@pulumi/awsx
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TypeScript
import * as aws from "@pulumi/aws";
import * as pulumi from "@pulumi/pulumi";
import * as cloudwatch from "../cloudwatch";
import { AutoScalingGroup } from "./autoscaling";
export type AdjustmentType =
/**
* Increases or decreases the current capacity of the group by the specified number of
* instances. A positive value increases the capacity and a negative adjustment value decreases
* the capacity.
*
* Example: If the current capacity of the group is 3 instances and the adjustment is 5, then
* when this policy is performed, there are 5 instances added to the group for a total of 8
* instances.
*/
"ChangeInCapacity" |
/**
* Changes the current capacity of the group to the specified number of instances. Specify a
* positive value with this adjustment type.
*
* Example: If the current capacity of the group is 3 instances and the adjustment is 5, then
* when this policy is performed, the capacity is set to 5 instances.
*/
"ExactCapacity" |
/**
* Increment or decrement the current capacity of the group by the specified percentage. A
* positive value increases the capacity and a negative value decreases the capacity. If the
* resulting value is not an integer, it is rounded as follows:
*
* * Values greater than 1 are rounded down. For example, 12.7 is rounded to 12.
* * Values between 0 and 1 are rounded to 1. For example, .67 is rounded to 1.
* * Values between 0 and -1 are rounded to -1. For example, -.58 is rounded to -1.
* * Values less than -1 are rounded up. For example, -6.67 is rounded to -6.
*
* Example: If the current capacity is 10 instances and the adjustment is 10 percent, then when
* this policy is performed, 1 instance is added to the group for a total of 11 instances.
*
* With PercentChangeInCapacity, you can also specify the minimum number of instances to scale
* (using the [minAdjustmentMagnitude] parameter). For example, suppose that you create a policy
* that adds 25 percent and you specify a minimum increment of 2 instances. If you have an Auto
* Scaling group with 4 instances and the scaling policy is executed, 25 percent of 4 is 1
* instance. However, because you specified a minimum increment of 2, there are 2 instances
* added.
*/
"PercentChangeInCapacity";
export interface ScalingSteps {
/**
* Optional upper steps for this policy normally describing how to scale-out the
* AutoScalingGroup. This must be non-empty. An alarm will be created that will fire when the
* desired metric goes greater-than-or-equal-to the value of the first step's `value`. Each
* step ranges from it's `value` (inclusive) to the `value` of the next step (exclusive). For
* the last step, the end part of the range is `Infinity`.
*
* Depending on which step range the alarm triggers for will determine which particular
* [scalingAdjustment] will be performed.
*
* At least one of `upper` or `lower` must be non-empty. If both are provided, `upper` and
* `lower` must not overlap.
*/
upper?: pulumi.Input<ScalingStep>[];
/**
* Optional lower steps for this step policy normally used to describe how to scale-in the
* AutoScalingGroup. If these are provided then the step policy will create two alarms. One
* for when the upper steps are breached and one for when the lower steps are breached.
*
* The latter alarm will fire when the desired metric goes less-than-or-equal-to the value of
* the first step's `value`. Each step ranges from it's `value` (inclusive) to the `value` of
* the next step (exclusive). For the last step, the end part of the range is `-Infinity`.
*
* Depending on which step range the alarm triggers for will determine which particular
* [scalingAdjustment] will be performed.
*
* At least one of `upper` or `lower` must be non-empty. If both are provided, `upper` and
* `lower` must not overlap.
*/
lower?: pulumi.Input<ScalingStep>[];
}
export interface ScalingStep {
/**
* The threshold value that causes this step to be followed. If this an `upperStep` then values
* `>=` to this will trigger this step's [scalingAdjustment]. If this is a `lowerStep` then
* values `<=` to this will trigger this step's [scalingAdjustment].
*/
value: pulumi.Input<number>;
/**
* The number of members by which to scale, when [value] breached. A
* positive value scales up. A negative value scales down.
*/
adjustment: pulumi.Input<number>;
}
export interface StepScalingPolicyArgs {
/**
* The metric to use to watch for changes. An alarm will be created from this using
* [alarmArgs], which will invoke the actual autoscaling policy when triggered.
*
* Note: the `period` of this metric will be set to `60s` from the default of `300s` to ensure
* events come in in a timely enough manner to allow the ASG to respond accordingly.
*/
metric: cloudwatch.Metric;
/**
* A set of adjustments that manage group scaling.
*/
steps: ScalingSteps;
/**
* When a step scaling or simple scaling policy is executed, it changes the current capacity of
* your Auto Scaling group using the scaling adjustment specified in the policy. A scaling
* adjustment can't change the capacity of the group above the maximum group size or below the
* minimum group size.
*/
adjustmentType: pulumi.Input<AdjustmentType>;
/**
* The estimated time, in seconds, until a newly launched instance will contribute CloudWatch
* metrics. Without a value, AWS will default to the group's specified cooldown period.
*/
estimatedInstanceWarmup?: pulumi.Input<number>;
/**
* The minimum number of instances to scale. If the value of [adjustmentType] is
* ["PercentChangeInCapacity"], the scaling policy changes the DesiredCapacity of the Auto
* Scaling group by at least this many instances. Defaults to `1` if not specified.
*/
minAdjustmentMagnitude?: pulumi.Input<number>;
/**
* The number of periods over which data is compared to the specified threshold before an alarm
* is fired. Defaults to `1` if unspecified.
*/
evaluationPeriods?: pulumi.Input<number>;
}
/**
* Step scaling policies increase or decrease the current capacity of your Auto Scaling group based
* on a set of scaling adjustments, known as step adjustments. The adjustments vary based on the
* size of the alarm breach.
*
* For example, consider the following StepScaling description for an ASG that has both a current
* capacity and a desired capacity of 10. The current and desired capacity is maintained while the
* aggregated metric value is greater than 40 and less than 60.
*
* ```ts
* const policy = {
* // ... other values
* adjustmentType: "PercentChangeInCapacity",
* steps: {
* upper: [{ value: 60, adjustment: 10 }, { value: 70, adjustment: 30 }],
* lower: [{ value: 40, adjustment: -10 }, { value: 30, adjustment: -30 }]
* },
* };
* ```
*
* If the metric value gets to 60, Application Auto Scaling increases the desired capacity of the
* group by 1, to 11. That's based on the second step adjustment of the scale-out policy (add 10
* percent of 10). After the new capacity is added, Application Auto Scaling increases the current
* capacity to 11. If the metric value rises to 70 even after this increase in capacity, Application
* Auto Scaling increases the target capacity by 3, to 14. That's based on the third step adjustment
* of the scale-out policy (add 30 percent of 11, 3.3, rounded down to 3).
*
* If the metric value gets to 40, Application Auto Scaling decreases the target capacity by 1, to
* 13, based on the second step adjustment of the scale-in policy (remove 10 percent of 14, 1.4,
* rounded down to 1). If the metric value falls to 30 even after this decrease in capacity,
* Application Auto Scaling decreases the target capacity by 3, to 10, based on the third step
* adjustment of the scale-in policy (remove 30 percent of 13, 3.9, rounded down to 3).
*/
export declare class StepScalingPolicy extends pulumi.ComponentResource {
/**
* Underlying [Policy] created to define the scaling strategy for the upper set of steps.
*/
readonly upperPolicy: aws.autoscaling.Policy | undefined;
/**
* Alarm that invokes [upperPolicy] when the metric goes above the lowest value of the upper
* range of steps.
*/
readonly upperAlarm: aws.cloudwatch.MetricAlarm | undefined;
/**
* Underlying [Policy] created to define the scaling strategy for the lower set of steps.
*/
readonly lowerPolicy: aws.autoscaling.Policy | undefined;
/**
* Alarm that invokes [lowerPolicy] when the metric goes below the highest value of the lower
* range of steps.
*/
readonly lowerAlarm: aws.cloudwatch.MetricAlarm | undefined;
constructor(name: string, group: AutoScalingGroup, args: StepScalingPolicyArgs, opts?: pulumi.ComponentResourceOptions);
}
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