software.amazon.awscdk.services.elasticloadbalancing

Class CfnLoadBalancer

java.lang.Object

software.amazon.jsii.JsiiObject

software.constructs.Construct

software.amazon.awscdk.CfnElement

software.amazon.awscdk.CfnRefElement

software.amazon.awscdk.CfnResource

software.amazon.awscdk.services.elasticloadbalancing.CfnLoadBalancer

All Implemented Interfaces:

IInspectable, software.amazon.jsii.JsiiSerializable, software.constructs.IConstruct, software.constructs.IDependable

@Generated(value="jsii-pacmak/1.67.0 (build 2c027f5)",
           date="2022-09-19T20:26:39.026Z")
 @Stability(value=Stable)
public class CfnLoadBalancer
extends CfnResource
implements IInspectable

A CloudFormation `AWS::ElasticLoadBalancing::LoadBalancer`.

Specifies a Classic Load Balancer.

You can specify the AvailabilityZones or Subnets property, but not both.

If this resource has a public IP address and is also in a VPC that is defined in the same template, you must use the DependsOn attribute to declare a dependency on the VPC-gateway attachment.

Example:

 // The code below shows an example of how to instantiate this type.
 // The values are placeholders you should change.
 import software.amazon.awscdk.services.elasticloadbalancing.*;
 Object attributes;
 CfnLoadBalancer cfnLoadBalancer = CfnLoadBalancer.Builder.create(this, "MyCfnLoadBalancer")
         .listeners(List.of(ListenersProperty.builder()
                 .instancePort("instancePort")
                 .loadBalancerPort("loadBalancerPort")
                 .protocol("protocol")
                 // the properties below are optional
                 .instanceProtocol("instanceProtocol")
                 .policyNames(List.of("policyNames"))
                 .sslCertificateId("sslCertificateId")
                 .build()))
         // the properties below are optional
         .accessLoggingPolicy(AccessLoggingPolicyProperty.builder()
                 .enabled(false)
                 .s3BucketName("s3BucketName")
                 // the properties below are optional
                 .emitInterval(123)
                 .s3BucketPrefix("s3BucketPrefix")
                 .build())
         .appCookieStickinessPolicy(List.of(AppCookieStickinessPolicyProperty.builder()
                 .cookieName("cookieName")
                 .policyName("policyName")
                 .build()))
         .availabilityZones(List.of("availabilityZones"))
         .connectionDrainingPolicy(ConnectionDrainingPolicyProperty.builder()
                 .enabled(false)
                 // the properties below are optional
                 .timeout(123)
                 .build())
         .connectionSettings(ConnectionSettingsProperty.builder()
                 .idleTimeout(123)
                 .build())
         .crossZone(false)
         .healthCheck(HealthCheckProperty.builder()
                 .healthyThreshold("healthyThreshold")
                 .interval("interval")
                 .target("target")
                 .timeout("timeout")
                 .unhealthyThreshold("unhealthyThreshold")
                 .build())
         .instances(List.of("instances"))
         .lbCookieStickinessPolicy(List.of(LBCookieStickinessPolicyProperty.builder()
                 .cookieExpirationPeriod("cookieExpirationPeriod")
                 .policyName("policyName")
                 .build()))
         .loadBalancerName("loadBalancerName")
         .policies(List.of(PoliciesProperty.builder()
                 .attributes(List.of(attributes))
                 .policyName("policyName")
                 .policyType("policyType")
                 // the properties below are optional
                 .instancePorts(List.of("instancePorts"))
                 .loadBalancerPorts(List.of("loadBalancerPorts"))
                 .build()))
         .scheme("scheme")
         .securityGroups(List.of("securityGroups"))
         .subnets(List.of("subnets"))
         .tags(List.of(CfnTag.builder()
                 .key("key")
                 .value("value")
                 .build()))
         .build();
 

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	CfnLoadBalancer.AccessLoggingPolicyProperty Specifies where and how access logs are stored for your Classic Load Balancer.
static interface	CfnLoadBalancer.AppCookieStickinessPolicyProperty Specifies a policy for application-controlled session stickiness for your Classic Load Balancer.
static class	CfnLoadBalancer.Builder A fluent builder for CfnLoadBalancer.
static interface	CfnLoadBalancer.ConnectionDrainingPolicyProperty Specifies the connection draining settings for your Classic Load Balancer.
static interface	CfnLoadBalancer.ConnectionSettingsProperty Specifies the idle timeout value for your Classic Load Balancer.
static interface	CfnLoadBalancer.HealthCheckProperty Specifies health check settings for your Classic Load Balancer.
static interface	CfnLoadBalancer.LBCookieStickinessPolicyProperty Specifies a policy for duration-based session stickiness for your Classic Load Balancer.
static interface	CfnLoadBalancer.ListenersProperty Specifies a listener for your Classic Load Balancer.
static interface	CfnLoadBalancer.PoliciesProperty Specifies policies for your Classic Load Balancer.

Nested classes/interfaces inherited from class software.amazon.jsii.JsiiObject

software.amazon.jsii.JsiiObject.InitializationMode

Nested classes/interfaces inherited from interface software.amazon.awscdk.IInspectable

IInspectable.Jsii$Default, IInspectable.Jsii$Proxy

Nested classes/interfaces inherited from interface software.constructs.IConstruct

software.constructs.IConstruct.Jsii$Default

Field Summary

Fields

Modifier and Type	Field and Description
static String	CFN_RESOURCE_TYPE_NAME The CloudFormation resource type name for this resource class.

Constructor Summary

Constructors

Modifier	Constructor and Description
	CfnLoadBalancer(software.constructs.Construct scope, String id, CfnLoadBalancerProps props) Create a new `AWS::ElasticLoadBalancing::LoadBalancer`.
protected	CfnLoadBalancer(software.amazon.jsii.JsiiObject.InitializationMode initializationMode)
protected	CfnLoadBalancer(software.amazon.jsii.JsiiObjectRef objRef)

Method Summary

Modifier and Type	Method and Description
Object	getAccessLoggingPolicy() Information about where and how access logs are stored for the load balancer.
Object	getAppCookieStickinessPolicy() Information about a policy for application-controlled session stickiness.
String	getAttrCanonicalHostedZoneName() The name of the Route 53 hosted zone that is associated with the load balancer.
String	getAttrCanonicalHostedZoneNameId() The ID of the Route 53 hosted zone name that is associated with the load balancer.
String	getAttrDnsName() The DNS name for the load balancer.
String	getAttrSourceSecurityGroupGroupName() The name of the security group that you can use as part of your inbound rules for your load balancer's back-end instances.
String	getAttrSourceSecurityGroupOwnerAlias() The owner of the source security group.
List<String>	getAvailabilityZones() The Availability Zones for the load balancer.
protected Map<String,Object>	getCfnProperties()
Object	getConnectionDrainingPolicy() If enabled, the load balancer allows existing requests to complete before the load balancer shifts traffic away from a deregistered or unhealthy instance.
Object	getConnectionSettings() If enabled, the load balancer allows the connections to remain idle (no data is sent over the connection) for the specified duration.
Object	getCrossZone() If enabled, the load balancer routes the request traffic evenly across all instances regardless of the Availability Zones.
Object	getHealthCheck() The health check settings to use when evaluating the health of your EC2 instances.
List<String>	getInstances() The IDs of the instances for the load balancer.
Object	getLbCookieStickinessPolicy() Information about a policy for duration-based session stickiness.
Object	getListeners() The listeners for the load balancer.
String	getLoadBalancerName() The name of the load balancer.
Object	getPolicies() The policies defined for your Classic Load Balancer.
String	getScheme() The type of load balancer.
List<String>	getSecurityGroups() The security groups for the load balancer.
List<String>	getSubnets() The IDs of the subnets for the load balancer.
TagManager	getTags() The tags associated with a load balancer.
void	inspect(TreeInspector inspector) Examines the CloudFormation resource and discloses attributes.
protected Map<String,Object>	renderProperties(Map<String,Object> props)
void	setAccessLoggingPolicy(CfnLoadBalancer.AccessLoggingPolicyProperty value) Information about where and how access logs are stored for the load balancer.
void	setAccessLoggingPolicy(IResolvable value) Information about where and how access logs are stored for the load balancer.
void	setAppCookieStickinessPolicy(IResolvable value) Information about a policy for application-controlled session stickiness.
void	setAppCookieStickinessPolicy(List<Object> value) Information about a policy for application-controlled session stickiness.
void	setAvailabilityZones(List<String> value) The Availability Zones for the load balancer.
void	setConnectionDrainingPolicy(CfnLoadBalancer.ConnectionDrainingPolicyProperty value) If enabled, the load balancer allows existing requests to complete before the load balancer shifts traffic away from a deregistered or unhealthy instance.
void	setConnectionDrainingPolicy(IResolvable value) If enabled, the load balancer allows existing requests to complete before the load balancer shifts traffic away from a deregistered or unhealthy instance.
void	setConnectionSettings(CfnLoadBalancer.ConnectionSettingsProperty value) If enabled, the load balancer allows the connections to remain idle (no data is sent over the connection) for the specified duration.
void	setConnectionSettings(IResolvable value) If enabled, the load balancer allows the connections to remain idle (no data is sent over the connection) for the specified duration.
void	setCrossZone(Boolean value) If enabled, the load balancer routes the request traffic evenly across all instances regardless of the Availability Zones.
void	setCrossZone(IResolvable value) If enabled, the load balancer routes the request traffic evenly across all instances regardless of the Availability Zones.
void	setHealthCheck(CfnLoadBalancer.HealthCheckProperty value) The health check settings to use when evaluating the health of your EC2 instances.
void	setHealthCheck(IResolvable value) The health check settings to use when evaluating the health of your EC2 instances.
void	setInstances(List<String> value) The IDs of the instances for the load balancer.
void	setLbCookieStickinessPolicy(IResolvable value) Information about a policy for duration-based session stickiness.
void	setLbCookieStickinessPolicy(List<Object> value) Information about a policy for duration-based session stickiness.
void	setListeners(IResolvable value) The listeners for the load balancer.
void	setListeners(List<Object> value) The listeners for the load balancer.
void	setLoadBalancerName(String value) The name of the load balancer.
void	setPolicies(IResolvable value) The policies defined for your Classic Load Balancer.
void	setPolicies(List<Object> value) The policies defined for your Classic Load Balancer.
void	setScheme(String value) The type of load balancer.
void	setSecurityGroups(List<String> value) The security groups for the load balancer.
void	setSubnets(List<String> value) The IDs of the subnets for the load balancer.

Methods inherited from class software.amazon.awscdk.CfnResource

addDeletionOverride, addDependsOn, addMetadata, addOverride, addPropertyDeletionOverride, addPropertyOverride, applyRemovalPolicy, applyRemovalPolicy, applyRemovalPolicy, getAtt, getCfnOptions, getCfnResourceType, getMetadata, getUpdatedProperites, getUpdatedProperties, isCfnResource, shouldSynthesize, toString, validateProperties

Methods inherited from class software.amazon.awscdk.CfnRefElement

getRef

Methods inherited from class software.amazon.awscdk.CfnElement

getCreationStack, getLogicalId, getStack, isCfnElement, overrideLogicalId

Methods inherited from class software.constructs.Construct

getNode, isConstruct

Methods inherited from class software.amazon.jsii.JsiiObject

jsiiAsyncCall, jsiiAsyncCall, jsiiCall, jsiiCall, jsiiGet, jsiiGet, jsiiSet, jsiiStaticCall, jsiiStaticCall, jsiiStaticGet, jsiiStaticGet, jsiiStaticSet, jsiiStaticSet

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface software.amazon.jsii.JsiiSerializable

$jsii$toJson

Field Detail

CFN_RESOURCE_TYPE_NAME

@Stability(value=Stable)
public static final String CFN_RESOURCE_TYPE_NAME

The CloudFormation resource type name for this resource class.

Constructor Detail

CfnLoadBalancer

protected CfnLoadBalancer(software.amazon.jsii.JsiiObjectRef objRef)

CfnLoadBalancer

protected CfnLoadBalancer(software.amazon.jsii.JsiiObject.InitializationMode initializationMode)

CfnLoadBalancer

@Stability(value=Stable)
public CfnLoadBalancer(@NotNull
                                                software.constructs.Construct scope,
                                                @NotNull
                                                String id,
                                                @NotNull
                                                CfnLoadBalancerProps props)

Create a new `AWS::ElasticLoadBalancing::LoadBalancer`.

Parameters:

scope - - scope in which this resource is defined. This parameter is required.

id - - scoped id of the resource. This parameter is required.

props - - resource properties. This parameter is required.

Method Detail

inspect

@Stability(value=Stable)
public void inspect(@NotNull
                                             TreeInspector inspector)

Examines the CloudFormation resource and discloses attributes.

Specified by:

inspect in interface IInspectable

Parameters:

inspector - - tree inspector to collect and process attributes. This parameter is required.

renderProperties

@Stability(value=Stable)
 @NotNull
protected Map<String,Object> renderProperties(@NotNull
                                                                                 Map<String,Object> props)

Overrides:

renderProperties in class CfnResource

Parameters:

props - This parameter is required.

getAttrCanonicalHostedZoneName

@Stability(value=Stable)
 @NotNull
public String getAttrCanonicalHostedZoneName()

The name of the Route 53 hosted zone that is associated with the load balancer.

Internal-facing load balancers don't use this value, use DNSName instead.

getAttrCanonicalHostedZoneNameId

@Stability(value=Stable)
 @NotNull
public String getAttrCanonicalHostedZoneNameId()

The ID of the Route 53 hosted zone name that is associated with the load balancer.

getAttrDnsName

@Stability(value=Stable)
 @NotNull
public String getAttrDnsName()

The DNS name for the load balancer.

getAttrSourceSecurityGroupGroupName

@Stability(value=Stable)
 @NotNull
public String getAttrSourceSecurityGroupGroupName()

The name of the security group that you can use as part of your inbound rules for your load balancer's back-end instances.

getAttrSourceSecurityGroupOwnerAlias

@Stability(value=Stable)
 @NotNull
public String getAttrSourceSecurityGroupOwnerAlias()

The owner of the source security group.

getCfnProperties

@Stability(value=Stable)
 @NotNull
protected Map<String,Object> getCfnProperties()

Overrides:

getCfnProperties in class CfnResource

getTags

@Stability(value=Stable)
 @NotNull
public TagManager getTags()

The tags associated with a load balancer.

getListeners

@Stability(value=Stable)
 @NotNull
public Object getListeners()

The listeners for the load balancer. You can specify at most one listener per port.

If you update the properties for a listener, AWS CloudFormation deletes the existing listener and creates a new one with the specified properties. While the new listener is being created, clients cannot connect to the load balancer.

setListeners

@Stability(value=Stable)
public void setListeners(@NotNull
                                                  IResolvable value)

The listeners for the load balancer. You can specify at most one listener per port.

If you update the properties for a listener, AWS CloudFormation deletes the existing listener and creates a new one with the specified properties. While the new listener is being created, clients cannot connect to the load balancer.

setListeners

@Stability(value=Stable)
public void setListeners(@NotNull
                                                  List<Object> value)

The listeners for the load balancer. You can specify at most one listener per port.

If you update the properties for a listener, AWS CloudFormation deletes the existing listener and creates a new one with the specified properties. While the new listener is being created, clients cannot connect to the load balancer.

getAccessLoggingPolicy

@Stability(value=Stable)
 @Nullable
public Object getAccessLoggingPolicy()

Information about where and how access logs are stored for the load balancer.

setAccessLoggingPolicy

@Stability(value=Stable)
public void setAccessLoggingPolicy(@Nullable
                                                            CfnLoadBalancer.AccessLoggingPolicyProperty value)

Information about where and how access logs are stored for the load balancer.

setAccessLoggingPolicy

@Stability(value=Stable)
public void setAccessLoggingPolicy(@Nullable
                                                            IResolvable value)

Information about where and how access logs are stored for the load balancer.

getAppCookieStickinessPolicy

@Stability(value=Stable)
 @Nullable
public Object getAppCookieStickinessPolicy()

Information about a policy for application-controlled session stickiness.

setAppCookieStickinessPolicy

@Stability(value=Stable)
public void setAppCookieStickinessPolicy(@Nullable
                                                                  IResolvable value)

Information about a policy for application-controlled session stickiness.

setAppCookieStickinessPolicy

@Stability(value=Stable)
public void setAppCookieStickinessPolicy(@Nullable
                                                                  List<Object> value)

Information about a policy for application-controlled session stickiness.

getAvailabilityZones

@Stability(value=Stable)
 @Nullable
public List<String> getAvailabilityZones()

The Availability Zones for the load balancer. For load balancers in a VPC, specify `Subnets` instead.

Update requires replacement if you did not previously specify an Availability Zone or if you are removing all Availability Zones. Otherwise, update requires no interruption.

setAvailabilityZones

@Stability(value=Stable)
public void setAvailabilityZones(@Nullable
                                                          List<String> value)

The Availability Zones for the load balancer. For load balancers in a VPC, specify `Subnets` instead.

Update requires replacement if you did not previously specify an Availability Zone or if you are removing all Availability Zones. Otherwise, update requires no interruption.

getConnectionDrainingPolicy

@Stability(value=Stable)
 @Nullable
public Object getConnectionDrainingPolicy()

If enabled, the load balancer allows existing requests to complete before the load balancer shifts traffic away from a deregistered or unhealthy instance.

For more information, see Configure Connection Draining in the Classic Load Balancers Guide .

setConnectionDrainingPolicy

@Stability(value=Stable)
public void setConnectionDrainingPolicy(@Nullable
                                                                 CfnLoadBalancer.ConnectionDrainingPolicyProperty value)

If enabled, the load balancer allows existing requests to complete before the load balancer shifts traffic away from a deregistered or unhealthy instance.

For more information, see Configure Connection Draining in the Classic Load Balancers Guide .

setConnectionDrainingPolicy

@Stability(value=Stable)
public void setConnectionDrainingPolicy(@Nullable
                                                                 IResolvable value)

If enabled, the load balancer allows existing requests to complete before the load balancer shifts traffic away from a deregistered or unhealthy instance.

For more information, see Configure Connection Draining in the Classic Load Balancers Guide .

getConnectionSettings

@Stability(value=Stable)
 @Nullable
public Object getConnectionSettings()

If enabled, the load balancer allows the connections to remain idle (no data is sent over the connection) for the specified duration.

By default, Elastic Load Balancing maintains a 60-second idle connection timeout for both front-end and back-end connections of your load balancer. For more information, see Configure Idle Connection Timeout in the Classic Load Balancers Guide .

setConnectionSettings

@Stability(value=Stable)
public void setConnectionSettings(@Nullable
                                                           CfnLoadBalancer.ConnectionSettingsProperty value)

If enabled, the load balancer allows the connections to remain idle (no data is sent over the connection) for the specified duration.

By default, Elastic Load Balancing maintains a 60-second idle connection timeout for both front-end and back-end connections of your load balancer. For more information, see Configure Idle Connection Timeout in the Classic Load Balancers Guide .

setConnectionSettings

@Stability(value=Stable)
public void setConnectionSettings(@Nullable
                                                           IResolvable value)

If enabled, the load balancer allows the connections to remain idle (no data is sent over the connection) for the specified duration.

By default, Elastic Load Balancing maintains a 60-second idle connection timeout for both front-end and back-end connections of your load balancer. For more information, see Configure Idle Connection Timeout in the Classic Load Balancers Guide .

getCrossZone

@Stability(value=Stable)
 @Nullable
public Object getCrossZone()

If enabled, the load balancer routes the request traffic evenly across all instances regardless of the Availability Zones.

For more information, see Configure Cross-Zone Load Balancing in the Classic Load Balancers Guide .

setCrossZone

@Stability(value=Stable)
public void setCrossZone(@Nullable
                                                  Boolean value)

If enabled, the load balancer routes the request traffic evenly across all instances regardless of the Availability Zones.

For more information, see Configure Cross-Zone Load Balancing in the Classic Load Balancers Guide .

setCrossZone

@Stability(value=Stable)
public void setCrossZone(@Nullable
                                                  IResolvable value)

If enabled, the load balancer routes the request traffic evenly across all instances regardless of the Availability Zones.

For more information, see Configure Cross-Zone Load Balancing in the Classic Load Balancers Guide .

getHealthCheck

@Stability(value=Stable)
 @Nullable
public Object getHealthCheck()

The health check settings to use when evaluating the health of your EC2 instances.

Update requires replacement if you did not previously specify health check settings or if you are removing the health check settings. Otherwise, update requires no interruption.

setHealthCheck

@Stability(value=Stable)
public void setHealthCheck(@Nullable
                                                    CfnLoadBalancer.HealthCheckProperty value)

The health check settings to use when evaluating the health of your EC2 instances.

Update requires replacement if you did not previously specify health check settings or if you are removing the health check settings. Otherwise, update requires no interruption.

setHealthCheck

@Stability(value=Stable)
public void setHealthCheck(@Nullable
                                                    IResolvable value)

The health check settings to use when evaluating the health of your EC2 instances.

Update requires replacement if you did not previously specify health check settings or if you are removing the health check settings. Otherwise, update requires no interruption.

getInstances

@Stability(value=Stable)
 @Nullable
public List<String> getInstances()

The IDs of the instances for the load balancer.

setInstances

@Stability(value=Stable)
public void setInstances(@Nullable
                                                  List<String> value)

The IDs of the instances for the load balancer.

getLbCookieStickinessPolicy

@Stability(value=Stable)
 @Nullable
public Object getLbCookieStickinessPolicy()

Information about a policy for duration-based session stickiness.

setLbCookieStickinessPolicy

@Stability(value=Stable)
public void setLbCookieStickinessPolicy(@Nullable
                                                                 IResolvable value)

Information about a policy for duration-based session stickiness.

setLbCookieStickinessPolicy

@Stability(value=Stable)
public void setLbCookieStickinessPolicy(@Nullable
                                                                 List<Object> value)

Information about a policy for duration-based session stickiness.

getLoadBalancerName

@Stability(value=Stable)
 @Nullable
public String getLoadBalancerName()

The name of the load balancer.

This name must be unique within your set of load balancers for the region.

If you don't specify a name, AWS CloudFormation generates a unique physical ID for the load balancer. For more information, see Name Type . If you specify a name, you cannot perform updates that require replacement of this resource, but you can perform other updates. To replace the resource, specify a new name.

setLoadBalancerName

@Stability(value=Stable)
public void setLoadBalancerName(@Nullable
                                                         String value)

The name of the load balancer.

This name must be unique within your set of load balancers for the region.

If you don't specify a name, AWS CloudFormation generates a unique physical ID for the load balancer. For more information, see Name Type . If you specify a name, you cannot perform updates that require replacement of this resource, but you can perform other updates. To replace the resource, specify a new name.

getPolicies

@Stability(value=Stable)
 @Nullable
public Object getPolicies()

The policies defined for your Classic Load Balancer.

Specify only back-end server policies.

setPolicies

@Stability(value=Stable)
public void setPolicies(@Nullable
                                                 IResolvable value)

The policies defined for your Classic Load Balancer.

Specify only back-end server policies.

setPolicies

@Stability(value=Stable)
public void setPolicies(@Nullable
                                                 List<Object> value)

The policies defined for your Classic Load Balancer.

Specify only back-end server policies.

getScheme

@Stability(value=Stable)
 @Nullable
public String getScheme()

The type of load balancer. Valid only for load balancers in a VPC.

If Scheme is internet-facing , the load balancer has a public DNS name that resolves to a public IP address.

If Scheme is internal , the load balancer has a public DNS name that resolves to a private IP address.

setScheme

@Stability(value=Stable)
public void setScheme(@Nullable
                                               String value)

The type of load balancer. Valid only for load balancers in a VPC.

If Scheme is internet-facing , the load balancer has a public DNS name that resolves to a public IP address.

If Scheme is internal , the load balancer has a public DNS name that resolves to a private IP address.

getSecurityGroups

@Stability(value=Stable)
 @Nullable
public List<String> getSecurityGroups()

The security groups for the load balancer.

Valid only for load balancers in a VPC.

setSecurityGroups

@Stability(value=Stable)
public void setSecurityGroups(@Nullable
                                                       List<String> value)

The security groups for the load balancer.

Valid only for load balancers in a VPC.

getSubnets

@Stability(value=Stable)
 @Nullable
public List<String> getSubnets()

The IDs of the subnets for the load balancer. You can specify at most one subnet per Availability Zone.

Update requires replacement if you did not previously specify a subnet or if you are removing all subnets. Otherwise, update requires no interruption. To update to a different subnet in the current Availability Zone, you must first update to a subnet in a different Availability Zone, then update to the new subnet in the original Availability Zone.

setSubnets

@Stability(value=Stable)
public void setSubnets(@Nullable
                                                List<String> value)

The IDs of the subnets for the load balancer. You can specify at most one subnet per Availability Zone.

Update requires replacement if you did not previously specify a subnet or if you are removing all subnets. Otherwise, update requires no interruption. To update to a different subnet in the current Availability Zone, you must first update to a subnet in a different Availability Zone, then update to the new subnet in the original Availability Zone.