forked from kubernetes-sigs/external-dns
/
infoblox.go
427 lines (384 loc) · 10.5 KB
/
infoblox.go
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/*
Copyright 2017 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package provider
import (
"os"
"strconv"
"strings"
ibclient "github.com/infobloxopen/infoblox-go-client"
"github.com/kubernetes-incubator/external-dns/endpoint"
"github.com/kubernetes-incubator/external-dns/plan"
"github.com/sirupsen/logrus"
)
// InfobloxConfig clarifies the method signature
type InfobloxConfig struct {
DomainFilter DomainFilter
ZoneIDFilter ZoneIDFilter
Host string
Port int
Username string
Password string
Version string
SSLVerify bool
DryRun bool
}
// InfobloxProvider implements the DNS provider for Infoblox.
type InfobloxProvider struct {
client ibclient.IBConnector
domainFilter DomainFilter
zoneIDFilter ZoneIDFilter
dryRun bool
}
type infobloxRecordSet struct {
obj ibclient.IBObject
res interface{}
}
// NewInfobloxProvider creates a new Infoblox provider.
func NewInfobloxProvider(infobloxConfig InfobloxConfig) (*InfobloxProvider, error) {
hostConfig := ibclient.HostConfig{
Host: infobloxConfig.Host,
Port: strconv.Itoa(infobloxConfig.Port),
Username: infobloxConfig.Username,
Password: infobloxConfig.Password,
Version: infobloxConfig.Version,
}
httpPoolConnections := lookupEnvAtoi("EXTERNAL_DNS_INFOBLOX_HTTP_POOL_CONNECTIONS", 10)
httpRequestTimeout := lookupEnvAtoi("EXTERNAL_DNS_INFOBLOX_HTTP_REQUEST_TIMEOUT", 60)
transportConfig := ibclient.NewTransportConfig(
strconv.FormatBool(infobloxConfig.SSLVerify),
httpRequestTimeout,
httpPoolConnections,
)
requestBuilder := &ibclient.WapiRequestBuilder{}
requestor := &ibclient.WapiHttpRequestor{}
client, err := ibclient.NewConnector(hostConfig, transportConfig, requestBuilder, requestor)
if err != nil {
return nil, err
}
provider := &InfobloxProvider{
client: client,
domainFilter: infobloxConfig.DomainFilter,
zoneIDFilter: infobloxConfig.ZoneIDFilter,
dryRun: infobloxConfig.DryRun,
}
return provider, nil
}
// Records gets the current records.
func (p *InfobloxProvider) Records() (endpoints []*endpoint.Endpoint, err error) {
zones, err := p.zones()
if err != nil {
return nil, err
}
for _, zone := range zones {
var resA []ibclient.RecordA
objA := ibclient.NewRecordA(
ibclient.RecordA{
Zone: zone.Fqdn,
},
)
err = p.client.GetObject(objA, "", &resA)
if err != nil {
return nil, err
}
for _, res := range resA {
endpoints = append(endpoints, endpoint.NewEndpoint(res.Name, endpoint.RecordTypeA, res.Ipv4Addr))
}
// Include Host records since they should be treated synonymously with A records
var resH []ibclient.HostRecord
objH := ibclient.NewHostRecord(
ibclient.HostRecord{
Zone: zone.Fqdn,
},
)
err = p.client.GetObject(objH, "", &resH)
if err != nil {
return nil, err
}
for _, res := range resH {
for _, ip := range res.Ipv4Addrs {
endpoints = append(endpoints, endpoint.NewEndpoint(res.Name, endpoint.RecordTypeA, ip.Ipv4Addr))
}
}
var resC []ibclient.RecordCNAME
objC := ibclient.NewRecordCNAME(
ibclient.RecordCNAME{
Zone: zone.Fqdn,
},
)
err = p.client.GetObject(objC, "", &resC)
if err != nil {
return nil, err
}
for _, res := range resC {
endpoints = append(endpoints, endpoint.NewEndpoint(res.Name, endpoint.RecordTypeCNAME, res.Canonical))
}
var resT []ibclient.RecordTXT
objT := ibclient.NewRecordTXT(
ibclient.RecordTXT{
Zone: zone.Fqdn,
},
)
err = p.client.GetObject(objT, "", &resT)
if err != nil {
return nil, err
}
for _, res := range resT {
// The Infoblox API strips enclosing double quotes from TXT records lacking whitespace.
// Unhandled, the missing double quotes would break the extractOwnerID method of the registry package.
if _, err := strconv.Unquote(res.Text); err != nil {
res.Text = strconv.Quote(res.Text)
}
endpoints = append(endpoints, endpoint.NewEndpoint(res.Name, endpoint.RecordTypeTXT, res.Text))
}
}
return endpoints, nil
}
// ApplyChanges applies the given changes.
func (p *InfobloxProvider) ApplyChanges(changes *plan.Changes) error {
zones, err := p.zones()
if err != nil {
return err
}
created, deleted := p.mapChanges(zones, changes)
p.deleteRecords(deleted)
p.createRecords(created)
return nil
}
func (p *InfobloxProvider) zones() ([]ibclient.ZoneAuth, error) {
var res, result []ibclient.ZoneAuth
obj := ibclient.NewZoneAuth(ibclient.ZoneAuth{})
err := p.client.GetObject(obj, "", &res)
if err != nil {
return nil, err
}
for _, zone := range res {
if !p.domainFilter.Match(zone.Fqdn) {
continue
}
if !p.zoneIDFilter.Match(zone.Ref) {
continue
}
result = append(result, zone)
}
return result, nil
}
type infobloxChangeMap map[string][]*endpoint.Endpoint
func (p *InfobloxProvider) mapChanges(zones []ibclient.ZoneAuth, changes *plan.Changes) (infobloxChangeMap, infobloxChangeMap) {
created := infobloxChangeMap{}
deleted := infobloxChangeMap{}
mapChange := func(changeMap infobloxChangeMap, change *endpoint.Endpoint) {
zone := p.findZone(zones, change.DNSName)
if zone == nil {
logrus.Infof("Ignoring changes to '%s' because a suitable Infoblox DNS zone was not found.", change.DNSName)
return
}
// Ensure the record type is suitable
changeMap[zone.Fqdn] = append(changeMap[zone.Fqdn], change)
}
for _, change := range changes.Delete {
mapChange(deleted, change)
}
for _, change := range changes.UpdateOld {
mapChange(deleted, change)
}
for _, change := range changes.Create {
mapChange(created, change)
}
for _, change := range changes.UpdateNew {
mapChange(created, change)
}
return created, deleted
}
func (p *InfobloxProvider) findZone(zones []ibclient.ZoneAuth, name string) *ibclient.ZoneAuth {
var result *ibclient.ZoneAuth
// Go through every zone looking for the longest name (i.e. most specific) as a matching suffix
for idx := range zones {
zone := &zones[idx]
if strings.HasSuffix(name, zone.Fqdn) {
if result == nil || len(zone.Fqdn) > len(result.Fqdn) {
result = zone
}
}
}
return result
}
func (p *InfobloxProvider) recordSet(ep *endpoint.Endpoint, getObject bool) (recordSet infobloxRecordSet, err error) {
switch ep.RecordType {
case endpoint.RecordTypeA:
var res []ibclient.RecordA
obj := ibclient.NewRecordA(
ibclient.RecordA{
Name: ep.DNSName,
Ipv4Addr: ep.Targets[0],
},
)
if getObject {
err = p.client.GetObject(obj, "", &res)
if err != nil {
return
}
}
recordSet = infobloxRecordSet{
obj: obj,
res: &res,
}
case endpoint.RecordTypeCNAME:
var res []ibclient.RecordCNAME
obj := ibclient.NewRecordCNAME(
ibclient.RecordCNAME{
Name: ep.DNSName,
Canonical: ep.Targets[0],
},
)
if getObject {
err = p.client.GetObject(obj, "", &res)
if err != nil {
return
}
}
recordSet = infobloxRecordSet{
obj: obj,
res: &res,
}
case endpoint.RecordTypeTXT:
var res []ibclient.RecordTXT
// The Infoblox API strips enclosing double quotes from TXT records lacking whitespace.
// Here we reconcile that fact by making this state match that reality.
if target, err2 := strconv.Unquote(ep.Targets[0]); err2 == nil && !strings.Contains(ep.Targets[0], " ") {
ep.Targets = endpoint.Targets{target}
}
obj := ibclient.NewRecordTXT(
ibclient.RecordTXT{
Name: ep.DNSName,
Text: ep.Targets[0],
},
)
if getObject {
err = p.client.GetObject(obj, "", &res)
if err != nil {
return
}
}
recordSet = infobloxRecordSet{
obj: obj,
res: &res,
}
}
return
}
func (p *InfobloxProvider) createRecords(created infobloxChangeMap) {
for zone, endpoints := range created {
for _, ep := range endpoints {
if p.dryRun {
logrus.Infof(
"Would create %s record named '%s' to '%s' for Infoblox DNS zone '%s'.",
ep.RecordType,
ep.DNSName,
ep.Targets,
zone,
)
continue
}
logrus.Infof(
"Creating %s record named '%s' to '%s' for Infoblox DNS zone '%s'.",
ep.RecordType,
ep.DNSName,
ep.Targets,
zone,
)
recordSet, err := p.recordSet(ep, false)
if err != nil {
logrus.Errorf(
"Failed to retrieve %s record named '%s' to '%s' for DNS zone '%s': %v",
ep.RecordType,
ep.DNSName,
ep.Targets,
zone,
err,
)
continue
}
_, err = p.client.CreateObject(recordSet.obj)
if err != nil {
logrus.Errorf(
"Failed to create %s record named '%s' to '%s' for DNS zone '%s': %v",
ep.RecordType,
ep.DNSName,
ep.Targets,
zone,
err,
)
}
}
}
}
func (p *InfobloxProvider) deleteRecords(deleted infobloxChangeMap) {
// Delete records first
for zone, endpoints := range deleted {
for _, ep := range endpoints {
if p.dryRun {
logrus.Infof("Would delete %s record named '%s' for Infoblox DNS zone '%s'.", ep.RecordType, ep.DNSName, zone)
} else {
logrus.Infof("Deleting %s record named '%s' for Infoblox DNS zone '%s'.", ep.RecordType, ep.DNSName, zone)
recordSet, err := p.recordSet(ep, true)
if err != nil {
logrus.Errorf(
"Failed to retrieve %s record named '%s' to '%s' for DNS zone '%s': %v",
ep.RecordType,
ep.DNSName,
ep.Targets,
zone,
err,
)
continue
}
switch ep.RecordType {
case endpoint.RecordTypeA:
for _, record := range *recordSet.res.(*[]ibclient.RecordA) {
_, err = p.client.DeleteObject(record.Ref)
}
case endpoint.RecordTypeCNAME:
for _, record := range *recordSet.res.(*[]ibclient.RecordCNAME) {
_, err = p.client.DeleteObject(record.Ref)
}
case endpoint.RecordTypeTXT:
for _, record := range *recordSet.res.(*[]ibclient.RecordTXT) {
_, err = p.client.DeleteObject(record.Ref)
}
}
if err != nil {
logrus.Errorf(
"Failed to delete %s record named '%s' for Infoblox DNS zone '%s': %v",
ep.RecordType,
ep.DNSName,
zone,
err,
)
}
}
}
}
}
func lookupEnvAtoi(key string, fallback int) (i int) {
val, ok := os.LookupEnv(key)
if !ok {
i = fallback
return
}
i, err := strconv.Atoi(val)
if err != nil {
i = fallback
return
}
return
}