[Bug]: aws_ecs_task_definition improperly changes the first character of labels to lowercase when specified in dockerLabels in the container definition

[mvallim]

Terraform Core Version

1.5.7

AWS Provider Version

5.61.0

Affected Resource(s)

• aws_ecs_task_definition (container definition)

Expected Behavior

When I specify the labels in the container definition using aws_ecs_task_definition, it is expected that the provider does not alter the label.

resource "aws_ecs_task_definition" "task_definition_default" {
  ...
  container_definitions = jsonencode({
    dockerLabels = {
      "PROMETHEUS_TARGET"            = "true"
      "PROMETHEUS_EXPORTER_PORT"     = "12345"
      "PROMETHEUS_EXPORTER_PATH"     = "/prometheus"
      "PROMETHEUS_EXPORTER_JOB_NAME" = "my-job"
    }
  })
  ...
}

Actual Behavior

After applying, I observe that the container definition of the task is changed to:

...
  "stopTimeout": 120,
  "dockerLabels": {
      "pROMETHEUS_TARGET": "true",
      "pROMETHEUS_EXPORTER_PORT": "12345",
      "pROMETHEUS_EXPORTER_PATH": "/prometheus",
      "pROMETHEUS_EXPORTER_JOB_NAME": "my-job"
  }
...

Relevant Error/Panic Output Snippet

No response

Terraform Configuration Files

resource "aws_ecs_task_definition" "task_definition_default" {
  ...
  container_definitions = jsonencode({
    dockerLabels = {
      "PROMETHEUS_TARGET"            = "true"
      "PROMETHEUS_EXPORTER_PORT"     = "12345"
      "PROMETHEUS_EXPORTER_PATH"     = "/prometheus"
      "PROMETHEUS_EXPORTER_JOB_NAME" = "my-job"
    }
  })
  ...
}

Steps to Reproduce

Using labels on dockerLabels

resource "aws_ecs_task_definition" "task_definition_default" {
  ...
  container_definitions = jsonencode({
    dockerLabels = {
      "PROMETHEUS_TARGET"            = "true"
      "PROMETHEUS_EXPORTER_PORT"     = "12345"
      "PROMETHEUS_EXPORTER_PATH"     = "/prometheus"
      "PROMETHEUS_EXPORTER_JOB_NAME" = "my-job"
    }
  })
  ...
}

Debug Output

No response

Panic Output

No response

Important Factoids

No response

References

No response

Would you like to implement a fix?

No

[github-actions]

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[ewbankkit]

Relates #38543.
Relates #38622.
Relates #38380.
Relates #38016.

[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 v5.63.0 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!

[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.