[Bug]: aws_route53_record fails when ttl is set to 0

[danielmotaleite]

Terraform Core Version

v1.4.6

AWS Provider Version

v5.40.0

Affected Resource(s)

aws_route53_record

Expected Behavior

When ttl = 0 (zero), the resource should be created, just in line as the AWS route53 console

Actual Behavior

Error, no resource created, while the plan show OK
Can't recreate via terraform a record created manually in the AWS console

Relevant Error/Panic Output Snippet

Error: creating Route 53 Record: InvalidInput: Invalid request: Expected exactly one of [AliasTarget, all of [TTL, and ResourceRecords], or TrafficPolicyInstanceId], but found none in Change with [Action=UPSERT, Name=replica-1.example.com, Type=CNAME, SetIdentifier=replica-1]

Terraform Configuration Files

  resource "aws_route53_record" "this" {
       allow_overwrite = true
       name            = "replica-1.example.com"
       records         = [
           "staging-1.zzzzzzz.rds.amazonaws.com",
        ]
       set_identifier  = "replica-1"
       ttl             = 0
       type            = "CNAME"
       zone_id         = "XXXX"
    }

Steps to Reproduce

Create the tf to create a route53 record, with TTL = 0
try to apply the terraform
it should fail.
change the TTL> 0
apply the terraform
it should work now

Debug Output

No response

Panic Output

No response

Important Factoids

The AWS console didn't allow TTL in the past, but now it do allows and TTL= 0 is usefull for internal zones, as a weak load balancer, namely for RDS replica with healthchecks (route53_healthchecks), to add or remove replicas based on several checks. For that, we do not want cached results, as that may negate the healtcheck objective

References

No response

Would you like to implement a fix?

No

[github-actions]

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[hugo-barros]

I went to tackle this one (as I was looking for a simple issue to be my first contribution), but my acceptance test didn't pass (with same error). I wonder whether it is possible to achieve this without the plugin framework? (Instead of sdkv2).

[danielmotaleite]

@hugo-barros thank you for your effort
@justinretzolk any change of helping hugo in this problem

[danielmotaleite]

just to add that this makes usage of weighted DNS extremely annoying, as it force me to manual change the ttl from zero to 1 to add any new entry, and them manually reset them back to zero

│ Error: creating Route 53 Record: InvalidChangeBatch: [RRSet with DNS name readreplica-amc.staging.internal., type CNAME, SetIdentifier readreplica-amc-4 cannot be created as weighted sets must contain the same TTL., RRSet with DNS name readreplica-amc.staging.internal., type CNAME, SetIdentifier readreplica-amc-4 cannot be created as weighted sets must contain the same TTL.]

[danielmotaleite]

i upgraded to v5.70. and this still exists in the latest version

[github-actions]

Warning

This issue has been closed, meaning that any additional comments are hard for our team to see. Please assume that the maintainers will not see them.

Ongoing conversations amongst community members are welcome, however, the issue will be locked after 30 days. Moving conversations to another venue, such as the AWS Provider forum, is recommended. If you have additional concerns, please open a new issue, referencing this one where needed.

[github-actions]

This functionality has been released in v5.73.0 of the Terraform AWS Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[danielmotaleite]

confirmed fixed with 5.73.0, i can create/update records with TTL=0

[github-actions]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.
If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.