Class Instance (1.4.0)

Instance(
    instance_id, client, display_name=None, instance_type=None, labels=None, _state=None
)

Representation of a Google Cloud Bigtable Instance.

We can use an Instance to:

reload itself
create itself
update itself
delete itself

Note: For now, we leave out the default_storage_type (an enum) which if not sent will end up as :data:.data_v2_pb2.STORAGE_SSD.

Parameters

Name	Description
`instance_id`	`str` The ID of the instance.
`client`	`Client` The client that owns the instance. Provides authorization and a project ID.
`display_name`	`str` (Optional) The display name for the instance in the Cloud Console UI. (Must be between 4 and 30 characters.) If this value is not set in the constructor, will fall back to the instance ID.
`instance_type`	`int` (Optional) The type of the instance. Possible values are represented by the following constants: :data:`google.cloud.bigtable.enums.Instance.Type.PRODUCTION`. :data:`google.cloud.bigtable.enums.Instance.Type.DEVELOPMENT`, Defaults to :data:`google.cloud.bigtable.enums.Instance.Type.UNSPECIFIED`.
`labels`	`dict` (Optional) Labels are a flexible and lightweight mechanism for organizing cloud resources into groups that reflect a customer's organizational needs and deployment strategies. They can be used to filter resources and aggregate metrics. Label keys must be between 1 and 63 characters long. Maximum 64 labels can be associated with a given resource. Label values must be between 0 and 63 characters long. Keys and values must both be under 128 bytes.
`_state`	`int` (`OutputOnly`) The current state of the instance. Possible values are represented by the following constants: :data:`google.cloud.bigtable.enums.Instance.State.STATE_NOT_KNOWN`. :data:`google.cloud.bigtable.enums.Instance.State.READY`. :data:`google.cloud.bigtable.enums.Instance.State.CREATING`.

Properties

name

Instance name used in requests.

Note: This property will not change if instance_id does not, but the return value is not cached.

For example:

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

The instance name is of the form

`"projects/{project}/instances/{instance_id}"`

Returns

Type	Description
`str`	Return a fully-qualified instance string.

state

google.cloud.bigtable.enums.Instance.State: state of Instance.

For example:

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

Methods

app_profile

app_profile(
    app_profile_id,
    routing_policy_type=None,
    description=None,
    cluster_id=None,
    allow_transactional_writes=None,
)

Factory to create AppProfile associated with this instance.

For example:

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

Parameter

Name Description

app_profile_id

str

The ID of the AppProfile. Must be of the form `<code>_a-zA-Z0-9][-_.a-zA-Z0-9]</code>*. :type: routing_policy_type: int :param: routing_policy_type: The type of the routing policy. Possible values are represented by the following constants: :data:google.cloud.bigtable.enums.RoutingPolicyType.ANY :data:google.cloud.bigtable.enums.RoutingPolicyType.SINGLE` :type: description: str :param: description: (Optional) Long form description of the use case for this AppProfile. :type: cluster_id: str :param: cluster_id: (Optional) Unique cluster_id which is only required when routing_policy_type is ROUTING_POLICY_TYPE_SINGLE. :type: allow_transactional_writes: bool :param: allow_transactional_writes: (Optional) If true, allow transactional writes for ROUTING_POLICY_TYPE_SINGLE.

Returns

Type	Description
`AppProfile>`	AppProfile for this instance.

cluster

cluster(cluster_id, location_id=None, serve_nodes=None, default_storage_type=None)

Factory to create a cluster associated with this instance.

For example:

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

Parameters

Name	Description
`cluster_id`	`str` The ID of the cluster.
`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`.

Returns

Type	Description
`Cluster`	a cluster owned by this instance.

create

create(
    location_id=None, serve_nodes=None, default_storage_type=None, clusters=None
)

Create this instance.

For example:

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

Note: Uses the project and instance_id on the current Instance in addition to the display_name. To change them before creating, reset the values via .. code:: python instance.display_name = 'New display name' instance.instance_id = 'i-changed-my-mind' before calling create.

Parameters

Name	Description
`location_id`	`str` (Creation Only) The location where nodes and storage of the cluster owned by this instance reside. For best performance, clients should be located as close as possible to cluster's location. For list of supported locations refer to https://cloud.google.com/bigtable/docs/locations
`serve_nodes`	`int` (Optional) The number of nodes in the instance's cluster; used to set up the instance's cluster.
`default_storage_type`	`int` (Optional) The storage media type for persisting Bigtable data. 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`.
`clusters`	class:``[google.cloud.bigtable.cluster.Cluster] List of clusters to be created.

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 instance.

For example:

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

Marks an instance and all of its tables for permanent deletion in 7 days.

Immediately upon completion of the request:

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

Soon afterward:

All tables within the instance will become unavailable.

At the instance's delete_time:

The instance 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 instance already exists.

For example:

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

Returns

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

from_pb

from_pb(instance_pb, client)

Creates an instance instance from a protobuf.

For example:

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

Parameters

Name	Description
`instance_pb`	`instance_pb2.Instance` An instance protobuf object.
`client`	`Client` The client that owns the instance.

Exceptions

Type	Description
`ValueErro

Returns

Type	Description
`Instance`	The instance parsed from the protobuf response.

get_iam_policy

get_iam_policy(requested_policy_version=None)

Gets the access control policy for an instance resource.

For example:

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

Parameter

Name Description

requested_policy_version

int or NoneType

Optional. The version of IAM policies to request. If a policy with a condition is requested without setting this, the server will return an error. This must be set to a value of 3 to retrieve IAM policies containing conditions. This is to prevent client code that isn't aware of IAM conditions from interpreting and modifying policies incorrectly. The service might return a policy with version lower than the one that was requested, based on the feature syntax in the policy fetched.

Returns

Type	Description
`Policy`	The current IAM policy of this instance

list_app_profiles

list_app_profiles()

Lists information about AppProfiles in an instance.

For example:

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

Returns

Type	Description
`:list:[AppProfile]`	A :list:[`AppProfile`]. By default, this is a list of AppProfile instances.

list_clusters

list_clusters()

List the clusters in this instance.

For example:

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

Returns

Type	Description
`tuple`	(clusters, failed_locations), where 'clusters' is list of Cluster, and 'failed_locations' is a list of locations which could not be resolved.

list_tables

list_tables()

List the tables in this instance.

For example:

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

Exceptions

Type	Description
`ValueErro

Returns

Type	Description
`list of Table`	The list of tables owned by the instance.

reload

reload()

Reload the metadata for this instance.

For example:

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

set_iam_policy

set_iam_policy(policy)

Sets the access control policy on an instance resource. Replaces any existing policy.

For more information about policy, please see documentation of class google.cloud.bigtable.policy.Policy

For example:

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

Parameter

Name	Description
`policy`	`Policy` A new IAM policy to replace the current IAM policy of this instance

Returns

Type	Description
`Policy`	The current IAM policy of this instance.

table

table(table_id, mutation_timeout=None, app_profile_id=None)

Factory to create a table associated with this instance.

For example:

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

Parameters

Name	Description
`table_id`	`str` The ID of the table.
`app_profile_id`	`str` (Optional) The unique name of the AppProfile.

Returns

Type	Description
`Table`	The table owned by this instance.

test_iam_permissions

test_iam_permissions(permissions)

Returns permissions that the caller has on the specified instance resource.

For example:

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

Parameter

Name	Description
`permissions`	`list` The set of permissions to check for the `resource`. Permissions with wildcards (such as '' or 'storage.') are not allowed. For more information see `IAM Overview https://cloud.google.com/iam/docs/overview#permissions`. `Bigtable Permissions https://cloud.google.com/bigtable/docs/access-control`.

Returns

Type	Description
`list`	A List(string) of permissions allowed on the instance

update

update()

Updates an instance within a project.

For example:

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

Note: Updates any or all of the following values: display_name type labels To change a value before updating, assign that values via .. code:: python instance.display_name = 'New display name' before calling update.

Returns

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