aws_launch_template Tag on create values cannot be empty

[benwj]

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Terraform Version

Terraform: 11.7
AWS Provider: 2.40

Affected Resource(s)

• aws_launch_template

Terraform Configuration Files

resource "aws_launch_template" "kube-submaster-lt" {
  count         = "${length(var.aws_kube_subnets)}"
  name_prefix   = "${var.kube_cluster_name}-kube-master_${local.environment_name}-${var.kube_type}"
  ebs_optimized = true
  image_id      = "${local.ami}"

  #instance_initiated_shutdown_behavior = "terminate"
  instance_type = "${var.mixed_instance_types[0]}"
  key_name      = "${var.key_name}"

  lifecycle {
    create_before_destroy = true
    ignore_changes        = ["block_device_mappings"]
  }

  block_device_mappings {
    device_name = "/dev/sdi"

    ebs {
      volume_type           = "gp2"
      volume_size           = "${var.kubelet_vol_size}"
      delete_on_termination = true
      encrypted             = true
    }
  }

  block_device_mappings {
    device_name = "/dev/xvda"

    ebs {
      delete_on_termination = true
      volume_size           = "50"
      encrypted             = ""
      volume_type           = "gp2"
    }
  }

  iam_instance_profile {
    name = "${aws_iam_instance_profile.kubemaster_instance_profile.name}"
  }

  monitoring {
    enabled = true
  }

  placement {
    tenancy = "${var.placement_tenancy}"

    #group_name = "${aws_placement_group.launch_template_placement.*.id[count.index]}"
  }
  vpc_security_group_ids = ["${aws_security_group.kubecluster.id}", "${var.aws_ssh_security_groups}", "${aws_security_group.kube_master_lb_sg.id}"]

  user_data = "${base64encode(data.template_file.ignition_sub.rendered)}"
  tags      = "${local.common_tags}"

  tag_specifications {
    resource_type = "volume"
    tags          = "${local.common_tags}"
  }
}

locals {
  common_tags = "${merge(map(
        "kubernetes.io/cluster/${var.kube_cluster_name}", "owned",
        "KubeClusterId" , "${var.kube_cluster_id}${var.cluster_swap}",
        "KubeEnv" , "${var.kube_env}",
        "KubeType" , "${var.kube_type }",
        "Name" , "${var.kube_cluster_name}-kube-master-${local.environment_name}${var.cluster_swap}",),
      "${var.tags}")}"
}

Expected Behavior

Launch Template is created successfully

Actual Behavior

Error: Error applying plan:

3 error(s) occurred:

* module.kube-controlplane.aws_launch_template.kube-submaster-lt[0]: 1 error(s) occurred:

* aws_launch_template.kube-submaster-lt.0: InvalidParameterValue: Tag keys and tag values cannot be empty. Ensure that each tag has a key and value pair and try again.
	status code: 400, request id: df0d8920-eb70-4de9-ae39-6f4a0f53d19e
* module.kube-controlplane.aws_launch_template.kube-submaster-lt[1]: 1 error(s) occurred:

* aws_launch_template.kube-submaster-lt.1: InvalidParameterValue: Tag keys and tag values cannot be empty. Ensure that each tag has a key and value pair and try again.
	status code: 400, request id: 62f93d67-6462-46d9-b56d-7df5b0ffbf32
* module.kube-controlplane.aws_launch_template.kube-submaster-lt[2]: 1 error(s) occurred:

* aws_launch_template.kube-submaster-lt.2: InvalidParameterValue: Tag keys and tag values cannot be empty. Ensure that each tag has a key and value pair and try again.
	status code: 400, request id: 602537fd-2de5-4ab2-b8f4-c84dd4f4eb8b

Steps to Reproduce

Create a launch template with empty tag values

Important Factoids

The same code works in version 2.23 of the provider and fails in 2.40