heat_template_version: pike

description: >
  Memcached service configured with Puppet

parameters:
  ServiceData:
    default: {}
    description: Dictionary packing service data
    type: json
  ServiceNetMap:
    default: {}
    description: Mapping of service_name -> network name. Typically set
                 via parameter_defaults in the resource registry.  This
                 mapping overrides those in ServiceNetMapDefaults.
    type: json
  DefaultPasswords:
    default: {}
    type: json
  RoleName:
    default: ''
    description: Role name on which the service is applied
    type: string
  RoleParameters:
    default: {}
    description: Parameters specific to the role
    type: json
  EndpointMap:
    default: {}
    description: Mapping of service endpoint -> protocol. Typically set
                 via parameter_defaults in the resource registry.
    type: json
  MemcachedMaxMemory:
    default: '50%'
    description: The maximum amount of memory for memcached to be configured
                 to use when installed. This can be either a percentage ('50%')
                 or a fixed value ('2048').
    type: string
  MonitoringSubscriptionMemcached:
    default: 'overcloud-memcached'
    type: string
  MemcachedIpSubnet:
    default: ''
    description: IP address/subnet on the memcached network. If empty (default), MemcachedNetwork
                 will be taken. Useful in the case where an operator wants to open Memcached outside
                 of the internal network. Use this parameter with caution and be aware of
                 opening memcached to external network can be dangerous.
    type: string

conditions:
  memcached_network_unset: {equals : [{get_param: MemcachedIpSubnet}, '']}

outputs:
  role_data:
    description: Role data for the Memcached role.
    value:
      service_name: memcached
      monitoring_subscription: {get_param: MonitoringSubscriptionMemcached}
      config_settings:
        memcached_network:
          str_replace:
            template: "NETWORK_subnet"
            params:
              NETWORK: {get_param: [ServiceNetMap, MemcachedNetwork]}
        # NOTE: bind IP is found in Heat replacing the network name with the local node IP
        # for the given network; replacement examples (eg. for internal_api):
        # internal_api -> IP
        # internal_api_uri -> [IP]
        # internal_api_subnet - > IP/CIDR
        memcached::listen_ip: {get_param: [ServiceNetMap, MemcachedNetwork]}
        memcached::max_memory: {get_param: MemcachedMaxMemory}
        memcached::verbosity: 'v'
        # https://access.redhat.com/security/cve/cve-2018-1000115
        # Only accept TCP to avoid spoofed traffic amplification DoS on UDP.
        memcached::udp_port: 0
        tripleo.memcached.firewall_rules:
          '121 memcached':
            dport: 11211
            # https://access.redhat.com/security/cve/cve-2018-1000115
            # Only accept TCP to avoid spoofed traffic amplification DoS on UDP.
            proto: 'tcp'
            # Memcached traffic shouldn't be open on the internet.
            # Even if binding is configured on internal_api network, enforce it
            # via firewall as well.
            source:
              if:
              - memcached_network_unset
              - "%{hiera('memcached_network')}"
              - {get_param: MemcachedIpSubnet}
      step_config: |
        include ::tripleo::profile::base::memcached
      service_config_settings:
        collectd:
            tripleo.collectd.plugins.memcached:
              - memcached
            collectd::plugin::memcached::instances:
              local:
                host: "%{hiera('memcached::listen_ip')}"
                port: 11211
