07e0c0e0a2
Reverse the PartOf dependency between network-setup and network-addresses-* This was joint work of: @nh2, @domenkozar, @fpletz, @aszlig and @basvandijk at the NixCon 2017 hackathon.
489 lines
20 KiB
Nix
489 lines
20 KiB
Nix
{ config, lib, pkgs, utils, ... }:
|
||
|
||
with utils;
|
||
with lib;
|
||
|
||
let
|
||
|
||
cfg = config.networking;
|
||
interfaces = attrValues cfg.interfaces;
|
||
hasVirtuals = any (i: i.virtual) interfaces;
|
||
|
||
slaves = concatMap (i: i.interfaces) (attrValues cfg.bonds)
|
||
++ concatMap (i: i.interfaces) (attrValues cfg.bridges)
|
||
++ concatMap (i: i.interfaces) (attrValues cfg.vswitches)
|
||
++ concatMap (i: [i.interface]) (attrValues cfg.macvlans)
|
||
++ concatMap (i: [i.interface]) (attrValues cfg.vlans);
|
||
|
||
# We must escape interfaces due to the systemd interpretation
|
||
subsystemDevice = interface:
|
||
"sys-subsystem-net-devices-${escapeSystemdPath interface}.device";
|
||
|
||
interfaceIps = i:
|
||
i.ip4 ++ optionals cfg.enableIPv6 i.ip6
|
||
++ optional (i.ipAddress != null) {
|
||
address = i.ipAddress;
|
||
prefixLength = i.prefixLength;
|
||
} ++ optional (cfg.enableIPv6 && i.ipv6Address != null) {
|
||
address = i.ipv6Address;
|
||
prefixLength = i.ipv6PrefixLength;
|
||
};
|
||
|
||
destroyBond = i: ''
|
||
while true; do
|
||
UPDATED=1
|
||
SLAVES=$(ip link | grep 'master ${i}' | awk -F: '{print $2}')
|
||
for I in $SLAVES; do
|
||
UPDATED=0
|
||
ip link set "$I" nomaster
|
||
done
|
||
[ "$UPDATED" -eq "1" ] && break
|
||
done
|
||
ip link set "${i}" down 2>/dev/null || true
|
||
ip link del "${i}" 2>/dev/null || true
|
||
'';
|
||
|
||
# warn that these attributes are deprecated (2017-2-2)
|
||
# Should be removed in the release after next
|
||
bondDeprecation = rec {
|
||
deprecated = [ "lacp_rate" "miimon" "mode" "xmit_hash_policy" ];
|
||
filterDeprecated = bond: (filterAttrs (attrName: attr:
|
||
elem attrName deprecated && attr != null) bond);
|
||
};
|
||
|
||
bondWarnings =
|
||
let oneBondWarnings = bondName: bond:
|
||
mapAttrsToList (bondText bondName) (bondDeprecation.filterDeprecated bond);
|
||
bondText = bondName: optName: _:
|
||
"${bondName}.${optName} is deprecated, use ${bondName}.driverOptions";
|
||
in {
|
||
warnings = flatten (mapAttrsToList oneBondWarnings cfg.bonds);
|
||
};
|
||
|
||
normalConfig = {
|
||
|
||
systemd.services =
|
||
let
|
||
|
||
deviceDependency = dev:
|
||
# Use systemd service if we manage device creation, else
|
||
# trust udev when not in a container
|
||
if (hasAttr dev (filterAttrs (k: v: v.virtual) cfg.interfaces)) ||
|
||
(hasAttr dev cfg.bridges) ||
|
||
(hasAttr dev cfg.bonds) ||
|
||
(hasAttr dev cfg.macvlans) ||
|
||
(hasAttr dev cfg.sits) ||
|
||
(hasAttr dev cfg.vlans) ||
|
||
(hasAttr dev cfg.vswitches) ||
|
||
(hasAttr dev cfg.wlanInterfaces)
|
||
then [ "${dev}-netdev.service" ]
|
||
else optional (dev != null && dev != "lo" && !config.boot.isContainer) (subsystemDevice dev);
|
||
|
||
hasDefaultGatewaySet = (cfg.defaultGateway != null && cfg.defaultGateway.address != "")
|
||
|| (cfg.defaultGateway6 != null && cfg.defaultGateway6.address != "");
|
||
|
||
networkLocalCommands = {
|
||
after = [ "network-setup.service" ];
|
||
bindsTo = [ "network-setup.service" ];
|
||
};
|
||
|
||
networkSetup =
|
||
{ description = "Networking Setup";
|
||
|
||
after = [ "network-pre.target" "systemd-udevd.service" "systemd-sysctl.service" ];
|
||
before = [ "network.target" "shutdown.target" ];
|
||
wants = [ "network.target" ];
|
||
partOf = map (i: "network-addresses-${i.name}.service") interfaces;
|
||
conflicts = [ "shutdown.target" ];
|
||
wantedBy = [ "multi-user.target" ] ++ optional hasDefaultGatewaySet "network-online.target";
|
||
|
||
unitConfig.ConditionCapability = "CAP_NET_ADMIN";
|
||
|
||
path = [ pkgs.iproute ];
|
||
|
||
serviceConfig = {
|
||
Type = "oneshot";
|
||
RemainAfterExit = true;
|
||
};
|
||
|
||
unitConfig.DefaultDependencies = false;
|
||
|
||
script =
|
||
''
|
||
# Set the static DNS configuration, if given.
|
||
${pkgs.openresolv}/sbin/resolvconf -m 1 -a static <<EOF
|
||
${optionalString (cfg.nameservers != [] && cfg.domain != null) ''
|
||
domain ${cfg.domain}
|
||
''}
|
||
${optionalString (cfg.search != []) ("search " + concatStringsSep " " cfg.search)}
|
||
${flip concatMapStrings cfg.nameservers (ns: ''
|
||
nameserver ${ns}
|
||
'')}
|
||
EOF
|
||
|
||
# Set the default gateway.
|
||
${optionalString (cfg.defaultGateway != null && cfg.defaultGateway.address != "") ''
|
||
${optionalString (cfg.defaultGateway.interface != null) ''
|
||
ip route replace ${cfg.defaultGateway.address} dev ${cfg.defaultGateway.interface} ${optionalString (cfg.defaultGateway.metric != null)
|
||
"metric ${toString cfg.defaultGateway.metric}"
|
||
} proto static
|
||
''}
|
||
ip route replace default ${optionalString (cfg.defaultGateway.metric != null)
|
||
"metric ${toString cfg.defaultGateway.metric}"
|
||
} via "${cfg.defaultGateway.address}" ${
|
||
optionalString (cfg.defaultGatewayWindowSize != null)
|
||
"window ${toString cfg.defaultGatewayWindowSize}"} ${
|
||
optionalString (cfg.defaultGateway.interface != null)
|
||
"dev ${cfg.defaultGateway.interface}"} proto static
|
||
''}
|
||
${optionalString (cfg.defaultGateway6 != null && cfg.defaultGateway6.address != "") ''
|
||
${optionalString (cfg.defaultGateway6.interface != null) ''
|
||
ip -6 route replace ${cfg.defaultGateway6.address} dev ${cfg.defaultGateway6.interface} ${optionalString (cfg.defaultGateway6.metric != null)
|
||
"metric ${toString cfg.defaultGateway6.metric}"
|
||
} proto static
|
||
''}
|
||
ip -6 route replace default ${optionalString (cfg.defaultGateway6.metric != null)
|
||
"metric ${toString cfg.defaultGateway6.metric}"
|
||
} via "${cfg.defaultGateway6.address}" ${
|
||
optionalString (cfg.defaultGatewayWindowSize != null)
|
||
"window ${toString cfg.defaultGatewayWindowSize}"} ${
|
||
optionalString (cfg.defaultGateway6.interface != null)
|
||
"dev ${cfg.defaultGateway6.interface}"} proto static
|
||
''}
|
||
'';
|
||
};
|
||
|
||
# For each interface <foo>, create a job ‘network-addresses-<foo>.service"
|
||
# that performs static address configuration. It has a "wants"
|
||
# dependency on ‘<foo>.service’, which is supposed to create
|
||
# the interface and need not exist (i.e. for hardware
|
||
# interfaces). It has a binds-to dependency on the actual
|
||
# network device, so it only gets started after the interface
|
||
# has appeared, and it's stopped when the interface
|
||
# disappears.
|
||
configureAddrs = i:
|
||
let
|
||
ips = interfaceIps i;
|
||
in
|
||
nameValuePair "network-addresses-${i.name}"
|
||
{ description = "Address configuration of ${i.name}";
|
||
wantedBy = [
|
||
"network-setup.service"
|
||
"network-link-${i.name}.service"
|
||
"network.target"
|
||
];
|
||
# order before network-setup because the routes that are configured
|
||
# there may need ip addresses configured
|
||
before = [ "network-setup.service" ];
|
||
bindsTo = deviceDependency i.name;
|
||
after = [ "network-pre.target" ] ++ (deviceDependency i.name);
|
||
serviceConfig.Type = "oneshot";
|
||
serviceConfig.RemainAfterExit = true;
|
||
# Restart rather than stop+start this unit to prevent the
|
||
# network from dying during switch-to-configuration.
|
||
stopIfChanged = false;
|
||
path = [ pkgs.iproute ];
|
||
script =
|
||
''
|
||
# FIXME: shouldn't this be done in network-link?
|
||
echo "bringing up interface..."
|
||
ip link set "${i.name}" up
|
||
|
||
state="/run/nixos/network/addresses/${i.name}"
|
||
|
||
mkdir -p $(dirname "$state")
|
||
|
||
'' + flip concatMapStrings (ips) (ip:
|
||
let
|
||
address = "${ip.address}/${toString ip.prefixLength}";
|
||
in
|
||
''
|
||
echo "${address}" >> $state
|
||
if out=$(ip addr add "${address}" dev "${i.name}" 2>&1); then
|
||
echo "added ip ${address}"
|
||
elif ! echo "$out" | grep "File exists" >/dev/null 2>&1; then
|
||
echo "failed to add ${address}"
|
||
exit 1
|
||
fi
|
||
'');
|
||
preStop = ''
|
||
state="/run/nixos/network/addresses/${i.name}"
|
||
while read address; do
|
||
echo -n "deleting $address..."
|
||
ip addr del "$address" dev "${i.name}" >/dev/null 2>&1 || echo -n " Failed"
|
||
echo ""
|
||
done < "$state"
|
||
rm -f "$state"
|
||
'';
|
||
};
|
||
|
||
createTunDevice = i: nameValuePair "${i.name}-netdev"
|
||
{ description = "Virtual Network Interface ${i.name}";
|
||
bindsTo = [ "dev-net-tun.device" ];
|
||
after = [ "dev-net-tun.device" "network-pre.target" ];
|
||
wantedBy = [ "network-setup.service" (subsystemDevice i.name) ];
|
||
partOf = [ "network-setup.service" ];
|
||
before = [ "network-setup.service" ];
|
||
path = [ pkgs.iproute ];
|
||
serviceConfig = {
|
||
Type = "oneshot";
|
||
RemainAfterExit = true;
|
||
};
|
||
script = ''
|
||
ip tuntap add dev "${i.name}" \
|
||
${optionalString (i.virtualType != null) "mode ${i.virtualType}"} \
|
||
user "${i.virtualOwner}"
|
||
'';
|
||
postStop = ''
|
||
ip link del ${i.name} || true
|
||
'';
|
||
};
|
||
|
||
createBridgeDevice = n: v: nameValuePair "${n}-netdev"
|
||
(let
|
||
deps = concatLists (map deviceDependency v.interfaces);
|
||
in
|
||
{ description = "Bridge Interface ${n}";
|
||
wantedBy = [ "network-setup.service" (subsystemDevice n) ];
|
||
bindsTo = deps ++ optional v.rstp "mstpd.service";
|
||
partOf = [ "network-setup.service" ] ++ optional v.rstp "mstpd.service";
|
||
after = [ "network-pre.target" ] ++ deps ++ optional v.rstp "mstpd.service"
|
||
++ concatMap (i: [ "network-addresses-${i}.service" "network-link-${i}.service" ]) v.interfaces;
|
||
before = [ "network-setup.service" ];
|
||
serviceConfig.Type = "oneshot";
|
||
serviceConfig.RemainAfterExit = true;
|
||
path = [ pkgs.iproute ];
|
||
script = ''
|
||
# Remove Dead Interfaces
|
||
echo "Removing old bridge ${n}..."
|
||
ip link show "${n}" >/dev/null 2>&1 && ip link del "${n}"
|
||
|
||
echo "Adding bridge ${n}..."
|
||
ip link add name "${n}" type bridge
|
||
|
||
# Enslave child interfaces
|
||
${flip concatMapStrings v.interfaces (i: ''
|
||
ip link set "${i}" master "${n}"
|
||
ip link set "${i}" up
|
||
'')}
|
||
# Save list of enslaved interfaces
|
||
echo "${flip concatMapStrings v.interfaces (i: ''
|
||
${i}
|
||
'')}" > /run/${n}.interfaces
|
||
|
||
# Enable stp on the interface
|
||
${optionalString v.rstp ''
|
||
echo 2 >/sys/class/net/${n}/bridge/stp_state
|
||
''}
|
||
|
||
ip link set "${n}" up
|
||
'';
|
||
postStop = ''
|
||
ip link set "${n}" down || true
|
||
ip link del "${n}" || true
|
||
rm -f /run/${n}.interfaces
|
||
'';
|
||
reload = ''
|
||
# Un-enslave child interfaces (old list of interfaces)
|
||
for interface in `cat /run/${n}.interfaces`; do
|
||
ip link set "$interface" nomaster up
|
||
done
|
||
|
||
# Enslave child interfaces (new list of interfaces)
|
||
${flip concatMapStrings v.interfaces (i: ''
|
||
ip link set "${i}" master "${n}"
|
||
ip link set "${i}" up
|
||
'')}
|
||
# Save list of enslaved interfaces
|
||
echo "${flip concatMapStrings v.interfaces (i: ''
|
||
${i}
|
||
'')}" > /run/${n}.interfaces
|
||
|
||
# (Un-)set stp on the bridge
|
||
echo ${if v.rstp then "2" else "0"} > /sys/class/net/${n}/bridge/stp_state
|
||
'';
|
||
reloadIfChanged = true;
|
||
});
|
||
|
||
createVswitchDevice = n: v: nameValuePair "${n}-netdev"
|
||
(let
|
||
deps = concatLists (map deviceDependency v.interfaces);
|
||
ofRules = pkgs.writeText "vswitch-${n}-openFlowRules" v.openFlowRules;
|
||
in
|
||
{ description = "Open vSwitch Interface ${n}";
|
||
wantedBy = [ "network-setup.service" "vswitchd.service" ] ++ deps;
|
||
bindsTo = [ "vswitchd.service" (subsystemDevice n) ] ++ deps;
|
||
partOf = [ "network-setup.service" "vswitchd.service" ];
|
||
after = [ "network-pre.target" "vswitchd.service" ] ++ deps;
|
||
before = [ "network-setup.service" ];
|
||
serviceConfig.Type = "oneshot";
|
||
serviceConfig.RemainAfterExit = true;
|
||
path = [ pkgs.iproute config.virtualisation.vswitch.package ];
|
||
script = ''
|
||
echo "Removing old Open vSwitch ${n}..."
|
||
ovs-vsctl --if-exists del-br ${n}
|
||
|
||
echo "Adding Open vSwitch ${n}..."
|
||
ovs-vsctl -- add-br ${n} ${concatMapStrings (i: " -- add-port ${n} ${i}") 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 add-flows ${n} ${ofRules}
|
||
'';
|
||
postStop = ''
|
||
ip link set ${n} down || true
|
||
ovs-ofctl del-flows ${n} || true
|
||
ovs-vsctl --if-exists del-br ${n}
|
||
'';
|
||
});
|
||
|
||
createBondDevice = n: v: nameValuePair "${n}-netdev"
|
||
(let
|
||
deps = concatLists (map deviceDependency v.interfaces);
|
||
in
|
||
{ description = "Bond Interface ${n}";
|
||
wantedBy = [ "network-setup.service" (subsystemDevice n) ];
|
||
bindsTo = deps;
|
||
partOf = [ "network-setup.service" ];
|
||
after = [ "network-pre.target" ] ++ deps
|
||
++ concatMap (i: [ "network-addresses-${i}.service" "network-link-${i}.service" ]) v.interfaces;
|
||
before = [ "network-setup.service" ];
|
||
serviceConfig.Type = "oneshot";
|
||
serviceConfig.RemainAfterExit = true;
|
||
path = [ pkgs.iproute pkgs.gawk ];
|
||
script = ''
|
||
echo "Destroying old bond ${n}..."
|
||
${destroyBond n}
|
||
|
||
echo "Creating new bond ${n}..."
|
||
ip link add name "${n}" type bond \
|
||
${let opts = (mapAttrs (const toString)
|
||
(bondDeprecation.filterDeprecated v))
|
||
// v.driverOptions;
|
||
in concatStringsSep "\n"
|
||
(mapAttrsToList (set: val: " ${set} ${val} \\") opts)}
|
||
|
||
# !!! There must be a better way to wait for the interface
|
||
while [ ! -d "/sys/class/net/${n}" ]; do sleep 0.1; done;
|
||
|
||
# Bring up the bond and enslave the specified interfaces
|
||
ip link set "${n}" up
|
||
${flip concatMapStrings v.interfaces (i: ''
|
||
ip link set "${i}" down
|
||
ip link set "${i}" master "${n}"
|
||
'')}
|
||
'';
|
||
postStop = destroyBond n;
|
||
});
|
||
|
||
createMacvlanDevice = n: v: nameValuePair "${n}-netdev"
|
||
(let
|
||
deps = deviceDependency v.interface;
|
||
in
|
||
{ description = "Vlan Interface ${n}";
|
||
wantedBy = [ "network-setup.service" (subsystemDevice n) ];
|
||
bindsTo = deps;
|
||
partOf = [ "network-setup.service" ];
|
||
after = [ "network-pre.target" ] ++ deps;
|
||
before = [ "network-setup.service" ];
|
||
serviceConfig.Type = "oneshot";
|
||
serviceConfig.RemainAfterExit = true;
|
||
path = [ pkgs.iproute ];
|
||
script = ''
|
||
# Remove Dead Interfaces
|
||
ip link show "${n}" >/dev/null 2>&1 && ip link delete "${n}"
|
||
ip link add link "${v.interface}" name "${n}" type macvlan \
|
||
${optionalString (v.mode != null) "mode ${v.mode}"}
|
||
ip link set "${n}" up
|
||
'';
|
||
postStop = ''
|
||
ip link delete "${n}" || true
|
||
'';
|
||
});
|
||
|
||
createSitDevice = n: v: nameValuePair "${n}-netdev"
|
||
(let
|
||
deps = deviceDependency v.dev;
|
||
in
|
||
{ description = "6-to-4 Tunnel Interface ${n}";
|
||
wantedBy = [ "network-setup.service" (subsystemDevice n) ];
|
||
bindsTo = deps;
|
||
partOf = [ "network-setup.service" ];
|
||
after = [ "network-pre.target" ] ++ deps;
|
||
before = [ "network-setup.service" ];
|
||
serviceConfig.Type = "oneshot";
|
||
serviceConfig.RemainAfterExit = true;
|
||
path = [ pkgs.iproute ];
|
||
script = ''
|
||
# Remove Dead Interfaces
|
||
ip link show "${n}" >/dev/null 2>&1 && ip link delete "${n}"
|
||
ip link add name "${n}" type sit \
|
||
${optionalString (v.remote != null) "remote \"${v.remote}\""} \
|
||
${optionalString (v.local != null) "local \"${v.local}\""} \
|
||
${optionalString (v.ttl != null) "ttl ${toString v.ttl}"} \
|
||
${optionalString (v.dev != null) "dev \"${v.dev}\""}
|
||
ip link set "${n}" up
|
||
'';
|
||
postStop = ''
|
||
ip link delete "${n}" || true
|
||
'';
|
||
});
|
||
|
||
createVlanDevice = n: v: nameValuePair "${n}-netdev"
|
||
(let
|
||
deps = deviceDependency v.interface;
|
||
in
|
||
{ description = "Vlan Interface ${n}";
|
||
wantedBy = [ "network-setup.service" (subsystemDevice n) ];
|
||
bindsTo = deps;
|
||
partOf = [ "network-setup.service" ];
|
||
after = [ "network-pre.target" ] ++ deps;
|
||
before = [ "network-setup.service" ];
|
||
serviceConfig.Type = "oneshot";
|
||
serviceConfig.RemainAfterExit = true;
|
||
path = [ pkgs.iproute ];
|
||
script = ''
|
||
# Remove Dead Interfaces
|
||
ip link show "${n}" >/dev/null 2>&1 && ip link delete "${n}"
|
||
ip link add link "${v.interface}" name "${n}" type vlan id "${toString v.id}"
|
||
ip link set "${n}" up
|
||
'';
|
||
postStop = ''
|
||
ip link delete "${n}" || true
|
||
'';
|
||
});
|
||
|
||
in listToAttrs (
|
||
map configureAddrs interfaces ++
|
||
map createTunDevice (filter (i: i.virtual) interfaces))
|
||
// mapAttrs' createBridgeDevice cfg.bridges
|
||
// mapAttrs' createVswitchDevice cfg.vswitches
|
||
// mapAttrs' createBondDevice cfg.bonds
|
||
// mapAttrs' createMacvlanDevice cfg.macvlans
|
||
// mapAttrs' createSitDevice cfg.sits
|
||
// mapAttrs' createVlanDevice cfg.vlans
|
||
// {
|
||
"network-setup" = networkSetup;
|
||
"network-local-commands" = networkLocalCommands;
|
||
};
|
||
|
||
services.udev.extraRules =
|
||
''
|
||
KERNEL=="tun", TAG+="systemd"
|
||
'';
|
||
|
||
|
||
};
|
||
|
||
in
|
||
|
||
{
|
||
config = mkMerge [
|
||
bondWarnings
|
||
(mkIf (!cfg.useNetworkd) normalConfig)
|
||
{ # Ensure slave interfaces are brought up
|
||
networking.interfaces = genAttrs slaves (i: {});
|
||
}
|
||
];
|
||
}
|