diff options
Diffstat (limited to 'nixos/modules/tasks/network-interfaces-systemd.nix')
-rw-r--r-- | nixos/modules/tasks/network-interfaces-systemd.nix | 69 |
1 files changed, 62 insertions, 7 deletions
diff --git a/nixos/modules/tasks/network-interfaces-systemd.nix b/nixos/modules/tasks/network-interfaces-systemd.nix index e25dc0c0b39..41deceb000e 100644 --- a/nixos/modules/tasks/network-interfaces-systemd.nix +++ b/nixos/modules/tasks/network-interfaces-systemd.nix @@ -1,4 +1,4 @@ -{ config, lib, utils, ... }: +{ config, lib, utils, pkgs, ... }: with utils; with lib; @@ -18,7 +18,10 @@ let concatLists (map (bond: bond.interfaces) (attrValues cfg.bonds)) ++ concatLists (map (bridge: bridge.interfaces) (attrValues cfg.bridges)) ++ map (sit: sit.dev) (attrValues cfg.sits) - ++ map (vlan: vlan.interface) (attrValues cfg.vlans); + ++ map (vlan: vlan.interface) (attrValues cfg.vlans) + # add dependency to physical or independently created vswitch member interface + # TODO: warn the user that any address configured on those interfaces will be useless + ++ concatMap (i: attrNames (filterAttrs (_: config: config.type != "internal") i.interfaces)) (attrValues cfg.vswitches); in @@ -51,11 +54,6 @@ in networking.dhcpcd.enable = mkDefault false; - systemd.services.network-local-commands = { - after = [ "systemd-networkd.service" ]; - bindsTo = [ "systemd-networkd.service" ]; - }; - systemd.network = let domains = cfg.search ++ (optional (cfg.domain != null) cfg.domain); @@ -233,6 +231,63 @@ in # This forces the network interface creator to initialize slaves. networking.interfaces = listToAttrs (map (i: nameValuePair i { }) slaves); + systemd.services = let + # We must escape interfaces due to the systemd interpretation + subsystemDevice = interface: + "sys-subsystem-net-devices-${escapeSystemdPath interface}.device"; + # support for creating openvswitch switches + createVswitchDevice = n: v: nameValuePair "${n}-netdev" + (let + deps = map subsystemDevice (attrNames (filterAttrs (_: config: config.type != "internal") v.interfaces)); + ofRules = pkgs.writeText "vswitch-${n}-openFlowRules" v.openFlowRules; + in + { description = "Open vSwitch Interface ${n}"; + wantedBy = [ "network.target" (subsystemDevice n) ]; + # and create bridge before systemd-networkd starts because it might create internal interfaces + before = [ "systemd-networkd.service" ]; + # shutdown the bridge when network is shutdown + partOf = [ "network.target" ]; + # requires ovs-vswitchd to be alive at all times + bindsTo = [ "ovs-vswitchd.service" ]; + # start switch after physical interfaces and vswitch daemon + after = [ "network-pre.target" "ovs-vswitchd.service" ] ++ deps; + wants = deps; # if one or more interface fails, the switch should continue to run + serviceConfig.Type = "oneshot"; + serviceConfig.RemainAfterExit = true; + path = [ pkgs.iproute config.virtualisation.vswitch.package ]; + preStart = '' + echo "Resetting Open vSwitch ${n}..." + ovs-vsctl --if-exists del-br ${n} -- add-br ${n} \ + -- set bridge ${n} protocols=${concatStringsSep "," v.supportedOpenFlowVersions} + ''; + script = '' + echo "Configuring Open vSwitch ${n}..." + ovs-vsctl ${concatStrings (mapAttrsToList (name: config: " -- add-port ${n} ${name}" + optionalString (config.vlan != null) " tag=${toString config.vlan}") v.interfaces)} \ + ${concatStrings (mapAttrsToList (name: config: optionalString (config.type != null) " -- set interface ${name} type=${config.type}") v.interfaces)} \ + ${concatMapStrings (x: " -- set-controller ${n} " + x) v.controllers} \ + ${concatMapStrings (x: " -- " + x) (splitString "\n" v.extraOvsctlCmds)} + + + echo "Adding OpenFlow rules for Open vSwitch ${n}..." + ovs-ofctl --protocols=${v.openFlowVersion} add-flows ${n} ${ofRules} + ''; + postStop = '' + echo "Cleaning Open vSwitch ${n}" + echo "Shuting down internal ${n} interface" + ip link set ${n} down || true + echo "Deleting flows for ${n}" + ovs-ofctl --protocols=${v.openFlowVersion} del-flows ${n} || true + echo "Deleting Open vSwitch ${n}" + ovs-vsctl --if-exists del-br ${n} || true + ''; + }); + in mapAttrs' createVswitchDevice cfg.vswitches + // { + "network-local-commands" = { + after = [ "systemd-networkd.service" ]; + bindsTo = [ "systemd-networkd.service" ]; + }; + }; }; } |