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aws.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 aws
import (
"context"
"errors"
"fmt"
"regexp"
"sort"
"strconv"
"strings"
"time"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/service/route53"
route53types "github.com/aws/aws-sdk-go-v2/service/route53/types"
log "github.com/sirupsen/logrus"
"sigs.k8s.io/external-dns/endpoint"
"sigs.k8s.io/external-dns/plan"
"sigs.k8s.io/external-dns/provider"
)
const (
defaultAWSProfile = "default"
recordTTL = 300
// From the experiments, it seems that the default MaxItems applied is 100,
// and that, on the server side, there is a hard limit of 300 elements per page.
// After a discussion with AWS representatives, clients should accept
// when fewer items are returned, and still paginate accordingly.
// As we are using the standard AWS client, this should already be compliant.
// Hence, if AWS ever decides to raise this limit, we will automatically reduce the pressure on rate limits
route53PageSize int32 = 300
// providerSpecificAlias specifies whether a CNAME endpoint maps to an AWS ALIAS record.
providerSpecificAlias = "alias"
providerSpecificTargetHostedZone = "aws/target-hosted-zone"
// providerSpecificEvaluateTargetHealth specifies whether an AWS ALIAS record
// has the EvaluateTargetHealth field set to true. Present iff the endpoint
// has a `providerSpecificAlias` value of `true`.
providerSpecificEvaluateTargetHealth = "aws/evaluate-target-health"
providerSpecificWeight = "aws/weight"
providerSpecificRegion = "aws/region"
providerSpecificFailover = "aws/failover"
providerSpecificGeolocationContinentCode = "aws/geolocation-continent-code"
providerSpecificGeolocationCountryCode = "aws/geolocation-country-code"
providerSpecificGeolocationSubdivisionCode = "aws/geolocation-subdivision-code"
providerSpecificMultiValueAnswer = "aws/multi-value-answer"
providerSpecificHealthCheckID = "aws/health-check-id"
sameZoneAlias = "same-zone"
)
// see elb: https://docs.aws.amazon.com/general/latest/gr/elb.html
var canonicalHostedZones = map[string]string{
// Application Load Balancers and Classic Load Balancers
"us-east-2.elb.amazonaws.com": "Z3AADJGX6KTTL2",
"us-east-1.elb.amazonaws.com": "Z35SXDOTRQ7X7K",
"us-west-1.elb.amazonaws.com": "Z368ELLRRE2KJ0",
"us-west-2.elb.amazonaws.com": "Z1H1FL5HABSF5",
"ca-central-1.elb.amazonaws.com": "ZQSVJUPU6J1EY",
"ca-west-1.elb.amazonaws.com": "Z06473681N0SF6OS049SD",
"ap-east-1.elb.amazonaws.com": "Z3DQVH9N71FHZ0",
"ap-south-1.elb.amazonaws.com": "ZP97RAFLXTNZK",
"ap-south-2.elb.amazonaws.com": "Z0173938T07WNTVAEPZN",
"ap-northeast-2.elb.amazonaws.com": "ZWKZPGTI48KDX",
"ap-northeast-3.elb.amazonaws.com": "Z5LXEXXYW11ES",
"ap-southeast-1.elb.amazonaws.com": "Z1LMS91P8CMLE5",
"ap-southeast-2.elb.amazonaws.com": "Z1GM3OXH4ZPM65",
"ap-southeast-3.elb.amazonaws.com": "Z08888821HLRG5A9ZRTER",
"ap-southeast-4.elb.amazonaws.com": "Z09517862IB2WZLPXG76F",
"ap-southeast-5.elb.amazonaws.com": "Z06010284QMVVW7WO5J",
"ap-northeast-1.elb.amazonaws.com": "Z14GRHDCWA56QT",
"eu-central-1.elb.amazonaws.com": "Z215JYRZR1TBD5",
"eu-central-2.elb.amazonaws.com": "Z06391101F2ZOEP8P5EB3",
"eu-west-1.elb.amazonaws.com": "Z32O12XQLNTSW2",
"eu-west-2.elb.amazonaws.com": "ZHURV8PSTC4K8",
"eu-west-3.elb.amazonaws.com": "Z3Q77PNBQS71R4",
"eu-north-1.elb.amazonaws.com": "Z23TAZ6LKFMNIO",
"eu-south-1.elb.amazonaws.com": "Z3ULH7SSC9OV64",
"eu-south-2.elb.amazonaws.com": "Z0956581394HF5D5LXGAP",
"sa-east-1.elb.amazonaws.com": "Z2P70J7HTTTPLU",
"cn-north-1.elb.amazonaws.com.cn": "Z1GDH35T77C1KE",
"cn-northwest-1.elb.amazonaws.com.cn": "ZM7IZAIOVVDZF",
"us-gov-west-1.elb.amazonaws.com": "Z33AYJ8TM3BH4J",
"us-gov-east-1.elb.amazonaws.com": "Z166TLBEWOO7G0",
"me-central-1.elb.amazonaws.com": "Z08230872XQRWHG2XF6I",
"me-south-1.elb.amazonaws.com": "ZS929ML54UICD",
"af-south-1.elb.amazonaws.com": "Z268VQBMOI5EKX",
"il-central-1.elb.amazonaws.com": "Z09170902867EHPV2DABU",
// Network Load Balancers https://docs.aws.amazon.com/general/latest/gr/elb.html#elb_region
"elb.us-east-2.amazonaws.com": "ZLMOA37VPKANP",
"elb.us-east-1.amazonaws.com": "Z26RNL4JYFTOTI",
"elb.us-west-1.amazonaws.com": "Z24FKFUX50B4VW",
"elb.us-west-2.amazonaws.com": "Z18D5FSROUN65G",
"elb.ca-central-1.amazonaws.com": "Z2EPGBW3API2WT",
"elb.ca-west-1.amazonaws.com": "Z02754302KBB00W2LKWZ9",
"elb.ap-east-1.amazonaws.com": "Z12Y7K3UBGUAD1",
"elb.ap-south-1.amazonaws.com": "ZVDDRBQ08TROA",
"elb.ap-south-2.amazonaws.com": "Z0711778386UTO08407HT",
"elb.ap-northeast-3.amazonaws.com": "Z1GWIQ4HH19I5X",
"elb.ap-northeast-2.amazonaws.com": "ZIBE1TIR4HY56",
"elb.ap-southeast-1.amazonaws.com": "ZKVM4W9LS7TM",
"elb.ap-southeast-2.amazonaws.com": "ZCT6FZBF4DROD",
"elb.ap-southeast-3.amazonaws.com": "Z01971771FYVNCOVWJU1G",
"elb.ap-southeast-4.amazonaws.com": "Z01156963G8MIIL7X90IV",
"elb.ap-southeast-5.amazonaws.com": "Z026317210H9ACVTRO6FB",
"elb.ap-northeast-1.amazonaws.com": "Z31USIVHYNEOWT",
"elb.eu-central-1.amazonaws.com": "Z3F0SRJ5LGBH90",
"elb.eu-central-2.amazonaws.com": "Z02239872DOALSIDCX66S",
"elb.eu-west-1.amazonaws.com": "Z2IFOLAFXWLO4F",
"elb.eu-west-2.amazonaws.com": "ZD4D7Y8KGAS4G",
"elb.eu-west-3.amazonaws.com": "Z1CMS0P5QUZ6D5",
"elb.eu-north-1.amazonaws.com": "Z1UDT6IFJ4EJM",
"elb.eu-south-1.amazonaws.com": "Z23146JA1KNAFP",
"elb.eu-south-2.amazonaws.com": "Z1011216NVTVYADP1SSV",
"elb.sa-east-1.amazonaws.com": "ZTK26PT1VY4CU",
"elb.cn-north-1.amazonaws.com.cn": "Z3QFB96KMJ7ED6",
"elb.cn-northwest-1.amazonaws.com.cn": "ZQEIKTCZ8352D",
"elb.us-gov-west-1.amazonaws.com": "ZMG1MZ2THAWF1",
"elb.us-gov-east-1.amazonaws.com": "Z1ZSMQQ6Q24QQ8",
"elb.me-central-1.amazonaws.com": "Z00282643NTTLPANJJG2P",
"elb.me-south-1.amazonaws.com": "Z3QSRYVP46NYYV",
"elb.af-south-1.amazonaws.com": "Z203XCE67M25HM",
"elb.il-central-1.amazonaws.com": "Z0313266YDI6ZRHTGQY4",
// Global Accelerator
"awsglobalaccelerator.com": "Z2BJ6XQ5FK7U4H",
// Cloudfront and AWS API Gateway edge-optimized endpoints
"cloudfront.net": "Z2FDTNDATAQYW2",
// VPC Endpoint (PrivateLink) https://github.com/kubernetes-sigs/external-dns/issues/3429#issuecomment-1440415806
"eu-west-2.vpce.amazonaws.com": "Z7K1066E3PUKB",
"us-east-2.vpce.amazonaws.com": "ZC8PG0KIFKBRI",
"af-south-1.vpce.amazonaws.com": "Z09302161J80N9A7UTP7U",
"ap-east-1.vpce.amazonaws.com": "Z2LIHJ7PKBEMWN",
"ap-northeast-1.vpce.amazonaws.com": "Z2E726K9Y6RL4W",
"ap-northeast-2.vpce.amazonaws.com": "Z27UANNT0PRK1T",
"ap-northeast-3.vpce.amazonaws.com": "Z376B5OMM2JZL2",
"ap-south-1.vpce.amazonaws.com": "Z2KVTB3ZLFM7JR",
"ap-south-2.vpce.amazonaws.com": "Z0952991RWSF5AHIQDIY",
"ap-southeast-1.vpce.amazonaws.com": "Z18LLCSTV4NVNL",
"ap-southeast-2.vpce.amazonaws.com": "ZDK2GCRPAFKGO",
"ap-southeast-3.vpce.amazonaws.com": "Z03881013RZ9BYYZO8N5W",
"ap-southeast-4.vpce.amazonaws.com": "Z07508191CO1RNBX3X3AU",
"ca-central-1.vpce.amazonaws.com": "ZRCXCF510Y6P9",
"eu-central-1.vpce.amazonaws.com": "Z273ZU8SZ5RJPC",
"eu-central-2.vpce.amazonaws.com": "Z045369019J4FUQ4S272E",
"eu-north-1.vpce.amazonaws.com": "Z3OWWK6JFDEDGC",
"eu-south-1.vpce.amazonaws.com": "Z2A5FDNRLY7KZG",
"eu-south-2.vpce.amazonaws.com": "Z014396544HENR57XQCJ",
"eu-west-1.vpce.amazonaws.com": "Z38GZ743OKFT7T",
"eu-west-3.vpce.amazonaws.com": "Z1DWHTMFP0WECP",
"me-central-1.vpce.amazonaws.com": "Z07122992YCEUCB9A9570",
"me-south-1.vpce.amazonaws.com": "Z3B95P3VBGEQGY",
"sa-east-1.vpce.amazonaws.com": "Z2LXUWEVLCVZIB",
"us-east-1.vpce.amazonaws.com": "Z7HUB22UULQXV",
"us-gov-east-1.vpce.amazonaws.com": "Z2MU5TEIGO9WXB",
"us-gov-west-1.vpce.amazonaws.com": "Z12529ZODG2B6H",
"us-west-1.vpce.amazonaws.com": "Z12I86A8N7VCZO",
"us-west-2.vpce.amazonaws.com": "Z1YSA3EXCYUU9Z",
// AWS API Gateway (Regional endpoints)
// See: https://docs.aws.amazon.com/general/latest/gr/apigateway.html
"execute-api.us-east-2.amazonaws.com": "ZOJJZC49E0EPZ",
"execute-api.us-east-1.amazonaws.com": "Z1UJRXOUMOOFQ8",
"execute-api.us-west-1.amazonaws.com": "Z2MUQ32089INYE",
"execute-api.us-west-2.amazonaws.com": "Z2OJLYMUO9EFXC",
"execute-api.af-south-1.amazonaws.com": "Z2DHW2332DAMTN",
"execute-api.ap-east-1.amazonaws.com": "Z3FD1VL90ND7K5",
"execute-api.ap-south-1.amazonaws.com": "Z3VO1THU9YC4UR",
"execute-api.ap-northeast-2.amazonaws.com": "Z20JF4UZKIW1U8",
"execute-api.ap-southeast-1.amazonaws.com": "ZL327KTPIQFUL",
"execute-api.ap-southeast-2.amazonaws.com": "Z2RPCDW04V8134",
"execute-api.ap-northeast-1.amazonaws.com": "Z1YSHQZHG15GKL",
"execute-api.ca-central-1.amazonaws.com": "Z19DQILCV0OWEC",
"execute-api.eu-central-1.amazonaws.com": "Z1U9ULNL0V5AJ3",
"execute-api.eu-west-1.amazonaws.com": "ZLY8HYME6SFDD",
"execute-api.eu-west-2.amazonaws.com": "ZJ5UAJN8Y3Z2Q",
"execute-api.eu-south-1.amazonaws.com": "Z3BT4WSQ9TDYZV",
"execute-api.eu-west-3.amazonaws.com": "Z3KY65QIEKYHQQ",
"execute-api.eu-south-2.amazonaws.com": "Z02499852UI5HEQ5JVWX3",
"execute-api.eu-north-1.amazonaws.com": "Z3UWIKFBOOGXPP",
"execute-api.me-south-1.amazonaws.com": "Z20ZBPC0SS8806",
"execute-api.me-central-1.amazonaws.com": "Z08780021BKYYY8U0YHTV",
"execute-api.sa-east-1.amazonaws.com": "ZCMLWB8V5SYIT",
"execute-api.us-gov-east-1.amazonaws.com": "Z3SE9ATJYCRCZJ",
"execute-api.us-gov-west-1.amazonaws.com": "Z1K6XKP9SAGWDV",
}
// Route53API is the subset of the AWS Route53 API that we actually use. Add methods as required. Signatures must match exactly.
// https://github.com/aws/aws-sdk-go-v2/tree/main/service/route53
type Route53API interface {
ListResourceRecordSets(ctx context.Context, input *route53.ListResourceRecordSetsInput, optFns ...func(options *route53.Options)) (*route53.ListResourceRecordSetsOutput, error)
ChangeResourceRecordSets(ctx context.Context, input *route53.ChangeResourceRecordSetsInput, optFns ...func(options *route53.Options)) (*route53.ChangeResourceRecordSetsOutput, error)
CreateHostedZone(ctx context.Context, input *route53.CreateHostedZoneInput, optFns ...func(*route53.Options)) (*route53.CreateHostedZoneOutput, error)
ListHostedZones(ctx context.Context, input *route53.ListHostedZonesInput, optFns ...func(options *route53.Options)) (*route53.ListHostedZonesOutput, error)
ListTagsForResource(ctx context.Context, input *route53.ListTagsForResourceInput, optFns ...func(options *route53.Options)) (*route53.ListTagsForResourceOutput, error)
}
// Route53Change wrapper to handle ownership relation throughout the provider implementation
type Route53Change struct {
route53types.Change
OwnedRecord string
sizeBytes int
sizeValues int
}
type Route53Changes []*Route53Change
type profiledZone struct {
profile string
zone *route53types.HostedZone
}
func (cs Route53Changes) Route53Changes() []route53types.Change {
ret := []route53types.Change{}
for _, c := range cs {
ret = append(ret, c.Change)
}
return ret
}
type zonesListCache struct {
age time.Time
duration time.Duration
zones map[string]*profiledZone
}
// AWSProvider is an implementation of Provider for AWS Route53.
type AWSProvider struct {
provider.BaseProvider
clients map[string]Route53API
dryRun bool
batchChangeSize int
batchChangeSizeBytes int
batchChangeSizeValues int
batchChangeInterval time.Duration
evaluateTargetHealth bool
// only consider hosted zones managing domains ending in this suffix
domainFilter endpoint.DomainFilter
// filter hosted zones by id
zoneIDFilter provider.ZoneIDFilter
// filter hosted zones by type (e.g. private or public)
zoneTypeFilter provider.ZoneTypeFilter
// filter hosted zones by tags
zoneTagFilter provider.ZoneTagFilter
// extend filter for subdomains in the zone (e.g. first.us-east-1.example.com)
zoneMatchParent bool
preferCNAME bool
zonesCache *zonesListCache
// queue for collecting changes to submit them in the next iteration, but after all other changes
failedChangesQueue map[string]Route53Changes
}
// AWSConfig contains configuration to create a new AWS provider.
type AWSConfig struct {
DomainFilter endpoint.DomainFilter
ZoneIDFilter provider.ZoneIDFilter
ZoneTypeFilter provider.ZoneTypeFilter
ZoneTagFilter provider.ZoneTagFilter
ZoneMatchParent bool
BatchChangeSize int
BatchChangeSizeBytes int
BatchChangeSizeValues int
BatchChangeInterval time.Duration
EvaluateTargetHealth bool
PreferCNAME bool
DryRun bool
ZoneCacheDuration time.Duration
}
// NewAWSProvider initializes a new AWS Route53 based Provider.
func NewAWSProvider(awsConfig AWSConfig, clients map[string]Route53API) (*AWSProvider, error) {
provider := &AWSProvider{
clients: clients,
domainFilter: awsConfig.DomainFilter,
zoneIDFilter: awsConfig.ZoneIDFilter,
zoneTypeFilter: awsConfig.ZoneTypeFilter,
zoneTagFilter: awsConfig.ZoneTagFilter,
zoneMatchParent: awsConfig.ZoneMatchParent,
batchChangeSize: awsConfig.BatchChangeSize,
batchChangeSizeBytes: awsConfig.BatchChangeSizeBytes,
batchChangeSizeValues: awsConfig.BatchChangeSizeValues,
batchChangeInterval: awsConfig.BatchChangeInterval,
evaluateTargetHealth: awsConfig.EvaluateTargetHealth,
preferCNAME: awsConfig.PreferCNAME,
dryRun: awsConfig.DryRun,
zonesCache: &zonesListCache{duration: awsConfig.ZoneCacheDuration},
failedChangesQueue: make(map[string]Route53Changes),
}
return provider, nil
}
// Zones returns the list of hosted zones.
func (p *AWSProvider) Zones(ctx context.Context) (map[string]*route53types.HostedZone, error) {
zones, err := p.zones(ctx)
if err != nil {
return nil, err
}
result := make(map[string]*route53types.HostedZone, len(zones))
for id, zone := range zones {
result[id] = zone.zone
}
return result, nil
}
// zones returns the list of zones per AWS profile
func (p *AWSProvider) zones(ctx context.Context) (map[string]*profiledZone, error) {
if p.zonesCache.zones != nil && time.Since(p.zonesCache.age) < p.zonesCache.duration {
log.Debug("Using cached zones list")
return p.zonesCache.zones, nil
}
log.Debug("Refreshing zones list cache")
zones := make(map[string]*profiledZone)
for profile, client := range p.clients {
var tagErr error
paginator := route53.NewListHostedZonesPaginator(client, &route53.ListHostedZonesInput{})
for paginator.HasMorePages() {
resp, err := paginator.NextPage(ctx)
if err != nil {
var te *route53types.ThrottlingException
if errors.As(err, &te) {
log.Infof("Skipping AWS profile %q due to provider side throttling: %v", profile, te.ErrorMessage())
continue
}
// nothing to do here. Falling through to general error handling
return nil, provider.NewSoftError(fmt.Errorf("failed to list hosted zones: %w", err))
}
for _, zone := range resp.HostedZones {
if !p.zoneIDFilter.Match(*zone.Id) {
continue
}
if !p.zoneTypeFilter.Match(zone) {
continue
}
if !p.domainFilter.Match(*zone.Name) {
if !p.zoneMatchParent {
continue
}
if !p.domainFilter.MatchParent(*zone.Name) {
continue
}
}
// Only fetch tags if a tag filter was specified
if !p.zoneTagFilter.IsEmpty() {
tags, err := p.tagsForZone(ctx, *zone.Id, profile)
if err != nil {
tagErr = err
break
}
if !p.zoneTagFilter.Match(tags) {
continue
}
}
zones[*zone.Id] = &profiledZone{
profile: profile,
zone: &zone,
}
}
}
if tagErr != nil {
return nil, provider.NewSoftErrorf("failed to list zones tags: %w", tagErr)
}
}
for _, zone := range zones {
log.Debugf("Considering zone: %s (domain: %s)", *zone.zone.Id, *zone.zone.Name)
}
if p.zonesCache.duration > time.Duration(0) {
p.zonesCache.zones = zones
p.zonesCache.age = time.Now()
}
return zones, nil
}
// wildcardUnescape converts \\052.abc back to *.abc
// Route53 stores wildcards escaped: http://docs.aws.amazon.com/Route53/latest/DeveloperGuide/DomainNameFormat.html?shortFooter=true#domain-name-format-asterisk
func wildcardUnescape(s string) string {
return strings.Replace(s, "\\052", "*", 1)
}
// See https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/DomainNameFormat.html
// convertOctalToAscii decodes inputs that contain octal escape sequences into their original ASCII characters.
// The function returns converted string where any octal escape sequences have been replaced with their corresponding ASCII characters.
func convertOctalToAscii(input string) string {
if !containsOctalSequence(input) {
return input
}
result, err := strconv.Unquote("\"" + input + "\"")
if err != nil {
return input
}
return result
}
// validateDomainName checks if the domain name contains valid octal escape sequences.
func containsOctalSequence(domain string) bool {
// Pattern to match valid octal escape sequences
octalEscapePattern := `\\[0-3][0-7]{2}`
octalEscapeRegex := regexp.MustCompile(octalEscapePattern)
return octalEscapeRegex.MatchString(domain)
}
// Records returns the list of records in a given hosted zone.
func (p *AWSProvider) Records(ctx context.Context) (endpoints []*endpoint.Endpoint, _ error) {
zones, err := p.zones(ctx)
if err != nil {
return nil, provider.NewSoftErrorf("records retrieval failed: %w", err)
}
return p.records(ctx, zones)
}
func (p *AWSProvider) records(ctx context.Context, zones map[string]*profiledZone) ([]*endpoint.Endpoint, error) {
endpoints := make([]*endpoint.Endpoint, 0)
for _, z := range zones {
client := p.clients[z.profile]
paginator := route53.NewListResourceRecordSetsPaginator(client, &route53.ListResourceRecordSetsInput{
HostedZoneId: z.zone.Id,
MaxItems: aws.Int32(route53PageSize),
})
for paginator.HasMorePages() {
resp, err := paginator.NextPage(ctx)
if err != nil {
return nil, provider.NewSoftErrorf("failed to list resource records sets for zone %s using aws profile %q: %w", *z.zone.Id, z.profile, err)
}
for _, r := range resp.ResourceRecordSets {
newEndpoints := make([]*endpoint.Endpoint, 0)
if !p.SupportedRecordType(r.Type) {
continue
}
name := convertOctalToAscii(wildcardUnescape(*r.Name))
var ttl endpoint.TTL
if r.TTL != nil {
ttl = endpoint.TTL(*r.TTL)
}
if len(r.ResourceRecords) > 0 {
targets := make([]string, len(r.ResourceRecords))
for idx, rr := range r.ResourceRecords {
targets[idx] = *rr.Value
}
ep := endpoint.NewEndpointWithTTL(name, string(r.Type), ttl, targets...)
if r.Type == endpoint.RecordTypeCNAME {
ep = ep.WithProviderSpecific(providerSpecificAlias, "false")
}
newEndpoints = append(newEndpoints, ep)
}
if r.AliasTarget != nil {
// Alias records don't have TTLs so provide the default to match the TXT generation
if ttl == 0 {
ttl = recordTTL
}
ep := endpoint.
NewEndpointWithTTL(name, endpoint.RecordTypeA, ttl, *r.AliasTarget.DNSName).
WithProviderSpecific(providerSpecificEvaluateTargetHealth, fmt.Sprintf("%t", r.AliasTarget.EvaluateTargetHealth)).
WithProviderSpecific(providerSpecificAlias, "true")
newEndpoints = append(newEndpoints, ep)
}
for _, ep := range newEndpoints {
if r.SetIdentifier != nil {
ep.SetIdentifier = *r.SetIdentifier
switch {
case r.Weight != nil:
ep.WithProviderSpecific(providerSpecificWeight, fmt.Sprintf("%d", *r.Weight))
case r.Region != "":
ep.WithProviderSpecific(providerSpecificRegion, string(r.Region))
case r.Failover != "":
ep.WithProviderSpecific(providerSpecificFailover, string(r.Failover))
case r.MultiValueAnswer != nil && *r.MultiValueAnswer:
ep.WithProviderSpecific(providerSpecificMultiValueAnswer, "")
case r.GeoLocation != nil:
if r.GeoLocation.ContinentCode != nil {
ep.WithProviderSpecific(providerSpecificGeolocationContinentCode, *r.GeoLocation.ContinentCode)
} else {
if r.GeoLocation.CountryCode != nil {
ep.WithProviderSpecific(providerSpecificGeolocationCountryCode, *r.GeoLocation.CountryCode)
}
if r.GeoLocation.SubdivisionCode != nil {
ep.WithProviderSpecific(providerSpecificGeolocationSubdivisionCode, *r.GeoLocation.SubdivisionCode)
}
}
default:
// one of the above needs to be set, otherwise SetIdentifier doesn't make sense
}
}
if r.HealthCheckId != nil {
ep.WithProviderSpecific(providerSpecificHealthCheckID, *r.HealthCheckId)
}
endpoints = append(endpoints, ep)
}
}
}
}
return endpoints, nil
}
// Identify if old and new endpoints require DELETE/CREATE instead of UPDATE.
func (p *AWSProvider) requiresDeleteCreate(old *endpoint.Endpoint, new *endpoint.Endpoint) bool {
// a change of record type
if old.RecordType != new.RecordType {
return true
}
// an ALIAS record change to/from an A
if old.RecordType == endpoint.RecordTypeA {
oldAlias, _ := old.GetProviderSpecificProperty(providerSpecificAlias)
newAlias, _ := new.GetProviderSpecificProperty(providerSpecificAlias)
if oldAlias != newAlias {
return true
}
}
// a set identifier change
if old.SetIdentifier != new.SetIdentifier {
return true
}
// a change of routing policy
// default to true for geolocation properties if any geolocation property exists in old/new but not the other
for _, propType := range [7]string{providerSpecificWeight, providerSpecificRegion, providerSpecificFailover,
providerSpecificFailover, providerSpecificGeolocationContinentCode, providerSpecificGeolocationCountryCode,
providerSpecificGeolocationSubdivisionCode} {
_, oldPolicy := old.GetProviderSpecificProperty(propType)
_, newPolicy := new.GetProviderSpecificProperty(propType)
if oldPolicy != newPolicy {
return true
}
}
return false
}
func (p *AWSProvider) createUpdateChanges(newEndpoints, oldEndpoints []*endpoint.Endpoint) Route53Changes {
var deletes []*endpoint.Endpoint
var creates []*endpoint.Endpoint
var updates []*endpoint.Endpoint
for i, new := range newEndpoints {
old := oldEndpoints[i]
if p.requiresDeleteCreate(old, new) {
deletes = append(deletes, old)
creates = append(creates, new)
} else {
// Safe to perform an UPSERT.
updates = append(updates, new)
}
}
combined := make(Route53Changes, 0, len(deletes)+len(creates)+len(updates))
combined = append(combined, p.newChanges(route53types.ChangeActionCreate, creates)...)
combined = append(combined, p.newChanges(route53types.ChangeActionUpsert, updates)...)
combined = append(combined, p.newChanges(route53types.ChangeActionDelete, deletes)...)
return combined
}
// GetDomainFilter generates a filter to exclude any domain that is not controlled by the provider
func (p *AWSProvider) GetDomainFilter() endpoint.DomainFilterInterface {
zones, err := p.Zones(context.Background())
if err != nil {
log.Errorf("failed to list zones: %v", err)
return endpoint.DomainFilter{}
}
zoneNames := []string(nil)
for _, z := range zones {
zoneNames = append(zoneNames, *z.Name, "."+*z.Name)
}
log.Infof("Applying provider record filter for domains: %v", zoneNames)
return endpoint.NewDomainFilter(zoneNames)
}
// ApplyChanges applies a given set of changes in a given zone.
func (p *AWSProvider) ApplyChanges(ctx context.Context, changes *plan.Changes) error {
zones, err := p.zones(ctx)
if err != nil {
return provider.NewSoftErrorf("failed to list zones, not applying changes: %w", err)
}
updateChanges := p.createUpdateChanges(changes.UpdateNew, changes.UpdateOld)
combinedChanges := make(Route53Changes, 0, len(changes.Delete)+len(changes.Create)+len(updateChanges))
combinedChanges = append(combinedChanges, p.newChanges(route53types.ChangeActionCreate, changes.Create)...)
combinedChanges = append(combinedChanges, p.newChanges(route53types.ChangeActionDelete, changes.Delete)...)
combinedChanges = append(combinedChanges, updateChanges...)
return p.submitChanges(ctx, combinedChanges, zones)
}
// submitChanges takes a zone and a collection of Changes and sends them as a single transaction.
func (p *AWSProvider) submitChanges(ctx context.Context, changes Route53Changes, zones map[string]*profiledZone) error {
// return early if there is nothing to change
if len(changes) == 0 {
log.Info("All records are already up to date")
return nil
}
// separate into per-zone change sets to be passed to the API.
changesByZone := changesByZone(zones, changes)
if len(changesByZone) == 0 {
log.Info("All records are already up to date, there are no changes for the matching hosted zones")
}
var failedZones []string
for z, cs := range changesByZone {
log := log.WithFields(log.Fields{
"zoneName": *zones[z].zone.Name,
"zoneID": z,
"profile": zones[z].profile,
})
var failedUpdate bool
// group changes into new changes and into changes that failed in a previous iteration and are retried
retriedChanges, newChanges := findChangesInQueue(cs, p.failedChangesQueue[z])
p.failedChangesQueue[z] = nil
batchCs := append(batchChangeSet(newChanges, p.batchChangeSize, p.batchChangeSizeBytes, p.batchChangeSizeValues),
batchChangeSet(retriedChanges, p.batchChangeSize, p.batchChangeSizeBytes, p.batchChangeSizeValues)...)
for i, b := range batchCs {
if len(b) == 0 {
continue
}
for _, c := range b {
log.Infof("Desired change: %s %s %s", c.Action, *c.ResourceRecordSet.Name, c.ResourceRecordSet.Type)
}
if !p.dryRun {
params := &route53.ChangeResourceRecordSetsInput{
HostedZoneId: aws.String(z),
ChangeBatch: &route53types.ChangeBatch{
Changes: b.Route53Changes(),
},
}
successfulChanges := 0
client := p.clients[zones[z].profile]
if _, err := client.ChangeResourceRecordSets(ctx, params); err != nil {
log.Errorf("Failure in zone %s when submitting change batch: %v", *zones[z].zone.Name, err)
changesByOwnership := groupChangesByNameAndOwnershipRelation(b)
if len(changesByOwnership) > 1 {
log.Debug("Trying to submit change sets one-by-one instead")
for _, changes := range changesByOwnership {
for _, c := range changes {
log.Debugf("Desired change: %s %s %s", c.Action, *c.ResourceRecordSet.Name, c.ResourceRecordSet.Type)
}
params.ChangeBatch = &route53types.ChangeBatch{
Changes: changes.Route53Changes(),
}
if _, err := client.ChangeResourceRecordSets(ctx, params); err != nil {
failedUpdate = true
log.Errorf("Failed submitting change (error: %v), it will be retried in a separate change batch in the next iteration", err)
p.failedChangesQueue[z] = append(p.failedChangesQueue[z], changes...)
} else {
successfulChanges = successfulChanges + len(changes)
}
}
} else {
failedUpdate = true
}
} else {
successfulChanges = len(b)
}
if successfulChanges > 0 {
// z is the R53 Hosted Zone ID already as aws.StringValue
log.Infof("%d record(s) were successfully updated", successfulChanges)
}
if i != len(batchCs)-1 {
time.Sleep(p.batchChangeInterval)
}
}
}
if failedUpdate {
failedZones = append(failedZones, z)
}
}
if len(failedZones) > 0 {
return provider.NewSoftErrorf("failed to submit all changes for the following zones: %v", failedZones)
}
return nil
}
// newChanges returns a collection of Changes based on the given records and action.
func (p *AWSProvider) newChanges(action route53types.ChangeAction, endpoints []*endpoint.Endpoint) Route53Changes {
changes := make(Route53Changes, 0, len(endpoints))
for _, endpoint := range endpoints {
change, dualstack := p.newChange(action, endpoint)
changes = append(changes, change)
if dualstack {
// make a copy of change, modify RRS type to AAAA, then add new change
rrs := *change.ResourceRecordSet
change2 := &Route53Change{
Change: route53types.Change{Action: change.Action, ResourceRecordSet: &rrs},
}
change2.ResourceRecordSet.Type = route53types.RRTypeAaaa
changes = append(changes, change2)
}
}
return changes
}
// AdjustEndpoints modifies the provided endpoints (coming from various sources) to match
// the endpoints that the provider returns in `Records` so that the change plan will not have
// unneeded (potentially failing) changes.
// Example: CNAME endpoints pointing to ELBs will have a `alias` provider-specific property
// added to match the endpoints generated from existing alias records in Route53.
func (p *AWSProvider) AdjustEndpoints(endpoints []*endpoint.Endpoint) ([]*endpoint.Endpoint, error) {
for _, ep := range endpoints {
alias := false
if aliasString, ok := ep.GetProviderSpecificProperty(providerSpecificAlias); ok {
alias = aliasString == "true"
if alias {
if ep.RecordType != endpoint.RecordTypeA && ep.RecordType != endpoint.RecordTypeCNAME {
ep.DeleteProviderSpecificProperty(providerSpecificAlias)
}
} else {
if ep.RecordType == endpoint.RecordTypeCNAME {
if aliasString != "false" {
ep.SetProviderSpecificProperty(providerSpecificAlias, "false")
}
} else {
ep.DeleteProviderSpecificProperty(providerSpecificAlias)
}
}
} else if ep.RecordType == endpoint.RecordTypeCNAME {
alias = useAlias(ep, p.preferCNAME)
log.Debugf("Modifying endpoint: %v, setting %s=%v", ep, providerSpecificAlias, alias)
ep.SetProviderSpecificProperty(providerSpecificAlias, strconv.FormatBool(alias))
}
if alias {
ep.RecordType = endpoint.RecordTypeA
if ep.RecordTTL.IsConfigured() {
log.Debugf("Modifying endpoint: %v, setting ttl=%v", ep, recordTTL)
ep.RecordTTL = recordTTL
}
if prop, ok := ep.GetProviderSpecificProperty(providerSpecificEvaluateTargetHealth); ok {
if prop != "true" && prop != "false" {
ep.SetProviderSpecificProperty(providerSpecificEvaluateTargetHealth, "false")
}
} else {
ep.SetProviderSpecificProperty(providerSpecificEvaluateTargetHealth, strconv.FormatBool(p.evaluateTargetHealth))
}
} else {
ep.DeleteProviderSpecificProperty(providerSpecificEvaluateTargetHealth)
}
}
return endpoints, nil
}
// newChange returns a route53 Change and a boolean indicating if there should also be a change to a AAAA record
// returned Change is based on the given record by the given action, e.g.
// action=ChangeActionCreate returns a change for creation of the record and
// action=ChangeActionDelete returns a change for deletion of the record.
func (p *AWSProvider) newChange(action route53types.ChangeAction, ep *endpoint.Endpoint) (*Route53Change, bool) {
change := &Route53Change{
Change: route53types.Change{
Action: action,
ResourceRecordSet: &route53types.ResourceRecordSet{
Name: aws.String(ep.DNSName),
},
},
}
dualstack := false
if targetHostedZone := isAWSAlias(ep); targetHostedZone != "" {
evalTargetHealth := p.evaluateTargetHealth
if prop, ok := ep.GetProviderSpecificProperty(providerSpecificEvaluateTargetHealth); ok {
evalTargetHealth = prop == "true"
}
// If the endpoint has a Dualstack label, append a change for AAAA record as well.
if val, ok := ep.Labels[endpoint.DualstackLabelKey]; ok {
dualstack = val == "true"
}
change.ResourceRecordSet.Type = route53types.RRTypeA
change.ResourceRecordSet.AliasTarget = &route53types.AliasTarget{
DNSName: aws.String(ep.Targets[0]),
HostedZoneId: aws.String(cleanZoneID(targetHostedZone)),
EvaluateTargetHealth: evalTargetHealth,
}
change.sizeBytes += len([]byte(ep.Targets[0]))
change.sizeValues += 1
} else {
change.ResourceRecordSet.Type = route53types.RRType(ep.RecordType)
if !ep.RecordTTL.IsConfigured() {
change.ResourceRecordSet.TTL = aws.Int64(recordTTL)
} else {
change.ResourceRecordSet.TTL = aws.Int64(int64(ep.RecordTTL))
}
change.ResourceRecordSet.ResourceRecords = make([]route53types.ResourceRecord, len(ep.Targets))
for idx, val := range ep.Targets {
change.ResourceRecordSet.ResourceRecords[idx] = route53types.ResourceRecord{
Value: aws.String(val),
}
change.sizeBytes += len([]byte(val))
change.sizeValues += 1
}
}
if action == route53types.ChangeActionUpsert {
// If the value of the Action element is UPSERT, each ResourceRecord element and each character in a Value
// element is counted twice
change.sizeBytes *= 2
change.sizeValues *= 2
}
setIdentifier := ep.SetIdentifier
if setIdentifier != "" {
change.ResourceRecordSet.SetIdentifier = aws.String(setIdentifier)
if prop, ok := ep.GetProviderSpecificProperty(providerSpecificWeight); ok {
weight, err := strconv.ParseInt(prop, 10, 64)
if err != nil {
log.Errorf("Failed parsing value of %s: %s: %v; using weight of 0", providerSpecificWeight, prop, err)
weight = 0
}
change.ResourceRecordSet.Weight = aws.Int64(weight)
}
if prop, ok := ep.GetProviderSpecificProperty(providerSpecificRegion); ok {
change.ResourceRecordSet.Region = route53types.ResourceRecordSetRegion(prop)
}
if prop, ok := ep.GetProviderSpecificProperty(providerSpecificFailover); ok {
change.ResourceRecordSet.Failover = route53types.ResourceRecordSetFailover(prop)
}
if _, ok := ep.GetProviderSpecificProperty(providerSpecificMultiValueAnswer); ok {
change.ResourceRecordSet.MultiValueAnswer = aws.Bool(true)
}
geolocation := &route53types.GeoLocation{}
useGeolocation := false
if prop, ok := ep.GetProviderSpecificProperty(providerSpecificGeolocationContinentCode); ok {
geolocation.ContinentCode = aws.String(prop)
useGeolocation = true
} else {
if prop, ok := ep.GetProviderSpecificProperty(providerSpecificGeolocationCountryCode); ok {
geolocation.CountryCode = aws.String(prop)
useGeolocation = true
}
if prop, ok := ep.GetProviderSpecificProperty(providerSpecificGeolocationSubdivisionCode); ok {
geolocation.SubdivisionCode = aws.String(prop)
useGeolocation = true
}
}
if useGeolocation {
change.ResourceRecordSet.GeoLocation = geolocation
}
}
if prop, ok := ep.GetProviderSpecificProperty(providerSpecificHealthCheckID); ok {
change.ResourceRecordSet.HealthCheckId = aws.String(prop)
}
if ownedRecord, ok := ep.Labels[endpoint.OwnedRecordLabelKey]; ok {
change.OwnedRecord = ownedRecord
}
return change, dualstack
}
// searches for `changes` that are contained in `queue` and returns the `changes` separated by whether they were found in the queue (`foundChanges`) or not (`notFoundChanges`)
func findChangesInQueue(changes Route53Changes, queue Route53Changes) (foundChanges, notFoundChanges Route53Changes) {
if queue == nil {
return Route53Changes{}, changes
}
for _, c := range changes {
found := false
for _, qc := range queue {
if c == qc {
foundChanges = append(foundChanges, c)
found = true
break
}
}
if !found {
notFoundChanges = append(notFoundChanges, c)
}
}
return
}
// group the given changes by name and ownership relation to ensure these are always submitted in the same transaction to Route53;
// grouping by name is done to always submit changes with the same name but different set identifier together,
// grouping by ownership relation is done to always submit changes of records and e.g. their corresponding TXT registry records together
func groupChangesByNameAndOwnershipRelation(cs Route53Changes) map[string]Route53Changes {
changesByOwnership := make(map[string]Route53Changes)
for _, v := range cs {
key := v.OwnedRecord
if key == "" {
key = *v.ResourceRecordSet.Name
}
changesByOwnership[key] = append(changesByOwnership[key], v)
}
return changesByOwnership
}
func (p *AWSProvider) tagsForZone(ctx context.Context, zoneID string, profile string) (map[string]string, error) {
client := p.clients[profile]
// TODO: this will make single API request for each zone, which consumes API requests
// more effective way is to batch requests https://github.com/aws/aws-sdk-go-v2/blob/ed8a3caa0df9ce36a5b60aebeee201187098d205/service/route53/api_op_ListTagsForResources.go#L37
response, err := client.ListTagsForResource(ctx, &route53.ListTagsForResourceInput{
ResourceType: route53types.TagResourceTypeHostedzone,
ResourceId: aws.String(cleanZoneID(zoneID)),
})
if err != nil {
return nil, provider.NewSoftErrorf("failed to list tags for zone %s: %w", zoneID, err)
}
tagMap := map[string]string{}
for _, tag := range response.ResourceTagSet.Tags {
tagMap[*tag.Key] = *tag.Value
}
return tagMap, nil
}
// count bytes for all changes values
func countChangeBytes(cs Route53Changes) int {
count := 0
for _, c := range cs {
count += c.sizeBytes
}
return count
}
// count total value count for all changes
func countChangeValues(cs Route53Changes) int {
count := 0
for _, c := range cs {
count += c.sizeValues
}
return count
}
func batchChangeSet(cs Route53Changes, batchSize int, batchSizeBytes int, batchSizeValues int) []Route53Changes {
if len(cs) <= batchSize && countChangeBytes(cs) <= batchSizeBytes && countChangeValues(cs) <= batchSizeValues {
res := sortChangesByActionNameType(cs)
return []Route53Changes{res}
}
batchChanges := make([]Route53Changes, 0)
changesByOwnership := groupChangesByNameAndOwnershipRelation(cs)
names := make([]string, 0)
for v := range changesByOwnership {
names = append(names, v)
}
sort.Strings(names)
currentBatch := Route53Changes{}
for k, name := range names {
v := changesByOwnership[name]
vBytes := countChangeBytes(v)
vValues := countChangeValues(v)