// 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
}
