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heat_template_version: 2013-05-23
description: AutoScaling
parameters:
instance_type:
type: string
description: Type of the instance to be created.
default: m1.tiny
constraints:
- allowed_values: [m1.tiny, m1.small, m1.medium, m1.large]
description:
Value must be one of 'm1.tiny', 'm1.small', 'm1.medium' or 'm1.large'.
image_id:
type: string
description: ID of the image to use for the instance to be created.
default: myfirstimage
resources:
web_server_group_launch_conf:
type: AWS::AutoScaling::LaunchConfiguration
properties:
ImageId: { get_param: image_id }
InstanceType: { get_param: instance_type }
server_group:
type: AWS::AutoScaling::AutoScalingGroup
properties:
AvailabilityZones: ["RegionOne"]
MinSize: '1'
MaxSize: '3'
LaunchConfigurationName: {get_resource: web_server_group_launch_conf}
web_server_scaleup_policy:
type: AWS::AutoScaling::ScalingPolicy
properties:
AdjustmentType: ChangeInCapacity
AutoScalingGroupName: {get_resource: server_group}
Cooldown: 60
ScalingAdjustment: 1
web_server_scaledown_policy:
type: AWS::AutoScaling::ScalingPolicy
properties:
AdjustmentType: ChangeInCapacity
AutoScalingGroupName: {get_resource: server_group}
Cooldown: 60
ScalingAdjustment: -1
cpu_alarm_high:
type: OS::Ceilometer::Alarm
properties:
description: Scale-up if the average CPU > 80% for 5 minute
meter_name: cpu_util
statistic: avg
period: '300'
evaluation_periods: '1'
threshold: '80'
alarm_actions:
- {get_attr: [web_server_scaleup_policy, AlarmUrl]}
comparison_operator: gt
cpu_alarm_low:
type: OS::Ceilometer::Alarm
properties:
description: Scale-down if the average CPU < 45% for 2 minutes
meter_name: cpu_util
statistic: avg
period: '120'
evaluation_periods: '1'
threshold: '45'
alarm_actions:
- {get_attr: [web_server_scaledown_policy, AlarmUrl]}
comparison_operator: lt
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