Example #1
0
// CreateNetwork creates a network from intent
func CreateNetwork(network intent.ConfigNetwork, stateDriver core.StateDriver, tenantName string) error {
	var extPktTag, pktTag uint

	gCfg := gstate.Cfg{}
	gCfg.StateDriver = stateDriver
	err := gCfg.Read("")
	if err != nil {
		log.Errorf("error reading tenant cfg state. Error: %s", err)
		return err
	}

	// Create network state
	networkID := network.Name + "." + tenantName
	nwCfg := &mastercfg.CfgNetworkState{}
	nwCfg.StateDriver = stateDriver
	if nwCfg.Read(networkID) == nil {
		// TODO: check if parameters changed and apply an update if needed
		return nil
	}

	subnetIP, subnetLen, _ := netutils.ParseCIDR(network.SubnetCIDR)
	err = netutils.ValidateNetworkRangeParams(subnetIP, subnetLen)
	if err != nil {
		return err
	}

	ipv6Subnet, ipv6SubnetLen, _ := netutils.ParseCIDR(network.IPv6SubnetCIDR)

	// construct and update network state
	nwCfg = &mastercfg.CfgNetworkState{
		Tenant:        tenantName,
		NetworkName:   network.Name,
		NwType:        network.NwType,
		PktTagType:    network.PktTagType,
		SubnetIP:      subnetIP,
		SubnetLen:     subnetLen,
		IPv6Subnet:    ipv6Subnet,
		IPv6SubnetLen: ipv6SubnetLen,
	}

	nwCfg.ID = networkID
	nwCfg.StateDriver = stateDriver

	// Allocate pkt tags
	reqPktTag := uint(network.PktTag)
	if nwCfg.PktTagType == "vlan" {
		pktTag, err = gCfg.AllocVLAN(reqPktTag)
		if err != nil {
			return err
		}
	} else if nwCfg.PktTagType == "vxlan" {
		extPktTag, pktTag, err = gCfg.AllocVXLAN(reqPktTag)
		if err != nil {
			return err
		}
	}

	nwCfg.ExtPktTag = int(extPktTag)
	nwCfg.PktTag = int(pktTag)

	netutils.InitSubnetBitset(&nwCfg.IPAllocMap, nwCfg.SubnetLen)
	subnetAddr := netutils.GetSubnetAddr(nwCfg.SubnetIP, nwCfg.SubnetLen)
	nwCfg.SubnetIP = subnetAddr
	nwCfg.IPAddrRange = netutils.GetIPAddrRange(subnetIP, subnetLen)

	if network.Gateway != "" {
		nwCfg.Gateway = network.Gateway

		// Reserve gateway IP address if gateway is specified
		ipAddrValue, err := netutils.GetIPNumber(subnetAddr, nwCfg.SubnetLen, 32, nwCfg.Gateway)
		if err != nil {
			log.Errorf("Error parsing gateway address %s. Err: %v", nwCfg.Gateway, err)
			return err
		}
		nwCfg.IPAllocMap.Set(ipAddrValue)
	}

	if strings.Contains(subnetIP, "-") {
		netutils.SetBitsOutsideRange(&nwCfg.IPAllocMap, subnetIP, subnetLen)
	}

	if network.IPv6Gateway != "" {
		nwCfg.IPv6Gateway = network.IPv6Gateway

		// Reserve gateway IPv6 address if gateway is specified
		hostID, err := netutils.GetIPv6HostID(nwCfg.IPv6Subnet, nwCfg.IPv6SubnetLen, nwCfg.IPv6Gateway)
		if err != nil {
			log.Errorf("Error parsing gateway address %s. Err: %v", nwCfg.IPv6Gateway, err)
			return err
		}
		netutils.ReserveIPv6HostID(hostID, &nwCfg.IPv6AllocMap)
	}

	err = nwCfg.Write()
	if err != nil {
		return err
	}

	// Skip docker and service container configs for infra nw
	if network.NwType == "infra" {
		return nil
	}

	aci, _ := IsAciConfigured()
	if aci {
		// Skip docker network creation for ACI fabric mode.
		return nil
	}

	if GetClusterMode() == "docker" {
		// Create the network in docker
		err = docknet.CreateDockNet(tenantName, network.Name, "", nwCfg)
		if err != nil {
			log.Errorf("Error creating network %s in docker. Err: %v", nwCfg.ID, err)
			return err
		}
	}

	if IsDNSEnabled() {
		// Attach service container endpoint to the network
		err = attachServiceContainer(tenantName, network.Name, stateDriver)
		if err != nil {
			log.Errorf("Error attaching service container to network: %s. Err: %v",
				networkID, err)
			return err
		}
	}

	return nil
}
Example #2
0
// Allocate an address from the network
func networkAllocAddress(nwCfg *mastercfg.CfgNetworkState, reqAddr string, isIPv6 bool) (string, error) {
	var ipAddress string
	var ipAddrValue uint
	var found bool
	var err error
	var hostID string

	// alloc address
	if reqAddr == "" {
		if isIPv6 {
			// Get the next available IPv6 address
			hostID, err = netutils.GetNextIPv6HostID(nwCfg.IPv6LastHost, nwCfg.IPv6Subnet, nwCfg.IPv6SubnetLen, nwCfg.IPv6AllocMap)
			if err != nil {
				log.Errorf("create eps: error allocating ip. Error: %s", err)
				return "", err
			}
			ipAddress, err = netutils.GetSubnetIPv6(nwCfg.IPv6Subnet, nwCfg.IPv6SubnetLen, hostID)
			if err != nil {
				log.Errorf("create eps: error acquiring subnet ip. Error: %s", err)
				return "", err
			}
			nwCfg.IPv6LastHost = hostID
		} else {
			ipAddrValue, found = nwCfg.IPAllocMap.NextClear(0)
			if !found {
				log.Errorf("auto allocation failed - address exhaustion in subnet %s/%d",
					nwCfg.SubnetIP, nwCfg.SubnetLen)
				err = core.Errorf("auto allocation failed - address exhaustion in subnet %s/%d",
					nwCfg.SubnetIP, nwCfg.SubnetLen)
				return "", err
			}
			ipAddress, err = netutils.GetSubnetIP(nwCfg.SubnetIP, nwCfg.SubnetLen, 32, ipAddrValue)
			if err != nil {
				log.Errorf("create eps: error acquiring subnet ip. Error: %s", err)
				return "", err
			}
		}

		// Docker, Mesos issue a Alloc Address first, followed by a CreateEndpoint
		// Kubernetes issues a create endpoint directly
		// since networkAllocAddress is called from both AllocAddressHandler and CreateEndpointHandler,
		// we need to make sure that the EpCount is incremented only when we are allocating
		// a new IP. In case of Docker, Mesos CreateEndPoint will already request a IP that
		// allocateAddress had allocated in the earlier call.
		nwCfg.EpAddrCount++

	} else if reqAddr != "" && nwCfg.SubnetIP != "" {
		if isIPv6 {
			hostID, err = netutils.GetIPv6HostID(nwCfg.IPv6Subnet, nwCfg.IPv6SubnetLen, reqAddr)
			if err != nil {
				log.Errorf("create eps: error getting host id from hostIP %s Subnet %s/%d. Error: %s",
					reqAddr, nwCfg.IPv6Subnet, nwCfg.IPv6SubnetLen, err)
				return "", err
			}
		} else {
			ipAddrValue, err = netutils.GetIPNumber(nwCfg.SubnetIP, nwCfg.SubnetLen, 32, reqAddr)
			if err != nil {
				log.Errorf("create eps: error getting host id from hostIP %s Subnet %s/%d. Error: %s",
					reqAddr, nwCfg.SubnetIP, nwCfg.SubnetLen, err)
				return "", err
			}
		}

		ipAddress = reqAddr
	}

	if isIPv6 {
		netutils.ReserveIPv6HostID(hostID, &nwCfg.IPv6AllocMap)
	} else {
		// Set the bitmap
		nwCfg.IPAllocMap.Set(ipAddrValue)
	}

	err = nwCfg.Write()
	if err != nil {
		log.Errorf("error writing nw config. Error: %s", err)
		return "", err
	}

	return ipAddress, nil
}