airflow rds 源码
airflow rds 代码
文件路径：/airflow/providers/amazon/aws/operators/rds.py
#
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# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
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# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
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# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
from __future__ import annotations
import json
import time
from typing import TYPE_CHECKING, Sequence
from mypy_boto3_rds.type_defs import TagTypeDef
from airflow.exceptions import AirflowException
from airflow.models import BaseOperator
from airflow.providers.amazon.aws.hooks.rds import RdsHook
from airflow.providers.amazon.aws.utils.rds import RdsDbType
if TYPE_CHECKING:
from airflow.utils.context import Context
class RdsBaseOperator(BaseOperator):
"""Base operator that implements common functions for all operators"""
ui_color = "#eeaa88"
ui_fgcolor = "#ffffff"
def __init__(self, *args, aws_conn_id: str = "aws_conn_id", hook_params: dict | None = None, **kwargs):
hook_params = hook_params or {}
self.hook = RdsHook(aws_conn_id=aws_conn_id, **hook_params)
super().__init__(*args, **kwargs)
self._await_interval = 60 # seconds
def _describe_item(self, item_type: str, item_name: str) -> list:
if item_type == 'instance_snapshot':
db_snaps = self.hook.conn.describe_db_snapshots(DBSnapshotIdentifier=item_name)
return db_snaps['DBSnapshots']
elif item_type == 'cluster_snapshot':
cl_snaps = self.hook.conn.describe_db_cluster_snapshots(DBClusterSnapshotIdentifier=item_name)
return cl_snaps['DBClusterSnapshots']
elif item_type == 'export_task':
exports = self.hook.conn.describe_export_tasks(ExportTaskIdentifier=item_name)
return exports['ExportTasks']
elif item_type == 'event_subscription':
subscriptions = self.hook.conn.describe_event_subscriptions(SubscriptionName=item_name)
return subscriptions['EventSubscriptionsList']
elif item_type == "db_instance":
instances = self.hook.conn.describe_db_instances(DBInstanceIdentifier=item_name)
return instances["DBInstances"]
elif item_type == "db_cluster":
clusters = self.hook.conn.describe_db_clusters(DBClusterIdentifier=item_name)
return clusters["DBClusters"]
else:
raise AirflowException(f"Method for {item_type} is not implemented")
def _await_status(
self,
item_type: str,
item_name: str,
wait_statuses: list[str] | None = None,
ok_statuses: list[str] | None = None,
error_statuses: list[str] | None = None,
) -> None:
"""
Continuously gets item description from `_describe_item()` and waits while:
- status is in `wait_statuses`
- status not in `ok_statuses` and `error_statuses`
"""
while True:
items = self._describe_item(item_type, item_name)
if len(items) == 0:
raise AirflowException(f"There is no {item_type} with identifier {item_name}")
if len(items) > 1:
raise AirflowException(f"There are {len(items)} {item_type} with identifier {item_name}")
if item_type == "db_instance":
status_field = "DBInstanceStatus"
else:
status_field = "Status"
if wait_statuses and items[0][status_field].lower() in wait_statuses:
time.sleep(self._await_interval)
continue
elif ok_statuses and items[0][status_field].lower() in ok_statuses:
break
elif error_statuses and items[0][status_field].lower() in error_statuses:
raise AirflowException(f"Item has error status ({error_statuses}): {items[0]}")
else:
raise AirflowException(f"Item has uncertain status: {items[0]}")
return None
def execute(self, context: Context) -> str:
"""Different implementations for snapshots, tasks and events"""
raise NotImplementedError
def on_kill(self) -> None:
"""Different implementations for snapshots, tasks and events"""
raise NotImplementedError
class RdsCreateDbSnapshotOperator(RdsBaseOperator):
"""
Creates a snapshot of a DB instance or DB cluster.
The source DB instance or cluster must be in the available or storage-optimization state.
.. seealso::
For more information on how to use this operator, take a look at the guide:
:ref:`howto/operator:RdsCreateDbSnapshotOperator`
:param db_type: Type of the DB - either "instance" or "cluster"
:param db_identifier: The identifier of the instance or cluster that you want to create the snapshot of
:param db_snapshot_identifier: The identifier for the DB snapshot
:param tags: A list of tags in format `[{"Key": "something", "Value": "something"},]
`USER Tagging <https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_Tagging.html>`__
:param wait_for_completion: If True, waits for creation of the DB snapshot to complete. (default: True)
"""
template_fields = ("db_snapshot_identifier", "db_identifier", "tags")
def __init__(
self,
*,
db_type: str,
db_identifier: str,
db_snapshot_identifier: str,
tags: Sequence[TagTypeDef] | None = None,
wait_for_completion: bool = True,
aws_conn_id: str = "aws_conn_id",
**kwargs,
):
super().__init__(aws_conn_id=aws_conn_id, **kwargs)
self.db_type = RdsDbType(db_type)
self.db_identifier = db_identifier
self.db_snapshot_identifier = db_snapshot_identifier
self.tags = tags or []
self.wait_for_completion = wait_for_completion
def execute(self, context: Context) -> str:
self.log.info(
"Starting to create snapshot of RDS %s '%s': %s",
self.db_type,
self.db_identifier,
self.db_snapshot_identifier,
)
if self.db_type.value == "instance":
create_instance_snap = self.hook.conn.create_db_snapshot(
DBInstanceIdentifier=self.db_identifier,
DBSnapshotIdentifier=self.db_snapshot_identifier,
Tags=self.tags,
)
create_response = json.dumps(create_instance_snap, default=str)
item_type = 'instance_snapshot'
else:
create_cluster_snap = self.hook.conn.create_db_cluster_snapshot(
DBClusterIdentifier=self.db_identifier,
DBClusterSnapshotIdentifier=self.db_snapshot_identifier,
Tags=self.tags,
)
create_response = json.dumps(create_cluster_snap, default=str)
item_type = 'cluster_snapshot'
if self.wait_for_completion:
self._await_status(
item_type,
self.db_snapshot_identifier,
wait_statuses=['creating'],
ok_statuses=['available'],
)
return create_response
class RdsCopyDbSnapshotOperator(RdsBaseOperator):
"""
Copies the specified DB instance or DB cluster snapshot
.. seealso::
For more information on how to use this operator, take a look at the guide:
:ref:`howto/operator:RdsCopyDbSnapshotOperator`
:param db_type: Type of the DB - either "instance" or "cluster"
:param source_db_snapshot_identifier: The identifier of the source snapshot
:param target_db_snapshot_identifier: The identifier of the target snapshot
:param kms_key_id: The AWS KMS key identifier for an encrypted DB snapshot
:param tags: A list of tags in format `[{"Key": "something", "Value": "something"},]
`USER Tagging <https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_Tagging.html>`__
:param copy_tags: Whether to copy all tags from the source snapshot to the target snapshot (default False)
:param pre_signed_url: The URL that contains a Signature Version 4 signed request
:param option_group_name: The name of an option group to associate with the copy of the snapshot
Only when db_type='instance'
:param target_custom_availability_zone: The external custom Availability Zone identifier for the target
Only when db_type='instance'
:param source_region: The ID of the region that contains the snapshot to be copied
:param wait_for_completion: If True, waits for snapshot copy to complete. (default: True)
"""
template_fields = (
"source_db_snapshot_identifier",
"target_db_snapshot_identifier",
"tags",
"pre_signed_url",
"option_group_name",
)
def __init__(
self,
*,
db_type: str,
source_db_snapshot_identifier: str,
target_db_snapshot_identifier: str,
kms_key_id: str = "",
tags: Sequence[TagTypeDef] | None = None,
copy_tags: bool = False,
pre_signed_url: str = "",
option_group_name: str = "",
target_custom_availability_zone: str = "",
source_region: str = "",
wait_for_completion: bool = True,
aws_conn_id: str = "aws_default",
**kwargs,
):
super().__init__(aws_conn_id=aws_conn_id, **kwargs)
self.db_type = RdsDbType(db_type)
self.source_db_snapshot_identifier = source_db_snapshot_identifier
self.target_db_snapshot_identifier = target_db_snapshot_identifier
self.kms_key_id = kms_key_id
self.tags = tags or []
self.copy_tags = copy_tags
self.pre_signed_url = pre_signed_url
self.option_group_name = option_group_name
self.target_custom_availability_zone = target_custom_availability_zone
self.source_region = source_region
self.wait_for_completion = wait_for_completion
def execute(self, context: Context) -> str:
self.log.info(
"Starting to copy snapshot '%s' as '%s'",
self.source_db_snapshot_identifier,
self.target_db_snapshot_identifier,
)
if self.db_type.value == "instance":
copy_instance_snap = self.hook.conn.copy_db_snapshot(
SourceDBSnapshotIdentifier=self.source_db_snapshot_identifier,
TargetDBSnapshotIdentifier=self.target_db_snapshot_identifier,
KmsKeyId=self.kms_key_id,
Tags=self.tags,
CopyTags=self.copy_tags,
PreSignedUrl=self.pre_signed_url,
OptionGroupName=self.option_group_name,
TargetCustomAvailabilityZone=self.target_custom_availability_zone,
SourceRegion=self.source_region,
)
copy_response = json.dumps(copy_instance_snap, default=str)
item_type = 'instance_snapshot'
else:
copy_cluster_snap = self.hook.conn.copy_db_cluster_snapshot(
SourceDBClusterSnapshotIdentifier=self.source_db_snapshot_identifier,
TargetDBClusterSnapshotIdentifier=self.target_db_snapshot_identifier,
KmsKeyId=self.kms_key_id,
Tags=self.tags,
CopyTags=self.copy_tags,
PreSignedUrl=self.pre_signed_url,
SourceRegion=self.source_region,
)
copy_response = json.dumps(copy_cluster_snap, default=str)
item_type = 'cluster_snapshot'
if self.wait_for_completion:
self._await_status(
item_type,
self.target_db_snapshot_identifier,
wait_statuses=['creating', 'copying'],
ok_statuses=['available'],
)
return copy_response
class RdsDeleteDbSnapshotOperator(RdsBaseOperator):
"""
Deletes a DB instance or cluster snapshot or terminating the copy operation
.. seealso::
For more information on how to use this operator, take a look at the guide:
:ref:`howto/operator:RdsDeleteDbSnapshotOperator`
:param db_type: Type of the DB - either "instance" or "cluster"
:param db_snapshot_identifier: The identifier for the DB instance or DB cluster snapshot
"""
template_fields = ("db_snapshot_identifier",)
def __init__(
self,
*,
db_type: str,
db_snapshot_identifier: str,
aws_conn_id: str = "aws_default",
**kwargs,
):
super().__init__(aws_conn_id=aws_conn_id, **kwargs)
self.db_type = RdsDbType(db_type)
self.db_snapshot_identifier = db_snapshot_identifier
def execute(self, context: Context) -> str:
self.log.info("Starting to delete snapshot '%s'", self.db_snapshot_identifier)
if self.db_type.value == "instance":
delete_instance_snap = self.hook.conn.delete_db_snapshot(
DBSnapshotIdentifier=self.db_snapshot_identifier,
)
delete_response = json.dumps(delete_instance_snap, default=str)
else:
delete_cluster_snap = self.hook.conn.delete_db_cluster_snapshot(
DBClusterSnapshotIdentifier=self.db_snapshot_identifier,
)
delete_response = json.dumps(delete_cluster_snap, default=str)
return delete_response
class RdsStartExportTaskOperator(RdsBaseOperator):
"""
Starts an export of a snapshot to Amazon S3. The provided IAM role must have access to the S3 bucket.
.. seealso::
For more information on how to use this operator, take a look at the guide:
:ref:`howto/operator:RdsStartExportTaskOperator`
:param export_task_identifier: A unique identifier for the snapshot export task.
:param source_arn: The Amazon Resource Name (ARN) of the snapshot to export to Amazon S3.
:param s3_bucket_name: The name of the Amazon S3 bucket to export the snapshot to.
:param iam_role_arn: The name of the IAM role to use for writing to the Amazon S3 bucket.
:param kms_key_id: The ID of the Amazon Web Services KMS key to use to encrypt the snapshot.
:param s3_prefix: The Amazon S3 bucket prefix to use as the file name and path of the exported snapshot.
:param export_only: The data to be exported from the snapshot.
:param wait_for_completion: If True, waits for the DB snapshot export to complete. (default: True)
"""
template_fields = (
"export_task_identifier",
"source_arn",
"s3_bucket_name",
"iam_role_arn",
"kms_key_id",
"s3_prefix",
"export_only",
)
def __init__(
self,
*,
export_task_identifier: str,
source_arn: str,
s3_bucket_name: str,
iam_role_arn: str,
kms_key_id: str,
s3_prefix: str = '',
export_only: list[str] | None = None,
wait_for_completion: bool = True,
aws_conn_id: str = "aws_default",
**kwargs,
):
super().__init__(aws_conn_id=aws_conn_id, **kwargs)
self.export_task_identifier = export_task_identifier
self.source_arn = source_arn
self.s3_bucket_name = s3_bucket_name
self.iam_role_arn = iam_role_arn
self.kms_key_id = kms_key_id
self.s3_prefix = s3_prefix
self.export_only = export_only or []
self.wait_for_completion = wait_for_completion
def execute(self, context: Context) -> str:
self.log.info("Starting export task %s for snapshot %s", self.export_task_identifier, self.source_arn)
start_export = self.hook.conn.start_export_task(
ExportTaskIdentifier=self.export_task_identifier,
SourceArn=self.source_arn,
S3BucketName=self.s3_bucket_name,
IamRoleArn=self.iam_role_arn,
KmsKeyId=self.kms_key_id,
S3Prefix=self.s3_prefix,
ExportOnly=self.export_only,
)
if self.wait_for_completion:
self._await_status(
'export_task',
self.export_task_identifier,
wait_statuses=['starting', 'in_progress'],
ok_statuses=['complete'],
error_statuses=['canceling', 'canceled'],
)
return json.dumps(start_export, default=str)
class RdsCancelExportTaskOperator(RdsBaseOperator):
"""
Cancels an export task in progress that is exporting a snapshot to Amazon S3
.. seealso::
For more information on how to use this operator, take a look at the guide:
:ref:`howto/operator:RdsCancelExportTaskOperator`
:param export_task_identifier: The identifier of the snapshot export task to cancel
:param wait_for_completion: If True, waits for DB snapshot export to cancel. (default: True)
"""
template_fields = ("export_task_identifier",)
def __init__(
self,
*,
export_task_identifier: str,
wait_for_completion: bool = True,
aws_conn_id: str = "aws_default",
**kwargs,
):
super().__init__(aws_conn_id=aws_conn_id, **kwargs)
self.export_task_identifier = export_task_identifier
self.wait_for_completion = wait_for_completion
def execute(self, context: Context) -> str:
self.log.info("Canceling export task %s", self.export_task_identifier)
cancel_export = self.hook.conn.cancel_export_task(
ExportTaskIdentifier=self.export_task_identifier,
)
if self.wait_for_completion:
self._await_status(
'export_task',
self.export_task_identifier,
wait_statuses=['canceling'],
ok_statuses=['canceled'],
)
return json.dumps(cancel_export, default=str)
class RdsCreateEventSubscriptionOperator(RdsBaseOperator):
"""
Creates an RDS event notification subscription
.. seealso::
For more information on how to use this operator, take a look at the guide:
:ref:`howto/operator:RdsCreateEventSubscriptionOperator`
:param subscription_name: The name of the subscription (must be less than 255 characters)
:param sns_topic_arn: The ARN of the SNS topic created for event notification
:param source_type: The type of source that is generating the events. Valid values: db-instance |
db-cluster | db-parameter-group | db-security-group | db-snapshot | db-cluster-snapshot | db-proxy
:param event_categories: A list of event categories for a source type that you want to subscribe to
`USER Events <https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_Events.Messages.html>`__
:param source_ids: The list of identifiers of the event sources for which events are returned
:param enabled: A value that indicates whether to activate the subscription (default True)l
:param tags: A list of tags in format `[{"Key": "something", "Value": "something"},]
`USER Tagging <https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_Tagging.html>`__
:param wait_for_completion: If True, waits for creation of the subscription to complete. (default: True)
"""
template_fields = (
"subscription_name",
"sns_topic_arn",
"source_type",
"event_categories",
"source_ids",
"tags",
)
def __init__(
self,
*,
subscription_name: str,
sns_topic_arn: str,
source_type: str = "",
event_categories: Sequence[str] | None = None,
source_ids: Sequence[str] | None = None,
enabled: bool = True,
tags: Sequence[TagTypeDef] | None = None,
wait_for_completion: bool = True,
aws_conn_id: str = "aws_default",
**kwargs,
):
super().__init__(aws_conn_id=aws_conn_id, **kwargs)
self.subscription_name = subscription_name
self.sns_topic_arn = sns_topic_arn
self.source_type = source_type
self.event_categories = event_categories or []
self.source_ids = source_ids or []
self.enabled = enabled
self.tags = tags or []
self.wait_for_completion = wait_for_completion
def execute(self, context: Context) -> str:
self.log.info("Creating event subscription '%s' to '%s'", self.subscription_name, self.sns_topic_arn)
create_subscription = self.hook.conn.create_event_subscription(
SubscriptionName=self.subscription_name,
SnsTopicArn=self.sns_topic_arn,
SourceType=self.source_type,
EventCategories=self.event_categories,
SourceIds=self.source_ids,
Enabled=self.enabled,
Tags=self.tags,
)
if self.wait_for_completion:
self._await_status(
'event_subscription',
self.subscription_name,
wait_statuses=['creating'],
ok_statuses=['active'],
)
return json.dumps(create_subscription, default=str)
class RdsDeleteEventSubscriptionOperator(RdsBaseOperator):
"""
Deletes an RDS event notification subscription
.. seealso::
For more information on how to use this operator, take a look at the guide:
:ref:`howto/operator:RdsDeleteEventSubscriptionOperator`
:param subscription_name: The name of the RDS event notification subscription you want to delete
"""
template_fields = ("subscription_name",)
def __init__(
self,
*,
subscription_name: str,
aws_conn_id: str = "aws_default",
**kwargs,
):
super().__init__(aws_conn_id=aws_conn_id, **kwargs)
self.subscription_name = subscription_name
def execute(self, context: Context) -> str:
self.log.info(
"Deleting event subscription %s",
self.subscription_name,
)
delete_subscription = self.hook.conn.delete_event_subscription(
SubscriptionName=self.subscription_name,
)
return json.dumps(delete_subscription, default=str)
class RdsCreateDbInstanceOperator(RdsBaseOperator):
"""
Creates an RDS DB instance
.. seealso::
For more information on how to use this operator, take a look at the guide:
:ref:`howto/operator:RdsCreateDbInstanceOperator`
:param db_instance_identifier: The DB instance identifier, must start with a letter and
contain from 1 to 63 letters, numbers, or hyphens
:param db_instance_class: The compute and memory capacity of the DB instance, for example db.m5.large
:param engine: The name of the database engine to be used for this instance
:param rds_kwargs: Named arguments to pass to boto3 RDS client function ``create_db_instance``
https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/rds.html#RDS.Client.create_db_instance
:param aws_conn_id: The Airflow connection used for AWS credentials.
:param wait_for_completion: If True, waits for creation of the DB instance to complete. (default: True)
"""
template_fields = ("db_instance_identifier", "db_instance_class", "engine", "rds_kwargs")
def __init__(
self,
*,
db_instance_identifier: str,
db_instance_class: str,
engine: str,
rds_kwargs: dict | None = None,
aws_conn_id: str = "aws_default",
wait_for_completion: bool = True,
**kwargs,
):
super().__init__(aws_conn_id=aws_conn_id, **kwargs)
self.db_instance_identifier = db_instance_identifier
self.db_instance_class = db_instance_class
self.engine = engine
self.rds_kwargs = rds_kwargs or {}
self.wait_for_completion = wait_for_completion
def execute(self, context: Context) -> str:
self.log.info("Creating new DB instance %s", self.db_instance_identifier)
create_db_instance = self.hook.conn.create_db_instance(
DBInstanceIdentifier=self.db_instance_identifier,
DBInstanceClass=self.db_instance_class,
Engine=self.engine,
**self.rds_kwargs,
)
if self.wait_for_completion:
self.hook.conn.get_waiter("db_instance_available").wait(
DBInstanceIdentifier=self.db_instance_identifier
)
return json.dumps(create_db_instance, default=str)
class RdsDeleteDbInstanceOperator(RdsBaseOperator):
"""
Deletes an RDS DB Instance
.. seealso::
For more information on how to use this operator, take a look at the guide:
:ref:`howto/operator:RdsDeleteDbInstanceOperator`
:param db_instance_identifier: The DB instance identifier for the DB instance to be deleted
:param rds_kwargs: Named arguments to pass to boto3 RDS client function ``delete_db_instance``
https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/rds.html#RDS.Client.delete_db_instance
:param aws_conn_id: The Airflow connection used for AWS credentials.
:param wait_for_completion: If True, waits for deletion of the DB instance to complete. (default: True)
"""
template_fields = ("db_instance_identifier", "rds_kwargs")
def __init__(
self,
*,
db_instance_identifier: str,
rds_kwargs: dict | None = None,
aws_conn_id: str = "aws_default",
wait_for_completion: bool = True,
**kwargs,
):
super().__init__(aws_conn_id=aws_conn_id, **kwargs)
self.db_instance_identifier = db_instance_identifier
self.rds_kwargs = rds_kwargs or {}
self.wait_for_completion = wait_for_completion
def execute(self, context: Context) -> str:
self.log.info("Deleting DB instance %s", self.db_instance_identifier)
delete_db_instance = self.hook.conn.delete_db_instance(
DBInstanceIdentifier=self.db_instance_identifier,
**self.rds_kwargs,
)
if self.wait_for_completion:
self.hook.conn.get_waiter("db_instance_deleted").wait(
DBInstanceIdentifier=self.db_instance_identifier
)
return json.dumps(delete_db_instance, default=str)
class RdsStartDbOperator(RdsBaseOperator):
"""
Starts an RDS DB instance / cluster
.. seealso::
For more information on how to use this operator, take a look at the guide:
:ref:`howto/operator:RdsStartDbOperator`
:param db_identifier: The AWS identifier of the DB to start
:param db_type: Type of the DB - either "instance" or "cluster" (default: "instance")
:param aws_conn_id: The Airflow connection used for AWS credentials. (default: "aws_default")
:param wait_for_completion: If True, waits for DB to start. (default: True)
"""
template_fields = ("db_identifier", "db_type")
def __init__(
self,
*,
db_identifier: str,
db_type: RdsDbType | str = RdsDbType.INSTANCE,
aws_conn_id: str = "aws_default",
wait_for_completion: bool = True,
**kwargs,
):
super().__init__(aws_conn_id=aws_conn_id, **kwargs)
self.db_identifier = db_identifier
self.db_type = db_type
self.wait_for_completion = wait_for_completion
def execute(self, context: Context) -> str:
self.db_type = RdsDbType(self.db_type)
start_db_response = self._start_db()
if self.wait_for_completion:
self._wait_until_db_available()
return json.dumps(start_db_response, default=str)
def _start_db(self):
self.log.info("Starting DB %s '%s'", self.db_type.value, self.db_identifier)
if self.db_type == RdsDbType.INSTANCE:
response = self.hook.conn.start_db_instance(DBInstanceIdentifier=self.db_identifier)
else:
response = self.hook.conn.start_db_cluster(DBClusterIdentifier=self.db_identifier)
return response
def _wait_until_db_available(self):
self.log.info("Waiting for DB %s to reach 'available' state", self.db_type.value)
if self.db_type == RdsDbType.INSTANCE:
self.hook.conn.get_waiter("db_instance_available").wait(DBInstanceIdentifier=self.db_identifier)
else:
self.hook.conn.get_waiter("db_cluster_available").wait(DBClusterIdentifier=self.db_identifier)
class RdsStopDbOperator(RdsBaseOperator):
"""
Stops an RDS DB instance / cluster
.. seealso::
For more information on how to use this operator, take a look at the guide:
:ref:`howto/operator:RdsStopDbOperator`
:param db_identifier: The AWS identifier of the DB to stop
:param db_type: Type of the DB - either "instance" or "cluster" (default: "instance")
:param db_snapshot_identifier: The instance identifier of the DB Snapshot to create before
stopping the DB instance. The default value (None) skips snapshot creation. This
parameter is ignored when ``db_type`` is "cluster"
:param aws_conn_id: The Airflow connection used for AWS credentials. (default: "aws_default")
:param wait_for_completion: If True, waits for DB to stop. (default: True)
"""
template_fields = ("db_identifier", "db_snapshot_identifier", "db_type")
def __init__(
self,
*,
db_identifier: str,
db_type: RdsDbType | str = RdsDbType.INSTANCE,
db_snapshot_identifier: str | None = None,
aws_conn_id: str = "aws_default",
wait_for_completion: bool = True,
**kwargs,
):
super().__init__(aws_conn_id=aws_conn_id, **kwargs)
self.db_identifier = db_identifier
self.db_type = db_type
self.db_snapshot_identifier = db_snapshot_identifier
self.wait_for_completion = wait_for_completion
def execute(self, context: Context) -> str:
self.db_type = RdsDbType(self.db_type)
stop_db_response = self._stop_db()
if self.wait_for_completion:
self._wait_until_db_stopped()
return json.dumps(stop_db_response, default=str)
def _stop_db(self):
self.log.info("Stopping DB %s '%s'", self.db_type.value, self.db_identifier)
if self.db_type == RdsDbType.INSTANCE:
conn_params = {"DBInstanceIdentifier": self.db_identifier}
# The db snapshot parameter is optional, but the AWS SDK raises an exception
# if passed a null value. Only set snapshot id if value is present.
if self.db_snapshot_identifier:
conn_params["DBSnapshotIdentifier"] = self.db_snapshot_identifier
response = self.hook.conn.stop_db_instance(**conn_params)
else:
if self.db_snapshot_identifier:
self.log.warning(
"'db_snapshot_identifier' does not apply to db clusters. "
"Remove it to silence this warning."
)
response = self.hook.conn.stop_db_cluster(DBClusterIdentifier=self.db_identifier)
return response
def _wait_until_db_stopped(self):
self.log.info("Waiting for DB %s to reach 'stopped' state", self.db_type.value)
wait_statuses = ["stopping"]
ok_statuses = ["stopped"]
if self.db_type == RdsDbType.INSTANCE:
self._await_status(
"db_instance", self.db_identifier, wait_statuses=wait_statuses, ok_statuses=ok_statuses
)
else:
self._await_status(
"db_cluster", self.db_identifier, wait_statuses=wait_statuses, ok_statuses=ok_statuses
)
__all__ = [
"RdsCreateDbSnapshotOperator",
"RdsCopyDbSnapshotOperator",
"RdsDeleteDbSnapshotOperator",
"RdsCreateEventSubscriptionOperator",
"RdsDeleteEventSubscriptionOperator",
"RdsStartExportTaskOperator",
"RdsCancelExportTaskOperator",
"RdsCreateDbInstanceOperator",
"RdsDeleteDbInstanceOperator",
"RdsStartDbOperator",
"RdsStopDbOperator",
]
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