Class Cluster (1.2.1)

Cluster(
    cluster_id,
    instance,
    location_id=None,
    serve_nodes=None,
    default_storage_type=None,
    _state=None,
)

Representation of a Google Cloud Bigtable Cluster.

We can use a Cluster to:

reload itself
create itself
update itself
delete 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.
`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.SHD`, Defaults to :data:`google.cloud.bigtable.enums.StorageType.UNSPECIFIED`.
`_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`.

Properties

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_cluster_name] :end-before: [END bigtable_cluster_name]

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_cluster_state] :end-before: [END bigtable_cluster_state]

Methods

create

create()

Create this cluster.

For example:

.. literalinclude:: snippets.py :start-after: [START bigtable_create_cluster] :end-before: [END bigtable_create_cluster]

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.

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_delete_cluster] :end-before: [END bigtable_delete_cluster]

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.

exists

exists()

Check whether the cluster already exists.

For example:

.. literalinclude:: snippets.py :start-after: [START bigtable_check_cluster_exists] :end-before: [END bigtable_check_cluster_exists]

Returns

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

from_pb

from_pb(cluster_pb, instance)

Creates an cluster instance from a protobuf.

For example:

.. literalinclude:: snippets.py :start-after: [START bigtable_cluster_from_pb] :end-before: [END bigtable_cluster_from_pb]

Parameters

Name	Description
`cluster_pb`	`instance_pb2.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_reload_cluster] :end-before: [END bigtable_reload_cluster]

update

update()

Update this cluster.

For example:

.. literalinclude:: snippets.py :start-after: [START bigtable_update_cluster] :end-before: [END bigtable_update_cluster]

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.

Parameters

Name	Description
`location`	`:str:CreationOnly` The location where this cluster's nodes and storage reside. For best performance, clients should be located as close as possible to this cluster. Currently only zones are supported, so values should be of the form `projects/`.
`serve_nodes`	`:int` The number of nodes allocated to this cluster. More nodes enable higher throughput and more consistent performance.

Returns

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