Example #1
0
func SetMtu(name string, mtu int) error {
	iface, err := net.InterfaceByName(name)
	if err != nil {
		return err
	}
	return netlink.NetworkSetMTU(iface, mtu)
}
Example #2
0
// 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); err != nil {
			return fmt.Errorf("Unable to set up networking: %v", err)
		}
	}

	return nil
}