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Amazon ElastiCache
API Reference (API Version 2015-02-02)

CreateCacheCluster

Creates a cache cluster. All nodes in the cache cluster run the same protocol-compliant cache engine software, either Memcached or Redis.

Important

Due to current limitations on Redis (cluster mode disabled), this operation or parameter is not supported on Redis (cluster mode enabled) replication groups.

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.

CacheClusterId

The node group (shard) 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.

Type: String

Required: Yes

AuthToken

Reserved parameter. The password used to access a password protected server.

Password constraints:

  • 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 "@".

For more information, see AUTH password at Redis.

Type: String

Required: No

AutoMinorVersionUpgrade

This parameter is currently disabled.

Type: Boolean

Required: No

AZMode

Specifies whether the nodes in this Memcached cluster are created in a single Availability Zone or created across multiple Availability Zones in the cluster's region.

This parameter is only supported for Memcached cache clusters.

If the AZMode and PreferredAvailabilityZones are not specified, ElastiCache assumes single-az mode.

Type: String

Valid Values: single-az | cross-az

Required: No

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:

      T2 node types: cache.t2.micro, cache.t2.small, cache.t2.medium

      M3 node types: cache.m3.medium, cache.m3.large, cache.m3.xlarge, cache.m3.2xlarge

      M4 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.micro

      M1 node types: cache.m1.small, cache.m1.medium, cache.m1.large, cache.m1.xlarge

  • Compute optimized:

    • Previous generation: (not recommended)

      C1 node types: cache.c1.xlarge

  • Memory optimized:

    • Current generation:

      R3 node types: cache.r3.large, cache.r3.xlarge, cache.r3.2xlarge, cache.r3.4xlarge, cache.r3.8xlarge

    • Previous generation: (not recommended)

      M2 node types: cache.m2.xlarge, cache.m2.2xlarge, cache.m2.4xlarge

Notes:

  • 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.

Supported node types are available in all regions except as noted in the following table.

For a complete listing of node types and specifications, see Amazon ElastiCache Product Features and Details and either Cache Node Type-Specific Parameters for Memcached or Cache Node Type-Specific Parameters for Redis.

Type: String

Required: No

CacheParameterGroupName

The name of the parameter group to associate with this cache cluster. If this argument is omitted, the default parameter group for the specified engine is used. You cannot use any parameter group which has cluster-enabled='yes' when creating a cluster.

Type: String

Required: No

CacheSecurityGroupNames.CacheSecurityGroupName.N

A list of security group names to associate with this cache cluster.

Use this parameter only when you are creating a cache cluster outside of an Amazon Virtual Private Cloud (Amazon VPC).

Type: Array of strings

Required: No

CacheSubnetGroupName

The name of the subnet group to be used for the cache cluster.

Use this parameter only when you are creating a cache cluster in an Amazon Virtual Private Cloud (Amazon VPC).

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 Subnets and Subnet Groups.

Type: String

Required: No

Engine

The name of the cache engine to be used for this cache cluster.

Valid values for this parameter are: memcached | redis

Type: String

Required: No

EngineVersion

The version number of the cache engine to be used for this cache cluster. 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), but you cannot downgrade to an earlier engine version. If you want to use an earlier engine version, you must delete the existing cache cluster or replication group and create it anew with the earlier engine version.

Type: String

Required: No

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 cache cluster owner.

Type: String

Required: No

NumCacheNodes

The initial number of cache nodes that the cache cluster has.

For clusters running Redis, this value must be 1. For clusters running Memcached, this value must be between 1 and 20.

If you need more than 20 nodes for your Memcached cluster, please fill out the ElastiCache Limit Increase Request form at http://aws.amazon.com/contact-us/elasticache-node-limit-request/.

Type: Integer

Required: No

Port

The port number on which each of the cache nodes accepts connections.

Type: Integer

Required: No

PreferredAvailabilityZone

The EC2 Availability Zone in which the cache cluster is created.

All nodes belonging to this Memcached cache cluster are placed in the preferred Availability Zone. If you want to create your nodes across multiple Availability Zones, use PreferredAvailabilityZones.

Default: System chosen Availability Zone.

Type: String

Required: No

PreferredAvailabilityZones.PreferredAvailabilityZone.N

A list of the Availability Zones in which cache nodes are created. The order of the zones in the list is not important.

This option is only supported on Memcached.

Note

If you are creating your cache cluster in an Amazon VPC (recommended) you can only locate nodes in Availability Zones that are associated with the subnets in the selected subnet group.

The number of Availability Zones listed must equal the value of NumCacheNodes.

If you want all the nodes in the same Availability Zone, use PreferredAvailabilityZone instead, or repeat the Availability Zone multiple times in the list.

Default: System chosen Availability Zones.

Type: Array of strings

Required: No

PreferredMaintenanceWindow

Specifies the weekly time range during which maintenance on the cache 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:

  • sun

  • mon

  • tue

  • wed

  • thu

  • fri

  • sat

Example: sun:23:00-mon:01:30

Type: String

Required: No

ReplicationGroupId

Important

Due to current limitations on Redis (cluster mode disabled), this operation or parameter is not supported on Redis (cluster mode enabled) replication groups.

The ID of the replication group to which this cache cluster should belong. If this parameter is specified, the cache cluster is added to the specified replication group as a read replica; otherwise, the cache cluster is a standalone primary that is not part of any replication group.

If the specified replication group is Multi-AZ enabled and the Availability Zone is not specified, the cache cluster is created in Availability Zones that provide the best spread of read replicas across Availability Zones.

Note

This parameter is only valid if the Engine parameter is redis.

Type: String

Required: No

SecurityGroupIds.SecurityGroupId.N

One or more VPC security groups associated with the cache cluster.

Use this parameter only when you are creating a cache cluster in an Amazon Virtual Private Cloud (Amazon VPC).

Type: Array of strings

Required: No

SnapshotArns.SnapshotArn.N

A single-element string list containing an Amazon Resource Name (ARN) that uniquely identifies a Redis RDB snapshot file stored in Amazon S3. The snapshot file is used to populate the node group (shard). The Amazon S3 object name in the ARN cannot contain any commas.

Note

This parameter is only valid if the Engine parameter is redis.

Example of an Amazon S3 ARN: arn:aws:s3:::my_bucket/snapshot1.rdb

Type: Array of strings

Required: No

SnapshotName

The name of a Redis snapshot from which to restore data into the new node group (shard). The snapshot status changes to restoring while the new node group (shard) is being created.

Note

This parameter is only valid if the Engine parameter is redis.

Type: String

Required: No

SnapshotRetentionLimit

The number of days for which ElastiCache retains automatic snapshots before deleting them. For example, if you set SnapshotRetentionLimit to 5, a snapshot taken today is retained for 5 days before being deleted.

Note

This parameter is only valid if the Engine parameter is redis.

Default: 0 (i.e., automatic backups are disabled for this cache cluster).

Type: Integer

Required: No

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.

Note: This parameter is only valid if the Engine parameter is redis.

Type: String

Required: No

Tags.Tag.N

A list of cost allocation tags to be added to this resource. A tag is a key-value pair. A tag key must be accompanied by a tag value.

Type: Array of Tag objects

Required: No

Response Elements

The following element is returned by the service.

CacheCluster

Contains all of the attributes of a specific cache cluster.

Type: CacheCluster object

Errors

For information about the errors that are common to all actions, see Common Errors.

CacheClusterAlreadyExists

You already have a cache cluster with the given identifier.

HTTP Status Code: 400

CacheParameterGroupNotFound

The requested cache parameter group name does not refer to an existing cache parameter group.

HTTP Status Code: 404

CacheSecurityGroupNotFound

The requested cache security group name does not refer to an existing cache security group.

HTTP Status Code: 404

CacheSubnetGroupNotFoundFault

The requested cache subnet group name does not refer to an existing cache subnet group.

HTTP Status Code: 400

ClusterQuotaForCustomerExceeded

The request cannot be processed because it would exceed the allowed number of cache clusters per customer.

HTTP Status Code: 400

InsufficientCacheClusterCapacity

The requested cache node type is not available in the specified Availability Zone.

HTTP Status Code: 400

InvalidParameterCombination

Two or more incompatible parameters were specified.

HTTP Status Code: 400

InvalidParameterValue

The value for a parameter is invalid.

HTTP Status Code: 400

InvalidReplicationGroupState

The requested replication group is not in the available state.

HTTP Status Code: 400

InvalidVPCNetworkStateFault

The VPC network is in an invalid state.

HTTP Status Code: 400

NodeQuotaForClusterExceeded

The request cannot be processed because it would exceed the allowed number of cache nodes in a single cache cluster.

HTTP Status Code: 400

NodeQuotaForCustomerExceeded

The request cannot be processed because it would exceed the allowed number of cache nodes per customer.

HTTP Status Code: 400

ReplicationGroupNotFoundFault

The specified replication group does not exist.

HTTP Status Code: 404

TagQuotaPerResourceExceeded

The request cannot be processed because it would cause the resource to have more than the allowed number of tags. The maximum number of tags permitted on a resource is 50.

HTTP Status Code: 400

Example

Sample Request

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https://elasticache.us-west-2.amazonaws.com/ ?Action=CreateCacheCluster &CacheClusterId=myMemcachedCluster &CacheNodeType=cache.m1.small &CacheSecurityGroupNames.member.1=default &Engine=memcached &NumCacheNodes=3 &PreferredAvailabilityZones.member.1=us-west-2a &PreferredAvailabilityZones.member.2=us-west-2b &PreferredAvailabilityZones.member.3=us-west-2c &SignatureMethod=HmacSHA256 &SignatureVersion=4 &Version=2015-02-02 &X-Amz-Algorithm=AWS4-HMAC-SHA256 &X-Amz-Credential=[your-access-key-id]/20150202/us-west-2/elasticache/aws4_request &X-Amz-Date=20150202T170651Z &X-Amz-SignedHeaders=content-type;host;user-agent;x-amz-content-sha256;x-amz-date &X-Amz-Signature=[signature-value]

Sample Response

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<CreateCacheClusterResponse xmlns="http://elasticache.amazonaws.com/doc/2015-02-02/"> <CreateCacheClusterResult> <CacheCluster> <CacheClusterId>russherm-api-test</CacheClusterId> <CacheClusterStatus>creating</CacheClusterStatus> <CacheParameterGroup> <CacheParameterGroupName>default.memcached1.4</CacheParameterGroupName> <ParameterApplyStatus>in-sync</ParameterApplyStatus> <CacheNodeIdsToReboot/> </CacheParameterGroup> <CacheNodeType>cache.m1.small</CacheNodeType> <Engine>memcached</Engine> <PendingModifiedValues/> <EngineVersion>1.4.14</EngineVersion> <AutoMinorVersionUpgrade>true</AutoMinorVersionUpgrade> <PreferredMaintenanceWindow>sat:09:00-sat:10:00</PreferredMaintenanceWindow> <ClientDownloadLandingPage>https://console.aws.amazon.com/elasticache/home#client-download:</ClientDownloadLandingPage> <CacheSecurityGroups> <CacheSecurityGroup> <CacheSecurityGroupName>default</CacheSecurityGroupName> <Status>active</Status> </CacheSecurityGroup> </CacheSecurityGroups> <NumCacheNodes>3</NumCacheNodes> </CacheCluster> </CreateCacheClusterResult> <ResponseMetadata> <RequestId>69134921-10f9-11e4-81bb-d76bad68b8fd</RequestId> </ResponseMetadata> </CreateCacheClusterResponse>

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: