ingressClassName alb does not set aws-weight #5775
Description
What happened:
created an ingress with aws-weight
What you expected to happen:
a SIMPLE record was created
How to reproduce it (as minimally and precisely as possible):
kind: Ingress
apiVersion: networking.k8s.io/v1
metadata:
annotations:
alb.ingress.kubernetes.io/certificate-arn: arn:aws:acm:us-east-1:123456789:certificate/xpto,arn:aws:acm:us-east-1:123456789:certificate/xpto
alb.ingress.kubernetes.io/group.name: public
alb.ingress.kubernetes.io/healthcheck-path: /
alb.ingress.kubernetes.io/load-balancer-attributes: access_logs.s3.enabled=true,access_logs.s3.bucket=logs
alb.ingress.kubernetes.io/load-balancer-name: pub-app
alb.ingress.kubernetes.io/scheme: internal
alb.ingress.kubernetes.io/ssl-policy: ELBSecurityPolicy-TLS13-1-2-Res-2021-06
alb.ingress.kubernetes.io/subnets: subnet-1234567
alb.ingress.kubernetes.io/target-type: ip
service.beta.kubernetes.io/aws-load-balancer-target-group-attributes: preserve_client_ip.enabled=true
external-dns.alpha.kubernetes.io/aws-weight: "200"
finalizers:
- group.ingress.k8s.aws/public
spec:
ingressClassName: alb
rules:
- host: fernando.test.example.com
http:
paths:
- path: /
pathType: Prefix
backend:
service:
name: http-test-application
port:
number: 80
status:
loadBalancer:
ingress:
- hostname: internal-app-123456789.us-east-1.elb.amazonaws.comtime="2025-08-28T11:54:17Z" level=debug msg="Endpoints generated from ingress: application-alpha/application-alpha-cts-alpha-ue1-39: [fernando.test.example.com 0 IN CNAME internal-app-123456789.us-east-1.elb.amazonaws.com [{aws/weight 200}]]"
time="2025-08-28T11:54:17Z" level=debug msg="Modifying endpoint: fernando.test.example.com 0 IN CNAME internal-app-123456789.us-east-1.elb.amazonaws.com [{aws/weight 200}], setting alias=true"
time="2025-08-28T11:54:17Z" level=debug msg="Adding fernando.test.example.com. to zone test.example.com. [Id: /hostedzone/123456789]"
time="2025-08-28T11:54:17Z" level=debug msg="Adding _externaldns.cname-fernando.test.example.com. to zone test.example.com. [Id: /hostedzone/123456789]"
time="2025-08-28T11:54:17Z" level=info msg="Desired change: CREATE _externaldns.cname-fernando.test.example.com TXT" profile=default zoneID=/hostedzone/123456789 zoneName=test.example.com.
time="2025-08-28T11:54:17Z" level=info msg="Desired change: CREATE fernando.test.example.com A" profile=default zoneID=/hostedzone/123456789 zoneName=test.example.com.
-----
time="2025-08-28T11:55:18Z" level=debug msg="Endpoints generated from ingress: application-alpha/application-alpha-cts-alpha-ue1-39: [fernando.test.example.com 0 IN CNAME [{aws/weight 200}]]"
time="2025-08-28T11:55:18Z" level=debug msg="Modifying endpoint: fernando.test.example.com 0 IN CNAME internal-app-123456789.us-east-1.elb.amazonaws.com [{aws/weight 200}], setting alias=true"
time="2025-08-28T11:55:18Z" level=debug msg="Adding fernando.test.example.com. to zone test.example.com. [Id: /hostedzone/123456789]"
time="2025-08-28T11:55:18Z" level=debug msg="Adding _externaldns.cname-fernando.test.example.com. to zone test.example.com. [Id: /hostedzone/123456789]"
time="2025-08-28T11:55:18Z" level=debug msg="Adding fernando.test.example.com. to zone test.example.com. [Id: /hostedzone/123456789]"
time="2025-08-28T11:55:18Z" level=debug msg="Adding _externaldns.cname-fernando.test.example.com. to zone test.example.com. [Id: /hostedzone/123456789]"
time="2025-08-28T11:55:18Z" level=info msg="Desired change: DELETE _externaldns.cname-fernando.test.example.com TXT" profile=default zoneID=/hostedzone/123456789 zoneName=test.example.com.
time="2025-08-28T11:55:18Z" level=info msg="Desired change: DELETE fernando.test.example.com A" profile=default zoneID=/hostedzone/123456789 zoneName=test.example.com.
time="2025-08-28T11:55:18Z" level=info msg="Desired change: CREATE _externaldns.cname-fernando.test.example.com TXT" profile=default zoneID=/hostedzone/123456789 zoneName=test.example.com.
time="2025-08-28T11:55:18Z" level=info msg="Desired change: CREATE fernando.test.example.com A" profile=default zoneID=/hostedzone/123456789 zoneName=test.example.com.
after the initial creation of the A record with Simple Routing policy, every 30 sec, eDNS will delete the record and recreate it again, cause it does not match the expected routing policy.
Anything else we need to know?:
when using ingressClassName: nginx this works fine. but for ingressClassName: alb, we see this issue.
Environment:
- External-DNS version (use
external-dns --version): app.kubernetes.io/version: 0.18.0 - DNS provider: aws route 53
- Others: K8s Rev: v1.31.10-eks-931bdca
spec:
containers:
- name: external-dns
image: registry.k8s.io/external-dns/external-dns:v0.18.0
args:
- --log-level=debug
- --log-format=text
- --interval=1m
- --source=service
- --source=ingress
- --policy=sync
- --registry=txt
- --txt-owner-id=alpha-ue1
- --txt-prefix=_externaldns.
- --managed-record-types=A
- --managed-record-types=CNAME
- --managed-record-types=TXT
- --provider=aws
- --zone-id-filter=123456789
- --zone-id-filter=987654321
- --zone-id-filter=123498765