AWS::ElastiCache::ReplicationGroup
The AWS::ElastiCache::ReplicationGroup
resource creates an Amazon ElastiCache (Valkey or Redis OSS) replication
group. A Valkey or Redis OSS (cluster mode disabled) replication group is a collection of cache clusters, where one of the clusters
is a primary read-write cluster and the others are read-only replicas.
A Valkey or Redis OSS (cluster mode enabled) cluster is comprised of from 1 to 90 shards (API/CLI: node groups). Each shard has a primary node and up to 5 read-only replica nodes. The configuration can range from 90 shards and 0 replicas to 15 shards and 5 replicas, which is the maximum number or replicas allowed.
The node or shard limit can be increased to a maximum of 500 per cluster if the engine version is Valkey 7.2 or higher, or Redis OSS 5.0.6 or higher. For example, you can choose to configure a 500 node cluster that ranges between 83 shards (one primary and 5 replicas per shard) and 500 shards (single primary and no replicas). Make sure there are enough available IP addresses to accommodate the increase. Common pitfalls include the subnets in the subnet group have too small a CIDR range or the subnets are shared and heavily used by other clusters. For more information, see Creating a Subnet Group. For versions below 5.0.6, the limit is 250 per cluster.
To request a limit increase, see Amazon Service Limits and choose the limit type Nodes per cluster per instance type.
Syntax
To declare this entity in your Amazon CloudFormation template, use the following syntax:
JSON
{ "Type" : "AWS::ElastiCache::ReplicationGroup", "Properties" : { "AtRestEncryptionEnabled" :
Boolean
, "AuthToken" :String
, "AutomaticFailoverEnabled" :Boolean
, "AutoMinorVersionUpgrade" :Boolean
, "CacheNodeType" :String
, "CacheParameterGroupName" :String
, "CacheSecurityGroupNames" :[ String, ... ]
, "CacheSubnetGroupName" :String
, "ClusterMode" :String
, "DataTieringEnabled" :Boolean
, "Engine" :String
, "EngineVersion" :String
, "GlobalReplicationGroupId" :String
, "IpDiscovery" :String
, "KmsKeyId" :String
, "LogDeliveryConfigurations" :[ LogDeliveryConfigurationRequest, ... ]
, "MultiAZEnabled" :Boolean
, "NetworkType" :String
, "NodeGroupConfiguration" :[ NodeGroupConfiguration, ... ]
, "NotificationTopicArn" :String
, "NumCacheClusters" :Integer
, "NumNodeGroups" :Integer
, "Port" :Integer
, "PreferredCacheClusterAZs" :[ String, ... ]
, "PreferredMaintenanceWindow" :String
, "PrimaryClusterId" :String
, "ReplicasPerNodeGroup" :Integer
, "ReplicationGroupDescription" :String
, "ReplicationGroupId" :String
, "SecurityGroupIds" :[ String, ... ]
, "SnapshotArns" :[ String, ... ]
, "SnapshotName" :String
, "SnapshotRetentionLimit" :Integer
, "SnapshottingClusterId" :String
, "SnapshotWindow" :String
, "Tags" :[ Tag, ... ]
, "TransitEncryptionEnabled" :Boolean
, "TransitEncryptionMode" :String
, "UserGroupIds" :[ String, ... ]
} }
YAML
Type: AWS::ElastiCache::ReplicationGroup Properties: AtRestEncryptionEnabled:
Boolean
AuthToken:String
AutomaticFailoverEnabled:Boolean
AutoMinorVersionUpgrade:Boolean
CacheNodeType:String
CacheParameterGroupName:String
CacheSecurityGroupNames:- String
CacheSubnetGroupName:String
ClusterMode:String
DataTieringEnabled:Boolean
Engine:String
EngineVersion:String
GlobalReplicationGroupId:String
IpDiscovery:String
KmsKeyId:String
LogDeliveryConfigurations:- LogDeliveryConfigurationRequest
MultiAZEnabled:Boolean
NetworkType:String
NodeGroupConfiguration:- NodeGroupConfiguration
NotificationTopicArn:String
NumCacheClusters:Integer
NumNodeGroups:Integer
Port:Integer
PreferredCacheClusterAZs:- String
PreferredMaintenanceWindow:String
PrimaryClusterId:String
ReplicasPerNodeGroup:Integer
ReplicationGroupDescription:String
ReplicationGroupId:String
SecurityGroupIds:- String
SnapshotArns:- String
SnapshotName:String
SnapshotRetentionLimit:Integer
SnapshottingClusterId:String
SnapshotWindow:String
Tags:- Tag
TransitEncryptionEnabled:Boolean
TransitEncryptionMode:String
UserGroupIds:- String
Properties
AtRestEncryptionEnabled
-
A flag that enables encryption at rest when set to
true
.You cannot modify the value of
AtRestEncryptionEnabled
after the replication group is created. To enable encryption at rest on a replication group you must setAtRestEncryptionEnabled
totrue
when you create the replication group.Required: Only available when creating a replication group in an Amazon VPC using Redis OSS version
3.2.6
or4.x
onward.Default:
false
Required: No
Type: Boolean
Update requires: Replacement
AuthToken
-
Reserved parameter. The password used to access a password protected server.
AuthToken
can be specified only on replication groups whereTransitEncryptionEnabled
istrue
. For more information, see Authenticating Valkey or Redis OSS users with the AUTH Command.Important
For HIPAA compliance, you must specify
TransitEncryptionEnabled
astrue
, anAuthToken
, and aCacheSubnetGroup
.Password constraints:
-
Must be only printable ASCII characters.
-
Must be at least 16 characters and no more than 128 characters in length.
-
Nonalphanumeric characters are restricted to (!, &, #, $, ^, <, >, -, ).
For more information, see AUTH password
at http://redis.io/commands/AUTH. Note
If ADDING the AuthToken, update requires Replacement.
Required: No
Type: String
Update requires: No interruption
-
AutomaticFailoverEnabled
-
Specifies whether a read-only replica is automatically promoted to read/write primary if the existing primary fails.
AutomaticFailoverEnabled
must be enabled for Valkey or Redis OSS (cluster mode enabled) replication groups.Default: false
Required: No
Type: Boolean
Update requires: No interruption
AutoMinorVersionUpgrade
-
If you are running Valkey 7.2 or later, or Redis OSS 6.0 or later, set this parameter to yes if you want to opt-in to the next minor version upgrade campaign. This parameter is disabled for previous versions.
Required: No
Type: Boolean
Update requires: No interruption
CacheNodeType
-
The compute and memory capacity of the nodes in the node group (shard).
The following node types are supported by ElastiCache. Generally speaking, the current generation types provide more memory and computational power at lower cost when compared to their equivalent previous generation counterparts.
-
General purpose:
-
Current generation:
M6g node types:
cache.m6g.large
,cache.m6g.xlarge
,cache.m6g.2xlarge
,cache.m6g.4xlarge
,cache.m6g.12xlarge
,cache.m6g.24xlarge
M5 node types:
cache.m5.large
,cache.m5.xlarge
,cache.m5.2xlarge
,cache.m5.4xlarge
,cache.m5.12xlarge
,cache.m5.24xlarge
M4 node types:
cache.m4.large
,cache.m4.xlarge
,cache.m4.2xlarge
,cache.m4.4xlarge
,cache.m4.10xlarge
T4g node types:
cache.t4g.micro
,cache.t4g.small
,cache.t4g.medium
T3 node types:
cache.t3.micro
,cache.t3.small
,cache.t3.medium
T2 node types:
cache.t2.micro
,cache.t2.small
,cache.t2.medium
-
Previous generation: (not recommended)
T1 node types:
cache.t1.micro
M1 node types:
cache.m1.small
,cache.m1.medium
,cache.m1.large
,cache.m1.xlarge
M3 node types:
cache.m3.medium
,cache.m3.large
,cache.m3.xlarge
,cache.m3.2xlarge
-
-
Compute optimized:
-
Previous generation: (not recommended)
C1 node types:
cache.c1.xlarge
-
-
Memory optimized:
-
Current generation:
R6gd node types:
cache.r6gd.xlarge
,cache.r6gd.2xlarge
,cache.r6gd.4xlarge
,cache.r6gd.8xlarge
,cache.r6gd.12xlarge
,cache.r6gd.16xlarge
Note
The
r6gd
family is available in the following regions:us-east-2
,us-east-1
,us-west-2
,us-west-1
,eu-west-1
,eu-central-1
,ap-northeast-1
,ap-southeast-1
,ap-southeast-2
.R6g node types:
cache.r6g.large
,cache.r6g.xlarge
,cache.r6g.2xlarge
,cache.r6g.4xlarge
,cache.r6g.12xlarge
,cache.r6g.24xlarge
R5 node types:
cache.r5.large
,cache.r5.xlarge
,cache.r5.2xlarge
,cache.r5.4xlarge
,cache.r5.12xlarge
,cache.r5.24xlarge
R4 node types:
cache.r4.large
,cache.r4.xlarge
,cache.r4.2xlarge
,cache.r4.4xlarge
,cache.r4.8xlarge
,cache.r4.16xlarge
-
Previous generation: (not recommended)
M2 node types:
cache.m2.xlarge
,cache.m2.2xlarge
,cache.m2.4xlarge
R3 node types:
cache.r3.large
,cache.r3.xlarge
,cache.r3.2xlarge
,cache.r3.4xlarge
,cache.r3.8xlarge
-
For region availability, see Supported Node Types by Amazon Region
Required: No
Type: String
Update requires: No interruption
-
CacheParameterGroupName
-
The name of the parameter group to associate with this replication group. If this argument is omitted, the default cache parameter group for the specified engine is used.
If you are running Valkey or Redis OSS version 3.2.4 or later, only one node group (shard), and want to use a default parameter group, we recommend that you specify the parameter group by name.
-
To create a Valkey or Redis OSS (cluster mode disabled) replication group, use
CacheParameterGroupName=default.redis3.2
. -
To create a Valkey or Redis OSS (cluster mode enabled) replication group, use
CacheParameterGroupName=default.redis3.2.cluster.on
.
Required: No
Type: String
Update requires: No interruption
-
CacheSecurityGroupNames
-
A list of cache security group names to associate with this replication group.
Required: No
Type: Array of String
Update requires: No interruption
CacheSubnetGroupName
-
The name of the cache subnet group to be used for the replication group.
Important
If you're going to launch your cluster in an Amazon VPC, you need to create a subnet group before you start creating a cluster. For more information, see AWS::ElastiCache::SubnetGroup.
Required: No
Type: String
Update requires: Replacement
ClusterMode
-
Enabled or Disabled. To modify cluster mode from Disabled to Enabled, you must first set the cluster mode to Compatible. Compatible mode allows your Valkey or Redis OSS clients to connect using both cluster mode enabled and cluster mode disabled. After you migrate all Valkey or Redis OSS clients to use cluster mode enabled, you can then complete cluster mode configuration and set the cluster mode to Enabled. For more information, see Modify cluster mode.
Required: No
Type: String
Update requires: No interruption
DataTieringEnabled
-
Enables data tiering. Data tiering is only supported for replication groups using the r6gd node type. This parameter must be set to true when using r6gd nodes. For more information, see Data tiering.
Required: No
Type: Boolean
Update requires: Replacement
Engine
-
The name of the cache engine to be used for the clusters in this replication group. The value must be set to
valkey
orredis
.Note
Upgrading an existing engine from redis to valkey is done through in-place migration, and requires a parameter group.
Required: No
Type: String
Update requires: No interruption
EngineVersion
-
The version number of the cache engine to be used for the clusters in this replication group. To view the supported cache engine versions, use the
DescribeCacheEngineVersions
operation.Important: You can upgrade to a newer engine version (see Selecting a Cache Engine and Version) in the ElastiCache User Guide, but you cannot downgrade to an earlier engine version. If you want to use an earlier engine version, you must delete the existing cluster or replication group and create it anew with the earlier engine version.
Required: No
Type: String
Update requires: No interruption
GlobalReplicationGroupId
-
The name of the Global datastore
Required: No
Type: String
Update requires: Replacement
IpDiscovery
-
The network type you choose when creating a replication group, either
ipv4
|ipv6
. IPv6 is supported for workloads using Valkey 7.2 and above, Redis OSS engine version 6.2 to 7.1 or Memcached engine version 1.6.6 and above on all instances built on the Nitro system. Required: No
Type: String
Allowed values:
ipv4 | ipv6
Update requires: No interruption
KmsKeyId
-
The ID of the KMS key used to encrypt the disk on the cluster.
Required: No
Type: String
Update requires: Replacement
LogDeliveryConfigurations
-
Specifies the destination, format and type of the logs.
Required: No
Type: Array of LogDeliveryConfigurationRequest
Update requires: No interruption
MultiAZEnabled
-
A flag indicating if you have Multi-AZ enabled to enhance fault tolerance. For more information, see Minimizing Downtime: Multi-AZ.
Required: No
Type: Boolean
Update requires: No interruption
NetworkType
-
Must be either
ipv4
|ipv6
|dual_stack
. IPv6 is supported for workloads using Valkey 7.2 and above, Redis OSS engine version 6.2 to 7.1 and Memcached engine version 1.6.6 and above on all instances built on the Nitro system. Required: No
Type: String
Allowed values:
ipv4 | ipv6 | dual_stack
Update requires: Replacement
NodeGroupConfiguration
-
NodeGroupConfiguration
is a property of theAWS::ElastiCache::ReplicationGroup
resource that configures an Amazon ElastiCache (ElastiCache) Valkey or Redis OSS cluster node group.If you set UseOnlineResharding to
true
, you can updateNodeGroupConfiguration
without interruption. WhenUseOnlineResharding
is set tofalse
, or is not specified, updatingNodeGroupConfiguration
results in replacement.Required: No
Type: Array of NodeGroupConfiguration
Update requires: No interruption
NotificationTopicArn
-
The Amazon Resource Name (ARN) of the Amazon Simple Notification Service (SNS) topic to which notifications are sent.
Note
The Amazon SNS topic owner must be the same as the cluster owner.
Required: No
Type: String
Update requires: No interruption
NumCacheClusters
-
The number of clusters this replication group initially has.
This parameter is not used if there is more than one node group (shard). You should use
ReplicasPerNodeGroup
instead.If
AutomaticFailoverEnabled
istrue
, the value of this parameter must be at least 2. IfAutomaticFailoverEnabled
isfalse
you can omit this parameter (it will default to 1), or you can explicitly set it to a value between 2 and 6.The maximum permitted value for
NumCacheClusters
is 6 (1 primary plus 5 replicas).Required: No
Type: Integer
Update requires: No interruption
NumNodeGroups
-
An optional parameter that specifies the number of node groups (shards) for this Valkey or Redis OSS (cluster mode enabled) replication group. For Valkey or Redis OSS (cluster mode disabled) either omit this parameter or set it to 1.
If you set UseOnlineResharding to
true
, you can updateNumNodeGroups
without interruption. WhenUseOnlineResharding
is set tofalse
, or is not specified, updatingNumNodeGroups
results in replacement.Default: 1
Required: No
Type: Integer
Update requires: No interruption
Port
-
The port number on which each member of the replication group accepts connections.
Required: No
Type: Integer
Update requires: Replacement
PreferredCacheClusterAZs
-
A list of EC2 Availability Zones in which the replication group's clusters are created. The order of the Availability Zones in the list is the order in which clusters are allocated. The primary cluster is created in the first AZ in the list.
This parameter is not used if there is more than one node group (shard). You should use
NodeGroupConfiguration
instead.Note
If you are creating your replication group in an Amazon VPC (recommended), you can only locate clusters in Availability Zones associated with the subnets in the selected subnet group.
The number of Availability Zones listed must equal the value of
NumCacheClusters
.Default: system chosen Availability Zones.
Required: No
Type: Array of String
Update requires: Replacement
PreferredMaintenanceWindow
-
Specifies the weekly time range during which maintenance on the cluster is performed. It is specified as a range in the format ddd:hh24:mi-ddd:hh24:mi (24H Clock UTC). The minimum maintenance window is a 60 minute period.
Valid values for
ddd
are:-
sun
-
mon
-
tue
-
wed
-
thu
-
fri
-
sat
Example:
sun:23:00-mon:01:30
Required: No
Type: String
Update requires: No interruption
-
PrimaryClusterId
-
The identifier of the cluster that serves as the primary for this replication group. This cluster must already exist and have a status of
available
.This parameter is not required if
NumCacheClusters
,NumNodeGroups
, orReplicasPerNodeGroup
is specified.Required: No
Type: String
Update requires: No interruption
ReplicasPerNodeGroup
-
An optional parameter that specifies the number of replica nodes in each node group (shard). Valid values are 0 to 5.
Required: No
Type: Integer
Update requires: Replacement
ReplicationGroupDescription
-
A user-created description for the replication group.
Required: Yes
Type: String
Update requires: No interruption
ReplicationGroupId
-
The replication group identifier. This parameter is stored as a lowercase string.
Constraints:
-
A name must contain from 1 to 40 alphanumeric characters or hyphens.
-
The first character must be a letter.
-
A name cannot end with a hyphen or contain two consecutive hyphens.
Required: No
Type: String
Update requires: Replacement
-
SecurityGroupIds
-
One or more Amazon VPC security groups associated with this replication group.
Use this parameter only when you are creating a replication group in an Amazon Virtual Private Cloud (Amazon VPC).
Required: No
Type: Array of String
Update requires: No interruption
SnapshotArns
-
A list of Amazon Resource Names (ARN) that uniquely identify the Valkey or Redis OSS RDB snapshot files stored in Amazon S3. The snapshot files are used to populate the new replication group. The Amazon S3 object name in the ARN cannot contain any commas. The new replication group will have the number of node groups (console: shards) specified by the parameter NumNodeGroups or the number of node groups configured by NodeGroupConfiguration regardless of the number of ARNs specified here.
Example of an Amazon S3 ARN:
arn:aws:s3:::my_bucket/snapshot1.rdb
Required: No
Type: Array of String
Update requires: Replacement
SnapshotName
-
The name of a snapshot from which to restore data into the new replication group. The snapshot status changes to
restoring
while the new replication group is being created.Required: No
Type: String
Update requires: Replacement
SnapshotRetentionLimit
-
The number of days for which ElastiCache retains automatic snapshots before deleting them. For example, if you set
SnapshotRetentionLimit
to 5, a snapshot that was taken today is retained for 5 days before being deleted.Default: 0 (i.e., automatic backups are disabled for this cluster).
Required: No
Type: Integer
Update requires: No interruption
SnapshottingClusterId
-
The cluster ID that is used as the daily snapshot source for the replication group. This parameter cannot be set for Valkey or Redis OSS (cluster mode enabled) replication groups.
Required: No
Type: String
Update requires: No interruption
SnapshotWindow
-
The daily time range (in UTC) during which ElastiCache begins taking a daily snapshot of your node group (shard).
Example:
05:00-09:00
If you do not specify this parameter, ElastiCache automatically chooses an appropriate time range.
Required: No
Type: String
Update requires: No interruption
-
A list of tags to be added to this resource. Tags are comma-separated key,value pairs (e.g. Key=
myKey
, Value=myKeyValue
. You can include multiple tags as shown following: Key=myKey
, Value=myKeyValue
Key=mySecondKey
, Value=mySecondKeyValue
. Tags on replication groups will be replicated to all nodes.Required: No
Type: Array of Tag
Update requires: No interruption
TransitEncryptionEnabled
-
A flag that enables in-transit encryption when set to
true
.You cannot modify the value of
TransitEncryptionEnabled
after the cluster is created. To enable in-transit encryption on a cluster you must setTransitEncryptionEnabled
totrue
when you create a cluster.This parameter is valid only if the
Engine
parameter isredis
, theEngineVersion
parameter is3.2.6
or4.x
onward, and the cluster is being created in an Amazon VPC.If you enable in-transit encryption, you must also specify a value for
CacheSubnetGroup
.Note
-
TransitEncryptionEnabled is only available when creating a replication group in an Amazon VPC using Valkey version
7.2
and above, Redis OSS version3.2.6
, or Redis OSS version4.x
and above. -
TransitEncryptionEnabled is required when creating a new valkey replication group.
Default:
false
Important
For HIPAA compliance, you must specify
TransitEncryptionEnabled
astrue
, anAuthToken
, and aCacheSubnetGroup
.Required: No
Type: Boolean
Update requires: No interruption
-
TransitEncryptionMode
-
A setting that allows you to migrate your clients to use in-transit encryption, with no downtime.
When setting
TransitEncryptionEnabled
totrue
, you can set yourTransitEncryptionMode
topreferred
in the same request, to allow both encrypted and unencrypted connections at the same time. Once you migrate all your Valkey or Redis OSS clients to use encrypted connections you can modify the value torequired
to allow encrypted connections only.Setting
TransitEncryptionMode
torequired
is a two-step process that requires you to first set theTransitEncryptionMode
topreferred
, after that you can setTransitEncryptionMode
torequired
.This process will not trigger the replacement of the replication group.
Required: No
Type: String
Allowed values:
preferred | required
Update requires: No interruption
UserGroupIds
-
The ID of user group to associate with the replication group.
Required: No
Type: Array of String
Minimum:
1
Update requires: No interruption
Return values
Ref
When the logical ID of this resource is provided to the Ref intrinsic function, Ref returns the resource name.
For more information about using the Ref function, see Ref.
Fn::GetAtt
The Fn::GetAtt
intrinsic function returns a value for a specified attribute of this type. The following are the available attributes and sample return values.
For more information about using the Fn::GetAtt
intrinsic function, see Fn::GetAtt
.
ConfigurationEndPoint.Address
-
The DNS hostname of the cache node.
Note
Valkey or Redis OSS (cluster mode disabled) replication groups don't have this attribute. Therefore,
Fn::GetAtt
returns a value for this attribute only if the replication group is clustered. Otherwise,Fn::GetAtt
fails. For Valkey or Redis OSS (cluster mode disabled) replication groups, use thePrimaryEndpoint
orReadEndpoint
attributes. ConfigurationEndPoint.Port
-
The port number that the cache engine is listening on.
PrimaryEndPoint.Address
-
The DNS address of the primary read-write cache node.
PrimaryEndPoint.Port
-
The number of the port that the primary read-write cache engine is listening on.
ReadEndPoint.Addresses
-
A string with a list of endpoints for the primary and read-only replicas. The order of the addresses maps to the order of the ports from the
ReadEndPoint.Ports
attribute. ReadEndPoint.Addresses.List
-
A string with a list of endpoints for the read-only replicas. The order of the addresses maps to the order of the ports from the
ReadEndPoint.Ports
attribute. ReadEndPoint.Ports
-
A string with a list of ports for the read-only replicas. The order of the ports maps to the order of the addresses from the
ReadEndPoint.Addresses
attribute. ReadEndPoint.Ports.List
-
A string with a list of ports for the read-only replicas. The order of the ports maps to the order of the addresses from the ReadEndPoint.Addresses attribute.
ReaderEndPoint.Address
-
The address of the reader endpoint.
ReaderEndPoint.Port
-
The port used by the reader endpoint.
ReplicationGroupId
Property description not available.
Examples
Declare a Replication Group with Two Nodes
The following example declares a replication group with two nodes and automatic failover enabled.
JSON
{ "myReplicationGroup": { "Type": "AWS::ElastiCache::ReplicationGroup", "Properties": { "ReplicationGroupDescription": "my description", "NumCacheClusters": "2", "Engine": "redis", "CacheNodeType": "cache.m3.medium", "AutomaticFailoverEnabled": "true", "CacheSubnetGroupName": "subnetgroup", "EngineVersion": "2.8.6", "PreferredMaintenanceWindow": "wed:09:25-wed:22:30", "SnapshotRetentionLimit": "4", "SnapshotWindow": "03:30-05:30" } } }
YAML
myReplicationGroup: Type: 'AWS::ElastiCache::ReplicationGroup' Properties: ReplicationGroupDescription: my description NumCacheClusters: '2' Engine: redis CacheNodeType: cache.m3.medium AutomaticFailoverEnabled: 'true' CacheSubnetGroupName: subnetgroup EngineVersion: 2.8.6 PreferredMaintenanceWindow: 'wed:09:25-wed:22:30' SnapshotRetentionLimit: '4' SnapshotWindow: '03:30-05:30'
Declare a Replication Group with Two Node Groups
The following example declares a replication group with two nodes groups (shards) with three replicas in each group.
JSON
{ "BasicReplicationGroup": { "Type": "AWS::ElastiCache::ReplicationGroup", "Properties": { "AutomaticFailoverEnabled": true, "CacheNodeType": "cache.r3.large", "CacheSubnetGroupName": { "Ref": "CacheSubnetGroup" }, "Engine": "redis", "EngineVersion": "3.2", "NumNodeGroups": "2", "ReplicasPerNodeGroup": "3", "Port": 6379, "PreferredMaintenanceWindow": "sun:05:00-sun:09:00", "ReplicationGroupDescription": "A sample replication group", "SecurityGroupIds": [ { "Ref": "ReplicationGroupSG" } ], "SnapshotRetentionLimit": 5, "SnapshotWindow": "10:00-12:00" } } }
YAML
BasicReplicationGroup: Type: 'AWS::ElastiCache::ReplicationGroup' Properties: AutomaticFailoverEnabled: true CacheNodeType: cache.r3.large CacheSubnetGroupName: !Ref CacheSubnetGroup Engine: redis EngineVersion: '3.2' NumNodeGroups: '2' ReplicasPerNodeGroup: '3' Port: 6379 PreferredMaintenanceWindow: 'sun:05:00-sun:09:00' ReplicationGroupDescription: A sample replication group SecurityGroupIds: - !Ref ReplicationGroupSG SnapshotRetentionLimit: 5 SnapshotWindow: '10:00-12:00'
See also
CreateReplicationGroup in the Amazon ElastiCache API Reference Guide