terraform-aws-eks/data.tf

data "aws_iam_policy_document" "workers_assume_role_policy" {
  statement {
    sid = "EKSWorkerAssumeRole"

    actions = [
      "sts:AssumeRole",
    ]

    principals {
      type        = "Service"
      identifiers = [local.ec2_principal]
    }
  }
}

data "aws_ami" "eks_worker" {
  filter {
    name   = "name"
    values = [local.worker_ami_name_filter]
  }

  most_recent = true

  owners = [var.worker_ami_owner_id]
}

data "aws_ami" "eks_worker_windows" {
  filter {
    name   = "name"
    values = [local.worker_ami_name_filter_windows]
  }

  filter {
    name   = "platform"
    values = ["windows"]
  }

  most_recent = true

  owners = [var.worker_ami_owner_id_windows]
}

data "aws_iam_policy_document" "cluster_assume_role_policy" {
  statement {
    sid = "EKSClusterAssumeRole"

    actions = [
      "sts:AssumeRole",
    ]

    principals {
      type        = "Service"
      identifiers = ["eks.amazonaws.com"]
    }
  }
}

data "template_file" "userdata" {
  count = var.create_eks ? local.worker_group_count : 0
  template = lookup(
    var.worker_groups[count.index],
    "userdata_template_file",
    file(
      lookup(var.worker_groups[count.index], "platform", local.workers_group_defaults["platform"]) == "windows"
      ? "${path.module}/templates/userdata_windows.tpl"
      : "${path.module}/templates/userdata.sh.tpl"
    )
  )

  vars = merge({
    platform            = lookup(var.worker_groups[count.index], "platform", local.workers_group_defaults["platform"])
    cluster_name        = coalescelist(aws_eks_cluster.this[*].name, [""])[0]
    endpoint            = coalescelist(aws_eks_cluster.this[*].endpoint, [""])[0]
    cluster_auth_base64 = coalescelist(aws_eks_cluster.this[*].certificate_authority[0].data, [""])[0]
    pre_userdata = lookup(
      var.worker_groups[count.index],
      "pre_userdata",
      local.workers_group_defaults["pre_userdata"],
    )
    additional_userdata = lookup(
      var.worker_groups[count.index],
      "additional_userdata",
      local.workers_group_defaults["additional_userdata"],
    )
    bootstrap_extra_args = lookup(
      var.worker_groups[count.index],
      "bootstrap_extra_args",
      local.workers_group_defaults["bootstrap_extra_args"],
    )
    kubelet_extra_args = lookup(
      var.worker_groups[count.index],
      "kubelet_extra_args",
      local.workers_group_defaults["kubelet_extra_args"],
    )
    },
    lookup(
      var.worker_groups[count.index],
      "userdata_template_extra_args",
      local.workers_group_defaults["userdata_template_extra_args"]
    )
  )
}

data "template_file" "launch_template_userdata" {
  count = var.create_eks ? local.worker_group_launch_template_count : 0
  template = lookup(
    var.worker_groups_launch_template[count.index],
    "userdata_template_file",
    file(
      lookup(var.worker_groups_launch_template[count.index], "platform", local.workers_group_defaults["platform"]) == "windows"
      ? "${path.module}/templates/userdata_windows.tpl"
      : "${path.module}/templates/userdata.sh.tpl"
    )
  )

  vars = merge({
    platform            = lookup(var.worker_groups_launch_template[count.index], "platform", local.workers_group_defaults["platform"])
    cluster_name        = coalescelist(aws_eks_cluster.this[*].name, [""])[0]
    endpoint            = coalescelist(aws_eks_cluster.this[*].endpoint, [""])[0]
    cluster_auth_base64 = coalescelist(aws_eks_cluster.this[*].certificate_authority[0].data, [""])[0]
    pre_userdata = lookup(
      var.worker_groups_launch_template[count.index],
      "pre_userdata",
      local.workers_group_defaults["pre_userdata"],
    )
    additional_userdata = lookup(
      var.worker_groups_launch_template[count.index],
      "additional_userdata",
      local.workers_group_defaults["additional_userdata"],
    )
    bootstrap_extra_args = lookup(
      var.worker_groups_launch_template[count.index],
      "bootstrap_extra_args",
      local.workers_group_defaults["bootstrap_extra_args"],
    )
    kubelet_extra_args = lookup(
      var.worker_groups_launch_template[count.index],
      "kubelet_extra_args",
      local.workers_group_defaults["kubelet_extra_args"],
    )
    },
    lookup(
      var.worker_groups_launch_template[count.index],
      "userdata_template_extra_args",
      local.workers_group_defaults["userdata_template_extra_args"]
    )
  )
}

data "aws_iam_role" "custom_cluster_iam_role" {
  count = var.manage_cluster_iam_resources ? 0 : 1
  name  = var.cluster_iam_role_name
}

data "aws_iam_instance_profile" "custom_worker_group_iam_instance_profile" {
  count = var.manage_worker_iam_resources ? 0 : local.worker_group_count
  name = lookup(
    var.worker_groups[count.index],
    "iam_instance_profile_name",
    local.workers_group_defaults["iam_instance_profile_name"],
  )
}

data "aws_iam_instance_profile" "custom_worker_group_launch_template_iam_instance_profile" {
  count = var.manage_worker_iam_resources ? 0 : local.worker_group_launch_template_count
  name = lookup(
    var.worker_groups_launch_template[count.index],
    "iam_instance_profile_name",
    local.workers_group_defaults["iam_instance_profile_name"],
  )
}

data "aws_partition" "current" {}