node_types:
  tosca.nodes.HACompute:
    derived_from: tosca.nodes.Compute
    capabilities:
      high_availability:
        type: tosca.capabilities.HA
    requirements:
      - high_availability:
          capability: tosca.capabilities.HA
          relationship: tosca.relationships.HA
          node: tosca.nodes.HACompute
          occurences: [ 0, 1 ]

relationship_types:
  tosca.relationships.HA:
    derived_from: tosca.relationships.Root
    valid_target_types: [ tosca.capabilities.HA ]

capability_types:
  tosca.capabilities.HA:
    derived_from: tosca.capabilities.Root
    valid_source_types: [ tosca.nodes.HACompute ]