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redshift_unload_copy.py
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#!/usr/bin/env python
"""
Usage:
python redshift-unload-copy.py <config file> <region>
* Copyright 2014, Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Amazon Software License (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/asl/
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
"""
import json
import sys
import logging
from global_config import GlobalConfigParametersReader, config_parameters
from util.s3_utils import S3Helper, S3Details
from util.resources import ResourceFactory, TableResource, DBResource
from util.tasks import TaskManager, FailIfResourceDoesNotExistsTask, CreateIfTargetDoesNotExistTask, \
FailIfResourceClusterDoesNotExistsTask, UnloadDataToS3Task, CopyDataFromS3Task, CleanupS3StagingAreaTask, \
NoOperationTask
region = None
encryptionKeyID = 'alias/RedshiftUnloadCopyUtility'
def usage():
print("Redshift Unload/Copy Utility")
print("Exports data from a source Redshift database to S3 as an encrypted dataset, "
"and then imports into another Redshift Database")
print("")
print("Usage:")
print("python redshift_unload_copy.py <configuration> <region>")
print(" <configuration> Local Path or S3 Path to Configuration File on S3")
print(" <region> Region where Configuration File is stored (S3) "
"and where Master Keys and Data Exports are stored")
sys.exit(-1)
class ConfigHelper:
def __init__(self, config_path, s3_helper=None):
self.s3_helper = s3_helper
if config_path.startswith("s3://"):
if s3_helper is None:
raise Exception('No region set to get config file but it resides on S3')
self.config = s3_helper.get_json_config_as_dict(config_path)
else:
with open(config_path) as f:
self.config = json.load(f)
class UnloadCopyTool:
# noinspection PyDefaultArgument
def __init__(self,
config_file,
region_name,
global_config_values=GlobalConfigParametersReader().get_default_config_key_values()):
for key, value in global_config_values.items():
config_parameters[key] = value
self.region = region_name
self.s3_helper = S3Helper(self.region)
# load the configuration
self.config_helper = ConfigHelper(config_file, self.s3_helper)
source = ResourceFactory.get_source_resource_from_config_helper(self.config_helper, self.region)
destination = ResourceFactory.get_target_resource_from_config_helper(self.config_helper, self.region)
self.task_manager = TaskManager()
self.barrier_after_all_cluster_pre_tests = NoOperationTask()
self.task_manager.add_task(self.barrier_after_all_cluster_pre_tests)
self.barrier_after_all_resource_pre_tests = NoOperationTask()
self.task_manager.add_task(self.barrier_after_all_resource_pre_tests)
# TODO: Check whether both resources are of type table if that is not the case then perform other scenario's
if isinstance(source, TableResource):
if isinstance(destination, DBResource):
if not isinstance(destination, TableResource):
destination = ResourceFactory.get_table_resource_from_merging_2_resources(destination, source)
if global_config_values['tableName'] and global_config_values['tableName'] != 'None':
destination.set_table(global_config_values['tableName'])
self.add_table_migration(source, destination, global_config_values)
else:
logging.fatal('Destination should be a database resource')
raise NotImplementedError
pass
else:
# TODO: add additional scenario's
# For example if both resources are of type schema then create target schema and migrate all tables
logging.fatal('Source is not a Table, this type of unload-copy is currently not supported.')
raise NotImplementedError
self.task_manager.run()
def add_table_migration(self, source, destination, global_config_values):
if global_config_values['connectionPreTest']:
if not global_config_values['destinationTablePreTest']:
destination_cluster_pre_test = FailIfResourceClusterDoesNotExistsTask(resource=destination)
self.task_manager.add_task(destination_cluster_pre_test,
dependency_of=self.barrier_after_all_cluster_pre_tests)
if not global_config_values['sourceTablePreTest']:
source_cluster_pre_test = FailIfResourceClusterDoesNotExistsTask(resource=source)
self.task_manager.add_task(source_cluster_pre_test,
dependency_of=self.barrier_after_all_cluster_pre_tests)
if global_config_values['destinationTablePreTest']:
if global_config_values['destinationTableAutoCreate']:
destination_cluster_pre_test = FailIfResourceClusterDoesNotExistsTask(resource=destination)
self.task_manager.add_task(destination_cluster_pre_test,
dependency_of=self.barrier_after_all_cluster_pre_tests)
else:
destination_table_pre_test = FailIfResourceDoesNotExistsTask(destination)
self.task_manager.add_task(destination_table_pre_test,
dependency_of=self.barrier_after_all_resource_pre_tests,
dependencies=self.barrier_after_all_cluster_pre_tests)
if global_config_values['sourceTablePreTest']:
source_table_pre_test = FailIfResourceDoesNotExistsTask(source)
self.task_manager.add_task(source_table_pre_test,
dependency_of=self.barrier_after_all_resource_pre_tests,
dependencies=self.barrier_after_all_cluster_pre_tests)
if global_config_values['destinationTableAutoCreate']:
create_target = CreateIfTargetDoesNotExistTask(
source_resource=source,
target_resource=destination
)
self.task_manager.add_task(create_target,
dependency_of=self.barrier_after_all_resource_pre_tests,
dependencies=self.barrier_after_all_cluster_pre_tests)
s3_details = S3Details(self.config_helper, source, encryption_key_id=encryptionKeyID)
unload_data = UnloadDataToS3Task(source, s3_details)
self.task_manager.add_task(unload_data, dependencies=self.barrier_after_all_resource_pre_tests)
copy_data = CopyDataFromS3Task(destination, s3_details)
self.task_manager.add_task(copy_data, dependencies=unload_data)
s3_cleanup = CleanupS3StagingAreaTask(s3_details)
self.task_manager.add_task(s3_cleanup, dependencies=copy_data)
def set_log_level(log_level_string):
log_level_string = log_level_string.upper()
if not hasattr(logging, log_level_string):
logging.error('Could not find log_level {lvl}'.format(lvl=log_level_string))
logging.basicConfig(level=logging.INFO)
else:
stdout_handler = logging.StreamHandler(stream=sys.stdout)
stdout_handler.setLevel(logging.INFO)
formatter = logging.Formatter(
'[%(asctime)s] p%(process)s {%(pathname)s:%(lineno)d} %(levelname)s - %(message)s',
'%m-%d %H:%M:%S'
)
stderr_handler = logging.StreamHandler()
stderr_handler.setFormatter(formatter)
log_level = getattr(logging, log_level_string)
stderr_handler.setLevel(log_level)
logging.basicConfig(level=log_level, handlers=[stdout_handler, stderr_handler])
logging.debug('Log level set to {lvl}'.format(lvl=log_level_string))
def main(args):
global region
global_config_reader = GlobalConfigParametersReader()
global_config_values = global_config_reader.get_config_key_values_updated_with_cli_args(args)
set_log_level(global_config_values['logLevel'])
UnloadCopyTool(global_config_values['s3ConfigFile'], global_config_values['region'], global_config_values)
if __name__ == "__main__":
main(sys.argv)