nova_keypair_existing.yaml

# http://docs.openstack.org/developer/heat/template_guide/hot_spec.html#heat-template-version
heat_template_version: 2021-04-16


description: >
  This template launches a server instance using the OS::Nova::KeyPair
  resource type configured to use an existing public key that you have on your
  machine. You will have to paste the contents of the key into the public_key
  parameter. With a create command starting with something like
    $ openstack stack create --parameter public_key='ssh-rsa AAAAYourPublicKey== you@host' ...


parameters:
  public_key:
    type: string
    description: The actual public key you are providing

  flavor:
    type: string
    description: The NeCTAR flavour the webserver is to run on
    default: m3.xsmall
    # can use the provided custom constraint to check that the flavor does exist
    constraints:
      - custom_constraint: nova.flavor
        description: Must be a valid Nectar flavour

  image:
    type: string
    description: ID of the image to use
    default: NeCTAR Ubuntu 22.04 LTS (Jammy) amd64

  availability_zone:
    type: string
    description: Availability Zone


resources:
  existing_key_pair:
    # http://docs.openstack.org/developer/heat/template_guide/openstack.html#OS::Nova::KeyPair
    type: OS::Nova::KeyPair
    properties:
      name: uploaded_keypair
      public_key: { get_param: public_key }

  security_group:
    # https://docs.openstack.org/heat/latest/template_guide/openstack.html#OS::Neutron::SecurityGroup
    type: OS::Neutron::SecurityGroup
    properties:
      rules:
        - remote_ip_prefix: 0.0.0.0/0
          protocol: icmp
        - remote_ip_prefix: 0.0.0.0/0
          protocol: tcp
          port_range_min: 22
          port_range_max: 22

  server:
    # http://docs.openstack.org/developer/heat/template_guide/openstack.html#OS::Nova::Server
    type: OS::Nova::Server
    properties:
      key_name: { get_resource: existing_key_pair }
      image: { get_param: image }
      flavor: { get_param: flavor }
      availability_zone: { get_param: availability_zone }
      security_groups:
        - { get_resource: security_group }
      networks:
        - allocate_network: auto


outputs:
  server_ip:
    description: The IP address of server one
    value: { get_attr: [server, first_address] }