func isSubdomain(sub, parent string) bool {
sub, parent = config.WithTrailingDot(sub), config.WithTrailingDot(parent)
subParts, parentParts := strings.Split(sub, "."), strings.Split(parent, ".")
if len(parentParts) > len(subParts) {
return false
}
subSuffixes := subParts[len(subParts)-len(parentParts):]
if len(subSuffixes) != len(parentParts) {
return false
}
for i := range subSuffixes {
if subSuffixes[i] != parentParts[i] {
return false
}
}
return true
}
func (r53 dummyR53Service) ListHostedZonesByName(input *route53.ListHostedZonesByNameInput) (*route53.ListHostedZonesByNameOutput, error) {
output := &route53.ListHostedZonesByNameOutput{}
for _, zone := range r53.HostedZones {
if zone.DNS == config.WithTrailingDot(aws.StringValue(input.DNSName)) {
output.HostedZones = append(output.HostedZones, &route53.HostedZone{
Name: aws.String(zone.DNS),
Id: aws.String(zone.Id),
})
}
}
return output, nil
}
func (c *Cluster) validateDNSConfig(r53 r53Service) error {
if !c.CreateRecordSet {
return nil
}
zonesResp, err := r53.ListHostedZonesByName(&route53.ListHostedZonesByNameInput{
DNSName: aws.String(c.HostedZone),
})
if err != nil {
return fmt.Errorf("Error validating HostedZone: %s", err)
}
zones := zonesResp.HostedZones
if len(zones) == 0 || (*zones[0].Name != c.HostedZone) {
return fmt.Errorf(
"HostedZone %s does not exist. You'll need to create it manually",
c.HostedZone,
)
}
recordSetsResp, err := r53.ListResourceRecordSets(
&route53.ListResourceRecordSetsInput{
HostedZoneId: zones[0].Id,
},
)
if len(recordSetsResp.ResourceRecordSets) > 0 {
for _, recordSet := range recordSetsResp.ResourceRecordSets {
if *recordSet.Name == config.WithTrailingDot(c.ExternalDNSName) {
return fmt.Errorf(
"RecordSet for \"%s\" already exists in Hosted Zone \"%s.\"",
c.ExternalDNSName,
c.HostedZone,
)
}
}
}
return nil
}
func (c *Cluster) validateDNSConfig(r53 r53Service) error {
if !c.CreateRecordSet {
return nil
}
if c.HostedZoneID == "" {
//TODO(colhom): When HostedZone parameter is gone, this block can be removed
//Config will gaurantee that HostedZoneID is set from the get-go
listHostedZoneInput := route53.ListHostedZonesByNameInput{
DNSName: aws.String(c.HostedZone),
}
zonesResp, err := r53.ListHostedZonesByName(&listHostedZoneInput)
if err != nil {
return fmt.Errorf("Error validating HostedZone: %s", err)
}
zones := zonesResp.HostedZones
if len(zones) == 0 {
return fmt.Errorf("hosted zone %s does not exist", c.HostedZone)
}
var matchingZone *route53.HostedZone
for _, zone := range zones {
if aws.StringValue(zone.Name) == c.HostedZone {
if matchingZone != nil {
//This means we've found another match, and HostedZone is ambiguous
return fmt.Errorf("multiple hosted-zones found for DNS name \"%s\"", c.HostedZone)
}
matchingZone = zone
} else {
/* Weird API semantics: if we see a zone which doesn't match the name
we've exhausted all zones which match the name
http://docs.aws.amazon.com/cli/latest/reference/route53/list-hosted-zones-by-name.html#options */
break
}
}
if matchingZone == nil {
return fmt.Errorf("hosted zone %s does not exist", c.HostedZone)
}
c.HostedZoneID = aws.StringValue(matchingZone.Id)
}
hzOut, err := r53.GetHostedZone(&route53.GetHostedZoneInput{Id: aws.String(c.HostedZoneID)})
if err != nil {
return fmt.Errorf("error getting hosted zone %s: %v", c.HostedZoneID, err)
}
if !isSubdomain(c.ExternalDNSName, aws.StringValue(hzOut.HostedZone.Name)) {
return fmt.Errorf("externalDNSName %s is not a sub-domain of hosted-zone %s", c.ExternalDNSName, aws.StringValue(hzOut.HostedZone.Name))
}
recordSetsResp, err := r53.ListResourceRecordSets(
&route53.ListResourceRecordSetsInput{
HostedZoneId: hzOut.HostedZone.Id,
},
)
if err != nil {
return fmt.Errorf("error listing record sets for hosted zone id = %s: %v", c.HostedZoneID, err)
}
if len(recordSetsResp.ResourceRecordSets) > 0 {
for _, recordSet := range recordSetsResp.ResourceRecordSets {
if *recordSet.Name == config.WithTrailingDot(c.ExternalDNSName) {
return fmt.Errorf(
"RecordSet for \"%s\" already exists in Hosted Zone \"%s.\"",
c.ExternalDNSName,
c.HostedZone,
)
}
}
}
return nil
}