[ aws . memorydb ]

failover-shard

Description

Used to failover a shard. This API is designed for testing the behavior of your application in case of MemoryDB failover. It is not designed to be used as a production-level tool for initiating a failover to overcome a problem you may have with the cluster. Moreover, in certain conditions such as large scale operational events, Amazon may block this API.

See also: AWS API Documentation

Synopsis

  failover-shard
--cluster-name <value>
--shard-name <value>
[--cli-input-json | --cli-input-yaml]
[--generate-cli-skeleton <value>]
[--debug]
[--endpoint-url <value>]
[--no-verify-ssl]
[--no-paginate]
[--output <value>]
[--query <value>]
[--profile <value>]
[--region <value>]
[--version <value>]
[--color <value>]
[--no-sign-request]
[--ca-bundle <value>]
[--cli-read-timeout <value>]
[--cli-connect-timeout <value>]
[--cli-binary-format <value>]
[--no-cli-pager]
[--cli-auto-prompt]
[--no-cli-auto-prompt]

Options

--cluster-name (string)

The cluster being failed over

--shard-name (string)

The name of the shard

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

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. Similarly, if provided yaml-input it will print a sample input YAML that can be used with --cli-input-yaml. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command. The generated JSON skeleton is not stable between versions of the AWS CLI and there are no backwards compatibility guarantees in the JSON skeleton generated.

Global Options

--debug (boolean)

Turn on debug logging.

--endpoint-url (string)

Override command’s default URL with the given URL.

--no-verify-ssl (boolean)

By default, the AWS CLI uses SSL when communicating with AWS services. For each SSL connection, the AWS CLI will verify SSL certificates. This option overrides the default behavior of verifying SSL certificates.

--no-paginate (boolean)

Disable automatic pagination. If automatic pagination is disabled, the AWS CLI will only make one call, for the first page of results.

--output (string)

The formatting style for command output.

• json
• text
• table
• yaml
• yaml-stream

--query (string)

A JMESPath query to use in filtering the response data.

--profile (string)

Use a specific profile from your credential file.

--region (string)

The region to use. Overrides config/env settings.

--version (string)

Display the version of this tool.

--color (string)

Turn on/off color output.

• on
• off
• auto

--no-sign-request (boolean)

Do not sign requests. Credentials will not be loaded if this argument is provided.

--ca-bundle (string)

The CA certificate bundle to use when verifying SSL certificates. Overrides config/env settings.

--cli-read-timeout (int)

The maximum socket read time in seconds. If the value is set to 0, the socket read will be blocking and not timeout. The default value is 60 seconds.

--cli-connect-timeout (int)

The maximum socket connect time in seconds. If the value is set to 0, the socket connect will be blocking and not timeout. The default value is 60 seconds.

--cli-binary-format (string)

The formatting style to be used for binary blobs. The default format is base64. The base64 format expects binary blobs to be provided as a base64 encoded string. The raw-in-base64-out format preserves compatibility with AWS CLI V1 behavior and binary values must be passed literally. When providing contents from a file that map to a binary blob fileb:// will always be treated as binary and use the file contents directly regardless of the cli-binary-format setting. When using file:// the file contents will need to properly formatted for the configured cli-binary-format.

• base64
• raw-in-base64-out

--no-cli-pager (boolean)

Disable cli pager for output.

--cli-auto-prompt (boolean)

Automatically prompt for CLI input parameters.

--no-cli-auto-prompt (boolean)

Disable automatically prompt for CLI input parameters.

Examples

Note

To use the following examples, you must have the AWS CLI installed and configured. See the Getting started guide in the AWS CLI User Guide for more information.

Unless otherwise stated, all examples have unix-like quotation rules. These examples will need to be adapted to your terminal’s quoting rules. See Using quotation marks with strings in the AWS CLI User Guide .

To fail over a shard

The following failover-shard` fails over a shard.

aws memorydb failover-shard \
    --cluster-name my-cluster --shard-name 0001

Output:

{
    "Cluster": {
        "Name": "my-cluster",
        "Status": "available",
        "NumberOfShards": 2,
        "ClusterEndpoint": {
            "Address": "clustercfg.my-cluster.xxxxxx.memorydb.us-east-1.amazonaws.com",
            "Port": 6379
        },
        "NodeType": "db.r6g.large",
        "EngineVersion": "6.2",
        "EnginePatchVersion": "6.2.6",
        "ParameterGroupName": "default.memorydb-redis6",
        "ParameterGroupStatus": "in-sync",
        "SecurityGroups": [
            {
                "SecurityGroupId": "sg-0a143xxxx45c9fae",
                "Status": "active"
            }
        ],
        "SubnetGroupName": "my-sg",
        "TLSEnabled": true,
        "ARN": "arn:aws:memorydb:us-east-1:491658xxxxxx:cluster/my-cluster",
        "SnapshotRetentionLimit": 0,
        "MaintenanceWindow": "wed:03:00-wed:04:00",
        "SnapshotWindow": "04:30-05:30",
        "AutoMinorVersionUpgrade": true
    }
}

For more information, see Minimizing downtime with MultiAZ in the MemoryDB User Guide.

Output

Cluster -> (structure)

The cluster being failed over

Name -> (string)

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

Description -> (string)

A description of the cluster

Status -> (string)

The status of the cluster. For example, Available, Updating, Creating.

PendingUpdates -> (structure)

A group of settings that are currently being applied.

Resharding -> (structure)

The status of an online resharding operation.

SlotMigration -> (structure)

The status of the online resharding slot migration

ProgressPercentage -> (double)

The percentage of the slot migration that is complete.

ACLs -> (structure)

A list of ACLs associated with the cluster that are being updated

ACLToApply -> (string)

A list of ACLs pending to be applied.

ServiceUpdates -> (list)

A list of service updates being applied to the cluster

(structure)

Update action that has yet to be processed for the corresponding apply/stop request

ServiceUpdateName -> (string)

The unique ID of the service update

Status -> (string)

The status of the service update

NumberOfShards -> (integer)

The number of shards in the cluster

Shards -> (list)

A list of shards that are members of the cluster.

(structure)

Represents a collection of nodes in a cluster. One node in the node group is the read/write primary node. All the other nodes are read-only Replica nodes.

Name -> (string)

The name of the shard

Status -> (string)

The current state of this replication group - creating, available, modifying, deleting.

Slots -> (string)

The keyspace for this shard.

Nodes -> (list)

A list containing information about individual nodes within the shard

(structure)

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

Name -> (string)

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

Status -> (string)

The status of the service update on the node

AvailabilityZone -> (string)

The Availability Zone in which the node resides

CreateTime -> (timestamp)

The date and time when the node was created.

Endpoint -> (structure)

The hostname for connecting to this node.

Address -> (string)

The DNS hostname of the node.

Port -> (integer)

The port number that the engine is listening on.

NumberOfNodes -> (integer)

The number of nodes in the shard

AvailabilityMode -> (string)

Indicates if the cluster has a Multi-AZ configuration (multiaz) or not (singleaz).

ClusterEndpoint -> (structure)

The cluster’s configuration endpoint

Address -> (string)

The DNS hostname of the node.

Port -> (integer)

The port number that the engine is listening on.

NodeType -> (string)

The cluster’s node type

Engine -> (string)

The Redis OSS or Valkey engine used by the cluster.

EngineVersion -> (string)

The Redis engine version used by the cluster

EnginePatchVersion -> (string)

The engine patch version used by the cluster

ParameterGroupName -> (string)

The name of the parameter group used by the cluster

ParameterGroupStatus -> (string)

The status of the parameter group used by the cluster, for example ‘active’ or ‘applying’.

SecurityGroups -> (list)

A list of security groups used by the cluster

(structure)

Represents a single security group and its status.

SecurityGroupId -> (string)

The identifier of the security group.

Status -> (string)

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

SubnetGroupName -> (string)

The name of the subnet group used by the cluster

TLSEnabled -> (boolean)

A flag to indicate if In-transit encryption is enabled

KmsKeyId -> (string)

The ID of the KMS key used to encrypt the cluster

ARN -> (string)

The Amazon Resource Name (ARN) of the cluster.

SnsTopicArn -> (string)

The Amazon Resource Name (ARN) of the SNS notification topic

SnsTopicStatus -> (string)

The SNS topic must be in Active status to receive notifications

SnapshotRetentionLimit -> (integer)

The number of days for which MemoryDB 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.

MaintenanceWindow -> (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.

SnapshotWindow -> (string)

The daily time range (in UTC) during which MemoryDB begins taking a daily snapshot of your shard. Example: 05:00-09:00 If you do not specify this parameter, MemoryDB automatically chooses an appropriate time range.

ACLName -> (string)

The name of the Access Control List associated with this cluster.

AutoMinorVersionUpgrade -> (boolean)

When set to true, the cluster will automatically receive minor engine version upgrades after launch.

DataTiering -> (string)

Enables data tiering. Data tiering is only supported for clusters using the r6gd node type. This parameter must be set when using r6gd nodes. For more information, see Data tiering .