Random ordered_placement_strategy

[ghost]

This issue was originally opened by @Scherkan as hashicorp/terraform#18565. It was migrated here as a result of the provider split. The original body of the issue is below.

---

I can't attach random placement strategy to aws_ecs_service, according to:
https://www.terraform.io/docs/providers/aws/r/ecs_service.html#ordered_placement_strategy

Terraform Version

Terraform v0.11.7

• provider.aws v1.29.0
• provider.template v1.0.0

...

Terraform Configuration Files

resource "aws_ecs_service" "service" {
  name = "service"
  task_definition = "...."
  health_check_grace_period_seconds = 300
  cluster = "..."
  desired_count = 0
  launch_type = "EC2"

  load_balancer {
    target_group_arn = "..."
    container_name = "..."
    container_port = 8888
  }

  ordered_placement_strategy {
    type  = "spread"
    field = "attribute:ecs.availability-zone"
  }
  ordered_placement_strategy {
    type  = "spread"
    field = "instanceId"
  }

  ordered_placement_strategy {
    type = "random"
  }
  depends_on = ["aws_lb.internal"]
}
...

Debug Output

Crash Output

aws_ecs_service.config-server-service: Creating...
cluster: "" => "arn:aws:ecs:eu-west-2::cluster/cluster"
deployment_maximum_percent: "" => "200"
deployment_minimum_healthy_percent: "" => "100"
desired_count: "" => "0"
health_check_grace_period_seconds: "" => "300"
iam_role: "" => ""
launch_type: "" => "EC2"
load_balancer.#: "" => "1"
load_balancer..container_name: "" => "docker"
load_balancer..container_port: "" => "8888"
load_balancer..elb_name: "" => ""
load_balancer..target_group_arn: "" => "arn*..."
name: "" => "service"
ordered_placement_strategy.#: "" => "3"
ordered_placement_strategy.0.field: "" => "attribute:ecs.availability-zone"
ordered_placement_strategy.0.type: "" => "spread"
ordered_placement_strategy.1.field: "" => "instanceId"
ordered_placement_strategy.1.type: "" => "spread"
ordered_placement_strategy.2.type: "" => "random"
scheduling_strategy: "" => "REPLICA"
task_definition: "" => "arn:aws:****"

Error: Error applying plan:

1 error(s) occurred:

• aws_ecs_service.config-server-service: 1 error(s) occurred:

• aws_ecs_service.config-server-service: InvalidParameterException: random field should not be specified.
  status code: 400, request id: 5fb108e7........................ "service"

Expected Behavior

Created ECS service, with correct placement strategy:

• first AZ
• second instanceID
• random

Actual Behavior

Fail during apply script.

Steps to Reproduce

1. terraform init
2. terraform apply

Additional Context

[jnjackins]

The problem is that the provider is sending the field parameter as an empty string, instead of omitting it.

2018-10-16T17:32:48.450Z [DEBUG] plugin.terraform-provider-aws_v1.36.0_x4: 2018/10/16 17:32:48 [DEBUG] Creating ECS service: {
...
2018-10-16T17:32:48.450Z [DEBUG] plugin.terraform-provider-aws_v1.36.0_x4:   PlacementStrategy: [{
2018-10-16T17:32:48.450Z [DEBUG] plugin.terraform-provider-aws_v1.36.0_x4:       Field: "",
2018-10-16T17:32:48.450Z [DEBUG] plugin.terraform-provider-aws_v1.36.0_x4:       Type: "random"
2018-10-16T17:32:48.450Z [DEBUG] plugin.terraform-provider-aws_v1.36.0_x4:     }],
...

2018/10/16 17:32:48 [DEBUG] [aws-sdk-go] {"__type":"InvalidParameterException","message":"random field should not be specified."}

Relevant tf code:

ordered_placement_strategy = [
    {
        type = "random"
    }
]

[bflad]

The fix for this has been merged and will release with version 1.41.0 of the AWS provider, later today. 👍

[bflad]

This has been released in version 1.41.0 of the AWS provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

[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!