heat_template_version: 2014-10-16

description: >
  This is a nested stack that defines a single Kubernetes minion, This stack is
  included by an AutoScalingGroup resource in the parent template
  (kubecluster.yaml).

parameters:

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

  minion_flavor:
    type: string
    default: m1.small
    description: flavor to use when booting the server

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

  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.
    default: "false"
    constraints:
      - allowed_values: ["true", "false"]

  docker_volume_size:
    type: number
    description: >
      size of a cinder volume to allocate to docker for container/image
      storage
    default: 0

  tls_disabled:
    type: boolean
    description: whether or not to enable TLS
    default: False

  kubernetes_port:
    type: number
    description: >
      The port which are used by kube-apiserver to provide Kubernetes
      service.
    default: 6443

  cluster_uuid:
    type: string
    description: identifier for the cluster this template is generating

  magnum_url:
    type: string
    description: endpoint to retrieve TLS certs from

  kube_version:
    type: string
    description: version of kubernetes used for kubernetes cluster

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

  etcd_server_ip:
    type: string
    description: IP address of the Etcd server.

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

  fixed_subnet:
    type: string
    description: Subnet from which to allocate fixed addresses.

  network_driver:
    type: string
    description: network driver to use for instantiating container networks

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

  http_proxy:
    type: string
    description: http proxy address for docker

  https_proxy:
    type: string
    description: https proxy address for docker

  no_proxy:
    type: string
    description: no proxies for docker

  registry_enabled:
    type: boolean
    description: >
      Indicates whether the docker registry is enabled.
    default: false

  registry_port:
    type: number
    description: port of registry service
    default: 5000

  registry_username:
    type: string
    description: username used by docker registry
    default: "username"

  registry_password:
    type: string
    description: password used by docker registry
    default: "password"

  registry_domain:
    type: string
    description: domain used by docker registry
    default: "domain"

  registry_trust_id:
    type: string
    description: trust_id used by docker registry
    default: "trust_id"

  registry_auth_url:
    type: string
    description: auth_url for keystone
    default: "auth_url"

  registry_region:
    type: string
    description: region of swift service
    default: "region"

  registry_container:
    type: string
    description: >
      name of swift container which docker registry stores images in
    default: "container"

  registry_insecure:
    type: boolean
    description: >
      indicates whether to skip TLS verification between registry and backend storage
    default: true

  registry_chunksize:
    type: number
    description: >
      size fo the data segments for the swift dynamic large objects
    default: 5242880

  secgroup_kube_minion_id:
    type: string
    description: ID of the security group for kubernetes minion.

  kube_minion_id:
    type: string
    description: ID of for kubernetes minion.

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-minion.yaml}
          params:
            "$KUBE_ALLOW_PRIV": {get_param: kube_allow_priv}
            "$KUBE_MASTER_IP": {get_param: kube_master_ip}
            "$KUBE_NODE_IP": {get_attr: [kube_minion_eth0, fixed_ips, 0, ip_address]}
            "$KUBE_API_PORT": {get_param: kubernetes_port}
            "$ETCD_SERVER_IP": {get_param: etcd_server_ip}
            "$DOCKER_VOLUME": {get_resource: docker_volume}
            "$NETWORK_DRIVER": {get_param: network_driver}
            "$REGISTRY_ENABLED": {get_param: registry_enabled}
            "$REGISTRY_PORT": {get_param: registry_port}
            "$REGISTRY_AUTH_URL": {get_param: registry_auth_url}
            "$REGISTRY_REGION": {get_param: registry_region}
            "$REGISTRY_USERNAME": {get_param: registry_username}
            "$REGISTRY_PASSWORD": {get_param: registry_password}
            "$REGISTRY_DOMAIN": {get_param: registry_domain}
            "$REGISTRY_TRUST_ID": {get_param: registry_trust_id}
            "$REGISTRY_CONTAINER": {get_param: registry_container}
            "$REGISTRY_INSECURE": {get_param: registry_insecure}
            "$REGISTRY_CHUNKSIZE": {get_param: registry_chunksize}
            "$TLS_DISABLED": {get_param: tls_disabled}
            "$KUBE_VERSION": {get_param: kube_version}
            "$CLUSTER_UUID": {get_param: cluster_uuid}
            "$MAGNUM_URL": {get_param: magnum_url}
            "$HTTP_PROXY": {get_param: http_proxy}
            "$HTTPS_PROXY": {get_param: https_proxy}
            "$NO_PROXY": {get_param: no_proxy}

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

  configure_docker:
    type: OS::Heat::SoftwareConfig
    properties:
      group: ungrouped
      config: {get_file: fragments/configure-docker.sh}

  create_kubernetes_user:
    type: OS::Heat::SoftwareConfig
    properties:
      group: ungrouped
      config: {get_file: fragments/create-kubernetes-user.yaml}

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

  add_proxy:
    type: OS::Heat::SoftwareConfig
    properties:
      group: ungrouped
      config: {get_file: fragments/add-proxy.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]}

  kube_minion_init:
    type: OS::Heat::MultipartMime
    properties:
      parts:
        - config: {get_resource: write_heat_params}
        - config: {get_resource: configure_flanneld}
        - config: {get_resource: configure_docker}
        - config: {get_resource: create_kubernetes_user}
        - config: {get_resource: configure_kubernetes}
        - config: {get_resource: add_proxy}
        - config: {get_resource: minion_wc_notify}

  ######################################################################
  #
  # a single kubernetes minion.
  # 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:
      name: {get_param: kube_minion_id}
      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:
        - port: {get_resource: kube_minion_eth0}

  kube_minion_eth0:
    type: OS::Neutron::Port
    properties:
      network: {get_param: fixed_network}
      security_groups:
        - get_param: secgroup_kube_minion_id
      fixed_ips:
        - subnet: {get_param: fixed_subnet}
      replacement_policy: AUTO

  kube_minion_floating:
    type: Magnum::Optional::KubeMinion::Neutron::FloatingIP
    properties:
      floating_network: {get_param: external_network}
      port_id: {get_resource: kube_minion_eth0}

  ######################################################################
  #
  # docker storage.  This allocates a cinder volume and attaches it
  # to the minion.
  #

  docker_volume:
    type: OS::Cinder::Volume
    properties:
      size: {get_param: docker_volume_size}

  docker_volume_attach:
    type: OS::Cinder::VolumeAttachment
    properties:
      instance_uuid: {get_resource: kube-minion}
      volume_id: {get_resource: docker_volume}
      mountpoint: /dev/vdb

outputs:

  kube_minion_ip:
    value: {get_attr: [kube_minion_eth0, fixed_ips, 0, ip_address]}
    description: >
      This is the "public" IP address of the Kubernetes minion node.

  kube_minion_external_ip:
    value: {get_attr: [kube_minion_floating, floating_ip_address]}
    description: >
      This is the "public" IP address of the Kubernetes minion node.

  OS::stack_id:
    value: {get_param: "OS::stack_id"}
    description: >
      This is a id of the stack which creates from this template.
