mirror of
https://github.com/StackExchange/dnscontrol.git
synced 2024-05-11 05:55:12 +00:00
Add SoftLayer DNS provider (#59)
Add SoftLayer DNS as a DomainServiceProvider. The SoftLayer API is a bit of a mess and treats MX and SRV records differently. This leads to some replication and custom handling issues to work around. In this patch I have to change the SRV test case to be _tcp instead of _protocol because softlayer requires a "known" protocol which AFAICT is tcp, udp or tls. I think this will be acceptable in most cases. Signed-off-by: Jamie Lennox <jamielennox@gmail.com>
This commit is contained in:
Jamie Lennox
committed by
Tom Limoncelli
Tom Limoncelli
parent
e7535fe3cb
commit
7daa7a6467
349
providers/softlayer/softlayer.go
Normal file
349
providers/softlayer/softlayer.go
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@@ -0,0 +1,349 @@
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package softlayer
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import (
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"encoding/json"
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"fmt"
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"regexp"
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"strings"
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"github.com/StackExchange/dnscontrol/models"
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"github.com/StackExchange/dnscontrol/providers"
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"github.com/StackExchange/dnscontrol/providers/diff"
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"github.com/miekg/dns/dnsutil"
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"github.com/softlayer/softlayer-go/datatypes"
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"github.com/softlayer/softlayer-go/filter"
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"github.com/softlayer/softlayer-go/services"
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"github.com/softlayer/softlayer-go/session"
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)
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type SoftLayer struct {
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Session *session.Session
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}
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func init() {
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providers.RegisterDomainServiceProviderType("SOFTLAYER", newReg, providers.CanUseSRV)
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}
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func newReg(conf map[string]string, _ json.RawMessage) (providers.DNSServiceProvider, error) {
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s := session.New(conf["username"], conf["api_key"], conf["endpoint_url"], conf["timeout"])
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if len(s.UserName) == 0 || len(s.APIKey) == 0 {
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return nil, fmt.Errorf("SoftLayer UserName and APIKey must be provided")
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}
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//s.Debug = true
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api := &SoftLayer{
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Session: s,
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}
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return api, nil
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}
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func (s *SoftLayer) GetNameservers(domain string) ([]*models.Nameserver, error) {
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// Always use the same nameservers for softlayer
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nservers := []string{"ns1.softlayer.com", "ns2.softlayer.com"}
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return models.StringsToNameservers(nservers), nil
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}
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func (s *SoftLayer) GetDomainCorrections(dc *models.DomainConfig) ([]*models.Correction, error) {
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corrections := []*models.Correction{}
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domain, err := s.getDomain(&dc.Name)
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if err != nil {
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return nil, err
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}
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actual, err := s.getExistingRecords(domain)
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if err != nil {
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return nil, err
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}
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_, create, delete, modify := diff.New(dc).IncrementalDiff(actual)
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for _, del := range delete {
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existing := del.Existing.Original.(datatypes.Dns_Domain_ResourceRecord)
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corrections = append(corrections, &models.Correction{
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Msg: del.String(),
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F: s.deleteRecordFunc(*existing.Id),
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})
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}
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for _, cre := range create {
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corrections = append(corrections, &models.Correction{
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Msg: cre.String(),
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F: s.createRecordFunc(cre.Desired, domain),
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})
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}
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for _, mod := range modify {
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existing := mod.Existing.Original.(datatypes.Dns_Domain_ResourceRecord)
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corrections = append(corrections, &models.Correction{
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Msg: mod.String(),
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F: s.updateRecordFunc(&existing, mod.Desired),
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})
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}
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return corrections, nil
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}
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func (s *SoftLayer) getDomain(name *string) (*datatypes.Dns_Domain, error) {
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domains, err := services.GetAccountService(s.Session).
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Filter(filter.Path("domains.name").Eq(name).Build()).
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Mask("resourceRecords").
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GetDomains()
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if err != nil {
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return nil, err
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}
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if len(domains) == 0 {
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return nil, fmt.Errorf("Didn't find a domain matching %s", *name)
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} else if len(domains) > 1 {
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return nil, fmt.Errorf("Found %d domains matching %s", len(domains), *name)
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}
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return &domains[0], nil
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}
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func (s *SoftLayer) getExistingRecords(domain *datatypes.Dns_Domain) ([]*models.RecordConfig, error) {
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actual := []*models.RecordConfig{}
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for _, record := range domain.ResourceRecords {
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recType := strings.ToUpper(*record.Type)
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if recType == "SOA" {
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continue
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}
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recConfig := &models.RecordConfig{
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Type: recType,
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Target: *record.Data,
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TTL: uint32(*record.Ttl),
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Original: record,
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}
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switch recType {
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case "SRV":
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var service, protocol string = "", "_tcp"
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if record.Weight != nil {
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recConfig.SrvWeight = uint16(*record.Weight)
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}
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if record.Port != nil {
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recConfig.SrvPort = uint16(*record.Port)
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}
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if record.Priority != nil {
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recConfig.SrvPriority = uint16(*record.Priority)
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}
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if record.Protocol != nil {
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protocol = *record.Protocol
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}
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if record.Service != nil {
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service = *record.Service
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}
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recConfig.Name = fmt.Sprintf("%s.%s", service, strings.ToLower(protocol))
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case "MX":
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if record.MxPriority != nil {
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recConfig.MxPreference = uint16(*record.MxPriority)
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}
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fallthrough
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default:
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recConfig.Name = *record.Host
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}
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recConfig.NameFQDN = dnsutil.AddOrigin(recConfig.Name, *domain.Name)
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actual = append(actual, recConfig)
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}
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return actual, nil
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}
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func (s *SoftLayer) createRecordFunc(desired *models.RecordConfig, domain *datatypes.Dns_Domain) func() error {
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var ttl, preference, domainId int = int(desired.TTL), int(desired.MxPreference), *domain.Id
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var weight, priority, port int = int(desired.SrvWeight), int(desired.SrvPriority), int(desired.SrvPort)
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var host, data, newType string = desired.Name, desired.Target, desired.Type
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var err error = nil
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srvRegexp := regexp.MustCompile(`^_(?P<Service>\w+)\.\_(?P<Protocol>\w+)$`)
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return func() error {
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newRecord := datatypes.Dns_Domain_ResourceRecord{
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DomainId: &domainId,
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Ttl: &ttl,
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Type: &newType,
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Data: &data,
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Host: &host,
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}
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switch newType {
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case "MX":
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service := services.GetDnsDomainResourceRecordMxTypeService(s.Session)
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newRecord.MxPriority = &preference
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newMx := datatypes.Dns_Domain_ResourceRecord_MxType{
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Dns_Domain_ResourceRecord: newRecord,
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}
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_, err = service.CreateObject(&newMx)
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case "SRV":
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service := services.GetDnsDomainResourceRecordSrvTypeService(s.Session)
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result := srvRegexp.FindStringSubmatch(host)
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if len(result) != 3 {
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return fmt.Errorf("SRV Record must match format \"_service._protocol\" not %s", host)
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}
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var serviceName, protocol string = result[1], strings.ToLower(result[2])
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newSrv := datatypes.Dns_Domain_ResourceRecord_SrvType{
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Dns_Domain_ResourceRecord: newRecord,
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Service: &serviceName,
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Port: &port,
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Priority: &priority,
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Protocol: &protocol,
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Weight: &weight,
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}
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_, err = service.CreateObject(&newSrv)
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default:
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service := services.GetDnsDomainResourceRecordService(s.Session)
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_, err = service.CreateObject(&newRecord)
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}
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return err
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}
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}
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func (s *SoftLayer) deleteRecordFunc(resId int) func() error {
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// seems to be no problem deleting MX and SRV records via common interface
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return func() error {
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_, err := services.GetDnsDomainResourceRecordService(s.Session).
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Id(resId).
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DeleteObject()
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return err
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}
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}
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func (s *SoftLayer) updateRecordFunc(existing *datatypes.Dns_Domain_ResourceRecord, desired *models.RecordConfig) func() error {
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var ttl, preference int = int(desired.TTL), int(desired.MxPreference)
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var priority, weight, port int = int(desired.SrvPriority), int(desired.SrvWeight), int(desired.SrvPort)
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return func() error {
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var changes bool = false
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var err error = nil
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switch desired.Type {
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case "MX":
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service := services.GetDnsDomainResourceRecordMxTypeService(s.Session)
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updated := datatypes.Dns_Domain_ResourceRecord_MxType{}
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if desired.Name != *existing.Host {
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updated.Host = &desired.Name
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changes = true
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}
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if desired.Target != *existing.Data {
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updated.Data = &desired.Target
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changes = true
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}
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if ttl != *existing.Ttl {
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updated.Ttl = &ttl
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changes = true
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}
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if preference != *existing.MxPriority {
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updated.MxPriority = &preference
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changes = true
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}
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if !changes {
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return fmt.Errorf("Error: Didn't find changes when I expect some.")
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}
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_, err = service.Id(*existing.Id).EditObject(&updated)
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case "SRV":
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service := services.GetDnsDomainResourceRecordSrvTypeService(s.Session)
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updated := datatypes.Dns_Domain_ResourceRecord_SrvType{}
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if desired.Name != *existing.Host {
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updated.Host = &desired.Name
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changes = true
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}
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if desired.Target != *existing.Data {
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updated.Data = &desired.Target
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changes = true
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}
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if ttl != *existing.Ttl {
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updated.Ttl = &ttl
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changes = true
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}
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if priority != *existing.Priority {
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updated.Priority = &priority
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changes = true
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}
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if weight != *existing.Weight {
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updated.Weight = &weight
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changes = true
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}
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if port != *existing.Port {
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updated.Port = &port
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changes = true
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}
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// TODO: handle service & protocol - or does that just result in a
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// delete and recreate?
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if !changes {
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return fmt.Errorf("Error: Didn't find changes when I expect some.")
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}
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_, err = service.Id(*existing.Id).EditObject(&updated)
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default:
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service := services.GetDnsDomainResourceRecordService(s.Session)
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updated := datatypes.Dns_Domain_ResourceRecord{}
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if desired.Name != *existing.Host {
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updated.Host = &desired.Name
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changes = true
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}
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if desired.Target != *existing.Data {
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updated.Data = &desired.Target
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changes = true
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}
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if ttl != *existing.Ttl {
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updated.Ttl = &ttl
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changes = true
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}
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if !changes {
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return fmt.Errorf("Error: Didn't find changes when I expect some.")
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}
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_, err = service.Id(*existing.Id).EditObject(&updated)
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}
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return err
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}
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}
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