73f8bd3944
This change adds some outputs based on path based nested attribute access using `outputs_list` and `outputs`. Change-Id: I3ab0c0ec1156fbb1a7ebbf51f520d584faa726b7
107 lines
3.5 KiB
YAML
107 lines
3.5 KiB
YAML
heat_template_version: 2014-10-16
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description: >
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This is a very simple template that illustrates the basic features
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of OS::Heat::AutoScalingGroup when the scaled resource is an
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OS::Nova::Server. By virtue of its simplicity this example should
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be usable in many contexts. In particular, this example does not
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require Neutron nor a load balancer nor any particular support for
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software in the VMs. In fact, the VMs in this example do not
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actually do anything. This example does no automatic scaling, but
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does discuss manual scaling.
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For a more complete example, see autoscaling.yaml.
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parameters:
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key_name:
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type: string
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description: Name of an existing key pair to use for the instances
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constraints:
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- custom_constraint: nova.keypair
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description: Must name a public key (pair) known to Nova
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flavor:
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type: string
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description: Flavor for the instances to be created
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default: m1.small
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constraints:
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- custom_constraint: nova.flavor
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description: Must be a flavor known to Nova
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image:
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type: string
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description: >
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Name or ID of the image to use for the instances.
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You can get the default from
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http://cloud.fedoraproject.org/fedora-20.x86_64.qcow2
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There is also
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http://cloud.fedoraproject.org/fedora-20.i386.qcow2
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Any image should work since this template
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does not ask the VMs to do anything.
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constraints:
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- custom_constraint: glance.image
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description: Must identify an image known to Glance
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network:
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type: string
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description: The network for the VM
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default: private
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resources:
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asg:
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type: OS::Heat::AutoScalingGroup
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properties:
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resource:
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type: OS::Nova::Server
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properties:
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key_name: { get_param: key_name }
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image: { get_param: image }
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flavor: { get_param: flavor }
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networks: [{network: {get_param: network} }]
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min_size: 1
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desired_capacity: 3
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max_size: 10
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scale_up_policy:
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type: OS::Heat::ScalingPolicy
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properties:
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adjustment_type: change_in_capacity
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auto_scaling_group_id: {get_resource: asg}
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cooldown: 60
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scaling_adjustment: 1
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scale_down_policy:
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type: OS::Heat::ScalingPolicy
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properties:
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adjustment_type: change_in_capacity
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auto_scaling_group_id: {get_resource: asg}
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cooldown: 60
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scaling_adjustment: '-1'
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outputs:
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scale_up_url:
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description: >
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This URL is the webhook to scale up the group. You can invoke
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the scale-up operation by doing an HTTP POST to this URL; no
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body nor extra headers are needed.
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value: {get_attr: [scale_up_policy, alarm_url]}
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scale_dn_url:
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description: >
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This URL is the webhook to scale down the group. You can invoke
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the scale-down operation by doing an HTTP POST to this URL; no
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body nor extra headers are needed.
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value: {get_attr: [scale_down_policy, alarm_url]}
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asg_size:
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description: >
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This is the current size of the auto scaling group.
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value: {get_attr: [asg, current_size]}
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server_list:
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description: >
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This is a list of server names that are part of the group.
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value: {get_attr: [asg, outputs_list, name]}
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networks:
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description: >
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This is a map of server resources and their networks.
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value: {get_attr: [asg, outputs, networks]}
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server_ips:
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description: >
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This is a list of first ip addresses of the servers in the group
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for a specified network.
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value: {get_attr: [asg, outputs_list, networks, {get_param: network}, 0]}
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