set_desired_capacity

set_desired_capacity(**kwargs)

Sets the size of the specified Auto Scaling group.

If a scale-in activity occurs as a result of a new DesiredCapacity value that is lower than the current size of the group, the Auto Scaling group uses its termination policy to determine which instances to terminate.

For more information, see Manual scaling in the Amazon EC2 Auto Scaling User Guide .

See also: AWS API Documentation

Request Syntax

response = client.set_desired_capacity(
    AutoScalingGroupName='string',
    DesiredCapacity=123,
    HonorCooldown=True|False
)

Parameters

• AutoScalingGroupName (string) --

  [REQUIRED]

  The name of the Auto Scaling group.

• DesiredCapacity (integer) --

  [REQUIRED]

  The desired capacity is the initial capacity of the Auto Scaling group after this operation completes and the capacity it attempts to maintain.

• HonorCooldown (boolean) -- Indicates whether Amazon EC2 Auto Scaling waits for the cooldown period to complete before initiating a scaling activity to set your Auto Scaling group to its new capacity. By default, Amazon EC2 Auto Scaling does not honor the cooldown period during manual scaling activities.

Returns

None

Exceptions

• AutoScaling.Client.exceptions.ScalingActivityInProgressFault
• AutoScaling.Client.exceptions.ResourceContentionFault

Examples

This example sets the desired capacity for the specified Auto Scaling group.

response = client.set_desired_capacity(
    AutoScalingGroupName='my-auto-scaling-group',
    DesiredCapacity=2,
    HonorCooldown=True,
)

print(response)

Expected Output:

{
    'ResponseMetadata': {
        '...': '...',
    },
}