community.aws.ec2_asg module – Create or delete AWS AutoScaling Groups (ASGs)

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_asg.

New in version 1.0.0: of community.aws

Synopsis

  • Can create or delete AWS AutoScaling Groups.

  • Can be used with the community.aws.ec2_lc module to manage Launch Configurations.

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

availability_zones

list / elements=string

List of availability zone names in which to create the group.

Defaults to all the availability zones in the region if vpc_zone_identifier is not set.

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.

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

decrement_desired_capacity

boolean

added in 3.2.0 of community.aws

Indicates whether the AutoScalingGroup decrements the desired capacity value by the number of instances detached.

Choices:

  • no ← (default)

  • yes

default_cooldown

integer

The number of seconds after a scaling activity completes before another can begin.

Default: 300

desired_capacity

integer

Desired number of instances in group, if unspecified then the current group value will be used.

detach_instances

list / elements=string

added in 3.2.0 of community.aws

Removes one or more instances from the specified AutoScalingGroup.

If decrement_desired_capacity flag is not set, new instance(s) are launched to replace the detached instance(s).

If a Classic Load Balancer is attached to the AutoScalingGroup, the instances are also deregistered from the load balancer.

If there are target groups attached to the AutoScalingGroup, the instances are also deregistered from the target groups.

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.

health_check_period

integer

Length of time in seconds after a new EC2 instance comes into service that Auto Scaling starts checking its health.

Default: 300

health_check_type

string

The service you want the health status from, Amazon EC2 or Elastic Load Balancer.

Choices:

  • EC2 ← (default)

  • ELB

launch_config_name

string

Name of the Launch configuration to use for the group. See the community.aws.ec2_lc) module for managing these.

If unspecified then the current group value will be used. One of launch_config_name or launch_template must be provided.

launch_template

dictionary

Dictionary describing the Launch Template to use

launch_template_id

string

The id of the launch template. Only one of launch_template_name or launch_template_id is required.

launch_template_name

string

The name of the launch template. Only one of launch_template_name or launch_template_id is required.

version

string

The version number of the launch template to use.

Defaults to latest version if not provided.

lc_check

boolean

Check to make sure instances that are being replaced with replace_instances do not already have the current launch_config.

Choices:

  • no

  • yes ← (default)

load_balancers

list / elements=string

List of ELB names to use for the group. Use for classic load balancers.

lt_check

boolean

Check to make sure instances that are being replaced with replace_instances do not already have the current launch_template or I(launch_template version.

Choices:

  • no

  • yes ← (default)

max_instance_lifetime

integer

The maximum amount of time, in seconds, that an instance can be in service.

Maximum instance lifetime must be equal to 0, between 604800 and 31536000 seconds (inclusive), or not specified.

Value of 0 removes lifetime restriction.

max_size

integer

Maximum number of instances in group, if unspecified then the current group value will be used.

metrics_collection

boolean

Enable ASG metrics collection.

Choices:

  • no ← (default)

  • yes

metrics_granularity

string

When metrics_collection=true this will determine the granularity of metrics collected by CloudWatch.

Default: “1Minute”

metrics_list

list / elements=string

List of autoscaling metrics to collect when metrics_collection=true.

Default: [“GroupMinSize”, “GroupMaxSize”, “GroupDesiredCapacity”, “GroupInServiceInstances”, “GroupPendingInstances”, “GroupStandbyInstances”, “GroupTerminatingInstances”, “GroupTotalInstances”]

min_size

integer

Minimum number of instances in group, if unspecified then the current group value will be used.

mixed_instances_policy

dictionary

A mixed instance policy to use for the ASG.

Only used when the ASG is configured to use a Launch Template (launch_template).

See also https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-autoscaling-autoscalinggroup-mixedinstancespolicy.html

instance_types

list / elements=string

A list of instance_types.

instances_distribution

dictionary

added in 1.5.0 of community.aws

Specifies the distribution of On-Demand Instances and Spot Instances, the maximum price to pay for Spot Instances, and how the Auto Scaling group allocates instance types to fulfill On-Demand and Spot capacity.

See also https://docs.aws.amazon.com/autoscaling/ec2/APIReference/API_InstancesDistribution.html

on_demand_allocation_strategy

string

added in 1.5.0 of community.aws

Indicates how to allocate instance types to fulfill On-Demand capacity.

on_demand_base_capacity

integer

added in 1.5.0 of community.aws

The minimum amount of the Auto Scaling group’s capacity that must be fulfilled by On-Demand Instances. This base portion is provisioned first as your group scales.

Default if not set is 0. If you leave it set to 0, On-Demand Instances are launched as a percentage of the Auto Scaling group’s desired capacity, per the OnDemandPercentageAboveBaseCapacity setting.

on_demand_percentage_above_base_capacity

integer

added in 1.5.0 of community.aws

Controls the percentages of On-Demand Instances and Spot Instances for your additional capacity beyond OnDemandBaseCapacity.

Default if not set is 100. If you leave it set to 100, the percentages are 100% for On-Demand Instances and 0% for Spot Instances.

Valid range: 0 to 100

spot_allocation_strategy

string

added in 1.5.0 of community.aws

Indicates how to allocate instances across Spot Instance pools.

spot_instance_pools

integer

added in 1.5.0 of community.aws

The number of Spot Instance pools across which to allocate your Spot Instances. The Spot pools are determined from the different instance types in the Overrides array of LaunchTemplate. Default if not set is 2.

Used only when the Spot allocation strategy is lowest-price.

Valid Range: Minimum value of 1. Maximum value of 20.

spot_max_price

string

added in 1.5.0 of community.aws

The maximum price per unit hour that you are willing to pay for a Spot Instance.

If you leave the value of this parameter blank (which is the default), the maximum Spot price is set at the On-Demand price.

To remove a value that you previously set, include the parameter but leave the value blank.

name

string / required

Unique name for group to be created or deleted.

notification_topic

string

A SNS topic ARN to send auto scaling notifications to.

notification_types

list / elements=string

A list of auto scaling events to trigger notifications on.

Default: [“autoscaling:EC2_INSTANCE_LAUNCH”, “autoscaling:EC2_INSTANCE_LAUNCH_ERROR”, “autoscaling:EC2_INSTANCE_TERMINATE”, “autoscaling:EC2_INSTANCE_TERMINATE_ERROR”]

placement_group

string

Physical location of your cluster placement group created in Amazon EC2.

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.

purge_tags

boolean

added in 3.2.0 of community.aws

If true, existing tags will be purged from the resource to match exactly what is defined by tags parameter.

If the tags parameter is not set then tags will not be modified.

Choices:

  • no ← (default)

  • yes

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

replace_all_instances

boolean

In a rolling fashion, replace all instances that used the old launch configuration with one from the new launch configuration. It increases the ASG size by replace_batch_size, waits for the new instances to be up and running. After that, it terminates a batch of old instances, waits for the replacements, and repeats, until all old instances are replaced. Once that’s done the ASG size is reduced back to the expected size.

Choices:

  • no ← (default)

  • yes

replace_batch_size

integer

Number of instances you’d like to replace at a time. Used with replace_all_instances.

Default: 1

replace_instances

list / elements=string

List of instance_ids belonging to the named AutoScalingGroup that you would like to terminate and be replaced with instances matching the current launch configuration.

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 instance.

Choices:

  • present ← (default)

  • absent

suspend_processes

list / elements=string

A list of scaling processes to suspend.

Valid values include:

Launch, Terminate, HealthCheck, ReplaceUnhealthy, AZRebalance, AlarmNotification, ScheduledActions, AddToLoadBalancer

Full documentation of valid values can be found in the AWS documentation:

https://docs.aws.amazon.com/autoscaling/ec2/userguide/as-suspend-resume-processes.html

Default: []

tags

list / elements=dictionary

A list of tags to add to the Auto Scale Group.

Optional key is propagate_at_launch, which defaults to true.

When propagate_at_launch is true the tags will be propagated to the Instances created.

target_group_arns

list / elements=string

List of target group ARNs to use for the group. Use for application load balancers.

termination_policies

list / elements=string

An ordered list of criteria used for selecting instances to be removed from the Auto Scaling group when reducing capacity.

Using termination_policies=Default when modifying an existing AutoScalingGroup will result in the existing policy being retained instead of changed to Default.

Valid values include: Default, OldestInstance, NewestInstance, OldestLaunchConfiguration, ClosestToNextInstanceHour

Full documentation of valid values can be found in the AWS documentation:

https://docs.aws.amazon.com/autoscaling/ec2/userguide/as-instance-termination.html#custom-termination-policy

Default: “Default”

validate_certs

boolean

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

Choices:

  • no

  • yes ← (default)

vpc_zone_identifier

list / elements=string

List of VPC subnets to use

wait_for_instances

boolean

Wait for the ASG instances to be in a ready state before exiting. If instances are behind an ELB, it will wait until the ELB determines all instances have a lifecycle_state of “InService” and a health_status of “Healthy”.

Choices:

  • no

  • yes ← (default)

wait_timeout

integer

How long to wait for instances to become viable when replaced. If you experience the error “Waited too long for ELB instances to be healthy”, try increasing this value.

Default: 300

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

# Basic configuration with Launch Configuration

- community.aws.ec2_asg:
    name: special
    load_balancers: [ 'lb1', 'lb2' ]
    availability_zones: [ 'eu-west-1a', 'eu-west-1b' ]
    launch_config_name: 'lc-1'
    min_size: 1
    max_size: 10
    desired_capacity: 5
    vpc_zone_identifier: [ 'subnet-abcd1234', 'subnet-1a2b3c4d' ]
    tags:
      - environment: production
        propagate_at_launch: no

# Rolling ASG Updates

# Below is an example of how to assign a new launch config to an ASG and terminate old instances.
#
# All instances in "myasg" that do not have the launch configuration named "my_new_lc" will be terminated in
# a rolling fashion with instances using the current launch configuration, "my_new_lc".
#
# This could also be considered a rolling deploy of a pre-baked AMI.
#
# If this is a newly created group, the instances will not be replaced since all instances
# will have the current launch configuration.

- name: create launch config
  community.aws.ec2_lc:
    name: my_new_lc
    image_id: ami-lkajsf
    key_name: mykey
    region: us-east-1
    security_groups: sg-23423
    instance_type: m1.small
    assign_public_ip: yes

- community.aws.ec2_asg:
    name: myasg
    launch_config_name: my_new_lc
    health_check_period: 60
    health_check_type: ELB
    replace_all_instances: yes
    min_size: 5
    max_size: 5
    desired_capacity: 5
    region: us-east-1

# To only replace a couple of instances instead of all of them, supply a list
# to "replace_instances":

- community.aws.ec2_asg:
    name: myasg
    launch_config_name: my_new_lc
    health_check_period: 60
    health_check_type: ELB
    replace_instances:
    - i-b345231
    - i-24c2931
    min_size: 5
    max_size: 5
    desired_capacity: 5
    region: us-east-1

# Basic Configuration with Launch Template

- community.aws.ec2_asg:
    name: special
    load_balancers: [ 'lb1', 'lb2' ]
    availability_zones: [ 'eu-west-1a', 'eu-west-1b' ]
    launch_template:
        version: '1'
        launch_template_name: 'lt-example'
        launch_template_id: 'lt-123456'
    min_size: 1
    max_size: 10
    desired_capacity: 5
    vpc_zone_identifier: [ 'subnet-abcd1234', 'subnet-1a2b3c4d' ]
    tags:
      - environment: production
        propagate_at_launch: no

# Basic Configuration with Launch Template using mixed instance policy

- community.aws.ec2_asg:
    name: special
    load_balancers: [ 'lb1', 'lb2' ]
    availability_zones: [ 'eu-west-1a', 'eu-west-1b' ]
    launch_template:
        version: '1'
        launch_template_name: 'lt-example'
        launch_template_id: 'lt-123456'
    mixed_instances_policy:
        instance_types:
            - t3a.large
            - t3.large
            - t2.large
        instances_distribution:
            on_demand_percentage_above_base_capacity: 0
            spot_allocation_strategy: capacity-optimized
    min_size: 1
    max_size: 10
    desired_capacity: 5
    vpc_zone_identifier: [ 'subnet-abcd1234', 'subnet-1a2b3c4d' ]
    tags:
      - environment: production
        propagate_at_launch: no

Return Values

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

Key

Description

auto_scaling_group_arn

string

The unique ARN of the autoscaling group

Returned: success

Sample: “arn:aws:autoscaling:us-east-1:123456789012:autoScalingGroup:6a09ad6d-eeee-1234-b987-ee123ced01ad:autoScalingGroupName/myasg”

auto_scaling_group_name

string

The unique name of the auto scaling group

Returned: success

Sample: “myasg”

availability_zones

list / elements=string

The availability zones for the auto scaling group

Returned: success

Sample: [“us-east-1d”]

created_time

string

Timestamp of create time of the auto scaling group

Returned: success

Sample: “2017-11-08T14:41:48.272000+00:00”

default_cooldown

integer

The default cooldown time in seconds.

Returned: success

Sample: 300

desired_capacity

integer

The number of EC2 instances that should be running in this group.

Returned: success

Sample: 3

healthcheck_period

integer

Length of time in seconds after a new EC2 instance comes into service that Auto Scaling starts checking its health.

Returned: success

Sample: 30

healthcheck_type

string

The service you want the health status from, one of “EC2” or “ELB”.

Returned: success

Sample: “ELB”

healthy_instances

integer

Number of instances in a healthy state

Returned: success

Sample: 5

in_service_instances

integer

Number of instances in service

Returned: success

Sample: 3

instance_facts

dictionary

Dictionary of EC2 instances and their status as it relates to the ASG.

Returned: success

Sample: {“i-0123456789012”: {“health_status”: “Healthy”, “launch_config_name”: “public-webapp-production-1”, “lifecycle_state”: “InService”}}

instances

list / elements=string

list of instance IDs in the ASG

Returned: success

Sample: [“i-0123456789012”]

launch_config_name

string

Name of launch configuration associated with the ASG. Same as launch_configuration_name, provided for compatibility with ec2_asg module.

Returned: success

Sample: “public-webapp-production-1”

load_balancers

list / elements=string

List of load balancers names attached to the ASG.

Returned: success

Sample: [“elb-webapp-prod”]

max_instance_lifetime

integer

The maximum amount of time, in seconds, that an instance can be in service.

Returned: success

Sample: 604800

max_size

integer

Maximum size of group

Returned: success

Sample: 3

metrics_collection

list / elements=string

List of enabled AutosSalingGroup metrics

Returned: success

Sample: [{“Granularity”: “1Minute”, “Metric”: “GroupInServiceInstances”}]

min_size

integer

Minimum size of group

Returned: success

Sample: 1

mixed_instances_policy

list / elements=string

Returns the list of instance types if a mixed instances policy is set.

Returned: success

Sample: [“t3.micro”, “t3a.micro”]

mixed_instances_policy_full

dictionary

Returns the full dictionary representation of the mixed instances policy if a mixed instances policy is set.

Returned: success

Sample: {“instances_distribution”: {“on_demand_allocation_strategy”: “prioritized”, “on_demand_base_capacity”: 0, “on_demand_percentage_above_base_capacity”: 0, “spot_allocation_strategy”: “capacity-optimized”}, “launch_template”: {“launch_template_specification”: {“launch_template_id”: “lt-53c2425cffa544c23”, “launch_template_name”: “random-LaunchTemplate”, “version”: “2”}, “overrides”: [{“instance_type”: “m5.xlarge”}, {“instance_type”: “m5a.xlarge”}]}}

pending_instances

integer

Number of instances in pending state

Returned: success

Sample: 1

tags

list / elements=string

List of tags for the ASG, and whether or not each tag propagates to instances at launch.

Returned: success

Sample: [{“key”: “Name”, “propagate_at_launch”: “true”, “resource_id”: “public-webapp-production-1”, “resource_type”: “auto-scaling-group”, “value”: “public-webapp-production-1”}, {“key”: “env”, “propagate_at_launch”: “true”, “resource_id”: “public-webapp-production-1”, “resource_type”: “auto-scaling-group”, “value”: “production”}]

target_group_arns

list / elements=string

List of ARNs of the target groups that the ASG populates

Returned: success

Sample: [“arn:aws:elasticloadbalancing:ap-southeast-2:123456789012:targetgroup/target-group-host-hello/1a2b3c4d5e6f1a2b”, “arn:aws:elasticloadbalancing:ap-southeast-2:123456789012:targetgroup/target-group-path-world/abcd1234abcd1234”]

target_group_names

list / elements=string

List of names of the target groups that the ASG populates

Returned: success

Sample: [“target-group-host-hello”, “target-group-path-world”]

termination_policies

list / elements=string

A list of termination policies for the group.

Returned: success

Sample: [“Default”]

unhealthy_instances

integer

Number of instances in an unhealthy state

Returned: success

Sample: 0

viable_instances

integer

Number of instances in a viable state

Returned: success

Sample: 1

vpc_zone_identifier

string

VPC zone ID / subnet id for the auto scaling group

Returned: success

Sample: “subnet-a31ef45f”

Authors

  • Gareth Rushgrove (@garethr)