AWS CLI Command Reference

[ aws . elasticache ]

create-cache-cluster

Description

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

This operation is not supported for Redis (cluster mode enabled) clusters.

See also: AWS API Documentation

See ‘aws help’ for descriptions of global parameters.

Synopsis

  create-cache-cluster
--cache-cluster-id <value>
[--replication-group-id <value>]
[--az-mode <value>]
[--preferred-availability-zone <value>]
[--preferred-availability-zones <value>]
[--num-cache-nodes <value>]
[--cache-node-type <value>]
[--engine <value>]
[--engine-version <value>]
[--cache-parameter-group-name <value>]
[--cache-subnet-group-name <value>]
[--cache-security-group-names <value>]
[--security-group-ids <value>]
[--tags <value>]
[--snapshot-arns <value>]
[--snapshot-name <value>]
[--preferred-maintenance-window <value>]
[--port <value>]
[--notification-topic-arn <value>]
[--auto-minor-version-upgrade | --no-auto-minor-version-upgrade]
[--snapshot-retention-limit <value>]
[--snapshot-window <value>]
[--auth-token <value>]
[--cli-input-json | --cli-input-yaml]
[--generate-cli-skeleton <value>]
[--cli-auto-prompt <value>]

Options

--cache-cluster-id (string)

The node group (shard) identifier. This parameter is stored as a lowercase string.

Constraints:

  • A name must contain from 1 to 50 alphanumeric characters or hyphens.

  • The first character must be a letter.

  • A name cannot end with a hyphen or contain two consecutive hyphens.

--replication-group-id (string)

The ID of the replication group to which this cluster should belong. If this parameter is specified, the cluster is added to the specified replication group as a read replica; otherwise, the 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 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 .

--az-mode (string)

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 clusters.

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

Possible values:

  • single-az

  • cross-az

--preferred-availability-zone (string)

The EC2 Availability Zone in which the cluster is created.

All nodes belonging to this 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.

--preferred-availability-zones (list)

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 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.

(string)

Syntax:

"string" "string" ...

--num-cache-nodes (integer)

The initial number of cache nodes that the 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/ .

--cache-node-type (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: 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 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: 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

Additional node type info

  • All current generation instance types are created in Amazon VPC by default.

  • Redis append-only files (AOF) are not supported for T1 or T2 instances.

  • Redis Multi-AZ with automatic failover is not supported on T1 instances.

  • Redis configuration variables appendonly and appendfsync are not supported on Redis version 2.8.22 and later.

--engine (string)

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

Valid values for this parameter are: memcached | redis

--engine-version (string)

The version number of the cache engine to be used for this 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 cluster or replication group and create it anew with the earlier engine version.

--cache-parameter-group-name (string)

The name of the parameter group to associate with this 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.

--cache-subnet-group-name (string)

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

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

Warning

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 .

--cache-security-group-names (list)

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

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

(string)

Syntax:

"string" "string" ...

--security-group-ids (list)

One or more VPC security groups associated with the cluster.

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

(string)

Syntax:

"string" "string" ...

--tags (list)

A list of cost allocation tags to be added to this resource.

(structure)

A cost allocation Tag that can be added to an ElastiCache cluster or replication group. Tags are composed of a Key/Value pair. A tag with a null Value is permitted.

Key -> (string)

The key for the tag. May not be null.

Value -> (string)

The tag’s value. May be null.

Shorthand Syntax:

Key=string,Value=string ...

JSON Syntax:

[
  {
    "Key": "string",
    "Value": "string"
  }
  ...
]

--snapshot-arns (list)

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

(string)

Syntax:

"string" "string" ...

--snapshot-name (string)

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 .

--preferred-maintenance-window (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:

  • sun

  • mon

  • tue

  • wed

  • thu

  • fri

  • sat

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

--port (integer)

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

--notification-topic-arn (string)

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.

--auto-minor-version-upgrade | --no-auto-minor-version-upgrade (boolean)

This parameter is currently disabled.

--snapshot-retention-limit (integer)

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).

--snapshot-window (string)

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 .

--auth-token (string)

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.

  • The only permitted printable special characters are !, &, #, $, ^, <, >, and -. Other printable special characters cannot be used in the AUTH token.

For more information, see AUTH password at http://redis.io/commands/AUTH.

--cli-input-json | --cli-input-yaml (string) Reads arguments from the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, those values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally. This may not be specified along with --cli-input-yaml.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. Similarly, if provided yaml-input it will print a sample input YAML that can be used with --cli-input-yaml. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

--cli-auto-prompt (boolean) Automatically prompt for CLI input parameters.

See ‘aws help’ for descriptions of global parameters.

Examples

To create a cache cluster

The following create-cache-cluster example creates a cache cluster using the Redis engine.

aws elasticache create-cache-cluster \
    -- cache-cluster-id "cluster-test" \
    --engine redis \
    --cache-node-type cache.m5.large \
    --num-cache-nodes 1

Output:

{
    "CacheCluster": {
        "CacheClusterId": "cluster-test",
        "ClientDownloadLandingPage": "https://console.aws.amazon.com/elasticache/home#client-download:",
        "CacheNodeType": "cache.m5.large",
        "Engine": "redis",
        "EngineVersion": "5.0.5",
        "CacheClusterStatus": "creating",
        "NumCacheNodes": 1,
        "PreferredMaintenanceWindow": "sat:13:00-sat:14:00",
        "PendingModifiedValues": {},
        "CacheSecurityGroups": [],
        "CacheParameterGroup": {
            "CacheParameterGroupName": "default.redis5.0",
            "ParameterApplyStatus": "in-sync",
            "CacheNodeIdsToReboot": []
        },
        "CacheSubnetGroupName": "default",
        "AutoMinorVersionUpgrade": true,
        "SnapshotRetentionLimit": 0,
        "SnapshotWindow": "06:30-07:30",
        "TransitEncryptionEnabled": false,
        "AtRestEncryptionEnabled": false
    }
}

For more information, see Creating a Cluster in the Elasticache User Guide.

Output

CacheCluster -> (structure)

Contains all of the attributes of a specific cluster.

CacheClusterId -> (string)

The user-supplied identifier of the cluster. This identifier is a unique key that identifies a cluster.

ConfigurationEndpoint -> (structure)

Represents a Memcached cluster endpoint which, if Automatic Discovery is enabled on the cluster, can be used by an application to connect to any node in the cluster. The configuration endpoint will always have .cfg in it.

Example: mem-3.9dvc4r.cfg.usw2.cache.amazonaws.com:11211

Address -> (string)

The DNS hostname of the cache node.

Port -> (integer)

The port number that the cache engine is listening on.

ClientDownloadLandingPage -> (string)

The URL of the web page where you can download the latest ElastiCache client library.

CacheNodeType -> (string)

The name of the compute and memory capacity node type for the cluster.

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: 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 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: 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

Additional node type info

  • All current generation instance types are created in Amazon VPC by default.

  • Redis append-only files (AOF) are not supported for T1 or T2 instances.

  • Redis Multi-AZ with automatic failover is not supported on T1 instances.

  • Redis configuration variables appendonly and appendfsync are not supported on Redis version 2.8.22 and later.

Engine -> (string)

The name of the cache engine (memcached or redis ) to be used for this cluster.

EngineVersion -> (string)

The version of the cache engine that is used in this cluster.

CacheClusterStatus -> (string)

The current state of this cluster, one of the following values: available , creating , deleted , deleting , incompatible-network , modifying , rebooting cluster nodes , restore-failed , or snapshotting .

NumCacheNodes -> (integer)

The number of cache nodes in the cluster.

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

PreferredAvailabilityZone -> (string)

The name of the Availability Zone in which the cluster is located or “Multiple” if the cache nodes are located in different Availability Zones.

CacheClusterCreateTime -> (timestamp)

The date and time when the cluster was created.

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:

  • sun

  • mon

  • tue

  • wed

  • thu

  • fri

  • sat

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

PendingModifiedValues -> (structure)

A group of settings that are applied to the cluster in the future, or that are currently being applied.

NumCacheNodes -> (integer)

The new number of cache nodes for the cluster.

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

CacheNodeIdsToRemove -> (list)

A list of cache node IDs that are being removed (or will be removed) from the cluster. A node ID is a 4-digit numeric identifier (0001, 0002, etc.).

(string)

EngineVersion -> (string)

The new cache engine version that the cluster runs.

CacheNodeType -> (string)

The cache node type that this cluster or replication group is scaled to.

AuthTokenStatus -> (string)

The auth token status

NotificationConfiguration -> (structure)

Describes a notification topic and its status. Notification topics are used for publishing ElastiCache events to subscribers using Amazon Simple Notification Service (SNS).

TopicArn -> (string)

The Amazon Resource Name (ARN) that identifies the topic.

TopicStatus -> (string)

The current state of the topic.

CacheSecurityGroups -> (list)

A list of cache security group elements, composed of name and status sub-elements.

(structure)

Represents a cluster’s status within a particular cache security group.

CacheSecurityGroupName -> (string)

The name of the cache security group.

Status -> (string)

The membership status in the cache security group. The status changes when a cache security group is modified, or when the cache security groups assigned to a cluster are modified.

CacheParameterGroup -> (structure)

Status of the cache parameter group.

CacheParameterGroupName -> (string)

The name of the cache parameter group.

ParameterApplyStatus -> (string)

The status of parameter updates.

CacheNodeIdsToReboot -> (list)

A list of the cache node IDs which need to be rebooted for parameter changes to be applied. A node ID is a numeric identifier (0001, 0002, etc.).

(string)

CacheSubnetGroupName -> (string)

The name of the cache subnet group associated with the cluster.

CacheNodes -> (list)

A list of cache nodes that are members of the cluster.

(structure)

Represents an individual cache node within a cluster. Each cache node runs its own instance of the cluster’s protocol-compliant caching software - either Memcached or Redis.

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: 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 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: 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

Additional node type info

  • All current generation instance types are created in Amazon VPC by default.

  • Redis append-only files (AOF) are not supported for T1 or T2 instances.

  • Redis Multi-AZ with automatic failover is not supported on T1 instances.

  • Redis configuration variables appendonly and appendfsync are not supported on Redis version 2.8.22 and later.

CacheNodeId -> (string)

The cache node identifier. A node ID is a numeric identifier (0001, 0002, etc.). The combination of cluster ID and node ID uniquely identifies every cache node used in a customer’s AWS account.

CacheNodeStatus -> (string)

The current state of this cache node, one of the following values: available , creating , rebooting , or deleting .

CacheNodeCreateTime -> (timestamp)

The date and time when the cache node was created.

Endpoint -> (structure)

The hostname for connecting to this cache node.

Address -> (string)

The DNS hostname of the cache node.

Port -> (integer)

The port number that the cache engine is listening on.

ParameterGroupStatus -> (string)

The status of the parameter group applied to this cache node.

SourceCacheNodeId -> (string)

The ID of the primary node to which this read replica node is synchronized. If this field is empty, this node is not associated with a primary cluster.

CustomerAvailabilityZone -> (string)

The Availability Zone where this node was created and now resides.

AutoMinorVersionUpgrade -> (boolean)

This parameter is currently disabled.

SecurityGroups -> (list)

A list of VPC Security Groups associated with the cluster.

(structure)

Represents a single cache security group and its status.

SecurityGroupId -> (string)

The identifier of the cache security group.

Status -> (string)

The status of the cache security group membership. The status changes whenever a cache security group is modified, or when the cache security groups assigned to a cluster are modified.

ReplicationGroupId -> (string)

The replication group to which this cluster belongs. If this field is empty, the cluster is not associated with any replication group.

SnapshotRetentionLimit -> (integer)

The number of days for which ElastiCache retains automatic cluster 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.

Warning

If the value of SnapshotRetentionLimit is set to zero (0), backups are turned off.

SnapshotWindow -> (string)

The daily time range (in UTC) during which ElastiCache begins taking a daily snapshot of your cluster.

Example: 05:00-09:00

AuthTokenEnabled -> (boolean)

A flag that enables using an AuthToken (password) when issuing Redis commands.

Default: false

AuthTokenLastModifiedDate -> (timestamp)

The date the auth token was last modified

TransitEncryptionEnabled -> (boolean)

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 set TransitEncryptionEnabled to true when you create a cluster.

Required: Only available when creating a replication group in an Amazon VPC using redis version 3.2.6 , 4.x or later.

Default: false

AtRestEncryptionEnabled -> (boolean)

A flag that enables encryption at-rest when set to true .

You cannot modify the value of AtRestEncryptionEnabled after the cluster is created. To enable at-rest encryption on a cluster you must set AtRestEncryptionEnabled to true when you create a cluster.

Required: Only available when creating a replication group in an Amazon VPC using redis version 3.2.6 , 4.x or later.

Default: false

ARN -> (string)

The ARN (Amazon Resource Name) of the cache cluster.

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