Package software.amazon.awscdk.services.autoscaling

Enum InstanceRefreshStrategy

java.lang.Object

java.lang.Enum<InstanceRefreshStrategy>

software.amazon.awscdk.services.autoscaling.InstanceRefreshStrategy

All Implemented Interfaces:

Serializable, Comparable<InstanceRefreshStrategy>, java.lang.constant.Constable

@Generated(value="jsii-pacmak/1.138.0 (build 0ca7ee8)",
           date="2026-07-31T10:49:23.690Z")
@Stability(Stable)
public enum InstanceRefreshStrategy
extends Enum<InstanceRefreshStrategy>

The strategy to use for the instance refresh.

Example:

 Vpc vpc;
 InstanceType instanceType;
 IMachineImage machineImage;
 Alarm alarm;
 AutoScalingGroup.Builder.create(this, "ASG")
         .vpc(vpc)
         .instanceType(instanceType)
         .machineImage(machineImage)
         .updatePolicy(UpdatePolicy.instanceRefresh(InstanceRefreshOptions.builder()
                 .strategy(InstanceRefreshStrategy.ROLLING)
                 .minHealthyPercentage(90)
                 .maxHealthyPercentage(100)
                 .instanceWarmup(Duration.seconds(300))
                 .checkpointPercentages(List.of(50, 100))
                 .checkpointDelay(Duration.minutes(10))
                 .alarms(List.of(alarm))
                 .build()))
         .build();
 

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
REPLACE_ROOT_VOLUME	Replace the root volume of instances in place.
ROLLING	Terminate instances and launch new ones to replace them.

Method Summary

Modifier and Type	Method	Description
static InstanceRefreshStrategy	valueOf(String name)	Returns the enum constant of this type with the specified name.
static InstanceRefreshStrategy[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

ROLLING

@Stability(Stable)
public static final InstanceRefreshStrategy ROLLING

Terminate instances and launch new ones to replace them.

REPLACE_ROOT_VOLUME

@Stability(Stable)
public static final InstanceRefreshStrategy REPLACE_ROOT_VOLUME

Replace the root volume of instances in place.

When this strategy is used, only ImageId changes within the launch template or mixed instances policy are allowed. Other property changes may cause the stack update to fail.

Method Details

values

public static InstanceRefreshStrategy[] values()

Returns an array containing the constants of this enum type, in the order they are declared.

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static InstanceRefreshStrategy valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null