// 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
}
// processResource handles resource commands
func processResource(stateDriver core.StateDriver, rsrcName, rsrcVal string) error {
// Read global config
gCfg := gstate.Cfg{}
gCfg.StateDriver = stateDriver
err := gCfg.Read("")
if err != nil {
log.Errorf("error reading tenant cfg state. Error: %s", err)
return err
}
// process resource based on name
if rsrcName == "vlan" {
numVlans, vlansInUse := gCfg.GetVlansInUse()
fmt.Printf("Num Vlans: %d\n Current Vlans in Use: %s\n", numVlans, vlansInUse)
// see if we need to set the resource
if rsrcVal != "" {
values, err := parseRange(rsrcVal)
if err != nil {
log.Errorf("Error parsing range: %v", err)
return err
}
log.Infof("Setting vlan values: %v", values)
// set vlan values
for _, val := range values {
_, err = gCfg.AllocVLAN(val)
if err != nil {
log.Errorf("Error setting vlan: %d. Err: %v", val, err)
}
}
log.Infof("Finished setting VLANs")
}
} else if rsrcName == "vxlan" {
numVxlans, vxlansInUse := gCfg.GetVxlansInUse()
fmt.Printf("Num Vxlans: %d\n Current Vxlans in Use: %s\n", numVxlans, vxlansInUse)
// see if we need to set the resource
if rsrcVal != "" {
values, err := parseRange(rsrcVal)
if err != nil {
log.Errorf("Error parsing range: %v", err)
return err
}
log.Infof("Setting vxlan values: %v", values)
// set vlan values
for _, val := range values {
_, _, err = gCfg.AllocVXLAN(val)
if err != nil {
log.Errorf("Error setting vxlan: %d. Err: %v", val, err)
}
}
log.Infof("Finished setting VXLANs")
}
} else {
log.Errorf("Unknown resource: %v", rsrcName)
return fmt.Errorf("Unknown resource")
}
return nil
}
// 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)
// 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
// 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)
// Reserve gateway IP address
ipAddrValue, err := netutils.GetIPNumber(nwCfg.SubnetIP, 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)
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
}