Synopsis
Calls the Amazon ElastiCache CreateReplicationGroup API operation.
Syntax
New-ECReplicationGroup-PrimaryClusterId <String>-AtRestEncryptionEnabled <Boolean>-AuthToken <String>-AutomaticFailoverEnabled <Boolean>-AutoMinorVersionUpgrade <Boolean>-CacheNodeType <String>-CacheParameterGroupName <String>-CacheSecurityGroupName <String[]>-CacheSubnetGroupName <String>-Engine <String>-EngineVersion <String>-NodeGroupConfiguration <NodeGroupConfiguration[]>-NotificationTopicArn <String>-NumCacheCluster <Int32>-NumNodeGroup <Int32>-Port <Int32>-PreferredCacheClusterAZs <String[]>-PreferredMaintenanceWindow <String>-ReplicasPerNodeGroup <Int32>-ReplicationGroupDescription <String>-ReplicationGroupId <String>-SecurityGroupId <String[]>-SnapshotArn <String[]>-SnapshotName <String>-SnapshotRetentionLimit <Int32>-SnapshotWindow <String>-Tag <Tag[]>-TransitEncryptionEnabled <Boolean>-Force <SwitchParameter>
Description
Creates a Redis (cluster mode disabled) or a Redis (cluster mode enabled) replication group.
A Redis (cluster mode disabled) replication group is a collection of clusters, where one of the clusters is a read/write primary and the others are read-only replicas. Writes to the primary are asynchronously propagated to the replicas.
A Redis (cluster mode enabled) replication group is a collection of 1 to 15 node groups (shards). Each node group (shard) has one read/write primary node and up to 5 read-only replica nodes. Writes to the primary are asynchronously propagated to the replicas. Redis (cluster mode enabled) replication groups partition the data across node groups (shards).
When a Redis (cluster mode disabled) replication group has been successfully created, you can add one or more read replicas to it, up to a total of 5 read replicas. You cannot alter a Redis (cluster mode enabled) replication group after it has been created. However, if you need to increase or decrease the number of node groups (console: shards), you can avail yourself of ElastiCache for Redis' enhanced backup and restore. For more information, see Restoring From a Backup with Cluster Resizing in the ElastiCache User Guide.
This operation is valid for Redis only.
Parameters
-AtRestEncryptionEnabled <Boolean>
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 set AtRestEncryptionEnabled to true when you create the replication group. Required: Only available when creating a replication group in an Amazon VPC using redis version 3.2.6 or 4.x.Default: false | Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
-AuthToken <String>
Reserved parameter. The password used to access a password protected server.For HIPAA compliance, you must specify
AuthToken can be specified only on replication groups where TransitEncryptionEnabled is true.TransitEncryptionEnabled as true, an AuthToken, and a CacheSubnetGroup.- Must be only printable ASCII characters.
- Must be at least 16 characters and no more than 128 characters in length.
- Cannot contain any of the following characters: '/', '"', or '@'.
| Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
-AutomaticFailoverEnabled <Boolean>
Specifies whether a read-only replica is automatically promoted to read/write primary if the existing primary fails.If
true, Multi-AZ is enabled for this replication group. If false, Multi-AZ is disabled for this replication group.AutomaticFailoverEnabled must be enabled for Redis (cluster mode enabled) replication groups.Default: falseAmazon ElastiCache for Redis does not support Multi-AZ with automatic failover on:- Redis versions earlier than 2.8.6.
- Redis (cluster mode disabled): T1 and T2 cache node types.
- Redis (cluster mode enabled): T1 node types.
| Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
-AutoMinorVersionUpgrade <Boolean>
This parameter is currently disabled.
| Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
-CacheNodeType <String>
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: T2 node types:
cache.t2.micro,cache.t2.small,cache.t2.mediumM3 node types:cache.m3.medium,cache.m3.large,cache.m3.xlarge,cache.m3.2xlargeM4 node types:cache.m4.large,cache.m4.xlarge,cache.m4.2xlarge,cache.m4.4xlarge,cache.m4.10xlarge - Previous generation: (not recommended)T1 node types:
cache.t1.microM1 node types:cache.m1.small,cache.m1.medium,cache.m1.large,cache.m1.xlarge
- Current generation: T2 node types:
- Compute optimized:
- Previous generation: (not recommended)C1 node types:
cache.c1.xlarge
- Previous generation: (not recommended)C1 node types:
- Memory optimized:
- Current generation: R3 node types:
cache.r3.large,cache.r3.xlarge,cache.r3.2xlarge,cache.r3.4xlarge,cache.r3.8xlargeR4 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
- Current generation: R3 node types:
- All T2 instances are created in an Amazon Virtual Private Cloud (Amazon VPC).
- Redis (cluster mode disabled): Redis backup/restore is not supported on T1 and T2 instances.
- Redis (cluster mode enabled): Backup/restore is not supported on T1 instances.
- Redis Append-only files (AOF) functionality is not supported for T1 or T2 instances.
| Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
-CacheParameterGroupName <String>
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 Redis 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 Redis (cluster mode disabled) replication group, use
CacheParameterGroupName=default.redis3.2. - To create a Redis (cluster mode enabled) replication group, use
CacheParameterGroupName=default.redis3.2.cluster.on.
| Required? | False |
| Position? | Named |
| Accept pipeline input? | True (ByPropertyName) |
-CacheSecurityGroupName <String[]>
A list of cache security group names to associate with this replication group.
| Required? | False |
| Position? | Named |
| Accept pipeline input? | True (ByPropertyName) |
| Aliases | CacheSecurityGroupNames |
-CacheSubnetGroupName <String>
The name of the cache subnet group to be used for the replication group.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 Subnets and Subnet Groups.
| Required? | False |
| Position? | Named |
| Accept pipeline input? | True (ByPropertyName) |
-Engine <String>
The name of the cache engine to be used for the clusters in this replication group.
| Required? | False |
| Position? | Named |
| Accept pipeline input? | True (ByPropertyName) |
-EngineVersion <String>
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? | False |
| Position? | Named |
| Accept pipeline input? | True (ByPropertyName) |
-Force <SwitchParameter>
This parameter overrides confirmation prompts to force the cmdlet to continue its operation. This parameter should always be used with caution.
| Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
-NodeGroupConfiguration <NodeGroupConfiguration[]>
A list of node group (shard) configuration options. Each node group (shard) configuration has the following members:
PrimaryAvailabilityZone, ReplicaAvailabilityZones, ReplicaCount, and Slots.If you're creating a Redis (cluster mode disabled) or a Redis (cluster mode enabled) replication group, you can use this parameter to individually configure each node group (shard), or you can omit this parameter. However, when seeding a Redis (cluster mode enabled) cluster from a S3 rdb file, you must configure each node group (shard) using this parameter because you must specify the slots for each node group. | Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
-NotificationTopicArn <String>
The Amazon Resource Name (ARN) of the Amazon Simple Notification Service (SNS) topic to which notifications are sent.The Amazon SNS topic owner must be the same as the cluster owner.
| Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
-NumCacheCluster <Int32>
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 is true, the value of this parameter must be at least 2. If AutomaticFailoverEnabled is false 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? | False |
| Position? | Named |
| Accept pipeline input? | False |
| Aliases | NumCacheClusters |
-NumNodeGroup <Int32>
An optional parameter that specifies the number of node groups (shards) for this Redis (cluster mode enabled) replication group. For Redis (cluster mode disabled) either omit this parameter or set it to 1.Default: 1
| Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
| Aliases | NumNodeGroups |
-Port <Int32>
The port number on which each member of the replication group accepts connections.
| Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
-PreferredCacheClusterAZs <String[]>
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.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? | False |
| Position? | Named |
| Accept pipeline input? | False |
-PreferredMaintenanceWindow <String>
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: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:sunmontuewedthufrisat
sun:23:00-mon:01:30 | Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
-PrimaryClusterId <String>
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, or ReplicasPerNodeGroup is specified. | Required? | False |
| Position? | 1 |
| Accept pipeline input? | True (ByValue, ) |
-ReplicasPerNodeGroup <Int32>
An optional parameter that specifies the number of replica nodes in each node group (shard). Valid values are 0 to 5.
| Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
-ReplicationGroupDescription <String>
A user-created description for the replication group.
| Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
-ReplicationGroupId <String>
The replication group identifier. This parameter is stored as a lowercase string.Constraints:
- A name must contain from 1 to 20 alphanumeric characters or hyphens.
- The first character must be a letter.
- A name cannot end with a hyphen or contain two consecutive hyphens.
| Required? | False |
| Position? | Named |
| Accept pipeline input? | True (ByPropertyName) |
-SecurityGroupId <String[]>
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? | False |
| Position? | Named |
| Accept pipeline input? | False |
| Aliases | SecurityGroupIds |
-SnapshotArn <String[]>
A list of Amazon Resource Names (ARN) that uniquely identify the Redis 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? | False |
| Position? | Named |
| Accept pipeline input? | False |
| Aliases | SnapshotArns |
-SnapshotName <String>
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? | False |
| Position? | Named |
| Accept pipeline input? | True (ByPropertyName) |
-SnapshotRetentionLimit <Int32>
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? | False |
| Position? | Named |
| Accept pipeline input? | False |
-SnapshotWindow <String>
The daily time range (in UTC) during which ElastiCache begins taking a daily snapshot of your node group (shard).Example:
05:00-09:00If you do not specify this parameter, ElastiCache automatically chooses an appropriate time range. | Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
-Tag <Tag[]>
A list of cost allocation tags to be added to this resource. A tag is a key-value pair.
| Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
| Aliases | Tags |
-TransitEncryptionEnabled <Boolean>
A flag that enables in-transit encryption when set to For HIPAA compliance, you must specify
true.You cannot modify the value of TransitEncryptionEnabled after the cluster is created. To enable in-transit encryption on a cluster you must set TransitEncryptionEnabled to true when you create a cluster.This parameter is valid only if the Engine parameter is redis, the EngineVersion parameter is 3.2.6 or 4.x, and the cluster is being created in an Amazon VPC.If you enable in-transit encryption, you must also specify a value for CacheSubnetGroup.Required: Only available when creating a replication group in an Amazon VPC using redis version 3.2.6 or 4.x.Default: falseTransitEncryptionEnabled as true, an AuthToken, and a CacheSubnetGroup.| Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
Common Credential and Region Parameters
-AccessKey <String>
The AWS access key for the user account. This can be a temporary access key
if the corresponding session token is supplied to the -SessionToken parameter.
| Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
-Credential <AWSCredentials>
An AWSCredentials object instance containing access and secret key information,
and optionally a token for session-based credentials.
| Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
-ProfileLocation <String>
Used to specify the name and location of the ini-format credential file (shared with the AWS CLI and other AWS SDKs)
If this optional parameter is omitted this cmdlet will search the encrypted credential file used by the AWS SDK for .NET and AWS Toolkit for Visual Studio first. If the profile is not found then the cmdlet will search in the ini-format credential file at the default location: (user's home directory)\.aws\credentials. Note that the encrypted credential file is not supported on all platforms. It will be skipped when searching for profiles on Windows Nano Server, Mac, and Linux platforms.
If this parameter is specified then this cmdlet will only search the ini-format credential file at the location given.
As the current folder can vary in a shell or during script execution it is advised that you use specify a fully qualified path instead of a relative path.
| Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
-ProfileName <String>
The user-defined name of an AWS credentials or SAML-based role profile containing
credential information. The profile is expected to be found in the secure credential
file shared with the AWS SDK for .NET and AWS Toolkit for Visual Studio. You can also
specify the name of a profile stored in the .ini-format credential file used with
the AWS CLI and other AWS SDKs.
| Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
-NetworkCredential <PSCredential>
Used with SAML-based authentication when ProfileName references a SAML role profile.
Contains the network credentials to be supplied during authentication with the
configured identity provider's endpoint. This parameter is not required if the
user's default network identity can or should be used during authentication.
| Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
-SecretKey <String>
The AWS secret key for the user account. This can be a temporary secret key
if the corresponding session token is supplied to the -SessionToken parameter.
| Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
-SessionToken <String>
The session token if the access and secret keys are temporary session-based
credentials.
| Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
-Region <String>
The system name of the AWS region in which the operation should be invoked. For example, us-east-1, eu-west-1 etc.
| Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
-EndpointUrl <String>
The endpoint to make the call against.
Note: This parameter is primarily for internal AWS use and is not required/should not be specified for normal usage. The cmdlets normally determine which endpoint to call based on the region specified to the -Region parameter or set as default in the shell (via Set-DefaultAWSRegion). Only specify this parameter if you must direct the call to a specific custom endpoint.
| Required? | False |
| Position? | Named |
| Accept pipeline input? | False |
Inputs
You can pipe a String object to this cmdlet for the PrimaryClusterId parameter.
Outputs
This cmdlet returns a ReplicationGroup object.
The service call response (type Amazon.ElastiCache.Model.CreateReplicationGroupResponse) can also be referenced from properties attached to the cmdlet entry in the $AWSHistory stack.
Related Links
Supported Version
AWS Tools for PowerShell: 2.x.y.z
