Ejemplo n.º 1
0
//Random Key updates
func keyUpdates(key string) {
	valArray, _, _ := ecc.Get("network", key)
	currVal := make([]byte, len(valArray))
	copy(currVal, valArray)
	valArray = []byte("value1")
	ecc.Put("network", key, valArray, currVal)
	time.Sleep(time.Second * 2)
	updArray := []byte("value2")
	ecc.Put("network", key, updArray, valArray)
	time.Sleep(time.Second * 2)
}
Ejemplo n.º 2
0
func releaseVlan(vlan uint) {
	vlanArray, _, ok := ecc.Get(vlanStore, "vlan")
	currVal := make([]byte, vlanCount/8)
	copy(currVal, vlanArray)
	if !ok {
		vlanArray = make([]byte, vlanCount/8)
	}
	clearBit(vlanArray, vlan-1)
	eccerr := ecc.Put(vlanStore, "vlan", vlanArray, currVal)
	if eccerr == ecc.OUTDATED {
		releaseVlan(vlan)
	}
}
Ejemplo n.º 3
0
func IPAMRelease(address net.IP, subnet net.IPNet) bool {
	addrArray, _, ok := ecc.Get(dataStore, subnet.String())
	currVal := make([]byte, len(addrArray))
	copy(currVal, addrArray)
	if !ok {
		return false
	}
	pos := getBitPosition(address, subnet)
	clearBit(addrArray, pos-1)
	eccerr := ecc.Put(dataStore, subnet.String(), addrArray, currVal)
	if eccerr == ecc.OUTDATED {
		return IPAMRelease(address, subnet)
	}
	return true
}
Ejemplo n.º 4
0
func allocateVlan() (uint, error) {
	vlanArray, _, ok := ecc.Get(vlanStore, "vlan")
	currVal := make([]byte, vlanCount/8)
	copy(currVal, vlanArray)
	if !ok {
		vlanArray = make([]byte, vlanCount/8)
	}
	vlan := testAndSetBit(vlanArray)
	if vlan >= vlanCount {
		return vlanCount, errors.New("Vlan unavailable")
	}
	eccerr := ecc.Put(vlanStore, "vlan", vlanArray, currVal)
	if eccerr == ecc.OUTDATED {
		return allocateVlan()
	}
	return vlan, nil
}
Ejemplo n.º 5
0
func IPAMRequest(subnet net.IPNet) net.IP {
	bits := bitCount(subnet)
	bc := int(bits / 8)
	partial := int(math.Mod(bits, float64(8)))

	if partial != 0 {
		bc += 1
	}
	addrArray, _, ok := ecc.Get(dataStore, subnet.String())
	currVal := make([]byte, len(addrArray))
	copy(currVal, addrArray)
	if !ok {
		addrArray = make([]byte, bc)
	}
	pos := testAndSetBit(addrArray)
	eccerr := ecc.Put(dataStore, subnet.String(), addrArray, currVal)
	if eccerr == ecc.OUTDATED {
		return IPAMRequest(subnet)
	}
	return getIP(subnet, pos)
}
Ejemplo n.º 6
0
func CreateNetwork(id string, subnet *net.IPNet) (*Network, error) {
	network, err := GetNetwork(id)
	if err == nil {
		log.Debugf("Network '%s' found", id)
		return network, nil
	}

	vlan, err := allocateVlan()
	if err != nil {
		log.Debugf("Unable to allocate VLAN for Network '%s'. Error: %v", id, err.Error())
		return nil, err
	}

	var gateway net.IP

	addr, err := GetIfaceAddr(id)
	if err != nil {
		log.Debugf("Interface with name %s does not exist. Creating it.", id)
		if ovs == nil {
			return nil, errors.New("OVS not connected")
		}
		// Interface does not exist, use the generated subnet
		gateway = IPAMRequest(*subnet)
		network = &Network{id, subnet.String(), gateway.String(), vlan}
		if err = AddInternalPort(ovs, defaultBridgeName, network.ID, vlan); err != nil {
			return network, err
		}
		// TODO : Lame. Remove the sleep. This is required now to keep netlink happy
		// in the next step to find the created interface.
		time.Sleep(time.Second * 1)

		gatewayNet := &net.IPNet{gateway, subnet.Mask}

		log.Debugf("Setting address %s on %s", gatewayNet.String(), network.ID)

		if err = SetMtu(network.ID, mtu); err != nil {
			return network, err
		}
		if err = SetInterfaceIp(network.ID, gatewayNet.String()); err != nil {
			return network, err
		}
		if err = InterfaceUp(network.ID); err != nil {
			return network, err
		}
	} else {
		log.Debugf("Interface with name %s already exists", id)
		ifaceAddr := addr.String()
		gateway, subnet, err = net.ParseCIDR(ifaceAddr)
		if err != nil {
			return nil, err
		}
		network = &Network{id, subnet.String(), gateway.String(), vlan}
	}

	data, err := json.Marshal(network)
	if err != nil {
		return nil, err
	}

	eccerr := ecc.Put(networkStore, id, data, nil)
	if eccerr == ecc.OUTDATED {
		releaseVlan(vlan)
		IPAMRelease(gateway, *subnet)
		return CreateNetwork(id, subnet)
	}

	if err = setupIPTables(network.ID, network.Subnet); err != nil {
		return network, err
	}

	return network, nil
}