// 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
nwCfg := &drivers.OvsCfgNetworkState{}
nwCfg.StateDriver = stateDriver
if nwCfg.Read(network.Name) == nil {
// TODO: check if parameters changed and apply an update if needed
return nil
}
// construct and update network state
nwMasterCfg := &NwConfig{}
nwMasterCfg.StateDriver = stateDriver
nwMasterCfg.Tenant = tenantName
nwMasterCfg.ID = network.Name
nwMasterCfg.PktTagType = network.PktTagType
nwMasterCfg.PktTag = network.PktTag
nwMasterCfg.SubnetIP, nwMasterCfg.SubnetLen, _ = netutils.ParseCIDR(network.SubnetCIDR)
nwMasterCfg.DefaultGw = network.DefaultGw
nwCfg = &drivers.OvsCfgNetworkState{
Tenant: nwMasterCfg.Tenant,
PktTagType: nwMasterCfg.PktTagType,
SubnetIP: nwMasterCfg.SubnetIP,
SubnetLen: nwMasterCfg.SubnetLen,
}
nwCfg.StateDriver = stateDriver
nwCfg.ID = nwMasterCfg.ID
if nwMasterCfg.PktTagType == "" {
nwCfg.PktTagType = gCfg.Deploy.DefaultNetType
}
if nwMasterCfg.PktTag == "" {
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 nwMasterCfg.PktTagType == "vxlan" {
// XXX: take local vlan as config, instead of allocating it
// independently. Return erro for now, if user tries this config
return core.Errorf("Not handled. Need to introduce local-vlan config")
} else if nwMasterCfg.PktTagType == "vlan" {
nwCfg.PktTag, _ = strconv.Atoi(nwMasterCfg.PktTag)
// XXX: do configuration check, to make sure it is allowed
}
if nwCfg.SubnetIP == "" {
nwCfg.SubnetLen = gCfg.Auto.AllocSubnetLen
nwCfg.SubnetIP, err = gCfg.AllocSubnet(rm)
if err != nil {
return err
}
}
nwCfg.DefaultGw = network.DefaultGw
if nwCfg.DefaultGw == "" {
// TBD: allocate per global policy
}
netutils.InitSubnetBitset(&nwCfg.IPAllocMap, nwCfg.SubnetLen)
err = nwCfg.Write()
if err != nil {
return err
}
err = nwMasterCfg.Write()
if err != nil {
log.Errorf("error writing nw config. Error: %s", err)
return err
}
if nwCfg.PktTagType == "vxlan" {
readHost := &HostConfig{}
readHost.StateDriver = stateDriver
hostCfgs, err := readHost.ReadAll()
if err != nil {
if !strings.Contains(err.Error(), "Key not found") {
log.Errorf("error reading hosts during net add. Error: %s", err)
}
}
for _, hostCfg := range hostCfgs {
host := hostCfg.(*HostConfig)
err = createVtep(stateDriver, host, nwCfg.ID)
if err != nil {
log.Errorf("error creating vtep. Error: %s", err)
}
}
}
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(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" {
nwCfg.ExtPktTag = network.PktTag
nwCfg.PktTag = network.PktTag
} else if network.PktTagType == "vlan" {
nwCfg.PktTag = network.PktTag
// XXX: do configuration check, to make sure it is allowed
}
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
}
// Create the network in docker
subnetCIDR := fmt.Sprintf("%s/%d", nwCfg.SubnetIP, nwCfg.SubnetLen)
err = createDockNet(nwCfg.ID, 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, networkID, stateDriver)
if err != nil {
log.Errorf("Error attaching service container to network: %s. Err: %v",
networkID, err)
}
return nil
}