heat_template_version: 2013-05-23

description: >
    This is a nested stack that defines a Kubernetes master. This stack is
    included by an ResourceGroup resource in the parent template
    (kubecluster-coreos.yaml).

parameters:

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

  master_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

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

  token:
    type: string
    description: token is generated from https://discovery.etcd.io/new

  ssh_authorized_key:
    type: string
    description: complete ssh key.

  dns_nameserver:
    type: string
    description: address of a dns nameserver reachable in your environment
    default: 8.8.8.8

  portal_network_cidr:
    type: string
    description: >
      address range used by kubernetes for service portals
    default: 10.254.0.0/16

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

  flannel_network_cidr:
    type: string
    description: network range for flannel overlay network
    default: 10.100.0.0/16

  flannel_network_subnetlen:
    type: string
    description: size of subnet assigned to each master
    default: 24

  flannel_use_vxlan:
    type: string
    description: >
      if true use the vxlan backend, otherwise use the default
      udp backend
    default: "false"
    constraints:
      - allowed_values: ["true", "false"]

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

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

  wait_condition_timeout:
    type: number
    default: 6000
    description : >
      timeout for the Wait Conditions

  auth_url:
    type: string
    description: >
      url for kubernetes to authenticate before sending request to neutron

  username:
    type: string
    description: >
      user account

  password:
    type: string
    description: >
      user password

  tenant_name:
    type: string
    description: >
      tenant name

resources:

  master_wait_handle:
    type: AWS::CloudFormation::WaitConditionHandle

  master_wait_condition:
    type: AWS::CloudFormation::WaitCondition
    depends_on:
      - kube_master
    properties:
      Handle:
        get_resource: master_wait_handle
      Timeout: {get_param: wait_condition_timeout}


  ######################################################################
  #
  # security groups.  we need to permit network traffic of various
  # sorts.
  #

  secgroup_base:
    type: OS::Neutron::SecurityGroup
    properties:
      rules:
        - protocol: icmp
        - protocol: tcp
          port_range_min: 22
          port_range_max: 22

  secgroup_kubernetes:
    type: OS::Neutron::SecurityGroup
    properties:
      rules:
        - protocol: tcp
          port_range_min: 7080
          port_range_max: 7080
        - protocol: tcp
          port_range_min: 8080
          port_range_max: 8080
        - protocol: tcp
          port_range_min: 2379
          port_range_max: 2379
        - protocol: tcp
          port_range_min: 2380
          port_range_max: 2380
        - protocol: tcp
          port_range_min: 6443
          port_range_max: 6443

  ######################################################################
  #
  # 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-master.yaml}
          params:
            "$KUBE_ALLOW_PRIV": {get_param: kube_allow_priv}
            "$FLANNEL_NETWORK_CIDR": {get_param: flannel_network_cidr}
            "$FLANNEL_NETWORK_SUBNETLEN": {get_param: flannel_network_subnetlen}
            "$FLANNEL_USE_VXLAN": {get_param: flannel_use_vxlan}
            "$PORTAL_NETWORK_CIDR": {get_param: portal_network_cidr}
            "$AUTH_URL": {get_param: auth_url}
            "$USERNAME": {get_param: username}
            "$PASSWORD": {get_param: password}
            "$TENANT_NAME": {get_param: tenant_name}
            "$CLUSTER_SUBNET": {get_param: fixed_subnet}

  write_kube_os_config:
    type: OS::Heat::SoftwareConfig
    properties:
      group: ungrouped
      config: {get_file: fragments/write-kube-os-config.sh}

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

  write_flannel_config:
    type: OS::Heat::SoftwareConfig
    properties:
      group: ungrouped
      config: {get_file: fragments/write-flannel-config.sh}

  flannel_config_service:
    type: OS::Heat::SoftwareConfig
    properties:
      group: ungrouped
      config: {get_file: fragments/flannel-config.service.yaml}

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

  cfn_signal:
    type: OS::Heat::SoftwareConfig
    properties:
      group: ungrouped
      config: {get_file: fragments/cfn-signal.sh}

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

  coreos_params:
    type: OS::Heat::SoftwareConfig
    properties:
      group: ungrouped
      config:
        str_replace:
          template: {get_file: fragments/coreos.params.yaml}
          params:
            token: {get_param: token}
            ssh_authorized_key: {get_param: ssh_authorized_key}

  kube_master_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: write_kube_os_config}
        - config: {get_resource: configure_kubernetes}
        - config: {get_resource: enable_services}
        - config: {get_resource: write_flannel_config}
        - config: {get_resource: flannel_config_service}
        - config: {get_resource: kube_examples}
        - config: {get_resource: cfn_signal}
        - config: {get_resource: coreos_params}

  ######################################################################
  #
  # a single kubernetes master.
  #

  kube_master:
    type: OS::Nova::Server
    properties:
      image: {get_param: server_image}
      flavor: {get_param: master_flavor}
      key_name: {get_param: ssh_key_name}
      user_data_format: RAW
      user_data: {get_resource: kube_master_init}
      networks:
        - port: {get_resource: kube_master_eth0}

  kube_master_eth0:
    type: OS::Neutron::Port
    properties:
      network: {get_param: fixed_network}
      security_groups:
        - {get_resource: secgroup_base}
        - {get_resource: secgroup_kubernetes}
      fixed_ips:
        - subnet: {get_param: fixed_subnet}
      replacement_policy: AUTO

  kube_master_floating:
    type: OS::Neutron::FloatingIP
    properties:
      floating_network: {get_param: external_network}
      port_id: {get_resource: kube_master_eth0}

outputs:

  kube_master_ip:
    value: {get_attr: [kube_master_eth0, fixed_ips, 0, ip_address]}

  kube_master_external_ip:
    value: {get_attr: [kube_master_floating, floating_ip_address]}