Source code for airflow.providers.amazon.aws.hooks.redshift
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"""Interact with AWS Redshift, using the boto3 library."""
from typing import List, Optional
from airflow.providers.amazon.aws.hooks.base_aws import AwsBaseHook
[docs]class RedshiftHook(AwsBaseHook):
"""
Interact with AWS Redshift, using the boto3 library
Additional arguments (such as ``aws_conn_id``) may be specified and
are passed down to the underlying AwsBaseHook.
.. seealso::
:class:`~airflow.providers.amazon.aws.hooks.base_aws.AwsBaseHook`
"""
def __init__(self, *args, **kwargs) -> None:
kwargs["client_type"] = "redshift"
super().__init__(*args, **kwargs)
# TODO: Wrap create_cluster_snapshot
[docs] def cluster_status(self, cluster_identifier: str) -> str:
"""
Return status of a cluster
:param cluster_identifier: unique identifier of a cluster
:type cluster_identifier: str
"""
try:
response = self.get_conn().describe_clusters(ClusterIdentifier=cluster_identifier)['Clusters']
return response[0]['ClusterStatus'] if response else None
except self.get_conn().exceptions.ClusterNotFoundFault:
return 'cluster_not_found'
[docs] def delete_cluster( # pylint: disable=invalid-name
self,
cluster_identifier: str,
skip_final_cluster_snapshot: bool = True,
final_cluster_snapshot_identifier: Optional[str] = None,
):
"""
Delete a cluster and optionally create a snapshot
:param cluster_identifier: unique identifier of a cluster
:type cluster_identifier: str
:param skip_final_cluster_snapshot: determines cluster snapshot creation
:type skip_final_cluster_snapshot: bool
:param final_cluster_snapshot_identifier: name of final cluster snapshot
:type final_cluster_snapshot_identifier: str
"""
final_cluster_snapshot_identifier = final_cluster_snapshot_identifier or ''
response = self.get_conn().delete_cluster(
ClusterIdentifier=cluster_identifier,
SkipFinalClusterSnapshot=skip_final_cluster_snapshot,
FinalClusterSnapshotIdentifier=final_cluster_snapshot_identifier,
)
return response['Cluster'] if response['Cluster'] else None
[docs] def describe_cluster_snapshots(self, cluster_identifier: str) -> Optional[List[str]]:
"""
Gets a list of snapshots for a cluster
:param cluster_identifier: unique identifier of a cluster
:type cluster_identifier: str
"""
response = self.get_conn().describe_cluster_snapshots(ClusterIdentifier=cluster_identifier)
if 'Snapshots' not in response:
return None
snapshots = response['Snapshots']
snapshots = [snapshot for snapshot in snapshots if snapshot["Status"]]
snapshots.sort(key=lambda x: x['SnapshotCreateTime'], reverse=True)
return snapshots
[docs] def restore_from_cluster_snapshot(self, cluster_identifier: str, snapshot_identifier: str) -> str:
"""
Restores a cluster from its snapshot
:param cluster_identifier: unique identifier of a cluster
:type cluster_identifier: str
:param snapshot_identifier: unique identifier for a snapshot of a cluster
:type snapshot_identifier: str
"""
response = self.get_conn().restore_from_cluster_snapshot(
ClusterIdentifier=cluster_identifier, SnapshotIdentifier=snapshot_identifier
)
return response['Cluster'] if response['Cluster'] else None
[docs] def create_cluster_snapshot(self, snapshot_identifier: str, cluster_identifier: str) -> str:
"""
Creates a snapshot of a cluster
:param snapshot_identifier: unique identifier for a snapshot of a cluster
:type snapshot_identifier: str
:param cluster_identifier: unique identifier of a cluster
:type cluster_identifier: str
"""
response = self.get_conn().create_cluster_snapshot(
SnapshotIdentifier=snapshot_identifier,
ClusterIdentifier=cluster_identifier,
)
return response['Snapshot'] if response['Snapshot'] else None