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#!/usr/bin/env python
# vim:ts=4:sts=4:sw=4:et
#
# Author: Hari Sekhon
# Date: 2016-09-14 15:19:35 +0200 (Wed, 14 Sep 2016)
#
# https://github.com/harisekhon/devops-python-tools
#
# License: see accompanying Hari Sekhon LICENSE file
#
# If you're using my code you're welcome to connect with me on LinkedIn
# and optionally send me feedback to help steer this or other code I publish
#
# https://www.linkedin.com/in/harisekhon
#
"""
Tool to generate some random data in HBase for test purposes
Uses the HBase Thrift server. For versions older than HBase 0.96+ or using modified protocols, the connection
protocol / compat / transport settings will need to be adjusted.
Prints a dot for every 100 rows sent to let you know it's still working.
Tested on Hortonworks HDP 2.3 (HBase 1.1.2) and Apache HBase 1.0.3, 1.1.6, 1.2.1, 1.2.2, 1.3.1
"""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
#from __future__ import unicode_literals
#import logging
import os
import sys
import time
import traceback
import socket
try:
# pylint: disable=wrong-import-position
import happybase # pylint: disable=unused-import
# happybase.hbase.ttypes.IOError no longer there in Happybase 1.0
try:
# this is only importable after happybase module
# pylint: disable=import-error
from Hbase_thrift import IOError as HBaseIOError
except ImportError:
# probably Happybase <= 0.9
# pylint: disable=import-error,no-name-in-module,ungrouped-imports
from happybase.hbase.ttypes import IOError as HBaseIOError
from thriftpy.thrift import TException as ThriftException
import humanize
except ImportError as _:
print('module import error - did you forget to build this project?\n\n'
+ traceback.format_exc(), end='')
sys.exit(4)
srcdir = os.path.abspath(os.path.dirname(__file__))
libdir = os.path.join(srcdir, 'pylib')
sys.path.append(libdir)
try:
# pylint: disable=wrong-import-position
from harisekhon.utils import log, die, random_alnum, autoflush, log_option
from harisekhon.utils import validate_host, validate_port, validate_database_tablename, validate_int
from harisekhon import CLI
except ImportError as _:
print(traceback.format_exc(), end='')
sys.exit(4)
__author__ = 'Hari Sekhon'
__version__ = '0.5.2'
class HBaseGenerateData(CLI):
def __init__(self):
# Python 2.x
super(HBaseGenerateData, self).__init__()
# Python 3.x
# super().__init__()
self.conn = None
self.host = None
self.port = 9090
self.verbose_default = 2
self.default_table_name = 'HS_test_data'
self.default_num_rows = 10000
self.default_key_length = 20
self.default_value_length = 40
self.default_skew_pc = 90
self.table = self.default_table_name
self.num_rows = self.default_num_rows
self.key_length = self.default_key_length
self.value_length = self.default_value_length
self.skew = False
self.skew_pc = self.default_skew_pc
self.drop_table = False
self.use_existing_table = False
self.column_family = 'cf1'
self.timeout_default = 6 * 3600
autoflush()
def add_options(self):
self.add_hostoption(name='HBase Thrift Server', default_host='localhost', default_port=self.port)
self.add_opt('-T', '--table', default=self.default_table_name, help='Table to create with the generated data.' +
' Will refuse to send data to any already existing table for safety reasons')
self.add_opt('-n', '--num', default=self.default_num_rows,
help='Number of rows to generate (default {0})'.format(self.default_num_rows))
self.add_opt('-K', '--key-length', default=self.default_key_length,
help='Key length (default: {0})'.format(self.default_key_length))
self.add_opt('-L', '--value-length', default=self.default_value_length,
help='Value length (default: {0})'.format(self.default_value_length))
self.add_opt('-s', '--skew', action='store_true', default=False,
help='Skew the data row keys intentionally for testing (default: False). This will use a key of ' +
'all \'A\'s of length --key-length, plus a numerically incrementing padded suffix')
self.add_opt('--skew-percentage', '--pc', default=self.default_skew_pc,
help='Skew percentage (default: {0})'.format(self.default_skew_pc))
self.add_opt('-d', '--drop-table', action='store_true', default=False,
help='Drop test data table (only allowed if keeping the default table name for safety)')
self.add_opt('-X', '--use-existing-table', action='store_true',
help='Allows sending data to an existing table. ' +
'Dangerous but useful to test pre-splitting schemes on test tables')
def process_args(self):
# this resets DEBUG env var
#log.setLevel(logging.INFO)
self.no_args()
self.host = self.get_opt('host')
self.port = self.get_opt('port')
validate_host(self.host)
validate_port(self.port)
# happybase socket requires an integer
self.port = int(self.port)
self.table = self.get_opt('table')
self.num_rows = self.get_opt('num')
self.key_length = self.get_opt('key_length')
self.value_length = self.get_opt('value_length')
validate_database_tablename(self.table)
validate_int(self.num_rows, 'num rows', 1, 1000000000)
validate_int(self.key_length, 'key length', 10, 1000)
validate_int(self.value_length, 'value length', 1, 1000000)
self.num_rows = int(self.num_rows)
self.skew = self.get_opt('skew')
log_option('skew data', self.skew)
self.skew_pc = self.get_opt('skew_percentage')
validate_int(self.skew_pc, 'skew percentage', 0, 100)
self.skew_pc = int(self.skew_pc)
self.drop_table = self.get_opt('drop_table')
self.use_existing_table = self.get_opt('use_existing_table')
if self.drop_table and self.table != self.default_table_name:
die("not allowed to use --drop-table if using a table name other than the default table '{0}'"\
.format(self.default_table_name))
def get_tables(self):
try:
log.info('getting table list')
return self.conn.tables()
except (socket.timeout, ThriftException, HBaseIOError) as _:
die('ERROR while trying to get table list: {0}'.format(_))
def run(self):
# might have to use compat / transport / protocol args for older versions of HBase or if protocol has been
# configured to be non-default, see:
# http://happybase.readthedocs.io/en/stable/api.html#connection
try:
log.info('connecting to HBase Thrift Server at {0}:{1}'.format(self.host, self.port))
self.conn = happybase.Connection(host=self.host, port=self.port, timeout=10 * 1000) # ms
tables = self.get_tables()
# of course there is a minor race condition here between getting the table list, checking and creating
# not sure if it's solvable, if you have any idea of how to solve it please let me know, even locking
# would only protect again multiple runs of this script on the same machine...
if self.table in tables:
if self.drop_table:
log.info("table '%s' already existed but -d / --drop-table was specified, removing table first",
self.table)
self.conn.delete_table(self.table, disable=True)
# wait up to 30 secs for table to be deleted
#for _ in range(30):
# if self.table not in self.get_tables():
# break
# log.debug('waiting for table to be deleted before creating new one')
# time.sleep(1)
elif self.use_existing_table:
pass
else:
die("WARNING: table '{0}' already exists, will not send data to a pre-existing table for safety"\
.format(self.table) +
". You can choose to either --drop-table or --use-existing-table")
if not self.use_existing_table:
self.create_table()
self.populate_table()
log.info('finished, closing connection')
self.conn.close()
except (socket.timeout, ThriftException, HBaseIOError) as _:
die('ERROR: {0}'.format(_))
def create_table(self):
log.info('creating table %s', self.table)
self.conn.create_table(self.table, {self.column_family: dict(max_versions=1)})
def populate_table(self):
table = self.table
key_length = self.key_length
value_length = self.value_length
table_conn = None
# does not actually connect until sending data
#log.info("connecting to test table '%s'", table)
try:
table_conn = self.conn.table(table)
except (socket.timeout, ThriftException, HBaseIOError) as _:
die('ERROR while trying to connect to table \'{0}\': {1}'.format(table, _))
log.info("populating test table '%s' with random data", table)
if self.use_existing_table:
self.column_family = sorted(table_conn.families().keys())[0]
cf_col = self.column_family + ':col1'
try:
skew_prefix = 'A' * key_length
skew_mod = max(1, 100.0 / self.skew_pc)
#log.info('skew mod is %s', skew_mod)
width = len('{0}'.format(self.num_rows))
start = time.time()
for _ in range(self.num_rows):
if self.skew and int(_ % skew_mod) == 0:
table_conn.put(bytes(skew_prefix + '{number:0{width}d}'.format(width=width, number=_)), \
{bytes(cf_col): bytes(random_alnum(value_length))})
else:
table_conn.put(bytes(random_alnum(key_length)), {bytes(cf_col): bytes(random_alnum(value_length))})
if _ % 100 == 0:
print('.', file=sys.stderr, end='')
print(file=sys.stderr)
time_taken = time.time() - start
log.info('sent %s rows of generated data to HBase in %.2f seconds (%d rows/sec, %s/sec)',
self.num_rows,
time_taken,
self.num_rows / time_taken,
humanize.naturalsize(self.num_rows * (key_length + value_length) / time_taken)
)
except (socket.timeout, ThriftException, HBaseIOError) as _:
exp = str(_)
exp = exp.replace('\\n', '\n')
exp = exp.replace('\\t', '\t')
die('ERROR while trying to populate table \'{0}\': {1}'.format(table, exp))
if __name__ == '__main__':
HBaseGenerateData().main()
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