Clustering service for managing homogeneous objects in OpenStack
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heat_template_version: 2016-04-08
description: >
This template demonstrate how to create a cluster and attach a
loadbalance policy, a scale-out policy and scale-in policy to it.
parameters:
flavor:
description: Flavor for the instances to be created.
type: string
default: m1.nano
image:
description: Name or ID of the image to use for the instances.
type: string
default: cirros-0.3.5-x86_64-disk
key_name:
description: Name of an existing key pair to use for the instances.
type: string
network:
description: The network for the instances.
type: string
default: private
pool_subnet:
description: Subnet for the port on which members can be connected.
type: string
default: private-subnet
vip_subnet:
description: Subnet on which VIP address will be allocated.
type: string
default: private-subnet
resources:
security_group:
type: OS::Neutron::SecurityGroup
properties:
rules:
- protocol: icmp
- protocol: tcp
port_range_min: 22
port_range_max: 22
- protocol: tcp
port_range_min: 80
port_range_max: 80
profile:
type: OS::Senlin::Profile
properties:
type: os.nova.server-1.0
properties:
flavor: {get_param: flavor}
image: {get_param: image}
key_name: {get_param: key_name}
networks:
- network: {get_param: network}
security_groups:
- {get_resource: security_group}
cluster:
type: OS::Senlin::Cluster
properties:
desired_capacity: 2
min_size: 2
profile: {get_resource: profile}
scale_in_policy:
type: OS::Senlin::Policy
properties:
type: senlin.policy.scaling-1.0
bindings:
- cluster: {get_resource: cluster}
properties:
event: CLUSTER_SCALE_IN
adjustment:
type: CHANGE_IN_CAPACITY
number: 1
scale_out_policy:
type: OS::Senlin::Policy
properties:
type: senlin.policy.scaling-1.0
bindings:
- cluster: {get_resource: cluster}
properties:
event: CLUSTER_SCALE_OUT
adjustment:
type: CHANGE_IN_CAPACITY
number: 1
lb_policy:
type: OS::Senlin::Policy
properties:
type: senlin.policy.loadbalance-1.0
bindings:
- cluster: {get_resource: cluster}
properties:
pool:
protocol: HTTP
protocol_port: 80
subnet: {get_param: pool_subnet}
lb_method: ROUND_ROBIN
vip:
subnet: {get_param: vip_subnet}
protocol: HTTP
protocol_port: 80
health_monitor:
type: HTTP
delay: 10
timeout: 5
max_retries: 4
receiver_scale_out:
type: OS::Senlin::Receiver
properties:
cluster: {get_resource: cluster}
action: CLUSTER_SCALE_OUT
type: webhook
receiver_scale_in:
type: OS::Senlin::Receiver
properties:
cluster: {get_resource: cluster}
action: CLUSTER_SCALE_IN
type: webhook
deletion_policy:
type: OS::Senlin::Policy
properties:
type: senlin.policy.deletion-1.0
bindings:
- cluster: {get_resource: cluster}
properties:
criteria: YOUNGEST_FIRST
destroy_after_deletion: True
grace_period: 20
reduce_desired_capacity: False
scale_in_alarm:
type: OS::Ceilometer::Alarm
properties:
description: trigger when bandwidth overflow
meter_name: network.services.lb.incoming.bytes.rate
statistic: avg
period: 180
evaluation_periods: 1
threshold: 12000
repeat_actions: True
alarm_actions:
- {get_attr: [receiver_scale_in, channel, alarm_url]}
comparison_operator: le
query:
metadata.user_metadata.cluster_id: {get_resource: cluster}
scale_out_alarm:
type: OS::Ceilometer::Alarm
properties:
description: trigger when bandwidth insufficient
meter_name: network.services.lb.incoming.bytes.rate
statistic: avg
period: 60
evaluation_periods: 1
threshold: 28000
repeat_actions: True
alarm_actions:
- {get_attr: [receiver_scale_out, channel, alarm_url]}
comparison_operator: ge
query:
metadata.user_metadata.cluster_id: {get_resource: cluster}