2018/09/17 - Amazon ElastiCache - 2 new 8 updated api methods
Changes ElastiCache for Redis added support for adding and removing read-replicas from any cluster with no cluster downtime, Shard naming: ElastiCache for Redis customers have the option of allowing ElastiCache to create names for their node groups (shards) or generating their own node group names. For more information, see https:// docs.aws.amazon.com/AmazonElastiCache/latest/APIReference/API_NodeGroupConfiguration.html, ShardsToRetain: When reducing the number of node groups (shards) in an ElastiCache for Redis (cluster mode enabled) you have the option of specifying which node groups to retain or which node groups to remove. For more information, see https:// docs.aws.amazon.com/AmazonElastiCache/latest/APIReference/API_ModifyReplicationGroupShardConfiguration.html, ReservationARN: ReservedNode includes an ARN, ReservationARN, member which identifies the reserved node. For more information, see https:// docs.aws.amazon.com/AmazonElastiCache/latest/APIReference/API_ReservedCacheNode.html
Dynamically increases the number of replics in a Redis (cluster mode disabled) replication group or the number of replica nodes in one or more node groups (shards) of a Redis (cluster mode enabled) replication group. This operation is performed with no cluster down time.
See also: AWS API Documentation
Request Syntax
client.increase_replica_count(
ReplicationGroupId='string',
NewReplicaCount=123,
ReplicaConfiguration=[
{
'NodeGroupId': 'string',
'NewReplicaCount': 123,
'PreferredAvailabilityZones': [
'string',
]
},
],
ApplyImmediately=True|False
)
string
[REQUIRED]
The id of the replication group to which you want to add replica nodes.
integer
The number of read replica nodes you want at the completion of this operation. For Redis (cluster mode disabled) replication groups, this is the number of replica nodes in the replication group. For Redis (cluster mode enabled) replication groups, this is the number of replica nodes in each of the replication group's node groups.
list
A list of ConfigureShard objects that can be used to configure each shard in a Redis (cluster mode enabled) replication group. The ConfigureShard has three members: NewReplicaCount , NodeGroupId , and PreferredAvailabilityZones .
(dict) --
Node group (shard) configuration options when adding or removing replicas. Each node group (shard) configuration has the following members: NodeGroupId, NewReplicaCount, and PreferredAvailabilityZones.
NodeGroupId (string) -- [REQUIRED]
The 4-digit id for the node group you are configuring. For Redis (cluster mode disabled) replication groups, the node group id is always 0001. To find a Redis (cluster mode enabled)'s node group's (shard's) id, see Finding a Shard's Id .
NewReplicaCount (integer) -- [REQUIRED]
The number of replicas you want in this node group at the end of this operation. The maximum value for NewReplicaCount is 5. The minimum value depends upon the type of Redis replication group you are working with.
The minimum number of replicas in a shard or replication group is:
Redis (cluster mode disabled)
If Multi-AZ with Automatic Failover is enabled: 1
If Multi-AZ with Automatic Failover is not enable: 0
Redis (cluster mode enabled): 0 (though you will not be able to failover to a replica if your primary node fails)
PreferredAvailabilityZones (list) --
A list of PreferredAvailabilityZone strings that specify which availability zones the replication group's nodes are to be in. The nummber of PreferredAvailabilityZone values must equal the value of NewReplicaCount plus 1 to account for the primary node. If this member of ReplicaConfiguration is omitted, ElastiCache for Redis selects the availability zone for each of the replicas.
(string) --
boolean
[REQUIRED]
If True , the number of replica nodes is increased immediately. If False , the number of replica nodes is increased during the next maintenance window.
dict
Response Syntax
{
'ReplicationGroup': {
'ReplicationGroupId': 'string',
'Description': 'string',
'Status': 'string',
'PendingModifiedValues': {
'PrimaryClusterId': 'string',
'AutomaticFailoverStatus': 'enabled'|'disabled',
'Resharding': {
'SlotMigration': {
'ProgressPercentage': 123.0
}
}
},
'MemberClusters': [
'string',
],
'NodeGroups': [
{
'NodeGroupId': 'string',
'Status': 'string',
'PrimaryEndpoint': {
'Address': 'string',
'Port': 123
},
'Slots': 'string',
'NodeGroupMembers': [
{
'CacheClusterId': 'string',
'CacheNodeId': 'string',
'ReadEndpoint': {
'Address': 'string',
'Port': 123
},
'PreferredAvailabilityZone': 'string',
'CurrentRole': 'string'
},
]
},
],
'SnapshottingClusterId': 'string',
'AutomaticFailover': 'enabled'|'disabled'|'enabling'|'disabling',
'ConfigurationEndpoint': {
'Address': 'string',
'Port': 123
},
'SnapshotRetentionLimit': 123,
'SnapshotWindow': 'string',
'ClusterEnabled': True|False,
'CacheNodeType': 'string',
'AuthTokenEnabled': True|False,
'TransitEncryptionEnabled': True|False,
'AtRestEncryptionEnabled': True|False
}
}
Response Structure
(dict) --
ReplicationGroup (dict) --
Contains all of the attributes of a specific Redis replication group.
ReplicationGroupId (string) --
The identifier for the replication group.
Description (string) --
The user supplied description of the replication group.
Status (string) --
The current state of this replication group - creating , available , modifying , deleting , create-failed , snapshotting .
PendingModifiedValues (dict) --
A group of settings to be applied to the replication group, either immediately or during the next maintenance window.
PrimaryClusterId (string) --
The primary cluster ID that is applied immediately (if --apply-immediately was specified), or during the next maintenance window.
AutomaticFailoverStatus (string) --
Indicates the status of Multi-AZ with automatic failover for this Redis replication group.
Amazon 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.
Resharding (dict) --
The status of an online resharding operation.
SlotMigration (dict) --
Represents the progress of an online resharding operation.
ProgressPercentage (float) --
The percentage of the slot migration that is complete.
MemberClusters (list) --
The names of all the cache clusters that are part of this replication group.
(string) --
NodeGroups (list) --
A list of node groups in this replication group. For Redis (cluster mode disabled) replication groups, this is a single-element list. For Redis (cluster mode enabled) replication groups, the list contains an entry for each node group (shard).
(dict) --
Represents a collection of cache nodes in a replication group. One node in the node group is the read/write primary node. All the other nodes are read-only Replica nodes.
NodeGroupId (string) --
The identifier for the node group (shard). A Redis (cluster mode disabled) replication group contains only 1 node group; therefore, the node group ID is 0001. A Redis (cluster mode enabled) replication group contains 1 to 15 node groups numbered 0001 to 0015.
Status (string) --
The current state of this replication group - creating , available , etc.
PrimaryEndpoint (dict) --
The endpoint of the primary node in this node group (shard).
Address (string) --
The DNS hostname of the cache node.
Port (integer) --
The port number that the cache engine is listening on.
Slots (string) --
The keyspace for this node group (shard).
NodeGroupMembers (list) --
A list containing information about individual nodes within the node group (shard).
(dict) --
Represents a single node within a node group (shard).
CacheClusterId (string) --
The ID of the cluster to which the node belongs.
CacheNodeId (string) --
The ID of the node within its cluster. A node ID is a numeric identifier (0001, 0002, etc.).
ReadEndpoint (dict) --
The information required for client programs to connect to a node for read operations. The read endpoint is only applicable on Redis (cluster mode disabled) clusters.
Address (string) --
The DNS hostname of the cache node.
Port (integer) --
The port number that the cache engine is listening on.
PreferredAvailabilityZone (string) --
The name of the Availability Zone in which the node is located.
CurrentRole (string) --
The role that is currently assigned to the node - primary or replica . This member is only applicable for Redis (cluster mode disabled) replication groups.
SnapshottingClusterId (string) --
The cluster ID that is used as the daily snapshot source for the replication group.
AutomaticFailover (string) --
Indicates the status of Multi-AZ with automatic failover for this Redis replication group.
Amazon 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.
ConfigurationEndpoint (dict) --
The configuration endpoint for this replication group. Use the configuration endpoint to connect to this replication group.
Address (string) --
The DNS hostname of the cache node.
Port (integer) --
The port number that the cache engine is listening on.
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 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 .
ClusterEnabled (boolean) --
A flag indicating whether or not this replication group is cluster enabled; i.e., whether its data can be partitioned across multiple shards (API/CLI: node groups).
Valid values: true | false
CacheNodeType (string) --
The name of the compute and memory capacity node type for each node in the replication group.
AuthTokenEnabled (boolean) --
A flag that enables using an AuthToken (password) when issuing Redis commands.
Default: false
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 or 4.x .
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 encryption at-rest 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 or 4.x .
Default: false
Dynamically decreases the number of replics in a Redis (cluster mode disabled) replication group or the number of replica nodes in one or more node groups (shards) of a Redis (cluster mode enabled) replication group. This operation is performed with no cluster down time.
See also: AWS API Documentation
Request Syntax
client.decrease_replica_count(
ReplicationGroupId='string',
NewReplicaCount=123,
ReplicaConfiguration=[
{
'NodeGroupId': 'string',
'NewReplicaCount': 123,
'PreferredAvailabilityZones': [
'string',
]
},
],
ReplicasToRemove=[
'string',
],
ApplyImmediately=True|False
)
string
[REQUIRED]
The id of the replication group from which you want to remove replica nodes.
integer
The number of read replica nodes you want at the completion of this operation. For Redis (cluster mode disabled) replication groups, this is the number of replica nodes in the replication group. For Redis (cluster mode enabled) replication groups, this is the number of replica nodes in each of the replication group's node groups.
The minimum number of replicas in a shard or replication group is:
Redis (cluster mode disabled)
If Multi-AZ with Automatic Failover is enabled: 1
If Multi-AZ with Automatic Failover is not enabled: 0
Redis (cluster mode enabled): 0 (though you will not be able to failover to a replica if your primary node fails)
list
A list of ConfigureShard objects that can be used to configure each shard in a Redis (cluster mode enabled) replication group. The ConfigureShard has three members: NewReplicaCount , NodeGroupId , and PreferredAvailabilityZones .
(dict) --
Node group (shard) configuration options when adding or removing replicas. Each node group (shard) configuration has the following members: NodeGroupId, NewReplicaCount, and PreferredAvailabilityZones.
NodeGroupId (string) -- [REQUIRED]
The 4-digit id for the node group you are configuring. For Redis (cluster mode disabled) replication groups, the node group id is always 0001. To find a Redis (cluster mode enabled)'s node group's (shard's) id, see Finding a Shard's Id .
NewReplicaCount (integer) -- [REQUIRED]
The number of replicas you want in this node group at the end of this operation. The maximum value for NewReplicaCount is 5. The minimum value depends upon the type of Redis replication group you are working with.
The minimum number of replicas in a shard or replication group is:
Redis (cluster mode disabled)
If Multi-AZ with Automatic Failover is enabled: 1
If Multi-AZ with Automatic Failover is not enable: 0
Redis (cluster mode enabled): 0 (though you will not be able to failover to a replica if your primary node fails)
PreferredAvailabilityZones (list) --
A list of PreferredAvailabilityZone strings that specify which availability zones the replication group's nodes are to be in. The nummber of PreferredAvailabilityZone values must equal the value of NewReplicaCount plus 1 to account for the primary node. If this member of ReplicaConfiguration is omitted, ElastiCache for Redis selects the availability zone for each of the replicas.
(string) --
list
A list of the node ids to remove from the replication group or node group (shard).
(string) --
boolean
[REQUIRED]
If True , the number of replica nodes is decreased immediately. If False , the number of replica nodes is decreased during the next maintenance window.
dict
Response Syntax
{
'ReplicationGroup': {
'ReplicationGroupId': 'string',
'Description': 'string',
'Status': 'string',
'PendingModifiedValues': {
'PrimaryClusterId': 'string',
'AutomaticFailoverStatus': 'enabled'|'disabled',
'Resharding': {
'SlotMigration': {
'ProgressPercentage': 123.0
}
}
},
'MemberClusters': [
'string',
],
'NodeGroups': [
{
'NodeGroupId': 'string',
'Status': 'string',
'PrimaryEndpoint': {
'Address': 'string',
'Port': 123
},
'Slots': 'string',
'NodeGroupMembers': [
{
'CacheClusterId': 'string',
'CacheNodeId': 'string',
'ReadEndpoint': {
'Address': 'string',
'Port': 123
},
'PreferredAvailabilityZone': 'string',
'CurrentRole': 'string'
},
]
},
],
'SnapshottingClusterId': 'string',
'AutomaticFailover': 'enabled'|'disabled'|'enabling'|'disabling',
'ConfigurationEndpoint': {
'Address': 'string',
'Port': 123
},
'SnapshotRetentionLimit': 123,
'SnapshotWindow': 'string',
'ClusterEnabled': True|False,
'CacheNodeType': 'string',
'AuthTokenEnabled': True|False,
'TransitEncryptionEnabled': True|False,
'AtRestEncryptionEnabled': True|False
}
}
Response Structure
(dict) --
ReplicationGroup (dict) --
Contains all of the attributes of a specific Redis replication group.
ReplicationGroupId (string) --
The identifier for the replication group.
Description (string) --
The user supplied description of the replication group.
Status (string) --
The current state of this replication group - creating , available , modifying , deleting , create-failed , snapshotting .
PendingModifiedValues (dict) --
A group of settings to be applied to the replication group, either immediately or during the next maintenance window.
PrimaryClusterId (string) --
The primary cluster ID that is applied immediately (if --apply-immediately was specified), or during the next maintenance window.
AutomaticFailoverStatus (string) --
Indicates the status of Multi-AZ with automatic failover for this Redis replication group.
Amazon 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.
Resharding (dict) --
The status of an online resharding operation.
SlotMigration (dict) --
Represents the progress of an online resharding operation.
ProgressPercentage (float) --
The percentage of the slot migration that is complete.
MemberClusters (list) --
The names of all the cache clusters that are part of this replication group.
(string) --
NodeGroups (list) --
A list of node groups in this replication group. For Redis (cluster mode disabled) replication groups, this is a single-element list. For Redis (cluster mode enabled) replication groups, the list contains an entry for each node group (shard).
(dict) --
Represents a collection of cache nodes in a replication group. One node in the node group is the read/write primary node. All the other nodes are read-only Replica nodes.
NodeGroupId (string) --
The identifier for the node group (shard). A Redis (cluster mode disabled) replication group contains only 1 node group; therefore, the node group ID is 0001. A Redis (cluster mode enabled) replication group contains 1 to 15 node groups numbered 0001 to 0015.
Status (string) --
The current state of this replication group - creating , available , etc.
PrimaryEndpoint (dict) --
The endpoint of the primary node in this node group (shard).
Address (string) --
The DNS hostname of the cache node.
Port (integer) --
The port number that the cache engine is listening on.
Slots (string) --
The keyspace for this node group (shard).
NodeGroupMembers (list) --
A list containing information about individual nodes within the node group (shard).
(dict) --
Represents a single node within a node group (shard).
CacheClusterId (string) --
The ID of the cluster to which the node belongs.
CacheNodeId (string) --
The ID of the node within its cluster. A node ID is a numeric identifier (0001, 0002, etc.).
ReadEndpoint (dict) --
The information required for client programs to connect to a node for read operations. The read endpoint is only applicable on Redis (cluster mode disabled) clusters.
Address (string) --
The DNS hostname of the cache node.
Port (integer) --
The port number that the cache engine is listening on.
PreferredAvailabilityZone (string) --
The name of the Availability Zone in which the node is located.
CurrentRole (string) --
The role that is currently assigned to the node - primary or replica . This member is only applicable for Redis (cluster mode disabled) replication groups.
SnapshottingClusterId (string) --
The cluster ID that is used as the daily snapshot source for the replication group.
AutomaticFailover (string) --
Indicates the status of Multi-AZ with automatic failover for this Redis replication group.
Amazon 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.
ConfigurationEndpoint (dict) --
The configuration endpoint for this replication group. Use the configuration endpoint to connect to this replication group.
Address (string) --
The DNS hostname of the cache node.
Port (integer) --
The port number that the cache engine is listening on.
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 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 .
ClusterEnabled (boolean) --
A flag indicating whether or not this replication group is cluster enabled; i.e., whether its data can be partitioned across multiple shards (API/CLI: node groups).
Valid values: true | false
CacheNodeType (string) --
The name of the compute and memory capacity node type for each node in the replication group.
AuthTokenEnabled (boolean) --
A flag that enables using an AuthToken (password) when issuing Redis commands.
Default: false
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 or 4.x .
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 encryption at-rest 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 or 4.x .
Default: false
{'Snapshot': {'NodeSnapshots': {'NodeGroupConfiguration': {'NodeGroupId': 'string'}}}}
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.
See also: AWS API Documentation
Request Syntax
client.copy_snapshot(
SourceSnapshotName='string',
TargetSnapshotName='string',
TargetBucket='string'
)
string
[REQUIRED]
The name of an existing snapshot from which to make a copy.
string
[REQUIRED]
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.
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 .
dict
Response Syntax
{
'Snapshot': {
'SnapshotName': 'string',
'ReplicationGroupId': 'string',
'ReplicationGroupDescription': 'string',
'CacheClusterId': 'string',
'SnapshotStatus': 'string',
'SnapshotSource': 'string',
'CacheNodeType': 'string',
'Engine': 'string',
'EngineVersion': 'string',
'NumCacheNodes': 123,
'PreferredAvailabilityZone': 'string',
'CacheClusterCreateTime': datetime(2015, 1, 1),
'PreferredMaintenanceWindow': 'string',
'TopicArn': 'string',
'Port': 123,
'CacheParameterGroupName': 'string',
'CacheSubnetGroupName': 'string',
'VpcId': 'string',
'AutoMinorVersionUpgrade': True|False,
'SnapshotRetentionLimit': 123,
'SnapshotWindow': 'string',
'NumNodeGroups': 123,
'AutomaticFailover': 'enabled'|'disabled'|'enabling'|'disabling',
'NodeSnapshots': [
{
'CacheClusterId': 'string',
'NodeGroupId': 'string',
'CacheNodeId': 'string',
'NodeGroupConfiguration': {
'NodeGroupId': 'string',
'Slots': 'string',
'ReplicaCount': 123,
'PrimaryAvailabilityZone': 'string',
'ReplicaAvailabilityZones': [
'string',
]
},
'CacheSize': 'string',
'CacheNodeCreateTime': datetime(2015, 1, 1),
'SnapshotCreateTime': datetime(2015, 1, 1)
},
]
}
}
Response Structure
(dict) --
Snapshot (dict) --
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: 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 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
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.
For a complete listing of node types and specifications, see:
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 (datetime) --
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 Multi-AZ with automatic failover for the source Redis replication group.
Amazon 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.
NodeSnapshots (list) --
A list of the cache nodes in the source cluster.
(dict) --
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 (dict) --
The configuration for the source node group (shard).
NodeGroupId (string) --
The 4-digit 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 (datetime) --
The date and time when the cache node was created in the source cluster.
SnapshotCreateTime (datetime) --
The date and time when the source node's metadata and cache data set was obtained for the snapshot.
{'NodeGroupConfiguration': {'NodeGroupId': 'string'}}
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 .
Note
This operation is valid for Redis only.
See also: AWS API Documentation
Request Syntax
client.create_replication_group(
ReplicationGroupId='string',
ReplicationGroupDescription='string',
PrimaryClusterId='string',
AutomaticFailoverEnabled=True|False,
NumCacheClusters=123,
PreferredCacheClusterAZs=[
'string',
],
NumNodeGroups=123,
ReplicasPerNodeGroup=123,
NodeGroupConfiguration=[
{
'NodeGroupId': 'string',
'Slots': 'string',
'ReplicaCount': 123,
'PrimaryAvailabilityZone': 'string',
'ReplicaAvailabilityZones': [
'string',
]
},
],
CacheNodeType='string',
Engine='string',
EngineVersion='string',
CacheParameterGroupName='string',
CacheSubnetGroupName='string',
CacheSecurityGroupNames=[
'string',
],
SecurityGroupIds=[
'string',
],
Tags=[
{
'Key': 'string',
'Value': 'string'
},
],
SnapshotArns=[
'string',
],
SnapshotName='string',
PreferredMaintenanceWindow='string',
Port=123,
NotificationTopicArn='string',
AutoMinorVersionUpgrade=True|False,
SnapshotRetentionLimit=123,
SnapshotWindow='string',
AuthToken='string',
TransitEncryptionEnabled=True|False,
AtRestEncryptionEnabled=True|False
)
string
[REQUIRED]
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.
string
[REQUIRED]
A user-created description for the replication group.
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.
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: false
Amazon 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.
integer
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).
list
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.
(string) --
integer
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
integer
An optional parameter that specifies the number of replica nodes in each node group (shard). Valid values are 0 to 5.
list
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.
(dict) --
Node group (shard) configuration options. Each node group (shard) configuration has the following: Slots , PrimaryAvailabilityZone , ReplicaAvailabilityZones , ReplicaCount .
NodeGroupId (string) --
The 4-digit 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) --
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.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 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
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.
For a complete listing of node types and specifications, see:
string
The name of the cache engine to be used for the clusters in this replication group.
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.
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 .
string
The name of the cache subnet group to be used for the replication group.
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 .
list
A list of cache security group names to associate with this replication group.
(string) --
list
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).
(string) --
list
A list of cost allocation tags to be added to this resource. A tag is a key-value pair.
(dict) --
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.
list
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
(string) --
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.
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
integer
The port number on which each member of the replication group accepts connections.
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.
boolean
This parameter is currently disabled.
integer
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).
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.
string
Reserved parameter. The password used to access a password protected server.
AuthToken can be specified only on replication groups where TransitEncryptionEnabled is true .
Warning
For HIPAA compliance, you must specify TransitEncryptionEnabled as true , an AuthToken , and a CacheSubnetGroup .
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 http://redis.io/commands/AUTH.
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.
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: false
Warning
For HIPAA compliance, you must specify TransitEncryptionEnabled as true , an AuthToken , and a CacheSubnetGroup .
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
dict
Response Syntax
{
'ReplicationGroup': {
'ReplicationGroupId': 'string',
'Description': 'string',
'Status': 'string',
'PendingModifiedValues': {
'PrimaryClusterId': 'string',
'AutomaticFailoverStatus': 'enabled'|'disabled',
'Resharding': {
'SlotMigration': {
'ProgressPercentage': 123.0
}
}
},
'MemberClusters': [
'string',
],
'NodeGroups': [
{
'NodeGroupId': 'string',
'Status': 'string',
'PrimaryEndpoint': {
'Address': 'string',
'Port': 123
},
'Slots': 'string',
'NodeGroupMembers': [
{
'CacheClusterId': 'string',
'CacheNodeId': 'string',
'ReadEndpoint': {
'Address': 'string',
'Port': 123
},
'PreferredAvailabilityZone': 'string',
'CurrentRole': 'string'
},
]
},
],
'SnapshottingClusterId': 'string',
'AutomaticFailover': 'enabled'|'disabled'|'enabling'|'disabling',
'ConfigurationEndpoint': {
'Address': 'string',
'Port': 123
},
'SnapshotRetentionLimit': 123,
'SnapshotWindow': 'string',
'ClusterEnabled': True|False,
'CacheNodeType': 'string',
'AuthTokenEnabled': True|False,
'TransitEncryptionEnabled': True|False,
'AtRestEncryptionEnabled': True|False
}
}
Response Structure
(dict) --
ReplicationGroup (dict) --
Contains all of the attributes of a specific Redis replication group.
ReplicationGroupId (string) --
The identifier for the replication group.
Description (string) --
The user supplied description of the replication group.
Status (string) --
The current state of this replication group - creating , available , modifying , deleting , create-failed , snapshotting .
PendingModifiedValues (dict) --
A group of settings to be applied to the replication group, either immediately or during the next maintenance window.
PrimaryClusterId (string) --
The primary cluster ID that is applied immediately (if --apply-immediately was specified), or during the next maintenance window.
AutomaticFailoverStatus (string) --
Indicates the status of Multi-AZ with automatic failover for this Redis replication group.
Amazon 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.
Resharding (dict) --
The status of an online resharding operation.
SlotMigration (dict) --
Represents the progress of an online resharding operation.
ProgressPercentage (float) --
The percentage of the slot migration that is complete.
MemberClusters (list) --
The names of all the cache clusters that are part of this replication group.
(string) --
NodeGroups (list) --
A list of node groups in this replication group. For Redis (cluster mode disabled) replication groups, this is a single-element list. For Redis (cluster mode enabled) replication groups, the list contains an entry for each node group (shard).
(dict) --
Represents a collection of cache nodes in a replication group. One node in the node group is the read/write primary node. All the other nodes are read-only Replica nodes.
NodeGroupId (string) --
The identifier for the node group (shard). A Redis (cluster mode disabled) replication group contains only 1 node group; therefore, the node group ID is 0001. A Redis (cluster mode enabled) replication group contains 1 to 15 node groups numbered 0001 to 0015.
Status (string) --
The current state of this replication group - creating , available , etc.
PrimaryEndpoint (dict) --
The endpoint of the primary node in this node group (shard).
Address (string) --
The DNS hostname of the cache node.
Port (integer) --
The port number that the cache engine is listening on.
Slots (string) --
The keyspace for this node group (shard).
NodeGroupMembers (list) --
A list containing information about individual nodes within the node group (shard).
(dict) --
Represents a single node within a node group (shard).
CacheClusterId (string) --
The ID of the cluster to which the node belongs.
CacheNodeId (string) --
The ID of the node within its cluster. A node ID is a numeric identifier (0001, 0002, etc.).
ReadEndpoint (dict) --
The information required for client programs to connect to a node for read operations. The read endpoint is only applicable on Redis (cluster mode disabled) clusters.
Address (string) --
The DNS hostname of the cache node.
Port (integer) --
The port number that the cache engine is listening on.
PreferredAvailabilityZone (string) --
The name of the Availability Zone in which the node is located.
CurrentRole (string) --
The role that is currently assigned to the node - primary or replica . This member is only applicable for Redis (cluster mode disabled) replication groups.
SnapshottingClusterId (string) --
The cluster ID that is used as the daily snapshot source for the replication group.
AutomaticFailover (string) --
Indicates the status of Multi-AZ with automatic failover for this Redis replication group.
Amazon 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.
ConfigurationEndpoint (dict) --
The configuration endpoint for this replication group. Use the configuration endpoint to connect to this replication group.
Address (string) --
The DNS hostname of the cache node.
Port (integer) --
The port number that the cache engine is listening on.
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 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 .
ClusterEnabled (boolean) --
A flag indicating whether or not this replication group is cluster enabled; i.e., whether its data can be partitioned across multiple shards (API/CLI: node groups).
Valid values: true | false
CacheNodeType (string) --
The name of the compute and memory capacity node type for each node in the replication group.
AuthTokenEnabled (boolean) --
A flag that enables using an AuthToken (password) when issuing Redis commands.
Default: false
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 or 4.x .
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 encryption at-rest 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 or 4.x .
Default: false
{'Snapshot': {'NodeSnapshots': {'NodeGroupConfiguration': {'NodeGroupId': 'string'}}}}
Creates a copy of an entire cluster or replication group at a specific moment in time.
Note
This operation is valid for Redis only.
See also: AWS API Documentation
Request Syntax
client.create_snapshot(
ReplicationGroupId='string',
CacheClusterId='string',
SnapshotName='string'
)
string
The identifier of an existing replication group. The snapshot is created from this replication group.
string
The identifier of an existing cluster. The snapshot is created from this cluster.
string
[REQUIRED]
A name for the snapshot being created.
dict
Response Syntax
{
'Snapshot': {
'SnapshotName': 'string',
'ReplicationGroupId': 'string',
'ReplicationGroupDescription': 'string',
'CacheClusterId': 'string',
'SnapshotStatus': 'string',
'SnapshotSource': 'string',
'CacheNodeType': 'string',
'Engine': 'string',
'EngineVersion': 'string',
'NumCacheNodes': 123,
'PreferredAvailabilityZone': 'string',
'CacheClusterCreateTime': datetime(2015, 1, 1),
'PreferredMaintenanceWindow': 'string',
'TopicArn': 'string',
'Port': 123,
'CacheParameterGroupName': 'string',
'CacheSubnetGroupName': 'string',
'VpcId': 'string',
'AutoMinorVersionUpgrade': True|False,
'SnapshotRetentionLimit': 123,
'SnapshotWindow': 'string',
'NumNodeGroups': 123,
'AutomaticFailover': 'enabled'|'disabled'|'enabling'|'disabling',
'NodeSnapshots': [
{
'CacheClusterId': 'string',
'NodeGroupId': 'string',
'CacheNodeId': 'string',
'NodeGroupConfiguration': {
'NodeGroupId': 'string',
'Slots': 'string',
'ReplicaCount': 123,
'PrimaryAvailabilityZone': 'string',
'ReplicaAvailabilityZones': [
'string',
]
},
'CacheSize': 'string',
'CacheNodeCreateTime': datetime(2015, 1, 1),
'SnapshotCreateTime': datetime(2015, 1, 1)
},
]
}
}
Response Structure
(dict) --
Snapshot (dict) --
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: 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 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
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.
For a complete listing of node types and specifications, see:
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 (datetime) --
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 Multi-AZ with automatic failover for the source Redis replication group.
Amazon 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.
NodeSnapshots (list) --
A list of the cache nodes in the source cluster.
(dict) --
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 (dict) --
The configuration for the source node group (shard).
NodeGroupId (string) --
The 4-digit 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 (datetime) --
The date and time when the cache node was created in the source cluster.
SnapshotCreateTime (datetime) --
The date and time when the source node's metadata and cache data set was obtained for the snapshot.
{'Snapshot': {'NodeSnapshots': {'NodeGroupConfiguration': {'NodeGroupId': 'string'}}}}
Deletes an existing snapshot. When you receive a successful response from this operation, ElastiCache immediately begins deleting the snapshot; you cannot cancel or revert this operation.
Note
This operation is valid for Redis only.
See also: AWS API Documentation
Request Syntax
client.delete_snapshot(
SnapshotName='string'
)
string
[REQUIRED]
The name of the snapshot to be deleted.
dict
Response Syntax
{
'Snapshot': {
'SnapshotName': 'string',
'ReplicationGroupId': 'string',
'ReplicationGroupDescription': 'string',
'CacheClusterId': 'string',
'SnapshotStatus': 'string',
'SnapshotSource': 'string',
'CacheNodeType': 'string',
'Engine': 'string',
'EngineVersion': 'string',
'NumCacheNodes': 123,
'PreferredAvailabilityZone': 'string',
'CacheClusterCreateTime': datetime(2015, 1, 1),
'PreferredMaintenanceWindow': 'string',
'TopicArn': 'string',
'Port': 123,
'CacheParameterGroupName': 'string',
'CacheSubnetGroupName': 'string',
'VpcId': 'string',
'AutoMinorVersionUpgrade': True|False,
'SnapshotRetentionLimit': 123,
'SnapshotWindow': 'string',
'NumNodeGroups': 123,
'AutomaticFailover': 'enabled'|'disabled'|'enabling'|'disabling',
'NodeSnapshots': [
{
'CacheClusterId': 'string',
'NodeGroupId': 'string',
'CacheNodeId': 'string',
'NodeGroupConfiguration': {
'NodeGroupId': 'string',
'Slots': 'string',
'ReplicaCount': 123,
'PrimaryAvailabilityZone': 'string',
'ReplicaAvailabilityZones': [
'string',
]
},
'CacheSize': 'string',
'CacheNodeCreateTime': datetime(2015, 1, 1),
'SnapshotCreateTime': datetime(2015, 1, 1)
},
]
}
}
Response Structure
(dict) --
Snapshot (dict) --
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: 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 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
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.
For a complete listing of node types and specifications, see:
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 (datetime) --
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 Multi-AZ with automatic failover for the source Redis replication group.
Amazon 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.
NodeSnapshots (list) --
A list of the cache nodes in the source cluster.
(dict) --
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 (dict) --
The configuration for the source node group (shard).
NodeGroupId (string) --
The 4-digit 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 (datetime) --
The date and time when the cache node was created in the source cluster.
SnapshotCreateTime (datetime) --
The date and time when the source node's metadata and cache data set was obtained for the snapshot.
{'ReservedCacheNodes': {'ReservationARN': 'string'}}
Returns information about reserved cache nodes for this account, or about a specified reserved cache node.
See also: AWS API Documentation
Request Syntax
client.describe_reserved_cache_nodes(
ReservedCacheNodeId='string',
ReservedCacheNodesOfferingId='string',
CacheNodeType='string',
Duration='string',
ProductDescription='string',
OfferingType='string',
MaxRecords=123,
Marker='string'
)
string
The reserved cache node identifier filter value. Use this parameter to show only the reservation that matches the specified reservation ID.
string
The offering identifier filter value. Use this parameter to show only purchased reservations matching the specified offering identifier.
string
The cache node type filter value. Use this parameter to show only those reservations matching the specified cache node type.
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 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
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.
For a complete listing of node types and specifications, see:
string
The duration filter value, specified in years or seconds. Use this parameter to show only reservations for this duration.
Valid Values: 1 | 3 | 31536000 | 94608000
string
The product description filter value. Use this parameter to show only those reservations matching the specified product description.
string
The offering type filter value. Use this parameter to show only the available offerings matching the specified offering type.
Valid values: "Light Utilization"|"Medium Utilization"|"Heavy Utilization"
integer
The maximum number of records to include in the response. If more records exist than the specified MaxRecords value, a marker is included in the response so that the remaining results can be retrieved.
Default: 100
Constraints: minimum 20; maximum 100.
string
An optional marker returned from a prior request. Use this marker for pagination of results from this operation. If this parameter is specified, the response includes only records beyond the marker, up to the value specified by MaxRecords .
dict
Response Syntax
{
'Marker': 'string',
'ReservedCacheNodes': [
{
'ReservedCacheNodeId': 'string',
'ReservedCacheNodesOfferingId': 'string',
'CacheNodeType': 'string',
'StartTime': datetime(2015, 1, 1),
'Duration': 123,
'FixedPrice': 123.0,
'UsagePrice': 123.0,
'CacheNodeCount': 123,
'ProductDescription': 'string',
'OfferingType': 'string',
'State': 'string',
'RecurringCharges': [
{
'RecurringChargeAmount': 123.0,
'RecurringChargeFrequency': 'string'
},
],
'ReservationARN': 'string'
},
]
}
Response Structure
(dict) --
Represents the output of a DescribeReservedCacheNodes operation.
Marker (string) --
Provides an identifier to allow retrieval of paginated results.
ReservedCacheNodes (list) --
A list of reserved cache nodes. Each element in the list contains detailed information about one node.
(dict) --
Represents the output of a PurchaseReservedCacheNodesOffering operation.
ReservedCacheNodeId (string) --
The unique identifier for the reservation.
ReservedCacheNodesOfferingId (string) --
The offering identifier.
CacheNodeType (string) --
The cache node type for the reserved cache nodes.
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 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
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.
For a complete listing of node types and specifications, see:
StartTime (datetime) --
The time the reservation started.
Duration (integer) --
The duration of the reservation in seconds.
FixedPrice (float) --
The fixed price charged for this reserved cache node.
UsagePrice (float) --
The hourly price charged for this reserved cache node.
CacheNodeCount (integer) --
The number of cache nodes that have been reserved.
ProductDescription (string) --
The description of the reserved cache node.
OfferingType (string) --
The offering type of this reserved cache node.
State (string) --
The state of the reserved cache node.
RecurringCharges (list) --
The recurring price charged to run this reserved cache node.
(dict) --
Contains the specific price and frequency of a recurring charges for a reserved cache node, or for a reserved cache node offering.
RecurringChargeAmount (float) --
The monetary amount of the recurring charge.
RecurringChargeFrequency (string) --
The frequency of the recurring charge.
ReservationARN (string) --
The Amazon Resource Name (ARN) of the reserved cache node.
Example: arn:aws:elasticache:us-east-1:123456789012:reserved-instance:ri-2017-03-27-08-33-25-582
{'Snapshots': {'NodeSnapshots': {'NodeGroupConfiguration': {'NodeGroupId': 'string'}}}}
Returns information about cluster or replication group snapshots. By default, DescribeSnapshots lists all of your snapshots; it can optionally describe a single snapshot, or just the snapshots associated with a particular cache cluster.
Note
This operation is valid for Redis only.
See also: AWS API Documentation
Request Syntax
client.describe_snapshots(
ReplicationGroupId='string',
CacheClusterId='string',
SnapshotName='string',
SnapshotSource='string',
Marker='string',
MaxRecords=123,
ShowNodeGroupConfig=True|False
)
string
A user-supplied replication group identifier. If this parameter is specified, only snapshots associated with that specific replication group are described.
string
A user-supplied cluster identifier. If this parameter is specified, only snapshots associated with that specific cluster are described.
string
A user-supplied name of the snapshot. If this parameter is specified, only this snapshot are described.
string
If set to system , the output shows snapshots that were automatically created by ElastiCache. If set to user the output shows snapshots that were manually created. If omitted, the output shows both automatically and manually created snapshots.
string
An optional marker returned from a prior request. Use this marker for pagination of results from this operation. If this parameter is specified, the response includes only records beyond the marker, up to the value specified by MaxRecords .
integer
The maximum number of records to include in the response. If more records exist than the specified MaxRecords value, a marker is included in the response so that the remaining results can be retrieved.
Default: 50
Constraints: minimum 20; maximum 50.
boolean
A Boolean value which if true, the node group (shard) configuration is included in the snapshot description.
dict
Response Syntax
{
'Marker': 'string',
'Snapshots': [
{
'SnapshotName': 'string',
'ReplicationGroupId': 'string',
'ReplicationGroupDescription': 'string',
'CacheClusterId': 'string',
'SnapshotStatus': 'string',
'SnapshotSource': 'string',
'CacheNodeType': 'string',
'Engine': 'string',
'EngineVersion': 'string',
'NumCacheNodes': 123,
'PreferredAvailabilityZone': 'string',
'CacheClusterCreateTime': datetime(2015, 1, 1),
'PreferredMaintenanceWindow': 'string',
'TopicArn': 'string',
'Port': 123,
'CacheParameterGroupName': 'string',
'CacheSubnetGroupName': 'string',
'VpcId': 'string',
'AutoMinorVersionUpgrade': True|False,
'SnapshotRetentionLimit': 123,
'SnapshotWindow': 'string',
'NumNodeGroups': 123,
'AutomaticFailover': 'enabled'|'disabled'|'enabling'|'disabling',
'NodeSnapshots': [
{
'CacheClusterId': 'string',
'NodeGroupId': 'string',
'CacheNodeId': 'string',
'NodeGroupConfiguration': {
'NodeGroupId': 'string',
'Slots': 'string',
'ReplicaCount': 123,
'PrimaryAvailabilityZone': 'string',
'ReplicaAvailabilityZones': [
'string',
]
},
'CacheSize': 'string',
'CacheNodeCreateTime': datetime(2015, 1, 1),
'SnapshotCreateTime': datetime(2015, 1, 1)
},
]
},
]
}
Response Structure
(dict) --
Represents the output of a DescribeSnapshots operation.
Marker (string) --
An optional marker returned from a prior request. Use this marker for pagination of results from this operation. If this parameter is specified, the response includes only records beyond the marker, up to the value specified by MaxRecords .
Snapshots (list) --
A list of snapshots. Each item in the list contains detailed information about one snapshot.
(dict) --
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: 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 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
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.
For a complete listing of node types and specifications, see:
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 (datetime) --
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 Multi-AZ with automatic failover for the source Redis replication group.
Amazon 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.
NodeSnapshots (list) --
A list of the cache nodes in the source cluster.
(dict) --
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 (dict) --
The configuration for the source node group (shard).
NodeGroupId (string) --
The 4-digit 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 (datetime) --
The date and time when the cache node was created in the source cluster.
SnapshotCreateTime (datetime) --
The date and time when the source node's metadata and cache data set was obtained for the snapshot.
{'NodeGroupsToRetain': ['string'],
'ReshardingConfiguration': {'NodeGroupId': 'string'}}
Modifies a replication group's shards (node groups) by allowing you to add shards, remove shards, or rebalance the keyspaces among exisiting shards.
See also: AWS API Documentation
Request Syntax
client.modify_replication_group_shard_configuration(
ReplicationGroupId='string',
NodeGroupCount=123,
ApplyImmediately=True|False,
ReshardingConfiguration=[
{
'NodeGroupId': 'string',
'PreferredAvailabilityZones': [
'string',
]
},
],
NodeGroupsToRemove=[
'string',
],
NodeGroupsToRetain=[
'string',
]
)
string
[REQUIRED]
The name of the Redis (cluster mode enabled) cluster (replication group) on which the shards are to be configured.
integer
[REQUIRED]
The number of node groups (shards) that results from the modification of the shard configuration.
boolean
[REQUIRED]
Indicates that the shard reconfiguration process begins immediately. At present, the only permitted value for this parameter is true .
Value: true
list
Specifies the preferred availability zones for each node group in the cluster. If the value of NodeGroupCount is greater than the current number of node groups (shards), you can use this parameter to specify the preferred availability zones of the cluster's shards. If you omit this parameter ElastiCache selects availability zones for you.
You can specify this parameter only if the value of NodeGroupCount is greater than the current number of node groups (shards).
(dict) --
A list of PreferredAvailabilityZones objects that specifies the configuration of a node group in the resharded cluster.
NodeGroupId (string) --
The 4-digit id for the node group these configuration values apply to.
PreferredAvailabilityZones (list) --
A list of preferred availability zones for the nodes in this cluster.
(string) --
list
If the value of NodeGroupCount is less than the current number of node groups (shards), the NodeGroupsToRemove or NodeGroupsToRetain is a required list of node group ids to remove from or retain in the cluster.
ElastiCache for Redis will attempt to remove all node groups listed by NodeGroupsToRemove from the cluster.
(string) --
list
If the value of NodeGroupCount is less than the current number of node groups (shards), the NodeGroupsToRemove or NodeGroupsToRetain is a required list of node group ids to remove from or retain in the cluster.
ElastiCache for Redis will attempt to remove all node groups except those listed by NodeGroupsToRetain from the cluster.
(string) --
dict
Response Syntax
{
'ReplicationGroup': {
'ReplicationGroupId': 'string',
'Description': 'string',
'Status': 'string',
'PendingModifiedValues': {
'PrimaryClusterId': 'string',
'AutomaticFailoverStatus': 'enabled'|'disabled',
'Resharding': {
'SlotMigration': {
'ProgressPercentage': 123.0
}
}
},
'MemberClusters': [
'string',
],
'NodeGroups': [
{
'NodeGroupId': 'string',
'Status': 'string',
'PrimaryEndpoint': {
'Address': 'string',
'Port': 123
},
'Slots': 'string',
'NodeGroupMembers': [
{
'CacheClusterId': 'string',
'CacheNodeId': 'string',
'ReadEndpoint': {
'Address': 'string',
'Port': 123
},
'PreferredAvailabilityZone': 'string',
'CurrentRole': 'string'
},
]
},
],
'SnapshottingClusterId': 'string',
'AutomaticFailover': 'enabled'|'disabled'|'enabling'|'disabling',
'ConfigurationEndpoint': {
'Address': 'string',
'Port': 123
},
'SnapshotRetentionLimit': 123,
'SnapshotWindow': 'string',
'ClusterEnabled': True|False,
'CacheNodeType': 'string',
'AuthTokenEnabled': True|False,
'TransitEncryptionEnabled': True|False,
'AtRestEncryptionEnabled': True|False
}
}
Response Structure
(dict) --
ReplicationGroup (dict) --
Contains all of the attributes of a specific Redis replication group.
ReplicationGroupId (string) --
The identifier for the replication group.
Description (string) --
The user supplied description of the replication group.
Status (string) --
The current state of this replication group - creating , available , modifying , deleting , create-failed , snapshotting .
PendingModifiedValues (dict) --
A group of settings to be applied to the replication group, either immediately or during the next maintenance window.
PrimaryClusterId (string) --
The primary cluster ID that is applied immediately (if --apply-immediately was specified), or during the next maintenance window.
AutomaticFailoverStatus (string) --
Indicates the status of Multi-AZ with automatic failover for this Redis replication group.
Amazon 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.
Resharding (dict) --
The status of an online resharding operation.
SlotMigration (dict) --
Represents the progress of an online resharding operation.
ProgressPercentage (float) --
The percentage of the slot migration that is complete.
MemberClusters (list) --
The names of all the cache clusters that are part of this replication group.
(string) --
NodeGroups (list) --
A list of node groups in this replication group. For Redis (cluster mode disabled) replication groups, this is a single-element list. For Redis (cluster mode enabled) replication groups, the list contains an entry for each node group (shard).
(dict) --
Represents a collection of cache nodes in a replication group. One node in the node group is the read/write primary node. All the other nodes are read-only Replica nodes.
NodeGroupId (string) --
The identifier for the node group (shard). A Redis (cluster mode disabled) replication group contains only 1 node group; therefore, the node group ID is 0001. A Redis (cluster mode enabled) replication group contains 1 to 15 node groups numbered 0001 to 0015.
Status (string) --
The current state of this replication group - creating , available , etc.
PrimaryEndpoint (dict) --
The endpoint of the primary node in this node group (shard).
Address (string) --
The DNS hostname of the cache node.
Port (integer) --
The port number that the cache engine is listening on.
Slots (string) --
The keyspace for this node group (shard).
NodeGroupMembers (list) --
A list containing information about individual nodes within the node group (shard).
(dict) --
Represents a single node within a node group (shard).
CacheClusterId (string) --
The ID of the cluster to which the node belongs.
CacheNodeId (string) --
The ID of the node within its cluster. A node ID is a numeric identifier (0001, 0002, etc.).
ReadEndpoint (dict) --
The information required for client programs to connect to a node for read operations. The read endpoint is only applicable on Redis (cluster mode disabled) clusters.
Address (string) --
The DNS hostname of the cache node.
Port (integer) --
The port number that the cache engine is listening on.
PreferredAvailabilityZone (string) --
The name of the Availability Zone in which the node is located.
CurrentRole (string) --
The role that is currently assigned to the node - primary or replica . This member is only applicable for Redis (cluster mode disabled) replication groups.
SnapshottingClusterId (string) --
The cluster ID that is used as the daily snapshot source for the replication group.
AutomaticFailover (string) --
Indicates the status of Multi-AZ with automatic failover for this Redis replication group.
Amazon 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.
ConfigurationEndpoint (dict) --
The configuration endpoint for this replication group. Use the configuration endpoint to connect to this replication group.
Address (string) --
The DNS hostname of the cache node.
Port (integer) --
The port number that the cache engine is listening on.
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 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 .
ClusterEnabled (boolean) --
A flag indicating whether or not this replication group is cluster enabled; i.e., whether its data can be partitioned across multiple shards (API/CLI: node groups).
Valid values: true | false
CacheNodeType (string) --
The name of the compute and memory capacity node type for each node in the replication group.
AuthTokenEnabled (boolean) --
A flag that enables using an AuthToken (password) when issuing Redis commands.
Default: false
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 or 4.x .
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 encryption at-rest 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 or 4.x .
Default: false
{'ReservedCacheNode': {'ReservationARN': 'string'}}
Allows you to purchase a reserved cache node offering.
See also: AWS API Documentation
Request Syntax
client.purchase_reserved_cache_nodes_offering(
ReservedCacheNodesOfferingId='string',
ReservedCacheNodeId='string',
CacheNodeCount=123
)
string
[REQUIRED]
The ID of the reserved cache node offering to purchase.
Example: 438012d3-4052-4cc7-b2e3-8d3372e0e706
string
A customer-specified identifier to track this reservation.
Note
The Reserved Cache Node ID is an unique customer-specified identifier to track this reservation. If this parameter is not specified, ElastiCache automatically generates an identifier for the reservation.
Example: myreservationID
integer
The number of cache node instances to reserve.
Default: 1
dict
Response Syntax
{
'ReservedCacheNode': {
'ReservedCacheNodeId': 'string',
'ReservedCacheNodesOfferingId': 'string',
'CacheNodeType': 'string',
'StartTime': datetime(2015, 1, 1),
'Duration': 123,
'FixedPrice': 123.0,
'UsagePrice': 123.0,
'CacheNodeCount': 123,
'ProductDescription': 'string',
'OfferingType': 'string',
'State': 'string',
'RecurringCharges': [
{
'RecurringChargeAmount': 123.0,
'RecurringChargeFrequency': 'string'
},
],
'ReservationARN': 'string'
}
}
Response Structure
(dict) --
ReservedCacheNode (dict) --
Represents the output of a PurchaseReservedCacheNodesOffering operation.
ReservedCacheNodeId (string) --
The unique identifier for the reservation.
ReservedCacheNodesOfferingId (string) --
The offering identifier.
CacheNodeType (string) --
The cache node type for the reserved cache nodes.
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 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
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.
For a complete listing of node types and specifications, see:
StartTime (datetime) --
The time the reservation started.
Duration (integer) --
The duration of the reservation in seconds.
FixedPrice (float) --
The fixed price charged for this reserved cache node.
UsagePrice (float) --
The hourly price charged for this reserved cache node.
CacheNodeCount (integer) --
The number of cache nodes that have been reserved.
ProductDescription (string) --
The description of the reserved cache node.
OfferingType (string) --
The offering type of this reserved cache node.
State (string) --
The state of the reserved cache node.
RecurringCharges (list) --
The recurring price charged to run this reserved cache node.
(dict) --
Contains the specific price and frequency of a recurring charges for a reserved cache node, or for a reserved cache node offering.
RecurringChargeAmount (float) --
The monetary amount of the recurring charge.
RecurringChargeFrequency (string) --
The frequency of the recurring charge.
ReservationARN (string) --
The Amazon Resource Name (ARN) of the reserved cache node.
Example: arn:aws:elasticache:us-east-1:123456789012:reserved-instance:ri-2017-03-27-08-33-25-582