Hi all, I am trying to create a test stack in Openstac Stein release using Heat orchestration in dashboard. I mentioned the template version as "2014-10-16" in my yaml hot file. I am just trying to create one ubuntu server with apache service running on it. however when I try to create the stack from horizon, the stack creation failed giving event error as -

mystack2  250e4834-811a-4158-8929-14b4b0505e25  7 minutes  Create Failed  Resource CREATE failed: ValueError: resources.apache_server: nics are required after microversion 2.36  

apache_server mystack2-apache_server-4h33dsvkdtmf  7 minutes  Create Failed  ValueError: resources.apache_server: nics are required after microversion 2.36

what could be the reason it failed to create the stack? anything I am missing to mention in the yaml file..

# Stein setup template
heat_template_version: 2014-10-16

description: 'Install Apache on a single Ubuntu vm using the  OS::Nova::Server resource type. '

parameters:

  key_name:
    type: string
    label: Key Name
    description: Name of an existing KeyPair to enable SSH access to the instances. 

  image_id:
    type: string
    label: Image ID
    description: Image to be used for compute instance
    default: Ubuntu16
    constraints:
      - allowed_values: [ Ubuntu16 ]
        description: Value must be one of Ubuntu 16.04, Ubuntu 18.04

  instance_type:
    type: string
    label: Instance Type
    description: Type of instance (flavor) to be used. 
    default: medium
    constraints:
      - allowed_values: [ medium, large, x-large ]
        description: Value must be one of m1.small, m1.medium, m1.large or m1.xlarge.

  availability_zone:
    type: string
    label: Availability Zone
    description: Physical location of the server. 
    default: nova
    constraints:
      - allowed_values: [ nova ]
        description: Value must be one of nova.

  db_port:
    type: number
    label: Database port
    description: Database port. 
    default: 5432



resources:

    allow_ssh:
        type: OS::Neutron::SecurityGroup
        properties:
            description: allow incoming SSH and ICMP traffic from anywhere.
            name: allow incoming traffic, tcp port 22 and icmp
            rules:
              - protocol: icmp
              - protocol: tcp
                port_range_min: 22
                port_range_max: 22
              - protocol: tcp
                port_range_min: 80
                port_range_max: 80
              - protocol: tcp
                port_range_min: 443
                port_range_max: 443

    apache_server:
        type: OS::Nova::Server
        properties:
            key_name: { get_param: key_name }
            image: 
              Fn::Select:
                - { get_param: image_id }
                - 
                 'Ubuntu16': 8f303c7f-bb59-4743-b490-5e11996a0d1c
            flavor: { get_param: instance_type }
            availability_zone: {get_param: availability_zone}
            security_groups:
                - { get_resource: allow_ssh }
            user_data_format: RAW
            user_data:
                str_replace:
                  template: |
                    #!/bin/bash
                    echo ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>"
                    echo "Begin: run user_data bash script. "
                    echo "Database port: DB_PORT"
                    apt-get update
                    apt-get -y upgrade
                    apt-get -y install apache2
                    echo "127.0.0.1  `hostname`" >> /etc/hosts
                    /etc/init.d/apache2 restart
                    echo "End: run user_data bash script. "
                    echo "<<<<<<<<<<<<<<<<<<<<<<<<<<<<<"
                  params:
                    DB_PORT: { get_param: db_port }

outputs:

    instance_ip:
        description: The IP address of the deployed instance
        value: { get_attr: [apache_server, first_address] }

    website_url:
        description: URL for Apache server
        value: 
            list_join: ['', ['http://', get_attr: [apache_server, first_address]]]

please let me know.

thank you for the pointers and comments.