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Add option to put "database_prefix" when import is mode is "from_s3". #66

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Add option to put "database_prefix" when import is mode is "from_s3". #66

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68 changes: 53 additions & 15 deletions utilities/Hive_metastore_migration/src/import_into_datacatalog.py
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Original file line number Diff line number Diff line change
@@ -1,14 +1,34 @@
# Copyright 2016-2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.
# SPDX-License-Identifier: MIT-0
# 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/
#
# and in the "LICENSE" file accompanying this file. This file is distributed
# on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, express
# or implied. See the License for the specific language governing
# permissions and limitations under the License.


from __future__ import print_function

import logging
import os

from pyspark.sql.functions import lit, struct, array, col, concat

from awsglue.context import GlueContext
from awsglue.dynamicframe import DynamicFrame

from hive_metastore_migration import *


logging.basicConfig()
logger = logging.getLogger(__name__)
logger.setLevel(getattr(logging, os.getenv('LOG_LEVEL', 'INFO')))


def transform_df_to_catalog_import_schema(sql_context, glue_context, df_databases, df_tables, df_partitions):
df_databases_array = df_databases.select(df_databases['type'], array(df_databases['item']).alias('items'))
df_tables_array = df_tables.select(df_tables['type'], df_tables['database'],
Expand Down Expand Up @@ -40,8 +60,8 @@ def import_datacatalog(sql_context, glue_context, datacatalog_name, databases, t
connection_options={'catalog.name': datacatalog_name, 'catalog.region': region})


def metastore_full_migration(sc, sql_context, glue_context, connection, datacatalog_name, db_prefix, table_prefix
, region):
def metastore_full_migration(sc, sql_context, glue_context, connection, datacatalog_name, db_prefix, table_prefix,
region):
# extract
hive_metastore = HiveMetastore(connection, sql_context)
hive_metastore.extract_metastore()
Expand All @@ -50,17 +70,25 @@ def metastore_full_migration(sc, sql_context, glue_context, connection, datacata
(databases, tables, partitions) = HiveMetastoreTransformer(
sc, sql_context, db_prefix, table_prefix).transform(hive_metastore)

#load
# load
import_datacatalog(sql_context, glue_context, datacatalog_name, databases, tables, partitions, region)


def metastore_import_from_s3(sql_context, glue_context,db_input_dir, tbl_input_dir, parts_input_dir,
datacatalog_name, region):
def metastore_import_from_s3(sql_context, glue_context, db_input_dir, tbl_input_dir, parts_input_dir, db_prefix, datacatalog_name,
region):

# extract
databases = sql_context.read.json(path=db_input_dir, schema=METASTORE_DATABASE_SCHEMA)
tables = sql_context.read.json(path=tbl_input_dir, schema=METASTORE_TABLE_SCHEMA)
partitions = sql_context.read.json(path=parts_input_dir, schema=METASTORE_PARTITION_SCHEMA)

# Changes to Prefix on database
if db_prefix:
databases = databases.withColumn('item', struct(col('item.description'), col('item.locationUri'), concat(lit(db_prefix),col('item.name')).alias('name'), col('item.parameters')))
tables = tables.withColumn("database",concat(lit(db_prefix),col('database')).alias('database'))
partitions = partitions.withColumn("database",concat(lit(db_prefix),col('database')).alias('database'))
partitions = partitions.withColumn('item', struct(col('item.creationTime'), col('item.creationTime'), concat(lit(db_prefix),col('item.namespaceName')).alias('namespaceName'), col('item.parameters'), col('item.storageDescriptor'), col('item.values')))


# load
import_datacatalog(sql_context, glue_context, datacatalog_name, databases, tables, partitions, region)
Expand All @@ -71,21 +99,29 @@ def main():
from_s3 = 'from-s3'
from_jdbc = 'from-jdbc'
parser = argparse.ArgumentParser(prog=sys.argv[0])
parser.add_argument('-m', '--mode', required=True, choices=[from_s3, from_jdbc], help='Choose to migrate metastore either from JDBC or from S3')
parser.add_argument('-c', '--connection-name', required=False, help='Glue Connection name for Hive metastore JDBC connection')
parser.add_argument('-R', '--region', required=False, help='AWS region of target Glue DataCatalog, default to "us-east-1"')
parser.add_argument('-d', '--database-prefix', required=False, help='Optional prefix for database names in Glue DataCatalog')
parser.add_argument('-t', '--table-prefix', required=False, help='Optional prefix for table name in Glue DataCatalog')
parser.add_argument('-D', '--database-input-path', required=False, help='An S3 path containing json files of metastore database entities')
parser.add_argument('-T', '--table-input-path', required=False, help='An S3 path containing json files of metastore table entities')
parser.add_argument('-P', '--partition-input-path', required=False, help='An S3 path containing json files of metastore partition entities')
parser.add_argument('-m', '--mode', required=True, choices=[from_s3, from_jdbc],
help='Choose to migrate metastore either from JDBC or from S3')
parser.add_argument('-c', '--connection-name', required=False,
help='Glue Connection name for Hive metastore JDBC connection')
parser.add_argument('-R', '--region', required=False,
help='AWS region of target Glue DataCatalog, default to "us-east-1"')
parser.add_argument('-d', '--database-prefix', required=False,
help='Optional prefix for database names in Glue DataCatalog')
parser.add_argument('-t', '--table-prefix', required=False,
help='Optional prefix for table name in Glue DataCatalog')
parser.add_argument('-D', '--database-input-path', required=False,
help='An S3 path containing json files of metastore database entities')
parser.add_argument('-T', '--table-input-path', required=False,
help='An S3 path containing json files of metastore table entities')
parser.add_argument('-P', '--partition-input-path', required=False,
help='An S3 path containing json files of metastore partition entities')

options = get_options(parser, sys.argv)
if options['mode'] == from_s3:
validate_options_in_mode(
options=options, mode=from_s3,
required_options=['database_input_path', 'table_input_path', 'partition_input_path'],
not_allowed_options=['database_prefix', 'table_prefix']
not_allowed_options=['table_prefix']
)
elif options['mode'] == from_jdbc:
validate_options_in_mode(
Expand All @@ -110,6 +146,7 @@ def main():
db_input_dir=options['database_input_path'],
tbl_input_dir=options['table_input_path'],
parts_input_dir=options['partition_input_path'],
db_prefix=options.get('database_prefix') or '',
datacatalog_name='datacatalog',
region=options.get('region') or 'us-east-1'
)
Expand All @@ -126,5 +163,6 @@ def main():
region=options.get('region') or 'us-east-1'
)


if __name__ == '__main__':
main()