Tripleo autoscale instance

common.yaml

heat_template_version: 2016-10-14

description: Common Template

resources:
  flavor-cirros:
    type: OS::Nova::Flavor
    properties:
      name: flavor-cirros
      ram: 100 
      vcpus: 1
      disk: 1
      
  mykey:
    type: OS::Nova::KeyPair
    properties:
      name: psachin-key
      save_private_key: true

  ping-ssh:
    type: OS::Neutron::SecurityGroup
    properties:
      name: ping-ssh-sec-group
      rules:
        - protocol: tcp
          remote_ip_prefix: 0.0.0.0/0
          port_range_min: 22
          port_range_max: 22
        - protocol: icmp
          remote_ip_prefix: 0.0.0.0/0

  public-net:
    description: External network   
    type: OS::Neutron::ProviderNet
    properties:
      name: public-net
      network_type: flat
      physical_network: datacentre
      router_external: true

  public-net-subnet:
    type: OS::Neutron::Subnet
    properties:
      name: public-subnet
      network_id: { get_resource: public-net }
      cidr: 192.168.24.0/24
      allocation_pools: [{"start": "192.168.24.100", "end": "192.168.24.120"}]
      enable_dhcp: false
      gateway_ip: "192.168.24.1"
   
  int-green:
    description: internal network
    type: OS::Neutron::Net
    properties:
      name: int-green

  int-green-subnet:
    type: OS::Neutron::Subnet
    properties:
      name: int-green-subnet
      network_id: { get_resource: int-green }
      cidr: 30.0.0.0/24
      dns_nameservers: ["8.8.8.8"]

  router-green:
    type: OS::Neutron::Router
    properties:
      name: route-green
      external_gateway_info: { network: { get_resource: public-net }}
 
  router-green-interface:
    type: OS::Neutron::RouterInterface
    properties:
      router: { get_resource: router-green }
      subnet: { get_resource: int-green-subnet }

environment.yaml

resource_registry:

  "OS::Nova::Server::Cirros": ./simple-stack.yaml

simple-stack.yaml

heat_template_version: 2016-10-14

description: Simple template to deploy a single compute instance. Need to change image name

parameters:
  metadata:
    type: json

  image:
    type: string
    description: Image name or id
    default: cirros

  key:
    type: string
    default: psachin-key

  flavor-cirros:
    type: string
    default: flavor-cirros

  sec-group:
    type: string
    default: ping-ssh-sec-group

  internal-network:
    type: string
    default: int-green

  external-network:
    type: string
    default: public-net
 
resources:
  psachin_instance-1:
    type: OS::Nova::Server
    properties:
      key_name: { get_param: key }
      image: { get_param: image }
      flavor: { get_param: flavor-cirros}
      metadata: {get_param: metadata}
      networks:
        - port: { get_resource: instance_port }

  instance_port:
    type: OS::Neutron::Port
    properties:
      network: { get_param: internal-network }
      security_groups: [ { get_param: sec-group } ]

  floating_ip:
    type: OS::Neutron::FloatingIP
    properties:
      floating_network: { get_param: external-network }
      port_id: { get_resource: instance_port }

  floating_ip_assoc:
    type: OS::Neutron::FloatingIPAssociation
    properties:
      floatingip_id: { get_resource: floating_ip }
      port_id: { get_resource: instance_port }

template.yaml

heat_template_version: 2016-10-14
description: Example auto scale group, policy and alarm
resources:
  scaleup_group:
    type: OS::Heat::AutoScalingGroup
    properties:
      cooldown: 60
      desired_capacity: 1
      max_size: 3
      min_size: 1
      resource:
        type: OS::Nova::Server::Cirros
        properties:
          metadata: {"metering.server_group": {get_param: "OS::stack_id"}}

  scaleup_policy:
    type: OS::Heat::ScalingPolicy
    properties:
      adjustment_type: change_in_capacity
      auto_scaling_group_id: { get_resource: scaleup_group }
      cooldown: 60
      scaling_adjustment: 1

  scaledown_policy:
    type: OS::Heat::ScalingPolicy
    properties:
      adjustment_type: change_in_capacity
      auto_scaling_group_id: { get_resource: scaleup_group }
      cooldown: 60
      scaling_adjustment: -1

  cpu_alarm_high:
    type: OS::Aodh::GnocchiAggregationByResourcesAlarm
    properties:
      description: Scale up if CPU > 80%
      metric: cpu_util
      aggregation_method: mean
      granularity: 300
      evaluation_periods: 1
      threshold: 50
      resource_type: instance
      comparison_operator: gt
      ok_actions: ['log://']
      insufficient_data_actions: ['log://']
      alarm_actions:
        - str_replace:
            template: trust+url
            params:
              url: {get_attr: [scaleup_policy, signal_url]}
      query:
        str_replace:
          template: '{"=": {"server_group": "stack_id"}}'
          params:
            stack_id: {get_param: "OS::stack_id"}

  cpu_alarm_low:
    type: OS::Aodh::GnocchiAggregationByResourcesAlarm
    properties:
      metric: cpu_util
      aggregation_method: mean
      granularity: 300
      evaluation_periods: 1
      threshold: 5
      resource_type: instance
      comparison_operator: le
      ok_actions: ['log://']
      insufficient_data_actions: ['log://']
      alarm_actions:
        - str_replace:
            template: trust+url
            params:
              url: {get_attr: [scaledown_policy, signal_url]}
      query:
        str_replace:
          template: '{"=": {"server_group": "stack_id"}}'
          params:
            stack_id: {get_param: "OS::stack_id"}

outputs:
  scaleup_policy_signal_url:
    value: {get_attr: [scaleup_policy, signal_url]}

  scaledown_policy_signal_url:
    value: {get_attr: [scaledown_policy, signal_url]}

Download image

curl http://download.cirros-cloud.net/0.3.5/cirros-0.3.5-x86_64-disk.img -o cirros-0.3.5-x86_64-disk.img

Create glance image

openstack image create --public --container-format bare --file cirros-0.3.5-x86_64-disk.img cirros

Create flavor, networks, sec-group etc.

openstack stack create -t common.yaml common-stack

Create autoscale stack

openstack --debug stack create -t template.yaml -e environment.yaml autoscale-stack

Stack events

[stack@undercloud ~]$ openstack stack event list autoscale-stack
2017-09-11 13:02:59Z [autoscale-stack]: CREATE_IN_PROGRESS  Stack CREATE started
2017-09-11 13:02:59Z [autoscale-stack.scaleup_group]: CREATE_IN_PROGRESS  state changed
2017-09-11 13:03:20Z [autoscale-stack.scaleup_group]: CREATE_COMPLETE  state changed
2017-09-11 13:03:20Z [autoscale-stack.scaledown_policy]: CREATE_IN_PROGRESS  state changed
2017-09-11 13:03:20Z [autoscale-stack.scaleup_policy]: CREATE_IN_PROGRESS  state changed
2017-09-11 13:03:21Z [autoscale-stack.scaledown_policy]: CREATE_COMPLETE  state changed
2017-09-11 13:03:21Z [autoscale-stack.cpu_alarm_low]: CREATE_IN_PROGRESS  state changed
2017-09-11 13:03:21Z [autoscale-stack.scaleup_policy]: CREATE_COMPLETE  state changed
2017-09-11 13:03:21Z [autoscale-stack.cpu_alarm_high]: CREATE_IN_PROGRESS  state changed
2017-09-11 13:03:29Z [autoscale-stack.cpu_alarm_high]: CREATE_COMPLETE  state changed
2017-09-11 13:03:30Z [autoscale-stack.cpu_alarm_low]: CREATE_COMPLETE  state changed
2017-09-11 13:03:30Z [autoscale-stack]: CREATE_COMPLETE  Stack CREATE completed successfully
2017-09-11 13:23:06Z [autoscale-stack.scaleup_policy]: SIGNAL_COMPLETE  alarm state changed from insufficient data to alarm (Transition to alarm due to 1 samples outside threshold, most recent: 99.3633665171)
2017-09-11 13:26:22Z [autoscale-stack.scaleup_policy]: SIGNAL_COMPLETE  alarm state changed from alarm to alarm (Remaining as alarm due to 1 samples outside threshold, most recent: 99.3633665171)
2017-09-11 13:44:08Z [autoscale-stack.scaledown_policy]: SIGNAL_COMPLETE  alarm state changed from ok to alarm (Transition to alarm due to 1 samples outside threshold, most recent: 2.57545880786)
2017-09-11 13:46:41Z [autoscale-stack.scaledown_policy]: SIGNAL_COMPLETE  alarm state changed from alarm to alarm (Remaining as alarm due to 1 samples outside threshold, most recent: 2.57545880786)