f5-declarative-onboarding error 422

Recieving the following error when trying to deploy an AWS BIGIP instance using a Terraform templatefile() function to pass variables to cloud-init template file, 

tmos_do_only_wait - DEBUG - f5-declarative-onboarding error 422 - {u'message': u'request failed with null exception', u'code': 422, u'referer': u'Unknown', u'restOperationId': 6674184, u'kind': u':resterrorresponse'}

This errors occurs after the icontrollx packages (DO, AS3) are installed. When I use static values along with the file() function in the user_data argument the BIGIP has no issues accepting the configuration. I've verified my configs and compared it to examples provided in github.com/F5Networks/terraform-aws-bigip-module with no success. 

Code below

~variables.tf~
variable "name_servers" { default = "" }
variable "ltm_eth0_sg_id" { default = "" }
variable "ltm_eth0_subnet_id" { default = "" }
variable "ltm_eth0_subnet_cidr_block" { default = "" }
variable "ltm_eth1_sg_id" { default = "" }
variable "ltm_eth1_subnet_id" { default = "" }
variable "ltm_eth1_subnet_cidr_block" { default = "" }
variable "ltm_eth2_sg_id" { default = "" }
variable "ltm_eth2_subnet_id" { default = "" }
variable "ltm_eth2_subnet_cidr_block" { default = "" }
variable "ltm_eth3_sg_id" { default = "" }
variable "ltm_eth3_subnet_id" { default = "" }
variable "ltm_eth3_subnet_cidr_block" { default = "" }
variable "ltm_eth4_sg_id" { default = "" }
variable "ltm_eth4_subnet_id" { default = "" }
variable "ltm_eth4_subnet_cidr_block" { default = "" }
variable "ltm_eth5_sg_id" { default = "" }
variable "ltm_eth5_subnet_id" { default = "" }
variable "ltm_eth5_subnet_cidr_block" { default = "" }
variable "ltm_eth6_sg_id" { default = "" }
variable "ltm_eth6_subnet_id" { default = "" }
variable "ltm_eth6_subnet_cidr_block" { default = "" }
variable "ltm_eth7_sg_id" { default = "" }
variable "ltm_eth7_subnet_id" { default = "" }
variable "ltm_eth7_subnet_cidr_block" { default = "" }
variable "ltm2_eth0_intf_ip" { default = "" }
variable "ltm2_eth1_intf_ip" { default = "" }
variable "ltm2_eth2_intf_ip" { default = "" }
variable "ltm2_eth3_intf_ip" { default = "" }
variable "ltm2_eth4_intf_ip" { default = "" }
variable "ltm2_eth5_intf_ip" { default = "" }
variable "ltm2_eth6_intf_ip" { default = "" }
variable "ltm2_eth7_intf_ip" { default = "" }

~main.tf~
  module "ltm" {
  name_servers                   = ["169.254.169.253", "8.8.8.8"]
  ltm_eth0_sg_id                 = module.security_groups.ltm_mgmt_security_group_id
  ltm_eth0_subnet_id             = module.subnet.ltm_gtm_mgmt_subnet_id
  ltm_eth0_subnet_cidr_block     = module.subnet.ltm_gtm_mgmt_subnet_cidr_block
  ltm_eth1_sg_id                 = module.security_groups.ltm_routing_security_group_id
  ltm_eth1_subnet_id             = module.subnet.ltm_gtm_routing_subnet_id
  ltm_eth1_subnet_cidr_block     = module.subnet.ltm_gtm_routing_subnet_cidr_block
  ltm_eth2_sg_id                 = module.security_groups.ltm_external_security_group_id
  ltm_eth2_subnet_id             = module.subnet.ltm_ext_vip1_subnet_id
  ltm_eth2_subnet_cidr_block     = module.subnet.ltm_ext_vip1_subnet_cidr_block
  ltm_eth3_sg_id                 = module.security_groups.ltm_external_security_group_id
  ltm_eth3_subnet_id             = module.subnet.ltm_ext_vip2_subnet_id
  ltm_eth3_subnet_cidr_block     = module.subnet.ltm_ext_vip2_subnet_cidr_block
  ltm_eth4_sg_id                 = module.security_groups.ltm_external_security_group_id
  ltm_eth4_subnet_id             = module.subnet.ltm_ext_vip3_subnet_id
  ltm_eth4_subnet_cidr_block     = module.subnet.ltm_ext_vip3_subnet_cidr_block
  ltm_eth5_sg_id                 = module.security_groups.ltm_internal_security_group_id
  ltm_eth5_subnet_id             = module.subnet.ltm_int_vip1_subnet_id
  ltm_eth5_subnet_cidr_block     = module.subnet.ltm_int_vip1_subnet_cidr_block
  ltm_eth6_sg_id                 = module.security_groups.ltm_internal_security_group_id
  ltm_eth6_subnet_id             = module.subnet.ltm_int_vip2_subnet_id
  ltm_eth6_subnet_cidr_block     = module.subnet.ltm_int_vip2_subnet_cidr_block
  ltm_eth7_sg_id                 = module.security_groups.ltm_internal_security_group_id
  ltm_eth7_subnet_id             = module.subnet.ltm_int_vip3_subnet_id
  ltm_eth7_subnet_cidr_block     = module.subnet.ltm_int_vip3_subnet_cidr_block
  ltm2_eth0_intf_ip              = ["10.169.96.7"]
  ltm2_eth1_intf_ip              = ["10.169.96.72"]
  ltm2_eth2_intf_ip              = ["10.169.97.40"]
  ltm2_eth3_intf_ip              = ["10.169.98.40"]
  ltm2_eth4_intf_ip              = ["10.169.99.40"]
  ltm2_eth5_intf_ip              = ["10.169.100.40"]
  ltm2_eth6_intf_ip              = ["10.169.101.40"]
  ltm2_eth7_intf_ip              = ["10.169.102.40"]
  }

~ltm2_main.tf~
resource "aws_network_interface" "ltm2_eth0_intf" {
  subnet_id         = var.ltm_eth0_subnet_id
  private_ips       = var.ltm2_eth0_intf_ip
  security_groups   = [var.ltm_eth0_sg_id]
  source_dest_check = "true"
  tags = {
    Name = "LTM2:ETH0"
  }
}
resource "aws_network_interface" "ltm2_eth1_intf" {
  subnet_id         = var.ltm_eth1_subnet_id
  private_ips       = var.ltm2_eth1_intf_ip
  security_groups   = [var.ltm_eth1_sg_id]
  source_dest_check = "true"
  tags = {
    Name = "LTM2:ETH1"
  }
}
resource "aws_network_interface" "ltm2_eth2_intf" {
  subnet_id         = var.ltm_eth2_subnet_id
  private_ips       = var.ltm2_eth2_intf_ip
  security_groups   = [var.ltm_eth2_sg_id]
  source_dest_check = "true"
  tags = {
    Name = "LTM2:ETH2"
  }
}

resource "aws_network_interface" "ltm2_eth3_intf" {
  subnet_id         = var.ltm_eth3_subnet_id
  private_ips       = var.ltm2_eth3_intf_ip
  security_groups   = [var.ltm_eth3_sg_id]
  source_dest_check = "true"
  tags = {
    Name = "LTM2:ETH3"
  }
}
resource "aws_network_interface" "ltm2_eth4_intf" {
  subnet_id         = var.ltm_eth4_subnet_id
  private_ips       = var.ltm2_eth4_intf_ip
  security_groups   = [var.ltm_eth4_sg_id]
  source_dest_check = "true"
  tags = {
    Name = "LTM2:ETH4"
  }
}
resource "aws_network_interface" "ltm2_eth5_intf" {
  subnet_id         = var.ltm_eth5_subnet_id
  private_ips       = var.ltm2_eth5_intf_ip
  security_groups   = [var.ltm_eth5_sg_id]
  source_dest_check = "true"
  tags = {
    Name = "LTM2:ETH5"
  }
}
resource "aws_network_interface" "ltm2_eth6_intf" {
  subnet_id         = var.ltm_eth6_subnet_id
  private_ips       = var.ltm2_eth6_intf_ip
  security_groups   = [var.ltm_eth6_sg_id]
  source_dest_check = "true"
  tags = {
    Name = "LTM2:ETH6"
  }
}
resource "aws_network_interface" "ltm2_eth7_intf" {
  subnet_id         = var.ltm_eth7_subnet_id
  private_ips       = var.ltm2_eth7_intf_ip
  security_groups   = [var.ltm_eth7_sg_id]
  source_dest_check = "true"
  tags = {
    Name = "LTM2:ETH7"
  }
}
resource "aws_instance" "ltm2" {
  ami           = "ami-07cda73ac7991dfc8"    
  instance_type = "c4.8xlarge"
  key_name      = "ltm2-key"
  disable_api_termination = "false"
  ebs_optimized           = "false"
  root_block_device {
    #device_name = "/dev/xvda"
    volume_type = "standard"
    volume_size = "142"
  }
  ebs_block_device {
    device_name = "/dev/xvdb"
    volume_type = "standard"
    volume_size = "20"
  }
  network_interface {
    network_interface_id = aws_network_interface.ltm2_eth0_intf[0].id
    device_index         = 0
  }
  network_interface {
    network_interface_id = aws_network_interface.ltm2_eth1_intf[0].id
    device_index         = 1
  }
  network_interface {
    network_interface_id = aws_network_interface.ltm2_eth2_intf[0].id
    device_index         = 2
  }
  network_interface {
    network_interface_id = aws_network_interface.ltm2_eth3_intf[0].id
    device_index         = 3
  }
  network_interface {
    network_interface_id = aws_network_interface.ltm2_eth4_intf[0].id
    device_index         = 4
  }
  network_interface {
    network_interface_id = aws_network_interface.ltm2_eth5_intf[0].id
    device_index         = 5
  }
  network_interface {
    network_interface_id = aws_network_interface.ltm2_eth6_intf[0].id
    device_index         = 6
  }
  network_interface {
    network_interface_id = aws_network_interface.ltm2_eth7_intf[0].id
    device_index         = 7
  }
  user_data = templatefile("${path.module}/ltm.tpl", {
    hostname         = "ltm2-lab"
    name_server1     = var.name_servers[0]
    name_server2     = var.name_servers[1]
    ltm_ext_vips1_ip = var.ltm2_eth2_intf_ip[0]
    ltm_ext_vips2_ip = var.ltm2_eth3_intf_ip[0]
    ltm_ext_vips3_ip = var.ltm2_eth4_intf_ip[0]
    ltm_int_vips1_ip = var.ltm2_eth5_intf_ip[0]
    ltm_int_vips2_ip = var.ltm2_eth6_intf_ip[0]
    ltm_int_vips3_ip = var.ltm2_eth7_intf_ip[0]
    ltm_traffic_ip   = var.ltm2_eth1_intf_ip[0]
    admin_pwd        = "Password1234"
  })

  tags = {
    Name = "ltm2-lab"
  }
}

~ltm.tpl~
#cloud-config
tmos_declared:
  enabled: true
  icontrollx_trusted_sources: false
  icontrollx_package_urls:
    - "https://github.com/F5Networks/f5-declarative-onboarding/releases/download/v1.37.0/f5-declarative-onboarding-1.37.0-3.noarch.rpm"
    - "https://github.com/F5Networks/f5-appsvcs-extension/releases/download/v3.44.0/f5-appsvcs-3.44.0-3.noarch.rpm"
  do_declaration:
    schemaVersion: 1.0.0
    class: Device
    async: true
    label: Cloudinit Onboarding
    Common:
      class: Tenant
      provisioningLevels:
        class: Provision
        ltm: dedicated
      System:
        class: System
        hostname: ${hostname}
        mgmtDhcpEnabled: false
        autoCheck: false
        autoPhonehome: true
      dnsServers:
        class: DNS
        nameServers:
          - ${name_server1}
          - ${name_server2}
        search:
          - ops.sfdc.net
      ntpServers:
        class: NTP
        servers:
          - ${name_server1}
          - ${name_server2}
      EXT-VIPS-1-VLAN:
        class: VLAN
        tag: 102
        interfaces:
          - name: "1.2"
            tagged: false
      SelfIp_EXT-VIPS-1:
        class: SelfIp
        address: ${ltm_ext_vips1_ip}/24
        vlan: EXT-VIPS-1-VLAN
        trafficGroup: traffic-group-local-only
        allowService: none
      EXT-VIPS-2-VLAN:
        class: VLAN
        tag: 103
        interfaces:
          - name: "1.3"
            tagged: false
      SelfIp_EXT-VIPS-2:
        class: SelfIp
        address: ${ltm_ext_vips2_ip}/24
        vlan: EXT-VIPS-2-VLAN
        trafficGroup: traffic-group-local-only
        allowService: none
      EXT-VIPS-3-VLAN:
        class: VLAN
        tag: 104
        interfaces:
          - name: "1.4"
            tagged: false
      SelfIp_EXT-VIPS-3:
        class: SelfIp
        address: ${ltm_ext_vips3_ip}/24
        vlan: EXT-VIPS-3-VLAN
        trafficGroup: traffic-group-local-only
        allowService: none
      INT-VIPS-1-VLAN:
        class: VLAN
        tag: 105
        interfaces:
          - name: "1.5"
            tagged: false
      SelfIp_INT-VIPS-1:
        class: SelfIp
        address: ${ltm_int_vips1_ip}/24
        vlan: INT-VIPS-1-VLAN
        trafficGroup: traffic-group-local-only
        allowService: none
      INT-VIPS-2-VLAN:
        class: VLAN
        tag: 106
        interfaces:
          - name: "1.6"
            tagged: false
      SelfIp_INT-VIPS-2:
        class: SelfIp
        address: ${ltm_int_vips2_ip}/24
        vlan: INT-VIPS-2-VLAN
        trafficGroup: traffic-group-local-only
        allowService: none
      INT-VIPS-3-VLAN:
        class: VLAN
        tag: 107
        interfaces:
          - name: "1.7"
            tagged: false
      SelfIp_INT-VIPS-3:
        class: SelfIp
        address: ${ltm_int_vips3_ip}/24
        vlan: INT-VIPS-3-VLAN
        trafficGroup: traffic-group-local-only
        allowService: none
      TRAFFIC-VLAN:
        class: VLAN
        tag: 101
        interfaces:
          - name: "1.1"
            tagged: false
      SelfIp_TRAFFIC:
        class: SelfIp
        address: ${ltm_traffic_ip}/27
        vlan: TRAFFIC-VLAN
        trafficGroup: traffic-group-local-only
        allowService: default
chpasswd:
  list: |
    admin:${admin_pwd}
  expire: False