Class Cluster (2.8.1)

Cluster(
    cluster_id,
    instance,
    location_id=None,
    serve_nodes=None,
    default_storage_type=None,
    kms_key_name=None,
    _state=None,
    min_serve_nodes=None,
    max_serve_nodes=None,
    cpu_utilization_percent=None,
)

Representation of a Google Cloud Bigtable Cluster.

We can use a Cluster to:

reload itself
create itself
update itself
delete itself
disable_autoscaling itself

Parameters

Name	Description
`cluster_id`	`str` The ID of the cluster.
`instance`	`Instance` The instance where the cluster resides.
`location_id`	`str` (Creation Only) The location where this cluster's nodes and storage reside . For best performance, clients should be located as close as possible to this cluster. For list of supported locations refer to https://cloud.google.com/bigtable/docs/locations
`serve_nodes`	`int` (Optional) The number of nodes in the cluster for manual scaling. If any of the autoscaling configuration are specified, then the autoscaling configuration will take precedent.
`default_storage_type`	`int` (Optional) The type of storage Possible values are represented by the following constants: :data:`google.cloud.bigtable.enums.StorageType.SSD`. :data:`google.cloud.bigtable.enums.StorageType.HDD`, Defaults to :data:`google.cloud.bigtable.enums.StorageType.UNSPECIFIED`.
`kms_key_name`	`str` (Optional, Creation Only) The name of the KMS customer managed encryption key (CMEK) to use for at-rest encryption of data in this cluster. If omitted, Google's default encryption will be used. If specified, the requirements for this key are: 1) The Cloud Bigtable service account associated with the project that contains the cluster must be granted the `cloudkms.cryptoKeyEncrypterDecrypter` role on the CMEK. 2) Only regional keys can be used and the region of the CMEK key must match the region of the cluster. 3) All clusters within an instance must use the same CMEK key.
`_state`	`int` (`OutputOnly`) The current state of the cluster. Possible values are represented by the following constants: :data:`google.cloud.bigtable.enums.Cluster.State.NOT_KNOWN`. :data:`google.cloud.bigtable.enums.Cluster.State.READY`. :data:`google.cloud.bigtable.enums.Cluster.State.CREATING`. :data:`google.cloud.bigtable.enums.Cluster.State.RESIZING`. :data:`google.cloud.bigtable.enums.Cluster.State.DISABLED`.
`min_serve_nodes`	`int` (Optional) The minimum number of nodes to be set in the cluster for autoscaling. Must be 1 or greater. If specified, this configuration takes precedence over `serve_nodes`. If specified, then `max_serve_nodes` and `cpu_utilization_percent` must be specified too.
`max_serve_nodes`	`int` (Optional) The maximum number of nodes to be set in the cluster for autoscaling. If specified, this configuration takes precedence over `serve_nodes`. If specified, then `min_serve_nodes` and `cpu_utilization_percent` must be specified too.

Properties

kms_key_name

str: Customer managed encryption key for the cluster.

name

Cluster name used in requests.

Note: This property will not change if _instance and cluster_id do not, but the return value is not cached.

For example:

.. literalinclude:: snippets.py :start-after: [START bigtable_api_cluster_name] :end-before: [END bigtable_api_cluster_name] :dedent: 4

The cluster name is of the form

`"projects/{project}/instances/{instance}/clusters/{cluster_id}"`

Returns

Type	Description
`str`	The cluster name.

state

google.cloud.bigtable.enums.Cluster.State: state of cluster.

For example:

.. literalinclude:: snippets.py :start-after: [START bigtable_api_cluster_state] :end-before: [END bigtable_api_cluster_state] :dedent: 4

Methods

create

create()

Create this cluster.

For example:

.. literalinclude:: snippets.py :start-after: [START bigtable_api_create_cluster] :end-before: [END bigtable_api_create_cluster] :dedent: 4

Note: Uses the project, instance and cluster_id on the current Cluster in addition to the serve_nodes. To change them before creating, reset the values via .. code:: python cluster.serve_nodes = 8 cluster.cluster_id = 'i-changed-my-mind' before calling create.

Exceptions

Type	Description
`ValueErro

Returns

Type	Description
`google.api_core.operation.Operation`	The long-running operation corresponding to the create operation.

delete

delete()

Delete this cluster.

For example:

.. literalinclude:: snippets.py :start-after: [START bigtable_api_delete_cluster] :end-before: [END bigtable_api_delete_cluster] :dedent: 4

Marks a cluster and all of its tables for permanent deletion in 7 days.

Immediately upon completion of the request:

Billing will cease for all of the cluster's reserved resources.
The cluster's delete_time field will be set 7 days in the future.

Soon afterward:

All tables within the cluster will become unavailable.

At the cluster's delete_time:

The cluster and all of its tables will immediately and irrevocably disappear from the API, and their data will be permanently deleted.

disable_autoscaling

disable_autoscaling(serve_nodes)

Disable autoscaling by specifying the number of nodes.

For example:

.. literalinclude:: snippets.py :start-after: [START bigtable_api_cluster_disable_autoscaling] :end-before: [END bigtable_api_cluster_disable_autoscaling] :dedent: 4

Parameter

Name	Description
`serve_nodes`	`int` The number of nodes in the cluster.

exists

exists()

Check whether the cluster already exists.

For example:

.. literalinclude:: snippets.py :start-after: [START bigtable_api_check_cluster_exists] :end-before: [END bigtable_api_check_cluster_exists] :dedent: 4

Returns

Type	Description
`bool`	True if the table exists, else False.

from_pb

from_pb(cluster_pb, instance)

Creates a cluster instance from a protobuf.

For example:

.. literalinclude:: snippets.py :start-after: [START bigtable_api_cluster_from_pb] :end-before: [END bigtable_api_cluster_from_pb] :dedent: 4

Parameters

Name	Description
`cluster_pb`	`instance.Cluster` An instance protobuf object.
`instance`	`Instance` The instance that owns the cluster.

Exceptions

Type	Description
`ValueErro

Returns

Type	Description
`Cluster`	The Cluster parsed from the protobuf response.

reload

reload()

Reload the metadata for this cluster.

For example:

.. literalinclude:: snippets.py :start-after: [START bigtable_api_reload_cluster] :end-before: [END bigtable_api_reload_cluster] :dedent: 4

update

update()

Update this cluster.

For example:

.. literalinclude:: snippets.py :start-after: [START bigtable_api_update_cluster] :end-before: [END bigtable_api_update_cluster] :dedent: 4

Note: Updates the serve_nodes. If you'd like to change them before updating, reset the values via .. code:: python cluster.serve_nodes = 8 before calling update. If autoscaling is already enabled, manual scaling will be silently ignored. To disable autoscaling and enable manual scaling, use the disable_autoscaling instead.

Returns

Type	Description
`Operation`	The long-running operation corresponding to the update operation.