nixpkgs/nixos/modules/virtualisation/openvswitch.nix

121 lines
3.5 KiB
Nix

# 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 =
''
Enable Open vSwitch. A configuration
daemon (ovs-server) will be started.
'';
};
virtualisation.vswitch.package = mkOption {
type = types.package;
default = pkgs.openvswitch;
description =
''
Open vSwitch package to use.
'';
};
};
# ------------------------------------------------------------
config = mkIf cfg.enable (let
# Where the communication sockets live
runDir = "/var/run/openvswitch";
# Where the config database live (can't be in nix-store)
stateDir = "/var/db/openvswitch";
# The path to the an initialized version of the database
db = pkgs.stdenv.mkDerivation {
name = "vswitch.db";
unpackPhase = "true";
buildPhase = "true";
buildInputs = with pkgs; [
cfg.package
];
installPhase =
''
ensureDir $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" ];
wants = [ "vswitchd.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
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
'';
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 \
/var/db/openvswitch/conf.db
'';
serviceConfig.Restart = "always";
serviceConfig.RestartSec = 3;
postStart =
''
${cfg.package}/bin/ovs-vsctl --timeout 3 --retry --no-wait init
'';
};
systemd.services.vswitchd = {
description = "Open_vSwitch Daemon";
bindsTo = [ "ovsdb.service" ];
after = [ "ovsdb.service" ];
path = [ cfg.package ];
serviceConfig.ExecStart = ''${cfg.package}/bin/ovs-vswitchd'';
};
});
}