data.aws_ecs_service should return running task definition revision

[joeig]

I deploy new Docker containers to ECS using one task definition per container release (this is usually invoked by a CI job). Since aws_ecs_service requires a valid task definition name containing the revision ID, which is increased by the CI job, it is not possible to dynamically adapt the aws_ecs_service resource to the latest running task definition.

Wouldn't it be awesome if there was a data source for aws_ecs_service which is able to detect the running task definition revision?

data "aws_ecs_service" "running_voting" {
  cluster_name = "mycluster"
  service_name = "voting"
}

resource "aws_ecs_service" "voting" {
  name            = "voting"
  task_definition = "${data.aws_ecs_service.running_voting.arn}"
  desired_count   = 3
}

Terraform v0.10.4

[joeig]

One possible solution is to use aws_ecs_task_definition for that, but this just returns the latest active revision and not the actually running revision.

[bflad]

The new aws_ecs_service data source has been merged and will release with version 1.22.0 of the AWS provider, likely sometime middle of next week.

[bflad]

This has been released in version 1.22.0 of the AWS provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

[n1te1337]

Isn't this essentially creating a circular dependency and prohibits the service from being created in the first place?

[ghost]

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 feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. Thanks!