xlab-si/xopera-opera

tosca_definitions_version: tosca_simple_yaml_1_3

node_types:
  radon.nodes.OpenStack.VM:
    derived_from: tosca.nodes.Compute
    attributes:
      available_instances:
        type: integer
        default: 42
      available_space:
        type: integer
        default: 1000
    properties:
      name:
        type: string
      image:
        type: string
      flavor:
        type: string
      network:
        type: string
      key_name:
        type: string
    interfaces:
      Standard:
        type: tosca.interfaces.node.lifecycle.Standard
        operations:
          create: playbooks/create.yaml
          delete: playbooks/delete.yaml
      scaling_up:
        type: radon.interfaces.scaling.ScaleUp
      scaling_down:
        type: radon.interfaces.scaling.ScaleDown
      autoscaling:
        type: radon.interfaces.scaling.AutoScale
    requirements:
      - host:
          capability: tosca.capabilities.Compute
          relationship: tosca.relationships.HostedOn

interface_types:
  radon.interfaces.scaling.ScaleDown:
    derived_from: tosca.interfaces.Root
    operations:
      scale_down:
        inputs:
          adjustment: { default: 1, type: integer }
        description: Operation for scaling down.
        implementation: playbooks/scale_down.yaml

  radon.interfaces.scaling.ScaleUp:
    derived_from: tosca.interfaces.Root
    operations:
      scale_up:
        inputs:
          adjustment: { default: 1, type: integer }
        description: Operation for scaling up.
        implementation: playbooks/scale_up.yaml

  radon.interfaces.scaling.AutoScale:
    derived_from: tosca.interfaces.Root
    operations:
      retrieve_info:
        description: Operation for autoscaling.
        implementation: playbooks/retrieve_info.yaml
      autoscale:
        description: Operation for autoscaling.
        implementation: playbooks/auto_scale.yaml

policy_types:
  radon.policies.scaling.ScaleDown:
    derived_from: tosca.policies.Scaling
    properties:
      cpu_lower_bound:
        description: The lower bound for the CPU
        type: float
        required: false
        constraints:
          - less_or_equal: 20.0
      adjustment:
        description: The amount by which to scale
        type: integer
        required: true
        constraints:
          - greater_or_equal: 1
    targets: [ radon.nodes.OpenStack.VM ]
    triggers:
      radon.triggers.scaling.ScaleDown:
        description: A trigger for scaling down
        event: scale_down_trigger
        target_filter:
          node: radon.nodes.OpenStack.VM
        condition:
          constraint:
            - not:
                - and:
                    - available_instances: [ { greater_than: 42 } ]
                    - available_space: [ { greater_than: 1000 } ]
        action:
          - call_operation:
              operation: scaling_down.scale_down
              inputs:
                adjustment: { get_property: [ SELF, adjustment ] }

  radon.policies.scaling.ScaleUp:
    derived_from: tosca.policies.Scaling
    properties:
      cpu_upper_bound:
        description: The upper bound for the CPU
        type: float
        required: false
        constraints:
          - greater_or_equal: 80.0
      adjustment:
        description: The amount by which to scale
        type: integer
        required: true
        constraints:
          - greater_or_equal: 1
    targets: [ radon.nodes.OpenStack.VM ]
    triggers:
      radon.triggers.scaling.ScaleUp:
        description: A trigger for scaling up
        event: scale_up_trigger
        target_filter:
          node: radon.nodes.OpenStack.VM
        condition:
          constraint:
            - not:
                - and:
                    - available_instances: [ { greater_than: 42 } ]
                    - available_space: [ { greater_than: 1000 } ]
        action:
          - call_operation:
              operation: scaling_up.scale_up
              inputs:
                adjustment: { get_property: [ SELF, adjustment ] }

  radon.policies.scaling.AutoScale:
    derived_from: tosca.policies.Scaling
    properties:
      min_size:
        type: integer
        description: The minimum number of instances
        required: true
        status: supported
        constraints:
          - greater_or_equal: 1
      max_size:
        type: integer
        description: The maximum number of instances
        required: true
        status: supported
        constraints:
          - less_or_equal: 10

topology_template:
  node_templates:
    workstation:
      type: tosca.nodes.Compute
      attributes:
        private_address: localhost
        public_address: localhost

    openstack_vm:
      type: radon.nodes.OpenStack.VM
      properties:
        name: HostVM
        image: centos7
        flavor: m1.xsmall
        network: provider_64_net
        key_name: my_key
      requirements:
        - host: workstation

  policies:
    - scale_down:
        type: radon.policies.scaling.ScaleDown
        properties:
          cpu_lower_bound: 10
          adjustment: 1
        targets: [ openstack_vm ]

    - scale_up:
        type: radon.policies.scaling.ScaleUp
        properties:
          cpu_upper_bound: 90
          adjustment: 1
        targets: [ openstack_vm ]

    - autoscale:
        type: radon.policies.scaling.AutoScale
        properties:
          min_size: 3
          max_size: 7
        targets: [ openstack_vm ]
        triggers:
          radon.triggers.scaling.AutoScale:
            description: A trigger for autoscaling
            event: auto_scale_trigger
            schedule:
              start_time: 2020-04-08T21:59:43.10-06:00
              end_time: 2022-04-08T21:59:43.10-06:00
            target_filter:
              node: openstack_vm
            condition:
              constraint:
                - not:
                    - and:
                        - available_instances: [ { greater_than: 42 } ]
                        - available_space: [ { greater_than: 1000 } ]
              period: 60 s
              evaluations: 2
              method: average
            action:
              - call_operation: autoscaling.retrieve_info
              - call_operation: autoscaling.autoscale