2017/11/08 - Amazon ElastiCache - 1 new 5 updated api methods
Changes This release adds online resharding for ElastiCache for Redis offering, providing the ability to add and remove shards from a running cluster. Developers can now dynamically scale-out or scale-in their Redis cluster workloads to adapt to changes in demand. ElastiCache will resize the cluster by adding or removing shards and redistribute hash slots uniformly across the new shard configuration, all while the cluster continues to stay online and serves requests.
Performs horizontal scaling on a Redis (cluster mode enabled) cluster with no downtime. Requires Redis engine version 3.2.10 or newer. For information on upgrading your engine to a newer version, see Upgrading Engine Versions in the Amazon ElastiCache User Guide.
For more information on ElastiCache for Redis online horizontal scaling, see ElastiCache for Redis Horizontal Scaling
See also: AWS API Documentation
Request Syntax
client.modify_replication_group_shard_configuration(
ReplicationGroupId='string',
NodeGroupCount=123,
ApplyImmediately=True|False,
ReshardingConfiguration=[
{
'PreferredAvailabilityZones': [
'string',
]
},
],
NodeGroupsToRemove=[
'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.
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), NodeGroupsToRemove is a required list of node group ids to remove 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 identifiers of all the nodes 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) --
Represents the information required for client programs to connect to a cache node.
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 .
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.
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.
Default: false
{'ReplicationGroup': {'PendingModifiedValues': {'Resharding': {'SlotMigration': {'ProgressPercentage': 'double'}}}}}
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=[
{
'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 (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: Slots, PrimaryAvailabilityZone, ReplicaAvailabilityZones, ReplicaCount.
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.
(dict) --
Node group (shard) configuration options. Each node group (shard) configuration has the following: Slots , PrimaryAvailabilityZone , ReplicaAvailabilityZones , ReplicaCount .
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
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 Amazon ElastiCache Product Features and Details and either Cache Node Type-Specific Parameters for Memcached or Cache Node Type-Specific Parameters for Redis .
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. A tag key does not have to be accompanied by a tag value.
(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.
This parameter is valid only if:
The parameter TransitEncryptionEnabled was set to true when the cluster was created.
The line requirepass was added to the database configuration file.
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 3.2.4 or later, and the cluster is being created in an Amazon VPC.
If you enable in-transit encryption, you must also specify a value for CacheSubnetGroup .
Default: false
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.
Note
This parameter is valid only if the Engine parameter is redis and the cluster is being created in an Amazon VPC.
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 identifiers of all the nodes 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) --
Represents the information required for client programs to connect to a cache node.
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 .
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.
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.
Default: false
{'ReplicationGroup': {'PendingModifiedValues': {'Resharding': {'SlotMigration': {'ProgressPercentage': 'double'}}}}}
Deletes an existing replication group. By default, this operation deletes the entire replication group, including the primary/primaries and all of the read replicas. If the replication group has only one primary, you can optionally delete only the read replicas, while retaining the primary by setting RetainPrimaryCluster=true .
When you receive a successful response from this operation, Amazon ElastiCache immediately begins deleting the selected resources; you cannot cancel or revert this operation.
Note
This operation is valid for Redis only.
See also: AWS API Documentation
Request Syntax
client.delete_replication_group(
ReplicationGroupId='string',
RetainPrimaryCluster=True|False,
FinalSnapshotIdentifier='string'
)
string
[REQUIRED]
The identifier for the cluster to be deleted. This parameter is not case sensitive.
boolean
If set to true , all of the read replicas are deleted, but the primary node is retained.
string
The name of a final node group (shard) snapshot. ElastiCache creates the snapshot from the primary node in the cluster, rather than one of the replicas; this is to ensure that it captures the freshest data. After the final snapshot is taken, the replication group is immediately deleted.
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 identifiers of all the nodes 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) --
Represents the information required for client programs to connect to a cache node.
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 .
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.
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.
Default: false
{'ReplicationGroups': {'PendingModifiedValues': {'Resharding': {'SlotMigration': {'ProgressPercentage': 'double'}}}}}
Returns information about a particular replication group. If no identifier is specified, DescribeReplicationGroups returns information about all replication groups.
Note
This operation is valid for Redis only.
See also: AWS API Documentation
Request Syntax
client.describe_replication_groups(
ReplicationGroupId='string',
MaxRecords=123,
Marker='string'
)
string
The identifier for the replication group to be described. This parameter is not case sensitive.
If you do not specify this parameter, information about all replication groups is returned.
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',
'ReplicationGroups': [
{
'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) --
Represents the output of a DescribeReplicationGroups operation.
Marker (string) --
Provides an identifier to allow retrieval of paginated results.
ReplicationGroups (list) --
A list of replication groups. Each item in the list contains detailed information about one replication group.
(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 identifiers of all the nodes 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) --
Represents the information required for client programs to connect to a cache node.
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 .
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.
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.
Default: false
{'ReplicationGroup': {'PendingModifiedValues': {'Resharding': {'SlotMigration': {'ProgressPercentage': 'double'}}}}}
Modifies the settings for a replication group.
Warning
Due to current limitations on Redis (cluster mode disabled), this operation or parameter is not supported on Redis (cluster mode enabled) replication groups.
Note
This operation is valid for Redis only.
See also: AWS API Documentation
Request Syntax
client.modify_replication_group(
ReplicationGroupId='string',
ReplicationGroupDescription='string',
PrimaryClusterId='string',
SnapshottingClusterId='string',
AutomaticFailoverEnabled=True|False,
CacheSecurityGroupNames=[
'string',
],
SecurityGroupIds=[
'string',
],
PreferredMaintenanceWindow='string',
NotificationTopicArn='string',
CacheParameterGroupName='string',
NotificationTopicStatus='string',
ApplyImmediately=True|False,
EngineVersion='string',
AutoMinorVersionUpgrade=True|False,
SnapshotRetentionLimit=123,
SnapshotWindow='string',
CacheNodeType='string',
NodeGroupId='string'
)
string
[REQUIRED]
The identifier of the replication group to modify.
string
A description for the replication group. Maximum length is 255 characters.
string
For replication groups with a single primary, if this parameter is specified, ElastiCache promotes the specified cluster in the specified replication group to the primary role. The nodes of all other clusters in the replication group are read replicas.
string
The cluster ID that is used as the daily snapshot source for the replication group. This parameter cannot be set for Redis (cluster mode enabled) replication groups.
boolean
Determines whether a read replica is automatically promoted to read/write primary if the existing primary encounters a failure.
Valid values: true | 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.
list
A list of cache security group names to authorize for the clusters in this replication group. This change is asynchronously applied as soon as possible.
This parameter can be used only with replication group containing clusters running outside of an Amazon Virtual Private Cloud (Amazon VPC).
Constraints: Must contain no more than 255 alphanumeric characters. Must not be Default .
(string) --
list
Specifies the VPC Security Groups associated with the clusters in the replication group.
This parameter can be used only with replication group containing clusters running in an Amazon Virtual Private Cloud (Amazon VPC).
(string) --
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
string
The Amazon Resource Name (ARN) of the Amazon SNS topic to which notifications are sent.
Note
The Amazon SNS topic owner must be same as the replication group owner.
string
The name of the cache parameter group to apply to all of the clusters in this replication group. This change is asynchronously applied as soon as possible for parameters when the ApplyImmediately parameter is specified as true for this request.
string
The status of the Amazon SNS notification topic for the replication group. Notifications are sent only if the status is active .
Valid values: active | inactive
boolean
If true , this parameter causes the modifications in this request and any pending modifications to be applied, asynchronously and as soon as possible, regardless of the PreferredMaintenanceWindow setting for the replication group.
If false , changes to the nodes in the replication group are applied on the next maintenance reboot, or the next failure reboot, whichever occurs first.
Valid values: true | false
Default: false
string
The upgraded version of the cache engine to be run on the clusters in the replication group.
Important: You can upgrade to a newer engine version (see Selecting a Cache Engine and Version ), but you cannot downgrade to an earlier engine version. If you want to use an earlier engine version, you must delete the existing replication group and create it anew with the earlier engine version.
boolean
This parameter is currently disabled.
integer
The number of days for which ElastiCache retains automatic node group (shard) 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.
Important If the value of SnapshotRetentionLimit is set to zero (0), backups are turned off.
string
The daily time range (in UTC) during which ElastiCache begins taking a daily snapshot of the node group (shard) specified by SnapshottingClusterId .
Example: 05:00-09:00
If you do not specify this parameter, ElastiCache automatically chooses an appropriate time range.
string
A valid cache node type that you want to scale this replication group to.
string
The name of the Node Group (called shard in the console).
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 identifiers of all the nodes 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) --
Represents the information required for client programs to connect to a cache node.
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 .
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.
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.
Default: false
{'ReplicationGroup': {'PendingModifiedValues': {'Resharding': {'SlotMigration': {'ProgressPercentage': 'double'}}}}}
Represents the input of a TestFailover operation which test automatic failover on a specified node group (called shard in the console) in a replication group (called cluster in the console).
Note the following
A customer can use this operation to test automatic failover on up to 5 shards (called node groups in the ElastiCache API and AWS CLI) in any rolling 24-hour period.
If calling this operation on shards in different clusters (called replication groups in the API and CLI), the calls can be made concurrently.
If calling this operation multiple times on different shards in the same Redis (cluster mode enabled) replication group, the first node replacement must complete before a subsequent call can be made.
To determine whether the node replacement is complete you can check Events using the Amazon ElastiCache console, the AWS CLI, or the ElastiCache API. Look for the following automatic failover related events, listed here in order of occurrance:
Replication group message: Test Failover API called for node group <node-group-id>
Cache cluster message: Failover from master node <primary-node-id> to replica node <node-id> completed
Replication group message: Failover from master node <primary-node-id> to replica node <node-id> completed
Cache cluster message: Recovering cache nodes <node-id>
Cache cluster message: Finished recovery for cache nodes <node-id>
For more information see:
Viewing ElastiCache Events in the ElastiCache User Guide
DescribeEvents in the ElastiCache API Reference
Also see, Testing Multi-AZ with Automatic Failover in the ElastiCache User Guide .
See also: AWS API Documentation
Request Syntax
client.test_failover(
ReplicationGroupId='string',
NodeGroupId='string'
)
string
[REQUIRED]
The name of the replication group (console: cluster) whose automatic failover is being tested by this operation.
string
[REQUIRED]
The name of the node group (called shard in the console) in this replication group on which automatic failover is to be tested. You may test automatic failover on up to 5 node groups in any rolling 24-hour period.
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 identifiers of all the nodes 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) --
Represents the information required for client programs to connect to a cache node.
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 .
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.
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.
Default: false