// 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(tenantName) if err != nil { log.Errorf("error reading tenant cfg state. Error: %s", err) return err } tempRm, err := resources.GetStateResourceManager() if err != nil { return err } rm := core.ResourceManager(tempRm) // 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) // construct and update network state nwCfg = &mastercfg.CfgNetworkState{ Tenant: tenantName, NetworkName: network.Name, PktTagType: network.PktTagType, SubnetIP: subnetIP, SubnetLen: subnetLen, Gateway: network.Gateway, } nwCfg.ID = networkID nwCfg.StateDriver = stateDriver if network.PktTagType == "" { nwCfg.PktTagType = gCfg.Deploy.DefaultNetType } if network.PktTag == 0 { if nwCfg.PktTagType == "vlan" { pktTag, err = gCfg.AllocVLAN(rm) if err != nil { return err } } else if nwCfg.PktTagType == "vxlan" { extPktTag, pktTag, err = gCfg.AllocVXLAN(rm) if err != nil { return err } } nwCfg.ExtPktTag = int(extPktTag) nwCfg.PktTag = int(pktTag) } else if network.PktTagType == "vxlan" { if !isTagInRange(uint(network.PktTag), "vxlan", gCfg.Auto.VXLANs, stateDriver, tenantName) { return fmt.Errorf("vxlan %d does not adhere to tenant's vxlan range %s", network.PktTag, gCfg.Auto.VXLANs) } nwCfg.ExtPktTag = network.PktTag nwCfg.PktTag = network.PktTag } else if network.PktTagType == "vlan" { if !isTagInRange(uint(network.PktTag), "vlan", gCfg.Auto.VLANs, stateDriver, tenantName) { return fmt.Errorf("vlan %d does not adhere to tenant's vlan range %s", network.PktTag, gCfg.Auto.VLANs) } nwCfg.PktTag = network.PktTag } if nwCfg.SubnetIP == "" { nwCfg.SubnetLen = gCfg.Auto.AllocSubnetLen nwCfg.SubnetIP, err = gCfg.AllocSubnet(rm) if err != nil { return err } nwCfg.SubnetIsAllocated = true } defaultNwName, err := gCfg.AssignDefaultNetwork(network.Name) if err != nil { log.Errorf("error assigning the default network. Error: %s", err) return err } if network.Name == defaultNwName { // For auto derived subnets assign gateway ip be the last valid unicast ip the subnet if nwCfg.Gateway == "" && nwCfg.SubnetIsAllocated { var ipAddrValue uint ipAddrValue = (1 << (32 - nwCfg.SubnetLen)) - 2 nwCfg.Gateway, err = netutils.GetSubnetIP(nwCfg.SubnetIP, nwCfg.SubnetLen, 32, ipAddrValue) if err != nil { return err } nwCfg.IPAllocMap.Set(ipAddrValue) } } netutils.InitSubnetBitset(&nwCfg.IPAllocMap, nwCfg.SubnetLen) err = nwCfg.Write() if err != nil { return err } if GetClusterMode() == "docker" { // Create the network in docker subnetCIDR := fmt.Sprintf("%s/%d", nwCfg.SubnetIP, nwCfg.SubnetLen) err = createDockNet(tenantName, network.Name, "", subnetCIDR, nwCfg.Gateway) if err != nil { log.Errorf("Error creating network %s in docker. Err: %v", nwCfg.ID, err) return err } // 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 }