/ovsdb-server \ + --remote=punix:${runDir}/db.sock \ + --private-key=db:Open_vSwitch,SSL,private_key \ + --certificate=db:Open_vSwitch,SSL,certificate \ + --bootstrap-ca-cert=db:Open_vSwitch,SSL,ca_cert \ + --unixctl=ovsdb.ctl.sock \ + --pidfile=/run/openvswitch/ovsdb.pid \ + --detach \ + /var/db/openvswitch/conf.db + ''; + Restart = "always"; + RestartSec = 3; + PIDFile = "/run/openvswitch/ovsdb.pid"; + # Use service type 'forking' to correctly determine when ovsdb-server is ready. + Type = "forking"; + }; + postStart = '' + ${cfg.package}/bin/ovs-vsctl --timeout 3 --retry --no-wait init + ''; + }; + + systemd.services.ovs-vswitchd = { + description = "Open_vSwitch Daemon"; + wantedBy = [ "multi-user.target" ]; + bindsTo = [ "ovsdb.service" ]; + after = [ "ovsdb.service" ]; + path = [ cfg.package ]; + serviceConfig = { + ExecStart = '' + ${cfg.package}/bin/ovs-vswitchd \ + --pidfile=/run/openvswitch/ovs-vswitchd.pid \ + --detach + ''; + PIDFile = "/run/openvswitch/ovs-vswitchd.pid"; + # Use service type 'forking' to correctly determine when vswitchd is ready. + Type = "forking"; + Restart = "always"; + RestartSec = 3; + }; + }; + + }); + + imports = [ + (mkRemovedOptionModule [ "virtualisation" "vswitch" "ipsec" ] '' + OpenVSwitch IPSec functionality has been removed, because it depended on racoon, + which was removed from nixpkgs, because it was abanoded upstream. + '') + ]; + + meta.maintainers = with maintainers; [ netixx ]; + +} |