func SetMtu(name string, mtu int) error {
iface, err := net.InterfaceByName(name)
if err != nil {
return err
}
return netlink.NetworkSetMTU(iface, mtu)
}
// Setup networking
func setupNetworking(args *execdriver.InitArgs) error {
if args.Ip != "" {
// eth0
iface, err := net.InterfaceByName("eth0")
if err != nil {
return fmt.Errorf("Unable to set up networking: %v", err)
}
ip, ipNet, err := net.ParseCIDR(args.Ip)
if err != nil {
return fmt.Errorf("Unable to set up networking: %v", err)
}
if err := netlink.NetworkLinkAddIp(iface, ip, ipNet); err != nil {
return fmt.Errorf("Unable to set up networking: %v", err)
}
if err := netlink.NetworkSetMTU(iface, args.Mtu); err != nil {
return fmt.Errorf("Unable to set MTU: %v", err)
}
if err := netlink.NetworkLinkUp(iface); err != nil {
return fmt.Errorf("Unable to set up networking: %v", err)
}
// loopback
iface, err = net.InterfaceByName("lo")
if err != nil {
return fmt.Errorf("Unable to set up networking: %v", err)
}
if err := netlink.NetworkLinkUp(iface); err != nil {
return fmt.Errorf("Unable to set up networking: %v", err)
}
}
if args.Gateway != "" {
gw := net.ParseIP(args.Gateway)
if gw == nil {
return fmt.Errorf("Unable to set up networking, %s is not a valid gateway IP", args.Gateway)
}
if err := netlink.AddDefaultGw(gw.String(), "eth0"); err != nil {
return fmt.Errorf("Unable to set up networking: %v", err)
}
}
return nil
}