community.aws.ec2_scaling_policy module – Create or delete AWS scaling policies for Autoscaling groups

Note

This module is part of the community.aws collection (version 3.2.1).

You might already have this collection installed if you are using the ansible package. It is not included in ansible-core. To check whether it is installed, run ansible-galaxy collection list.

To install it, use: ansible-galaxy collection install community.aws.

To use it in a playbook, specify: community.aws.ec2_scaling_policy.

New in version 1.0.0: of community.aws

Synopsis

  • Can create or delete scaling policies for autoscaling groups.

  • Referenced autoscaling groups must already exist.

Requirements

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

  • python >= 3.6

  • boto3 >= 1.16.0

  • botocore >= 1.19.0

Parameters

Parameter

Comments

adjustment_type

string

The type of change in capacity of the autoscaling group.

Required if state is present.

Choices:

  • ChangeInCapacity

  • ExactCapacity

  • PercentChangeInCapacity

asg_name

string

Name of the associated autoscaling group.

Required if state is present.

aws_access_key

aliases: ec2_access_key, access_key

string

AWS access key. If not set then the value of the AWS_ACCESS_KEY_ID, AWS_ACCESS_KEY or EC2_ACCESS_KEY environment variable is used.

If profile is set this parameter is ignored.

Passing the aws_access_key and profile options at the same time has been deprecated and the options will be made mutually exclusive after 2022-06-01.

aws_ca_bundle

path

The location of a CA Bundle to use when validating SSL certificates.

Not used by boto 2 based modules.

Note: The CA Bundle is read ‘module’ side and may need to be explicitly copied from the controller if not run locally.

aws_config

dictionary

A dictionary to modify the botocore configuration.

Parameters can be found at https://botocore.amazonaws.com/v1/documentation/api/latest/reference/config.html#botocore.config.Config.

Only the ‘user_agent’ key is used for boto modules. See http://boto.cloudhackers.com/en/latest/boto_config_tut.html#boto for more boto configuration.

aws_secret_key

aliases: ec2_secret_key, secret_key

string

AWS secret key. If not set then the value of the AWS_SECRET_ACCESS_KEY, AWS_SECRET_KEY, or EC2_SECRET_KEY environment variable is used.

If profile is set this parameter is ignored.

Passing the aws_secret_key and profile options at the same time has been deprecated and the options will be made mutually exclusive after 2022-06-01.

cooldown

integer

The minimum period of time (in seconds) between which autoscaling actions can take place.

Only used when policy_type is SimpleScaling.

debug_botocore_endpoint_logs

boolean

Use a botocore.endpoint logger to parse the unique (rather than total) “resource:action” API calls made during a task, outputing the set to the resource_actions key in the task results. Use the aws_resource_action callback to output to total list made during a playbook. The ANSIBLE_DEBUG_BOTOCORE_LOGS environment variable may also be used.

Choices:

  • no ← (default)

  • yes

ec2_url

aliases: aws_endpoint_url, endpoint_url

string

URL to use to connect to EC2 or your Eucalyptus cloud (by default the module will use EC2 endpoints). Ignored for modules where region is required. Must be specified for all other modules if region is not used. If not set then the value of the EC2_URL environment variable, if any, is used.

estimated_instance_warmup

integer

The estimated time, in seconds, until a newly launched instance can contribute to the CloudWatch metrics.

metric_aggregation

string

The aggregation type for the CloudWatch metrics.

Only used when policy_type is not SimpleScaling.

Choices:

  • Minimum

  • Maximum

  • Average ← (default)

min_adjustment_step

integer

Minimum amount of adjustment when policy is triggered.

Only used when adjustment_type is PercentChangeInCapacity.

name

string / required

Unique name for the scaling policy.

policy_type

string

Auto scaling adjustment policy.

Choices:

  • StepScaling

  • SimpleScaling ← (default)

profile

aliases: aws_profile

string

Using profile will override aws_access_key, aws_secret_key and security_token and support for passing them at the same time as profile has been deprecated.

aws_access_key, aws_secret_key and security_token will be made mutually exclusive with profile after 2022-06-01.

region

aliases: aws_region, ec2_region

string

The AWS region to use. If not specified then the value of the AWS_REGION or EC2_REGION environment variable, if any, is used. See http://docs.aws.amazon.com/general/latest/gr/rande.html#ec2_region

scaling_adjustment

integer

The amount by which the autoscaling group is adjusted by the policy.

A negative number has the effect of scaling down the ASG.

Units are numbers of instances for ExactCapacity or ChangeInCapacity or percent of existing instances for PercentChangeInCapacity.

Required when policy_type is SimpleScaling.

security_token

aliases: aws_security_token, access_token

string

AWS STS security token. If not set then the value of the AWS_SECURITY_TOKEN or EC2_SECURITY_TOKEN environment variable is used.

If profile is set this parameter is ignored.

Passing the security_token and profile options at the same time has been deprecated and the options will be made mutually exclusive after 2022-06-01.

state

string

Register or deregister the policy.

Choices:

  • present ← (default)

  • absent

step_adjustments

list / elements=dictionary

list of dicts containing lower_bound, upper_bound and scaling_adjustment

Intervals must not overlap or have a gap between them.

At most, one item can have an undefined lower_bound. If any item has a negative lower_bound, then there must be a step adjustment with an undefined lower_bound.

At most, one item can have an undefined upper_bound. If any item has a positive upper_bound, then there must be a step adjustment with an undefined upper_bound.

The bounds are the amount over the alarm threshold at which the adjustment will trigger. This means that for an alarm threshold of 50, triggering at 75 requires a lower bound of 25. See http://docs.aws.amazon.com/AutoScaling/latest/APIReference/API_StepAdjustment.html.

lower_bound

integer

The lower bound for the difference between the alarm threshold and the CloudWatch metric.

scaling_adjustment

integer / required

The amount by which to scale.

upper_bound

integer

The upper bound for the difference between the alarm threshold and the CloudWatch metric.

validate_certs

boolean

When set to “no”, SSL certificates will not be validated for communication with the AWS APIs.

Choices:

  • no

  • yes ← (default)

Notes

Note

  • If parameters are not set within the module, the following environment variables can be used in decreasing order of precedence AWS_URL or EC2_URL, AWS_PROFILE or AWS_DEFAULT_PROFILE, AWS_ACCESS_KEY_ID or AWS_ACCESS_KEY or EC2_ACCESS_KEY, AWS_SECRET_ACCESS_KEY or AWS_SECRET_KEY or EC2_SECRET_KEY, AWS_SECURITY_TOKEN or EC2_SECURITY_TOKEN, AWS_REGION or EC2_REGION, AWS_CA_BUNDLE

  • When no credentials are explicitly provided the AWS SDK (boto3) that Ansible uses will fall back to its configuration files (typically ~/.aws/credentials). See https://boto3.amazonaws.com/v1/documentation/api/latest/guide/credentials.html for more information.

  • Modules based on the original AWS SDK (boto) may read their default configuration from different files. See https://boto.readthedocs.io/en/latest/boto_config_tut.html for more information.

  • AWS_REGION or EC2_REGION can be typically be used to specify the AWS region, when required, but this can also be defined in the configuration files.

Examples

- name: Simple Scale Down policy
  community.aws.ec2_scaling_policy:
    state: present
    region: US-XXX
    name: "scaledown-policy"
    adjustment_type: "ChangeInCapacity"
    asg_name: "application-asg"
    scaling_adjustment: -1
    min_adjustment_step: 1
    cooldown: 300

# For an alarm with a breach threshold of 20, the
# following creates a stepped policy:
# From 20-40 (0-20 above threshold), increase by 50% of existing capacity
# From 41-infinity, increase by 100% of existing capacity
- community.aws.ec2_scaling_policy:
    state: present
    region: US-XXX
    name: "step-scale-up-policy"
    policy_type: StepScaling
    metric_aggregation: Maximum
    step_adjustments:
      - upper_bound: 20
        scaling_adjustment: 50
      - lower_bound: 20
        scaling_adjustment: 100
    adjustment_type: "PercentChangeInCapacity"
    asg_name: "application-asg"

Return Values

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

Key

Description

adjustment_type

string

Scaling policy adjustment type

Returned: always

Sample: “PercentChangeInCapacity”

alarms

complex

Cloudwatch alarms related to the policy

Returned: always

alarm_arn

string

ARN of the Cloudwatch alarm

Returned: always

Sample: “arn:aws:cloudwatch:us-east-2:1234567890:alarm:cpu-very-high”

alarm_name

string

name of the Cloudwatch alarm

Returned: always

Sample: “cpu-very-high”

arn

string

ARN of the scaling policy. Provided for backward compatibility, value is the same as policy_arn

Returned: always

Sample: “arn:aws:autoscaling:us-east-2:123456789012:scalingPolicy:59e37526-bd27-42cf-adca-5cd3d90bc3b9:autoScalingGroupName/app-asg:policyName/app-policy”

as_name

string

Auto Scaling Group name. Provided for backward compatibility, value is the same as auto_scaling_group_name

Returned: always

Sample: “app-asg”

auto_scaling_group_name

string

Name of Auto Scaling Group

Returned: always

Sample: “app-asg”

metric_aggregation_type

string

Method used to aggregate metrics

Returned: when policy_type is StepScaling

Sample: “Maximum”

name

string

Name of the scaling policy. Provided for backward compatibility, value is the same as policy_name

Returned: always

Sample: “app-policy”

policy_arn

string

ARN of scaling policy.

Returned: always

Sample: “arn:aws:autoscaling:us-east-2:123456789012:scalingPolicy:59e37526-bd27-42cf-adca-5cd3d90bc3b9:autoScalingGroupName/app-asg:policyName/app-policy”

policy_name

string

Name of scaling policy

Returned: always

Sample: “app-policy”

policy_type

string

Type of auto scaling policy

Returned: always

Sample: “StepScaling”

scaling_adjustment

integer

Adjustment to make when alarm is triggered

Returned: When policy_type is SimpleScaling

Sample: 1

step_adjustments

complex

List of step adjustments

Returned: always

metric_interval_lower_bound

float

Lower bound for metric interval

Returned: if step has a lower bound

Sample: 20.0

metric_interval_upper_bound

float

Upper bound for metric interval

Returned: if step has an upper bound

Sample: 40.0

scaling_adjustment

integer

Adjustment to make if this step is reached

Returned: always

Sample: 50

Authors

  • Zacharie Eakin (@zeekin)

  • Will Thames (@willthames)