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heat_template_version: 2017-02-24
description: >
A stack containing an Autoscaling Group whose members automatically heal
themselves if they are stopped, deleted, or go into an error state, using an
Aodh alarm delivered to a Zaqar queue that triggers a Mistral workflow to
replace the stopped server. Note that this requires event alarms to be
enabled in Aodh, following the instructions at
http://docs.openstack.org/developer/aodh/event-alarm.html - specifically by
adding the publisher "notifier://?topic=alarm.all" in
/etc/ceilometer/event_pipeline.yaml.
parameters:
flavor:
type: string
description: Flavor for the instances to be created
default: cirros256
constraints:
- custom_constraint: nova.flavor
description: Must be a flavor known to Nova
image:
type: string
description: >
Name or ID of the image to use for the instances.
default: cirros-0.3.4-x86_64-uec
constraints:
- custom_constraint: glance.image
description: Must identify an image known to Glance
network:
type: string
description: The network for the VM
default: private
port:
type: number
description: The port to reply to requests on
default: 8080
resources:
servers:
type: OS::Heat::AutoScalingGroup
properties:
resource:
type: autohealing_server.yaml
properties:
flavor: {get_param: flavor}
image: {get_param: image}
network: {get_param: network}
port: {get_param: port}
root_stack_id: {get_param: "OS::stack_id"}
min_size: 1
desired_capacity: 2
max_size: 4
outputs:
server_ids:
description: A list of the current server UUIDs
value: {get_attr: [servers, refs]}
ip_addresses:
description: A list of server IP addresses
value: {get_attr: [servers, outputs_list, first_address]}
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