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resource_aws_route53_record.go
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resource_aws_route53_record.go
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package aws
import (
"bytes"
"errors"
"fmt"
"log"
"strings"
"time"
"github.com/hashicorp/terraform/helper/hashcode"
"github.com/hashicorp/terraform/helper/resource"
"github.com/hashicorp/terraform/helper/schema"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/service/route53"
)
var r53NoRecordsFound = errors.New("No matching Hosted Zone found")
var r53NoHostedZoneFound = errors.New("No matching records found")
func resourceAwsRoute53Record() *schema.Resource {
return &schema.Resource{
Create: resourceAwsRoute53RecordCreate,
Read: resourceAwsRoute53RecordRead,
Update: resourceAwsRoute53RecordUpdate,
Delete: resourceAwsRoute53RecordDelete,
Schema: map[string]*schema.Schema{
"name": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
StateFunc: func(v interface{}) string {
value := v.(string)
return strings.ToLower(value)
},
},
"fqdn": &schema.Schema{
Type: schema.TypeString,
Computed: true,
},
"type": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"zone_id": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
ValidateFunc: func(v interface{}, k string) (ws []string, es []error) {
value := v.(string)
if value == "" {
es = append(es, fmt.Errorf("Cannot have empty zone_id"))
}
return
},
},
"ttl": &schema.Schema{
Type: schema.TypeInt,
Optional: true,
ConflictsWith: []string{"alias"},
},
// Weight uses a special sentinel value to indicate it's presense.
// Because 0 is a valid value for Weight, we default to -1 so that any
// inclusion of a weight (zero or not) will be a usable value
"weight": &schema.Schema{
Type: schema.TypeInt,
Optional: true,
Default: -1,
},
"set_identifier": &schema.Schema{
Type: schema.TypeString,
Optional: true,
ForceNew: true,
},
"alias": &schema.Schema{
Type: schema.TypeSet,
Optional: true,
ConflictsWith: []string{"records", "ttl"},
Elem: &schema.Resource{
Schema: map[string]*schema.Schema{
"zone_id": &schema.Schema{
Type: schema.TypeString,
Required: true,
},
"name": &schema.Schema{
Type: schema.TypeString,
Required: true,
},
"evaluate_target_health": &schema.Schema{
Type: schema.TypeBool,
Required: true,
},
},
},
Set: resourceAwsRoute53AliasRecordHash,
},
"failover": &schema.Schema{ // PRIMARY | SECONDARY
Type: schema.TypeString,
Optional: true,
},
"health_check_id": &schema.Schema{ // ID of health check
Type: schema.TypeString,
Optional: true,
},
"records": &schema.Schema{
Type: schema.TypeSet,
ConflictsWith: []string{"alias"},
Elem: &schema.Schema{Type: schema.TypeString},
Optional: true,
Set: schema.HashString,
},
},
}
}
func resourceAwsRoute53RecordUpdate(d *schema.ResourceData, meta interface{}) error {
// Route 53 supports CREATE, DELETE, and UPSERT actions. We use UPSERT, and
// AWS dynamically determines if a record should be created or updated.
// Amazon Route 53 can update an existing resource record set only when all
// of the following values match: Name, Type
// (and SetIdentifier, which we don't use yet).
// See http://docs.aws.amazon.com/Route53/latest/APIReference/API_ChangeResourceRecordSets_Requests.html#change-rrsets-request-action
//
// Because we use UPSERT, for resouce update here we simply fall through to
// our resource create function.
return resourceAwsRoute53RecordCreate(d, meta)
}
func resourceAwsRoute53RecordCreate(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).r53conn
zone := cleanZoneID(d.Get("zone_id").(string))
var err error
zoneRecord, err := conn.GetHostedZone(&route53.GetHostedZoneInput{Id: aws.String(zone)})
if err != nil {
return err
}
if zoneRecord.HostedZone == nil {
return fmt.Errorf("[WARN] No Route53 Zone found for id (%s)", zone)
}
// Build the record
rec, err := resourceAwsRoute53RecordBuildSet(d, *zoneRecord.HostedZone.Name)
if err != nil {
return err
}
// Create the new records. We abuse StateChangeConf for this to
// retry for us since Route53 sometimes returns errors about another
// operation happening at the same time.
changeBatch := &route53.ChangeBatch{
Comment: aws.String("Managed by Terraform"),
Changes: []*route53.Change{
&route53.Change{
Action: aws.String("UPSERT"),
ResourceRecordSet: rec,
},
},
}
req := &route53.ChangeResourceRecordSetsInput{
HostedZoneId: aws.String(cleanZoneID(*zoneRecord.HostedZone.Id)),
ChangeBatch: changeBatch,
}
log.Printf("[DEBUG] Creating resource records for zone: %s, name: %s\n\n%s",
zone, *rec.Name, req)
wait := resource.StateChangeConf{
Pending: []string{"rejected"},
Target: []string{"accepted"},
Timeout: 5 * time.Minute,
MinTimeout: 1 * time.Second,
Refresh: func() (interface{}, string, error) {
resp, err := conn.ChangeResourceRecordSets(req)
if err != nil {
if r53err, ok := err.(awserr.Error); ok {
if r53err.Code() == "PriorRequestNotComplete" {
// There is some pending operation, so just retry
// in a bit.
return nil, "rejected", nil
}
}
return nil, "failure", err
}
return resp, "accepted", nil
},
}
respRaw, err := wait.WaitForState()
if err != nil {
return err
}
changeInfo := respRaw.(*route53.ChangeResourceRecordSetsOutput).ChangeInfo
// Generate an ID
vars := []string{
zone,
strings.ToLower(d.Get("name").(string)),
d.Get("type").(string),
}
if v, ok := d.GetOk("set_identifier"); ok {
vars = append(vars, v.(string))
}
d.SetId(strings.Join(vars, "_"))
// Wait until we are done
wait = resource.StateChangeConf{
Delay: 30 * time.Second,
Pending: []string{"PENDING"},
Target: []string{"INSYNC"},
Timeout: 30 * time.Minute,
MinTimeout: 5 * time.Second,
Refresh: func() (result interface{}, state string, err error) {
changeRequest := &route53.GetChangeInput{
Id: aws.String(cleanChangeID(*changeInfo.Id)),
}
return resourceAwsGoRoute53Wait(conn, changeRequest)
},
}
_, err = wait.WaitForState()
if err != nil {
return err
}
return resourceAwsRoute53RecordRead(d, meta)
}
func resourceAwsRoute53RecordRead(d *schema.ResourceData, meta interface{}) error {
record, err := findRecord(d, meta)
if err != nil {
switch err {
case r53NoHostedZoneFound, r53NoRecordsFound:
log.Printf("[DEBUG] %s for: %s, removing from state file", err, d.Id())
d.SetId("")
return nil
default:
return err
}
}
err = d.Set("records", flattenResourceRecords(record.ResourceRecords))
if err != nil {
return fmt.Errorf("[DEBUG] Error setting records for: %s, error: %#v", d.Id(), err)
}
d.Set("ttl", record.TTL)
// Only set the weight if it's non-nil, otherwise we end up with a 0 weight
// which has actual contextual meaning with Route 53 records
// See http://docs.aws.amazon.com/fr_fr/Route53/latest/APIReference/API_ChangeResourceRecordSets_Examples.html
if record.Weight != nil {
d.Set("weight", record.Weight)
}
d.Set("set_identifier", record.SetIdentifier)
d.Set("failover", record.Failover)
d.Set("health_check_id", record.HealthCheckId)
return nil
}
// findRecord takes a ResourceData struct for aws_resource_route53_record. It
// uses the referenced zone_id to query Route53 and find information on it's
// records.
//
// If records are found, it returns the matching
// route53.ResourceRecordSet and nil for the error.
//
// If no hosted zone is found, it returns a nil recordset and r53NoHostedZoneFound
// error.
//
// If no matching recordset is found, it returns nil and a r53NoRecordsFound
// error
//
// If there are other errors, it returns nil a nil recordset and passes on the
// error.
func findRecord(d *schema.ResourceData, meta interface{}) (*route53.ResourceRecordSet, error) {
conn := meta.(*AWSClient).r53conn
// Scan for a
zone := cleanZoneID(d.Get("zone_id").(string))
// get expanded name
zoneRecord, err := conn.GetHostedZone(&route53.GetHostedZoneInput{Id: aws.String(zone)})
if err != nil {
if r53err, ok := err.(awserr.Error); ok && r53err.Code() == "NoSuchHostedZone" {
return nil, r53NoHostedZoneFound
}
return nil, err
}
en := expandRecordName(d.Get("name").(string), *zoneRecord.HostedZone.Name)
log.Printf("[DEBUG] Expanded record name: %s", en)
d.Set("fqdn", en)
lopts := &route53.ListResourceRecordSetsInput{
HostedZoneId: aws.String(cleanZoneID(zone)),
StartRecordName: aws.String(en),
StartRecordType: aws.String(d.Get("type").(string)),
}
log.Printf("[DEBUG] List resource records sets for zone: %s, opts: %s",
zone, lopts)
resp, err := conn.ListResourceRecordSets(lopts)
if err != nil {
return nil, err
}
for _, record := range resp.ResourceRecordSets {
name := cleanRecordName(*record.Name)
if FQDN(strings.ToLower(name)) != FQDN(strings.ToLower(*lopts.StartRecordName)) {
continue
}
if strings.ToUpper(*record.Type) != strings.ToUpper(*lopts.StartRecordType) {
continue
}
if record.SetIdentifier != nil && *record.SetIdentifier != d.Get("set_identifier") {
continue
}
// The only safe return where a record is found
return record, nil
}
return nil, r53NoRecordsFound
}
func resourceAwsRoute53RecordDelete(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).r53conn
// Get the records
rec, err := findRecord(d, meta)
if err != nil {
switch err {
case r53NoHostedZoneFound, r53NoRecordsFound:
log.Printf("[DEBUG] %s for: %s, removing from state file", err, d.Id())
d.SetId("")
return nil
default:
return err
}
}
// Change batch for deleting
changeBatch := &route53.ChangeBatch{
Comment: aws.String("Deleted by Terraform"),
Changes: []*route53.Change{
&route53.Change{
Action: aws.String("DELETE"),
ResourceRecordSet: rec,
},
},
}
zone := cleanZoneID(d.Get("zone_id").(string))
req := &route53.ChangeResourceRecordSetsInput{
HostedZoneId: aws.String(cleanZoneID(zone)),
ChangeBatch: changeBatch,
}
wait := resource.StateChangeConf{
Pending: []string{"rejected"},
Target: []string{"accepted"},
Timeout: 5 * time.Minute,
MinTimeout: 1 * time.Second,
Refresh: func() (interface{}, string, error) {
_, err := conn.ChangeResourceRecordSets(req)
if err != nil {
if r53err, ok := err.(awserr.Error); ok {
if r53err.Code() == "PriorRequestNotComplete" {
// There is some pending operation, so just retry
// in a bit.
return 42, "rejected", nil
}
if r53err.Code() == "InvalidChangeBatch" {
// This means that the record is already gone.
return 42, "accepted", nil
}
}
return 42, "failure", err
}
return 42, "accepted", nil
},
}
if _, err := wait.WaitForState(); err != nil {
return err
}
return nil
}
func resourceAwsRoute53RecordBuildSet(d *schema.ResourceData, zoneName string) (*route53.ResourceRecordSet, error) {
// get expanded name
en := expandRecordName(d.Get("name").(string), zoneName)
// Create the RecordSet request with the fully expanded name, e.g.
// sub.domain.com. Route 53 requires a fully qualified domain name, but does
// not require the trailing ".", which it will itself, so we don't call FQDN
// here.
rec := &route53.ResourceRecordSet{
Name: aws.String(en),
Type: aws.String(d.Get("type").(string)),
}
if v, ok := d.GetOk("ttl"); ok {
rec.TTL = aws.Int64(int64(v.(int)))
}
// Resource records
if v, ok := d.GetOk("records"); ok {
recs := v.(*schema.Set).List()
rec.ResourceRecords = expandResourceRecords(recs, d.Get("type").(string))
}
// Alias record
if v, ok := d.GetOk("alias"); ok {
aliases := v.(*schema.Set).List()
if len(aliases) > 1 {
return nil, fmt.Errorf("You can only define a single alias target per record")
}
alias := aliases[0].(map[string]interface{})
rec.AliasTarget = &route53.AliasTarget{
DNSName: aws.String(alias["name"].(string)),
EvaluateTargetHealth: aws.Bool(alias["evaluate_target_health"].(bool)),
HostedZoneId: aws.String(alias["zone_id"].(string)),
}
log.Printf("[DEBUG] Creating alias: %#v", alias)
} else {
if _, ok := d.GetOk("ttl"); !ok {
return nil, fmt.Errorf(`provider.aws: aws_route53_record: %s: "ttl": required field is not set`, d.Get("name").(string))
}
if _, ok := d.GetOk("records"); !ok {
return nil, fmt.Errorf(`provider.aws: aws_route53_record: %s: "records": required field is not set`, d.Get("name").(string))
}
}
if v, ok := d.GetOk("failover"); ok {
rec.Failover = aws.String(v.(string))
}
if v, ok := d.GetOk("health_check_id"); ok {
rec.HealthCheckId = aws.String(v.(string))
}
if v, ok := d.GetOk("set_identifier"); ok {
rec.SetIdentifier = aws.String(v.(string))
}
w := d.Get("weight").(int)
if w > -1 {
rec.Weight = aws.Int64(int64(w))
}
return rec, nil
}
func FQDN(name string) string {
n := len(name)
if n == 0 || name[n-1] == '.' {
return name
} else {
return name + "."
}
}
// Route 53 stores the "*" wildcard indicator as ASCII 42 and returns the
// octal equivalent, "\\052". Here we look for that, and convert back to "*"
// as needed.
func cleanRecordName(name string) string {
str := name
if strings.HasPrefix(name, "\\052") {
str = strings.Replace(name, "\\052", "*", 1)
log.Printf("[DEBUG] Replacing octal \\052 for * in: %s", name)
}
return str
}
// Check if the current record name contains the zone suffix.
// If it does not, add the zone name to form a fully qualified name
// and keep AWS happy.
func expandRecordName(name, zone string) string {
rn := strings.ToLower(strings.TrimSuffix(name, "."))
zone = strings.TrimSuffix(zone, ".")
if !strings.HasSuffix(rn, zone) {
rn = strings.Join([]string{name, zone}, ".")
}
return rn
}
func resourceAwsRoute53AliasRecordHash(v interface{}) int {
var buf bytes.Buffer
m := v.(map[string]interface{})
buf.WriteString(fmt.Sprintf("%s-", m["name"].(string)))
buf.WriteString(fmt.Sprintf("%s-", m["zone_id"].(string)))
buf.WriteString(fmt.Sprintf("%t-", m["evaluate_target_health"].(bool)))
return hashcode.String(buf.String())
}