rds/instance: Fix create returns unready instances

[johanneswuerbach]

Description

The RDS instance identifier argument is optional and might be empty when identifier_prefix is used. Using the identifier variable ensures that the same name is polled, that is also used when creating the instance.

Relations

Closes #32179.
Closes #31594.

References

Output from Acceptance Testing

$ make testacc TESTS=TestAccRDSInstance PKG=rds

...

[github-actions]

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[github-actions]

Welcome @johanneswuerbach 👋

It looks like this is your first Pull Request submission to the Terraform AWS Provider! If you haven’t already done so please make sure you have checked out our CONTRIBUTOR guide and FAQ to make sure your contribution is adhering to best practice and has all the necessary elements in place for a successful approval.

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Thanks again, and welcome to the community! 😃

[ewbankkit]

LGTM 🚀.

% make testacc TESTARGS='-run=TestAccRDSInstance_identifierPrefix\|TestAccRDSInstance_identifierGenerated\|TestAccRDSInstance_basic$$' PKG=rds
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/rds/... -v -count 1 -parallel 20  -run=TestAccRDSInstance_identifierPrefix\|TestAccRDSInstance_identifierGenerated\|TestAccRDSInstance_basic$ -timeout 180m
=== RUN   TestAccRDSInstance_basic
=== PAUSE TestAccRDSInstance_basic
=== RUN   TestAccRDSInstance_identifierPrefix
=== PAUSE TestAccRDSInstance_identifierPrefix
=== RUN   TestAccRDSInstance_identifierGenerated
=== PAUSE TestAccRDSInstance_identifierGenerated
=== CONT  TestAccRDSInstance_basic
=== CONT  TestAccRDSInstance_identifierGenerated
=== CONT  TestAccRDSInstance_identifierPrefix
--- PASS: TestAccRDSInstance_basic (501.94s)
--- PASS: TestAccRDSInstance_identifierGenerated (541.48s)
--- PASS: TestAccRDSInstance_identifierPrefix (543.93s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/rds	549.519s

[ewbankkit]

@johanneswuerbach Thanks for the contribution 🎉 👏.

[github-actions]

This functionality has been released in v5.6.0 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!

[ajax-koval-i]

this error fixed in "terraform-aws-modules/rds/aws" with 5.6.0 version ?

[johanneswuerbach]

Yes 👍

[github-actions]

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