95 lines
2.6 KiB
Go
95 lines
2.6 KiB
Go
// Copyright 2015 CoreOS, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package system
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import (
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"log"
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"net"
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"os/exec"
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"strings"
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"github.com/vishvananda/netlink"
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"github.com/coreos/coreos-cloudinit/config"
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"github.com/coreos/coreos-cloudinit/network"
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)
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func RestartNetwork(interfaces []network.InterfaceGenerator) (err error) {
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defer func() {
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if e := restartNetworkd(); e != nil {
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err = e
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}
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}()
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if err = downNetworkInterfaces(interfaces); err != nil {
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return
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}
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if err = maybeProbe8012q(interfaces); err != nil {
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return
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}
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return maybeProbeBonding(interfaces)
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}
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func downNetworkInterfaces(interfaces []network.InterfaceGenerator) error {
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sysInterfaceMap := make(map[string]*net.Interface)
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if systemInterfaces, err := net.Interfaces(); err == nil {
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for _, iface := range systemInterfaces {
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iface := iface
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sysInterfaceMap[iface.Name] = &iface
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}
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} else {
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return err
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}
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for _, iface := range interfaces {
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if systemInterface, ok := sysInterfaceMap[iface.Name()]; ok {
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log.Printf("Taking down interface %q\n", systemInterface.Name)
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if err := netlink.NetworkLinkDown(systemInterface); err != nil {
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log.Printf("Error while downing interface %q (%s). Continuing...\n", systemInterface.Name, err)
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}
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}
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}
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return nil
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}
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func maybeProbe8012q(interfaces []network.InterfaceGenerator) error {
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for _, iface := range interfaces {
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if iface.Type() == "vlan" {
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log.Printf("Probing LKM %q (%q)\n", "8021q", "8021q")
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return exec.Command("modprobe", "8021q").Run()
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}
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}
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return nil
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}
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func maybeProbeBonding(interfaces []network.InterfaceGenerator) error {
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for _, iface := range interfaces {
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if iface.Type() == "bond" {
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args := append([]string{"bonding"}, strings.Split(iface.ModprobeParams(), " ")...)
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log.Printf("Probing LKM %q (%q)\n", "bonding", args)
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return exec.Command("modprobe", args...).Run()
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}
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}
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return nil
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}
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func restartNetworkd() error {
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log.Printf("Restarting networkd.service\n")
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networkd := Unit{config.Unit{Name: "systemd-networkd.service"}}
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_, err := NewUnitManager("").RunUnitCommand(networkd, "restart")
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return err
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}
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