google.cloud.gcp_compute_autoscaler – Creates a GCP Autoscaler

Note

This plugin is part of the google.cloud collection.

To install it use: ansible-galaxy collection install google.cloud.

To use it in a playbook, specify: google.cloud.gcp_compute_autoscaler.

Synopsis

  • Represents an Autoscaler resource.

  • Autoscalers allow you to automatically scale virtual machine instances in managed instance groups according to an autoscaling policy that you define.

Requirements

The below requirements are needed on the host that executes this module.

  • python >= 2.6

  • requests >= 2.18.4

  • google-auth >= 1.3.0

Parameters

Parameter Choices/Defaults Comments
auth_kind
string / required
    Choices:
  • application
  • machineaccount
  • serviceaccount
The type of credential used.
autoscaling_policy
dictionary / required
The configuration parameters for the autoscaling algorithm. You can define one or more of the policies for an autoscaler: cpuUtilization, customMetricUtilizations, and loadBalancingUtilization.
If none of these are specified, the default will be to autoscale based on cpuUtilization to 0.6 or 60%.
cool_down_period_sec
integer
Default:
"60"
The number of seconds that the autoscaler should wait before it starts collecting information from a new instance. This prevents the autoscaler from collecting information when the instance is initializing, during which the collected usage would not be reliable. The default time autoscaler waits is 60 seconds.
Virtual machine initialization times might vary because of numerous factors. We recommend that you test how long an instance may take to initialize. To do this, create an instance and time the startup process.

aliases: cooldownPeriod
cpu_utilization
dictionary
Defines the CPU utilization policy that allows the autoscaler to scale based on the average CPU utilization of a managed instance group.
utilization_target
string
The target CPU utilization that the autoscaler should maintain.
Must be a float value in the range (0, 1]. If not specified, the default is 0.6.
If the CPU level is below the target utilization, the autoscaler scales down the number of instances until it reaches the minimum number of instances you specified or until the average CPU of your instances reaches the target utilization.
If the average CPU is above the target utilization, the autoscaler scales up until it reaches the maximum number of instances you specified or until the average utilization reaches the target utilization.

aliases: target
custom_metric_utilizations
list / elements=dictionary
Configuration parameters of autoscaling based on a custom metric.

aliases: metric
metric
string / required
The identifier (type) of the Stackdriver Monitoring metric.
The metric cannot have negative values.
The metric must have a value type of INT64 or DOUBLE.

aliases: name
utilization_target
string
The target value of the metric that autoscaler should maintain. This must be a positive value. A utilization metric scales number of virtual machines handling requests to increase or decrease proportionally to the metric.
For example, a good metric to use as a utilizationTarget is www.googleapis.com/compute/instance/network/received_bytes_count.
The autoscaler will work to keep this value constant for each of the instances.

aliases: target
utilization_target_type
string
Defines how target utilization value is expressed for a Stackdriver Monitoring metric.
Some valid choices include: "GAUGE", "DELTA_PER_SECOND", "DELTA_PER_MINUTE"

aliases: type
load_balancing_utilization
dictionary
Configuration parameters of autoscaling based on a load balancer.
utilization_target
string
Fraction of backend capacity utilization (set in HTTP(s) load balancing configuration) that autoscaler should maintain. Must be a positive float value. If not defined, the default is 0.8.

aliases: target
max_num_replicas
integer / required
The maximum number of instances that the autoscaler can scale up to. This is required when creating or updating an autoscaler. The maximum number of replicas should not be lower than minimal number of replicas.

aliases: maxReplicas
min_num_replicas
integer
The minimum number of replicas that the autoscaler can scale down to. This cannot be less than 0. If not provided, autoscaler will choose a default value depending on maximum number of instances allowed.

aliases: minReplicas
mode
string
Default:
"ON"
Defines operating mode for this policy.
Some valid choices include: "OFF", "ONLY_UP", "ON"
description
string
An optional description of this resource.
env_type
string
Specifies which Ansible environment you're running this module within.
This should not be set unless you know what you're doing.
This only alters the User Agent string for any API requests.
name
string / required
Name of the resource. The name must be 1-63 characters long and match the regular expression `[a-z]([-a-z0-9]*[a-z0-9])?` which means the first character must be a lowercase letter, and all following characters must be a dash, lowercase letter, or digit, except the last character, which cannot be a dash.
project
string
The Google Cloud Platform project to use.
scopes
list / elements=string
Array of scopes to be used
service_account_contents
jsonarg
The contents of a Service Account JSON file, either in a dictionary or as a JSON string that represents it.
service_account_email
string
An optional service account email address if machineaccount is selected and the user does not wish to use the default email.
service_account_file
path
The path of a Service Account JSON file if serviceaccount is selected as type.
state
string
    Choices:
  • present ←
  • absent
Whether the given object should exist in GCP
target
dictionary / required
URL of the managed instance group that this autoscaler will scale.
This field represents a link to a InstanceGroupManager resource in GCP. It can be specified in two ways. First, you can place a dictionary with key 'selfLink' and value of your resource's selfLink Alternatively, you can add `register: name-of-resource` to a gcp_compute_instance_group_manager task and then set this target field to "{{ name-of-resource }}"
zone
string / required
URL of the zone where the instance group resides.

Notes

Note

  • API Reference: https://cloud.google.com/compute/docs/reference/rest/v1/autoscalers

  • Autoscaling Groups of Instances: https://cloud.google.com/compute/docs/autoscaler/

  • for authentication, you can set service_account_file using the gcp_service_account_file env variable.

  • for authentication, you can set service_account_contents using the GCP_SERVICE_ACCOUNT_CONTENTS env variable.

  • For authentication, you can set service_account_email using the GCP_SERVICE_ACCOUNT_EMAIL env variable.

  • For authentication, you can set auth_kind using the GCP_AUTH_KIND env variable.

  • For authentication, you can set scopes using the GCP_SCOPES env variable.

  • Environment variables values will only be used if the playbook values are not set.

  • The service_account_email and service_account_file options are mutually exclusive.

Examples

- name: create a network
  google.cloud.gcp_compute_network:
    name: network-instancetemplate
    project: "{{ gcp_project }}"
    auth_kind: "{{ gcp_cred_kind }}"
    service_account_file: "{{ gcp_cred_file }}"
    state: present
  register: network

- name: create a address
  google.cloud.gcp_compute_address:
    name: address-instancetemplate
    region: us-central1
    project: "{{ gcp_project }}"
    auth_kind: "{{ gcp_cred_kind }}"
    service_account_file: "{{ gcp_cred_file }}"
    state: present
  register: address

- name: create a instance template
  google.cloud.gcp_compute_instance_template:
    name: "{{ resource_name }}"
    properties:
      disks:
      - auto_delete: 'true'
        boot: 'true'
        initialize_params:
          source_image: projects/ubuntu-os-cloud/global/images/family/ubuntu-1604-lts
      machine_type: n1-standard-1
      network_interfaces:
      - network: "{{ network }}"
        access_configs:
        - name: test-config
          type: ONE_TO_ONE_NAT
          nat_ip: "{{ address }}"
    project: "{{ gcp_project }}"
    auth_kind: "{{ gcp_cred_kind }}"
    service_account_file: "{{ gcp_cred_file }}"
    state: present
  register: instancetemplate

- name: create a instance group manager
  google.cloud.gcp_compute_instance_group_manager:
    name: "{{ resource_name }}"
    base_instance_name: test1-child
    instance_template: "{{ instancetemplate }}"
    target_size: 3
    zone: us-central1-a
    project: "{{ gcp_project }}"
    auth_kind: "{{ gcp_cred_kind }}"
    service_account_file: "{{ gcp_cred_file }}"
    state: present
  register: igm

- name: create a autoscaler
  google.cloud.gcp_compute_autoscaler:
    name: test_object
    zone: us-central1-a
    target: "{{ igm }}"
    autoscaling_policy:
      max_num_replicas: 5
      min_num_replicas: 1
      cool_down_period_sec: 60
      cpu_utilization:
        utilization_target: 0.5
    project: test_project
    auth_kind: serviceaccount
    service_account_file: "/tmp/auth.pem"
    state: present

Return Values

Common return values are documented here, the following are the fields unique to this module:

Key Returned Description
autoscalingPolicy
complex
success
The configuration parameters for the autoscaling algorithm. You can define one or more of the policies for an autoscaler: cpuUtilization, customMetricUtilizations, and loadBalancingUtilization.
If none of these are specified, the default will be to autoscale based on cpuUtilization to 0.6 or 60%.

 
coolDownPeriodSec
integer
success
The number of seconds that the autoscaler should wait before it starts collecting information from a new instance. This prevents the autoscaler from collecting information when the instance is initializing, during which the collected usage would not be reliable. The default time autoscaler waits is 60 seconds.
Virtual machine initialization times might vary because of numerous factors. We recommend that you test how long an instance may take to initialize. To do this, create an instance and time the startup process.

 
cpuUtilization
complex
success
Defines the CPU utilization policy that allows the autoscaler to scale based on the average CPU utilization of a managed instance group.

   
utilizationTarget
string
success
The target CPU utilization that the autoscaler should maintain.
Must be a float value in the range (0, 1]. If not specified, the default is 0.6.
If the CPU level is below the target utilization, the autoscaler scales down the number of instances until it reaches the minimum number of instances you specified or until the average CPU of your instances reaches the target utilization.
If the average CPU is above the target utilization, the autoscaler scales up until it reaches the maximum number of instances you specified or until the average utilization reaches the target utilization.

 
customMetricUtilizations
complex
success
Configuration parameters of autoscaling based on a custom metric.

   
metric
string
success
The identifier (type) of the Stackdriver Monitoring metric.
The metric cannot have negative values.
The metric must have a value type of INT64 or DOUBLE.

   
utilizationTarget
string
success
The target value of the metric that autoscaler should maintain. This must be a positive value. A utilization metric scales number of virtual machines handling requests to increase or decrease proportionally to the metric.
For example, a good metric to use as a utilizationTarget is www.googleapis.com/compute/instance/network/received_bytes_count.
The autoscaler will work to keep this value constant for each of the instances.

   
utilizationTargetType
string
success
Defines how target utilization value is expressed for a Stackdriver Monitoring metric.

 
loadBalancingUtilization
complex
success
Configuration parameters of autoscaling based on a load balancer.

   
utilizationTarget
string
success
Fraction of backend capacity utilization (set in HTTP(s) load balancing configuration) that autoscaler should maintain. Must be a positive float value. If not defined, the default is 0.8.

 
maxNumReplicas
integer
success
The maximum number of instances that the autoscaler can scale up to. This is required when creating or updating an autoscaler. The maximum number of replicas should not be lower than minimal number of replicas.

 
minNumReplicas
integer
success
The minimum number of replicas that the autoscaler can scale down to. This cannot be less than 0. If not provided, autoscaler will choose a default value depending on maximum number of instances allowed.

 
mode
string
success
Defines operating mode for this policy.

creationTimestamp
string
success
Creation timestamp in RFC3339 text format.

description
string
success
An optional description of this resource.

id
integer
success
Unique identifier for the resource.

name
string
success
Name of the resource. The name must be 1-63 characters long and match the regular expression `[a-z]([-a-z0-9]*[a-z0-9])?` which means the first character must be a lowercase letter, and all following characters must be a dash, lowercase letter, or digit, except the last character, which cannot be a dash.

target
dictionary
success
URL of the managed instance group that this autoscaler will scale.

zone
string
success
URL of the zone where the instance group resides.



Authors

  • Google Inc. (@googlecloudplatform)