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infoblox-ipam.go
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infoblox-ipam.go
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package main
import (
"errors"
"fmt"
ipamsapi "github.com/docker/libnetwork/ipams/remote/api"
"github.com/docker/libnetwork/netlabel"
ibclient "github.com/infobloxopen/infoblox-go-client"
"log"
"strconv"
"strings"
)
type Container struct {
NetworkContainer string // CIDR of Network Container
ContainerObj *ibclient.NetworkContainer
exhausted bool
}
type InfobloxAddressSpace struct {
NetviewName string // Network View Name
PrefixLength uint // Prefix Length
Containers []Container
}
type AddressSpaceScope int
const (
GLOBAL AddressSpaceScope = iota
LOCAL
)
type InfobloxDriver struct {
objMgr *ibclient.ObjectManager
addressSpaceByScope map[AddressSpaceScope]*InfobloxAddressSpace
addressSpaceByView map[string]*InfobloxAddressSpace
}
func (ibDrv *InfobloxDriver) PluginActivate(r interface{}) (map[string]interface{}, error) {
return map[string]interface{}{
"Implements": []interface{}{
"IpamDriver",
}}, nil
}
func (ibDrv *InfobloxDriver) GetCapabilities(r interface{}) (map[string]interface{}, error) {
return map[string]interface{}{"RequiresMACAddress": true}, nil
}
func (ibDrv *InfobloxDriver) GetDefaultAddressSpaces(r interface{}) (map[string]interface{}, error) {
globalViewRef, localViewRef, err := ibDrv.objMgr.CreateDefaultNetviews(
ibDrv.addressSpaceByScope[GLOBAL].NetviewName,
ibDrv.addressSpaceByScope[LOCAL].NetviewName)
return map[string]interface{}{"GlobalDefaultAddressSpace": globalViewRef, "LocalDefaultAddressSpace": localViewRef}, err
}
func getPrefixLength(cidr string) (prefixLength string) {
parts := strings.Split(cidr, "/")
return parts[1]
}
func (ibDrv *InfobloxDriver) RequestAddress(r interface{}) (map[string]interface{}, error) {
v := r.(*ipamsapi.RequestAddressRequest)
network := ibclient.BuildNetworkFromRef(v.PoolID)
macAddr := v.Options[netlabel.MacAddress]
if len(macAddr) == 0 {
macAddr = ibclient.MACADDR_ZERO
log.Printf("RequestAddressRequest contains empty MAC Address. '%s' will be used.\n", macAddr)
}
fixedAddr, _ := ibDrv.objMgr.GetFixedAddress(network.NetviewName, network.Cidr, "", macAddr)
if fixedAddr != nil {
if v.Address != "" {
if fixedAddr.IPAddress != v.Address {
msg := fmt.Sprintf("Requested MAC '%s' is already associated with a difference IP '%s' (requested: '%s')",
macAddr, fixedAddr.IPAddress, v.Address)
log.Printf("RequestAddress: %s", msg)
return nil, errors.New(msg)
}
}
}
var err error
if fixedAddr == nil {
fixedAddr, err = ibDrv.objMgr.AllocateIP(network.NetviewName, network.Cidr, v.Address, macAddr, "")
}
var res map[string]interface{}
if fixedAddr == nil || err != nil {
res = map[string]interface{}{}
} else {
res = map[string]interface{}{"Address": fmt.Sprintf("%s/%s", fixedAddr.IPAddress, getPrefixLength(network.Cidr))}
}
return res, err
}
func (ibDrv *InfobloxDriver) ReleaseAddress(r interface{}) (map[string]interface{}, error) {
v := r.(*ipamsapi.ReleaseAddressRequest)
log.Printf("Releasing Address '%s' from Pool '%s'\n", v.Address, v.PoolID)
network := ibclient.BuildNetworkFromRef(v.PoolID)
ref, _ := ibDrv.objMgr.ReleaseIP(network.NetviewName, network.Cidr, v.Address, "")
if ref == "" {
log.Printf("***** IP Cannot be deleted '%s'! *******\n", v.Address)
}
return map[string]interface{}{}, nil
}
func (ibDrv *InfobloxDriver) requestSpecificNetwork(netview string, pool string, networkName string) (*ibclient.Network, error) {
network, err := ibDrv.objMgr.GetNetwork(netview, pool, nil)
if err != nil {
return nil, err
}
if network != nil {
if n, ok := network.Ea["Network Name"]; !ok || n != networkName {
msg := fmt.Sprintf("Network (%s) already in use", network.Cidr)
log.Printf("requestSpecificNetwork: %s", msg)
return nil, errors.New(msg)
}
} else {
networkByName, err := ibDrv.objMgr.GetNetwork(netview, "", ibclient.EA{"Network Name": networkName})
if err != nil {
return nil, err
}
if networkByName != nil {
if networkByName.Cidr != pool {
msg := fmt.Sprintf("Network name (%s) has different CIDR (%s)", networkName, networkByName.Cidr)
log.Printf("requestSpecificNetwork: %s", msg)
return nil, errors.New(msg)
}
}
}
if network == nil {
network, err = ibDrv.objMgr.CreateNetwork(netview, pool, networkName)
log.Printf("requestSpecificNetwork: CreateNetwork returns '%s', err='%s'", *network, err)
}
return network, err
}
func (ibDrv *InfobloxDriver) createNetworkContainer(netview string, pool string) (*ibclient.NetworkContainer, error) {
container, err := ibDrv.objMgr.GetNetworkContainer(netview, pool)
if container == nil {
container, err = ibDrv.objMgr.CreateNetworkContainer(netview, pool)
}
return container, err
}
func nextAvailableContainer(addrSpace *InfobloxAddressSpace) *Container {
for i, _ := range addrSpace.Containers {
if !addrSpace.Containers[i].exhausted {
return &addrSpace.Containers[i]
}
}
return nil
}
func resetContainers(addrSpace *InfobloxAddressSpace) {
for i, _ := range addrSpace.Containers {
addrSpace.Containers[i].exhausted = false
}
}
func (ibDrv *InfobloxDriver) allocateNetworkHelper(addrSpace *InfobloxAddressSpace, prefixLen uint, networkName string) (network *ibclient.Network, err error) {
if prefixLen == 0 {
prefixLen = addrSpace.PrefixLength
}
container := nextAvailableContainer(addrSpace)
for container != nil {
log.Printf("Allocating network from Container:'%s'", container.NetworkContainer)
if container.ContainerObj == nil {
var err error
container.ContainerObj, err = ibDrv.createNetworkContainer(addrSpace.NetviewName, container.NetworkContainer)
if err != nil {
return nil, err
}
}
network, err = ibDrv.objMgr.AllocateNetwork(addrSpace.NetviewName, container.NetworkContainer, prefixLen, networkName)
if network != nil {
break
}
container.exhausted = true
container = nextAvailableContainer(addrSpace)
}
return network, nil
}
func (ibDrv *InfobloxDriver) allocateNetwork(netview string, prefixLen uint, networkName string) (network *ibclient.Network, err error) {
addrSpace := ibDrv.addressSpaceByView[netview]
network, err = ibDrv.allocateNetworkHelper(addrSpace, prefixLen, networkName)
if network == nil {
resetContainers(addrSpace)
network, err = ibDrv.allocateNetworkHelper(addrSpace, prefixLen, networkName)
}
if network == nil {
err = errors.New("Cannot allocate network in Address Space")
}
return
}
func (ibDrv *InfobloxDriver) RequestPool(r interface{}) (res map[string]interface{}, err error) {
v := r.(*ipamsapi.RequestPoolRequest)
log.Printf("RequestPoolRequest is '%v'\n", v)
netviewName := ibclient.BuildNetworkViewFromRef(v.AddressSpace).Name
var network *ibclient.Network
var networkName string
if opt, ok := v.Options["network-name"]; ok {
networkName = opt
}
if len(v.Pool) > 0 {
network, err = ibDrv.requestSpecificNetwork(netviewName, v.Pool, networkName)
} else {
var prefixLen uint
var networkByName *ibclient.Network
if networkName != "" {
networkByName, err = ibDrv.objMgr.GetNetwork(netviewName, "", ibclient.EA{"Network Name": networkName})
if err != nil {
return
}
}
if networkByName != nil {
log.Printf("RequestNetwork: GetNetwork by name returns '%s'", *networkByName)
network = networkByName
} else {
if opt, ok := v.Options["prefix-length"]; ok {
if v, err := strconv.ParseUint(opt, 10, 8); err == nil {
prefixLen = uint(v)
}
}
network, err = ibDrv.allocateNetwork(netviewName, prefixLen, networkName)
}
}
if network != nil {
res = map[string]interface{}{"PoolID": network.Ref, "Pool": network.Cidr}
}
return
}
func (ibDrv *InfobloxDriver) ReleasePool(r interface{}) (map[string]interface{}, error) {
v := r.(*ipamsapi.ReleasePoolRequest)
if len(v.PoolID) > 0 {
networkFromRef := ibclient.BuildNetworkFromRef(v.PoolID)
network, err := ibDrv.objMgr.GetNetwork(networkFromRef.NetviewName, networkFromRef.Cidr, nil)
if err != nil {
return map[string]interface{}{}, err
}
// if network has a valid looking "Network Name" EA, assume that
// it is shared with others - hence not deleted.
if n, ok := network.Ea["Network Name"]; ok && n != "" {
return map[string]interface{}{}, nil
}
ref, _ := ibDrv.objMgr.DeleteNetwork(v.PoolID, networkFromRef.NetviewName)
if len(ref) > 0 {
log.Printf("Network %s successfully deleted from Infoblox\n", v.PoolID)
}
}
return map[string]interface{}{}, nil
}
func makeContainers(containerList string) []Container {
var containers []Container
parts := strings.Split(containerList, ",")
for _, p := range parts {
containers = append(containers, Container{p, nil, false})
}
return containers
}
func NewInfobloxDriver(objMgr *ibclient.ObjectManager,
globalNetview string, globalNetworkContainer string, globalPrefixLength uint,
localNetview string, localNetworkContainer string, localPrefixLength uint) *InfobloxDriver {
globalContainers := makeContainers(globalNetworkContainer)
localContainers := makeContainers(localNetworkContainer)
globalAddressSpace := &InfobloxAddressSpace{
globalNetview, globalPrefixLength, globalContainers}
localAddressSpace := &InfobloxAddressSpace{
localNetview, localPrefixLength, localContainers}
return &InfobloxDriver{
objMgr: objMgr,
addressSpaceByScope: map[AddressSpaceScope]*InfobloxAddressSpace{
GLOBAL: globalAddressSpace,
LOCAL: localAddressSpace,
},
addressSpaceByView: map[string]*InfobloxAddressSpace{
globalNetview: globalAddressSpace,
localNetview: localAddressSpace,
},
}
}