d6a0d0908c
In order for networkd to properly configure the network interfaces, the configs must be prefixed to ensure that they load in the correct order (parent interfaces have a lower prefix than their children).
92 lines
2.1 KiB
Go
92 lines
2.1 KiB
Go
package system
|
|
|
|
import (
|
|
"fmt"
|
|
"io/ioutil"
|
|
"net"
|
|
"os/exec"
|
|
"path"
|
|
|
|
"github.com/coreos/coreos-cloudinit/network"
|
|
"github.com/coreos/coreos-cloudinit/third_party/github.com/dotcloud/docker/pkg/netlink"
|
|
)
|
|
|
|
const (
|
|
runtimeNetworkPath = "/run/systemd/network"
|
|
)
|
|
|
|
func RestartNetwork(interfaces []network.InterfaceGenerator) (err error) {
|
|
defer func() {
|
|
if e := restartNetworkd(); e != nil {
|
|
err = e
|
|
}
|
|
}()
|
|
|
|
if err = downNetworkInterfaces(interfaces); err != nil {
|
|
return
|
|
}
|
|
|
|
if err = probe8012q(); err != nil {
|
|
return
|
|
}
|
|
return
|
|
}
|
|
|
|
func downNetworkInterfaces(interfaces []network.InterfaceGenerator) error {
|
|
sysInterfaceMap := make(map[string]*net.Interface)
|
|
if systemInterfaces, err := net.Interfaces(); err == nil {
|
|
for _, iface := range systemInterfaces {
|
|
// Need a copy of the interface so we can take the address
|
|
temp := iface
|
|
sysInterfaceMap[temp.Name] = &temp
|
|
}
|
|
} else {
|
|
return err
|
|
}
|
|
|
|
for _, iface := range interfaces {
|
|
if systemInterface, ok := sysInterfaceMap[iface.Name()]; ok {
|
|
if err := netlink.NetworkLinkDown(systemInterface); err != nil {
|
|
fmt.Printf("Error while downing interface %q (%s). Continuing...\n", systemInterface.Name, err)
|
|
}
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func probe8012q() error {
|
|
return exec.Command("modprobe", "8021q").Run()
|
|
}
|
|
|
|
func restartNetworkd() error {
|
|
_, err := RunUnitCommand("restart", "systemd-networkd.service")
|
|
return err
|
|
}
|
|
|
|
func WriteNetworkdConfigs(interfaces []network.InterfaceGenerator) error {
|
|
for _, iface := range interfaces {
|
|
filename := path.Join(runtimeNetworkPath, fmt.Sprintf("%s.netdev", iface.Filename()))
|
|
if err := writeConfig(filename, iface.Netdev()); err != nil {
|
|
return err
|
|
}
|
|
filename = path.Join(runtimeNetworkPath, fmt.Sprintf("%s.link", iface.Filename()))
|
|
if err := writeConfig(filename, iface.Link()); err != nil {
|
|
return err
|
|
}
|
|
filename = path.Join(runtimeNetworkPath, fmt.Sprintf("%s.network", iface.Filename()))
|
|
if err := writeConfig(filename, iface.Network()); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func writeConfig(filename string, config string) error {
|
|
if config == "" {
|
|
return nil
|
|
}
|
|
|
|
return ioutil.WriteFile(filename, []byte(config), 0444)
|
|
}
|