heat_template_version: 2013-05-23

description: >
  This is a nested stack that defines a single Kubernetes minion,
  based on a vanilla Fedora 20 cloud image.  This stack is included by
  a ResourceGroup resource in the parent template (kubecluster.yaml).

parameters:

  server_image:
    type: string
    description: glance image used to boot the server

  minion_flavor:
    type: string
    description: flavor to use when booting the server

  ssh_key_name:
    type: string
    description: name of ssh key to be provisioned on our server

  external_network:
    type: string
    description: uuid/name of a network to use for floating ip addresses

  kube_allow_priv:
    type: string
    description: >
      whether or not kubernetes should permit privileged containers.
    constraints:
      - allowed_values: ["true", "false"]

  kube_master_ip:
    type: string
    description: IP address of the Kubernetes master server.

  fixed_network:
    type: string
    description: Network from which to allocate fixed addresses.

  wait_condition_timeout:
    type: number
    description : >
      timeout for the Wait Conditions

resources:

  minion_wait_handle:
    type: OS::Heat::WaitConditionHandle

  minion_wait_condition:
    type: OS::Heat::WaitCondition
    depends_on: kube-minion
    properties:
      handle: {get_resource: minion_wait_handle}
      timeout: {get_param: wait_condition_timeout}

  ######################################################################
  #
  # software configs.  these are components that are combined into
  # a multipart MIME user-data archive.
  #

  write_heat_params:
    type: OS::Heat::SoftwareConfig
    properties:
      group: ungrouped
      config:
        str_replace:
          template: {get_file: fragments/write-heat-params.yaml}
          params:
            $KUBE_ALLOW_PRIV: {get_param: kube_allow_priv}
            $KUBE_MASTER_IP: {get_param: kube_master_ip}
            $WAIT_HANDLE: {get_resource: minion_wait_handle}

  configure_kubernetes_minion:
    type: OS::Heat::SoftwareConfig
    properties:
      group: ungrouped
      config: {get_file: fragments/configure-kubernetes-minion.sh}

  kube_user:
    type: OS::Heat::SoftwareConfig
    properties:
      group: ungrouped
      config: {get_file: fragments/kube-user.yaml}

  kube_examples:
    type: OS::Heat::SoftwareConfig
    properties:
      group: ungrouped
      config: {get_file: fragments/kube-examples.yaml}

  docker_service:
    type: OS::Heat::SoftwareConfig
    properties:
      group: ungrouped
      config: {get_file: fragments/docker.service.yaml}

  enable_services:
    type: OS::Heat::SoftwareConfig
    properties:
      group: ungrouped
      config: {get_file: fragments/enable-services-minion.sh}

  minion_wc_notify:
    type: OS::Heat::SoftwareConfig
    properties:
      group: ungrouped
      config:
        str_replace:
          template: |
            #!/bin/bash -v
            wc_notify --data-binary '{"status": "SUCCESS"}'
          params:
            wc_notify: {get_attr: [minion_wait_handle, curl_cli]}

  disable_selinux:
    type: OS::Heat::SoftwareConfig
    properties:
      group: ungrouped
      config: {get_file: fragments/disable-selinux.sh}

  kube_minion_init:
    type: OS::Heat::MultipartMime
    properties:
      parts:
        - config: {get_resource: disable_selinux}
        - config: {get_resource: write_heat_params}
        - config: {get_resource: kube_user}
        - config: {get_resource: kube_examples}
        - config: {get_resource: configure_kubernetes_minion}
        - config: {get_resource: docker_service}
        - config: {get_resource: enable_services}
        - config: {get_resource: minion_wc_notify}

  # Important:  the name for the heat resource kube-minion below must
  # not contain "_" (underscore) because it will be used in the
  # hostname.  Because DNS domain name does not allow "_", the "_"
  # will be converted to a "-" and this will make the hostname different
  # from the Nova instance name.  This in turn will break the load
  # balancer feature in Kubernetes.

  kube-minion:
    type: OS::Nova::Server
    properties:
      image: {get_param: server_image}
      flavor: {get_param: minion_flavor}
      key_name: {get_param: ssh_key_name}
      user_data_format: RAW
      user_data: {get_resource: kube_minion_init}
      networks:
        - network: {get_param: fixed_network}

  kube_minion_floating:
    type: OS::Neutron::FloatingIP
    properties:
      floating_network: {get_param: external_network}
      port_id:
        get_attr: [kube-minion, addresses, {get_param: fixed_network}, 0, port]

outputs:

  kube_minion_ip:
    value: {get_attr: [kube-minion, networks, private, 0]}

  kube_minion_external_ip:
    value: {get_attr: [kube_minion_floating, floating_ip_address]}

  OS::stack_id:
    value: {get_attr: [kube-minion, networks, private, 0]}