describe-clusters¶
Description¶
Returns information about all provisioned DAX clusters if no cluster identifier is specified, or about a specific DAX cluster if a cluster identifier is supplied.
If the cluster is in the CREATING state, only cluster level information will be displayed until all of the nodes are successfully provisioned.
If the cluster is in the DELETING state, only cluster level information will be displayed.
If nodes are currently being added to the DAX cluster, node endpoint information and creation time for the additional nodes will not be displayed until they are completely provisioned. When the DAX cluster state is available , the cluster is ready for use.
If nodes are currently being removed from the DAX cluster, no endpoint information for the removed nodes is displayed.
See also: AWS API Documentation
See ‘aws help’ for descriptions of global parameters.
describe-clusters is a paginated operation. Multiple API calls may be issued in order to retrieve the entire data set of results. You can disable pagination by providing the --no-paginate argument.
When using --output text and the --query argument on a paginated response, the --query argument must extract data from the results of the following query expressions: Clusters
Synopsis¶
describe-clusters
[--cluster-names <value>]
[--cli-input-json | --cli-input-yaml]
[--starting-token <value>]
[--page-size <value>]
[--max-items <value>]
[--generate-cli-skeleton <value>]
Options¶
--cluster-names (list)
The names of the DAX clusters being described.
(string)
Syntax:
"string" "string" ...
--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.
--starting-token (string)
A token to specify where to start paginating. This is the
NextTokenfrom a previously truncated response.For usage examples, see Pagination in the AWS Command Line Interface User Guide .
--page-size (integer)
The size of each page to get in the AWS service call. This does not affect the number of items returned in the command’s output. Setting a smaller page size results in more calls to the AWS service, retrieving fewer items in each call. This can help prevent the AWS service calls from timing out.
For usage examples, see Pagination in the AWS Command Line Interface User Guide .
--max-items (integer)
The total number of items to return in the command’s output. If the total number of items available is more than the value specified, a
NextTokenis provided in the command’s output. To resume pagination, provide theNextTokenvalue in thestarting-tokenargument of a subsequent command. Do not use theNextTokenresponse element directly outside of the AWS CLI.For usage examples, see Pagination in the AWS Command Line Interface User Guide .
--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.
See ‘aws help’ for descriptions of global parameters.
Examples¶
To return information about all provisioned DAX clusters
The following describe-clusters example displays details about all provisioned DAX clusters.
aws dax describe-clusters
Output:
{
"Clusters": [
{
"ClusterName": "daxcluster",
"ClusterArn": "arn:aws:dax:us-west-2:123456789012:cache/daxcluster",
"TotalNodes": 1,
"ActiveNodes": 1,
"NodeType": "dax.r4.large",
"Status": "available",
"ClusterDiscoveryEndpoint": {
"Address": "daxcluster.ey3o9d.clustercfg.dax.usw2.cache.amazonaws.com",
"Port": 8111
},
"Nodes": [
{
"NodeId": "daxcluster-a",
"Endpoint": {
"Address": "daxcluster-a.ey3o9d.0001.dax.usw2.cache.amazonaws.com",
"Port": 8111
},
"NodeCreateTime": 1576625059.509,
"AvailabilityZone": "us-west-2c",
"NodeStatus": "available",
"ParameterGroupStatus": "in-sync"
}
],
"PreferredMaintenanceWindow": "thu:13:00-thu:14:00",
"SubnetGroup": "default",
"SecurityGroups": [
{
"SecurityGroupIdentifier": "sg-1af6e36e",
"Status": "active"
}
],
"IamRoleArn": "arn:aws:iam::123456789012:role/DAXServiceRoleForDynamoDBAccess",
"ParameterGroup": {
"ParameterGroupName": "default.dax1.0",
"ParameterApplyStatus": "in-sync",
"NodeIdsToReboot": []
},
"SSEDescription": {
"Status": "ENABLED"
}
}
]
}
For more information, see Managing DAX Clusters in the Amazon DynamoDB Developer Guide.
Output¶
NextToken -> (string)
Provides an identifier to allow retrieval of paginated results.
Clusters -> (list)
The descriptions of your DAX clusters, in response to a DescribeClusters request.
(structure)
Contains all of the attributes of a specific DAX cluster.
ClusterName -> (string)
The name of the DAX cluster.
Description -> (string)
The description of the cluster.
ClusterArn -> (string)
The Amazon Resource Name (ARN) that uniquely identifies the cluster.
TotalNodes -> (integer)
The total number of nodes in the cluster.
ActiveNodes -> (integer)
The number of nodes in the cluster that are active (i.e., capable of serving requests).
NodeType -> (string)
The node type for the nodes in the cluster. (All nodes in a DAX cluster are of the same type.)
Status -> (string)
The current status of the cluster.
ClusterDiscoveryEndpoint -> (structure)
The endpoint for this DAX cluster, consisting of a DNS name, a port number, and a URL. Applications should use the URL to configure the DAX client to find their cluster.
Address -> (string)
The DNS hostname of the endpoint.
Port -> (integer)
The port number that applications should use to connect to the endpoint.
URL -> (string)
The URL that applications should use to connect to the endpoint. The default ports are 8111 for the “dax” protocol and 9111 for the “daxs” protocol.
NodeIdsToRemove -> (list)
A list of nodes to be removed from the cluster.
(string)
Nodes -> (list)
A list of nodes that are currently in the cluster.
(structure)
Represents an individual node within a DAX cluster.
NodeId -> (string)
A system-generated identifier for the node.
Endpoint -> (structure)
The endpoint for the node, consisting of a DNS name and a port number. Client applications can connect directly to a node endpoint, if desired (as an alternative to allowing DAX client software to intelligently route requests and responses to nodes in the DAX cluster.
Address -> (string)
The DNS hostname of the endpoint.
Port -> (integer)
The port number that applications should use to connect to the endpoint.
URL -> (string)
The URL that applications should use to connect to the endpoint. The default ports are 8111 for the “dax” protocol and 9111 for the “daxs” protocol.
NodeCreateTime -> (timestamp)
The date and time (in UNIX epoch format) when the node was launched.
AvailabilityZone -> (string)
The Availability Zone (AZ) in which the node has been deployed.
NodeStatus -> (string)
The current status of the node. For example:
available.ParameterGroupStatus -> (string)
The status of the parameter group associated with this node. For example,
in-sync.PreferredMaintenanceWindow -> (string)
A range of time when maintenance of DAX cluster software will be performed. For example:
sun:01:00-sun:09:00. Cluster maintenance normally takes less than 30 minutes, and is performed automatically within the maintenance window.NotificationConfiguration -> (structure)
Describes a notification topic and its status. Notification topics are used for publishing DAX events to subscribers using Amazon Simple Notification Service (SNS).
TopicArn -> (string)
The Amazon Resource Name (ARN) that identifies the topic.
TopicStatus -> (string)
The current state of the topic. A value of “active” means that notifications will be sent to the topic. A value of “inactive” means that notifications will not be sent to the topic.
SubnetGroup -> (string)
The subnet group where the DAX cluster is running.
SecurityGroups -> (list)
A list of security groups, and the status of each, for the nodes in the cluster.
(structure)
An individual VPC security group and its status.
SecurityGroupIdentifier -> (string)
The unique ID for this security group.
Status -> (string)
The status of this security group.
IamRoleArn -> (string)
A valid Amazon Resource Name (ARN) that identifies an IAM role. At runtime, DAX will assume this role and use the role’s permissions to access DynamoDB on your behalf.
ParameterGroup -> (structure)
The parameter group being used by nodes in the cluster.
ParameterGroupName -> (string)
The name of the parameter group.
ParameterApplyStatus -> (string)
The status of parameter updates.
NodeIdsToReboot -> (list)
The node IDs of one or more nodes to be rebooted.
(string)
SSEDescription -> (structure)
The description of the server-side encryption status on the specified DAX cluster.
Status -> (string)
The current state of server-side encryption:
ENABLING- Server-side encryption is being enabled.
ENABLED- Server-side encryption is enabled.
DISABLING- Server-side encryption is being disabled.
DISABLED- Server-side encryption is disabled.ClusterEndpointEncryptionType -> (string)
The type of encryption supported by the cluster’s endpoint. Values are:
NONEfor no encryptionTLSfor Transport Layer Security