copy-snapshot¶

Description¶

Makes a copy of an existing snapshot.

Note

This operation is valid for Redis only.

Warning

Users or groups that have permissions to use the CopySnapshot operation can create their own Amazon S3 buckets and copy snapshots to it. To control access to your snapshots, use an IAM policy to control who has the ability to use the CopySnapshot operation. For more information about using IAM to control the use of ElastiCache operations, see Exporting Snapshots and Authentication & Access Control .

You could receive the following error messages.

Error Messages

Error Message: The S3 bucket %s is outside of the region. Solution: Create an Amazon S3 bucket in the same region as your snapshot. For more information, see Step 1: Create an Amazon S3 Bucket in the ElastiCache User Guide.
Error Message: The S3 bucket %s does not exist. Solution: Create an Amazon S3 bucket in the same region as your snapshot. For more information, see Step 1: Create an Amazon S3 Bucket in the ElastiCache User Guide.
Error Message: The S3 bucket %s is not owned by the authenticated user. Solution: Create an Amazon S3 bucket in the same region as your snapshot. For more information, see Step 1: Create an Amazon S3 Bucket in the ElastiCache User Guide.
Error Message: The authenticated user does not have sufficient permissions to perform the desired activity. Solution: Contact your system administrator to get the needed permissions.
Error Message: The S3 bucket %s already contains an object with key %s. Solution: Give the TargetSnapshotName a new and unique value. If exporting a snapshot, you could alternatively create a new Amazon S3 bucket and use this same value for TargetSnapshotName .
Error Message: ElastiCache has not been granted READ permissions %s on the S3 Bucket. Solution: Add List and Read permissions on the bucket. For more information, see Step 2: Grant ElastiCache Access to Your Amazon S3 Bucket in the ElastiCache User Guide.
Error Message: ElastiCache has not been granted WRITE permissions %s on the S3 Bucket. Solution: Add Upload/Delete permissions on the bucket. For more information, see Step 2: Grant ElastiCache Access to Your Amazon S3 Bucket in the ElastiCache User Guide.
Error Message: ElastiCache has not been granted READ_ACP permissions %s on the S3 Bucket. Solution: Add View Permissions on the bucket. For more information, see Step 2: Grant ElastiCache Access to Your Amazon S3 Bucket in the ElastiCache User Guide.

Synopsis¶

  copy-snapshot
--source-snapshot-name <value>
--target-snapshot-name <value>
[--target-bucket <value>]
[--kms-key-id <value>]
[--cli-input-json | --cli-input-yaml]
[--generate-cli-skeleton <value>]
[--cli-auto-prompt <value>]

Options¶

--source-snapshot-name (string)

The name of an existing snapshot from which to make a copy.

--target-snapshot-name (string)

A name for the snapshot copy. ElastiCache does not permit overwriting a snapshot, therefore this name must be unique within its context - ElastiCache or an Amazon S3 bucket if exporting.

--target-bucket (string)

The Amazon S3 bucket to which the snapshot is exported. This parameter is used only when exporting a snapshot for external access.

When using this parameter to export a snapshot, be sure Amazon ElastiCache has the needed permissions to this S3 bucket. For more information, see Step 2: Grant ElastiCache Access to Your Amazon S3 Bucket in the Amazon ElastiCache User Guide .

For more information, see Exporting a Snapshot in the Amazon ElastiCache User Guide .

--kms-key-id (string)

The ID of the KMS key used to encrypt the target snapshot.

--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 copy a snapshot

The following copy-snapshot example makes a copy of an existing snapshot.

aws elasticache copy-snapshot \
    --source-snapshot-name "my-snapshot" \
    --target-snapshot-name "my-snapshot-copy"

Output:

{
    "Snapshot":{
        "Engine": "redis",
        "CacheParameterGroupName": "default.redis3.2",
        "VpcId": "vpc-3820329f3",
        "CacheClusterId": "my-redis4",
        "SnapshotRetentionLimit": 7,
        "NumCacheNodes": 1,
        "SnapshotName": "my-snapshot-copy",
        "CacheClusterCreateTime": "2016-12-21T22:24:04.955Z",
        "AutoMinorVersionUpgrade": true,
        "PreferredAvailabilityZone": "us-east-1c",
        "SnapshotStatus": "creating",
        "SnapshotSource": "manual",
        "SnapshotWindow": "07:00-08:00",
        "EngineVersion": "3.2.4",
        "NodeSnapshots": [
            {
                "CacheSize": "3 MB",
                "SnapshotCreateTime": "2016-12-28T07:00:52Z",
                "CacheNodeId": "0001",
                "CacheNodeCreateTime": "2016-12-21T22:24:04.955Z"
            }
        ],
        "CacheSubnetGroupName": "default",
        "Port": 6379,
        "PreferredMaintenanceWindow": "tue:09:30-tue:10:30",
        "CacheNodeType": "cache.m3.large"
    }
}

For more information, see Exporting a Backup in the Elasticache User Guide.

Output¶

Snapshot -> (structure)

Represents a copy of an entire Redis cluster as of the time when the snapshot was taken.

SnapshotName -> (string)

The name of a snapshot. For an automatic snapshot, the name is system-generated. For a manual snapshot, this is the user-provided name.

ReplicationGroupId -> (string)

The unique identifier of the source replication group.

ReplicationGroupDescription -> (string)

A description of the source replication group.

CacheClusterId -> (string)

The user-supplied identifier of the source cluster.

SnapshotStatus -> (string)

The status of the snapshot. Valid values: creating | available | restoring | copying | deleting .

SnapshotSource -> (string)

Indicates whether the snapshot is from an automatic backup (automated ) or was created manually (manual ).

CacheNodeType -> (string)

The name of the compute and memory capacity node type for the source 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 ) used by the source cluster.

EngineVersion -> (string)

The version of the cache engine version that is used by the source cluster.

NumCacheNodes -> (integer)

The number of cache nodes in the source 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 source cluster is located.

CacheClusterCreateTime -> (timestamp)

The date and time when the source 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

TopicArn -> (string)

The Amazon Resource Name (ARN) for the topic used by the source cluster for publishing notifications.

Port -> (integer)

The port number used by each cache nodes in the source cluster.

CacheParameterGroupName -> (string)

The cache parameter group that is associated with the source cluster.

CacheSubnetGroupName -> (string)

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

VpcId -> (string)

The Amazon Virtual Private Cloud identifier (VPC ID) of the cache subnet group for the source cluster.

AutoMinorVersionUpgrade -> (boolean)

This parameter is currently disabled.

SnapshotRetentionLimit -> (integer)

For an automatic snapshot, the number of days for which ElastiCache retains the snapshot before deleting it.

For manual snapshots, this field reflects the SnapshotRetentionLimit for the source cluster when the snapshot was created. This field is otherwise ignored: Manual snapshots do not expire, and can only be deleted using the DeleteSnapshot operation.

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

SnapshotWindow -> (string)

The daily time range during which ElastiCache takes daily snapshots of the source cluster.

NumNodeGroups -> (integer)

The number of node groups (shards) in this snapshot. When restoring from a snapshot, the number of node groups (shards) in the snapshot and in the restored replication group must be the same.

AutomaticFailover -> (string)

Indicates the status of automatic failover for the source Redis replication group.

NodeSnapshots -> (list)

A list of the cache nodes in the source cluster.

(structure)

Represents an individual cache node in a snapshot of a cluster.

CacheClusterId -> (string)

A unique identifier for the source cluster.

NodeGroupId -> (string)

A unique identifier for the source node group (shard).

CacheNodeId -> (string)

The cache node identifier for the node in the source cluster.

NodeGroupConfiguration -> (structure)

The configuration for the source node group (shard).

NodeGroupId -> (string)

Either the ElastiCache for Redis supplied 4-digit id or a user supplied id for the node group these configuration values apply to.

Slots -> (string)

A string that specifies the keyspace for a particular node group. Keyspaces range from 0 to 16,383. The string is in the format startkey-endkey .

Example: "0-3999"

ReplicaCount -> (integer)

The number of read replica nodes in this node group (shard).

PrimaryAvailabilityZone -> (string)

The Availability Zone where the primary node of this node group (shard) is launched.

ReplicaAvailabilityZones -> (list)

A list of Availability Zones to be used for the read replicas. The number of Availability Zones in this list must match the value of ReplicaCount or ReplicasPerNodeGroup if not specified.

(string)

CacheSize -> (string)

The size of the cache on the source cache node.

CacheNodeCreateTime -> (timestamp)

The date and time when the cache node was created in the source cluster.

SnapshotCreateTime -> (timestamp)

The date and time when the source node’s metadata and cache data set was obtained for the snapshot.

KmsKeyId -> (string)

The ID of the KMS key used to encrypt the snapshot.

ARN -> (string)

The ARN (Amazon Resource Name) of the snapshot.

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