Golang SetInterfaceIP Examples

Example #1

File: netd.go Project: karamsivia/netplugin

// Process Infra Nw Create
// Auto allocate an endpoint for this node
func processInfraNwCreate(netPlugin *plugin.NetPlugin, nwCfg *mastercfg.CfgNetworkState, opts cliOpts) (err error) {
	pluginHost := opts.hostLabel

	// Build endpoint request
	mreq := master.CreateEndpointRequest{
		TenantName:  nwCfg.Tenant,
		NetworkName: nwCfg.NetworkName,
		EndpointID:  pluginHost,
		ConfigEP: intent.ConfigEP{
			Container: pluginHost,
			Host:      pluginHost,
		},
	}

	var mresp master.CreateEndpointResponse
	err = cluster.MasterPostReq("/plugin/createEndpoint", &mreq, &mresp)
	if err != nil {
		log.Errorf("master failed to create endpoint %s", err)
		return err
	}

	log.Infof("Got endpoint create resp from master: %+v", mresp)

	// Take lock to ensure netPlugin processes only one cmd at a time
	netPlugin.Lock()
	defer func() { netPlugin.Unlock() }()

	// Ask netplugin to create the endpoint
	netID := nwCfg.NetworkName + "." + nwCfg.Tenant
	err = netPlugin.CreateEndpoint(netID + "-" + pluginHost)
	if err != nil {
		log.Errorf("Endpoint creation failed. Error: %s", err)
		return err
	}

	// Assign IP to interface
	ipCIDR := fmt.Sprintf("%s/%d", mresp.EndpointConfig.IPAddress, nwCfg.SubnetLen)
	err = netutils.SetInterfaceIP(nwCfg.NetworkName, ipCIDR)
	if err != nil {
		log.Errorf("Could not assign ip: %s", err)
		return err
	}

	return nil
}

Example #2

File: ovsSwitch.go Project: abhinandanpb/netplugin

// AddHostPort adds a host port to the OVS
func (sw *OvsSwitch) AddHostPort(intfName string, intfNum int, isHostNS bool) error {
	var err error

	// some error checking
	if sw.netType != "host" {
		log.Fatalf("Can not add host port to OVS type %s.", sw.netType)
	}

	if sw.hostBridge == nil {
		log.Fatalf("Cannot add host port -- no host bridge")
	}

	ovsPortType := ""
	ovsPortName := getOvsPortName(intfName, isHostNS)
	if isHostNS {
		ovsPortType = "internal"
	} else {

		// Create a Veth pair
		err := createVethPair(intfName, ovsPortName)
		// Set the OVS side of the port as up
		err = setLinkUp(ovsPortName)
		if err != nil {
			log.Errorf("Error setting link %s up. Err: %v", ovsPortName, err)
			return err
		}
	}

	portID := "host" + intfName

	// If the port already exists in OVS, remove it first
	if sw.ovsdbDriver.IsPortNamePresent(ovsPortName) {
		log.Debugf("Removing existing interface entry %s from OVS", ovsPortName)

		// Delete it from ovsdb
		err := sw.ovsdbDriver.DeletePort(ovsPortName)
		if err != nil {
			log.Errorf("Error deleting port %s from OVS. Err: %v", ovsPortName, err)
		}
	}

	// Ask OVSDB driver to add the port as an access port
	err = sw.ovsdbDriver.CreatePort(ovsPortName, ovsPortType, portID, hostVLAN, 0, 0)
	if err != nil {
		log.Errorf("Error adding hostport %s to OVS. Err: %v", intfName, err)
		return err
	}

	// Get the openflow port number for the interface
	ofpPort, err := sw.ovsdbDriver.GetOfpPortNo(ovsPortName)
	if err != nil {
		log.Errorf("Could not find the OVS port %s. Err: %v", intfName, err)
		return err
	}

	// Assign an IP based on the intfnumber
	ipStr, macStr := netutils.PortToHostIPMAC(intfNum)
	mac, _ := net.ParseMAC(macStr)
	ip := net.ParseIP(ipStr)

	portInfo := ofnet.EndpointInfo{
		PortNo:  ofpPort,
		MacAddr: mac,
		IpAddr:  ip,
	}
	// Add to ofnet if this is the hostNS port.
	netutils.SetInterfaceMac(intfName, macStr)
	netutils.SetInterfaceIP(intfName, ipStr)
	err = setLinkUp(intfName)

	if isHostNS {
		err = sw.hostBridge.AddHostPort(portInfo)
		if err != nil {
			log.Errorf("Error adding host port %s. Err: %v", intfName, err)
			return err
		}

		log.Infof("Added host port %s to OVS switch %s.", intfName, sw.bridgeName)
	}

	defer func() {
		if err != nil {
			sw.ovsdbDriver.DeletePort(intfName)
		}
	}()

	return nil
}