ClickHouse/dbms/tests/integration/helpers/cluster.py

607 lines
24 KiB
Python
Raw Normal View History

import os
import os.path as p
import pwd
import re
import subprocess
import shutil
import distutils.dir_util
import socket
import time
import errno
from dicttoxml import dicttoxml
2018-08-22 15:42:27 +00:00
import pymysql
import xml.dom.minidom
from kazoo.client import KazooClient
from kazoo.exceptions import KazooException
import psycopg2
import docker
2017-08-30 16:25:34 +00:00
from docker.errors import ContainerError
from .client import Client, CommandRequest
HELPERS_DIR = p.dirname(__file__)
DEFAULT_ENV_NAME = 'env_file'
def _create_env_file(path, variables, fname=DEFAULT_ENV_NAME):
full_path = os.path.join(path, fname)
with open(full_path, 'w') as f:
for var, value in variables.items():
f.write("=".join([var, value]) + "\n")
return full_path
2018-09-28 14:53:20 +00:00
def subprocess_check_call(args):
# Uncomment for debugging
# print('run:', ' ' . join(args))
subprocess.check_call(args)
def subprocess_call(args):
# Uncomment for debugging
# print('run:', ' ' . join(args))
subprocess.call(args)
class ClickHouseCluster:
"""ClickHouse cluster with several instances and (possibly) ZooKeeper.
Add instances with several calls to add_instance(), then start them with the start() call.
Directories for instances are created in the directory of base_path. After cluster is started,
these directories will contain logs, database files, docker-compose config, ClickHouse configs etc.
"""
2017-08-30 16:25:34 +00:00
def __init__(self, base_path, name=None, base_configs_dir=None, server_bin_path=None, client_bin_path=None,
zookeeper_config_path=None, custom_dockerd_host=None):
self.base_dir = p.dirname(base_path)
self.name = name if name is not None else ''
self.base_configs_dir = base_configs_dir or os.environ.get('CLICKHOUSE_TESTS_BASE_CONFIG_DIR', '/etc/clickhouse-server/')
2018-09-28 14:53:20 +00:00
self.server_bin_path = p.realpath(server_bin_path or os.environ.get('CLICKHOUSE_TESTS_SERVER_BIN_PATH', '/usr/bin/clickhouse'))
self.client_bin_path = p.realpath(client_bin_path or os.environ.get('CLICKHOUSE_TESTS_CLIENT_BIN_PATH', '/usr/bin/clickhouse-client'))
2017-08-30 16:25:34 +00:00
self.zookeeper_config_path = p.join(self.base_dir, zookeeper_config_path) if zookeeper_config_path else p.join(HELPERS_DIR, 'zookeeper_config.xml')
self.project_name = pwd.getpwuid(os.getuid()).pw_name + p.basename(self.base_dir) + self.name
# docker-compose removes everything non-alphanumeric from project names so we do it too.
self.project_name = re.sub(r'[^a-z0-9]', '', self.project_name.lower())
2017-07-26 12:31:55 +00:00
self.instances_dir = p.join(self.base_dir, '_instances' + ('' if not self.name else '_' + self.name))
custom_dockerd_host = custom_dockerd_host or os.environ.get('CLICKHOUSE_TESTS_DOCKERD_HOST')
self.docker_api_version = os.environ.get("DOCKER_API_VERSION")
self.base_cmd = ['docker-compose']
if custom_dockerd_host:
self.base_cmd += ['--host', custom_dockerd_host]
self.base_cmd += ['--project-directory', self.base_dir, '--project-name', self.project_name]
2017-08-30 16:25:34 +00:00
self.base_zookeeper_cmd = None
2018-05-14 11:10:07 +00:00
self.base_mysql_cmd = []
self.base_kafka_cmd = []
self.pre_zookeeper_commands = []
self.instances = {}
self.with_zookeeper = False
2018-05-14 11:10:07 +00:00
self.with_mysql = False
self.with_postgres = False
self.with_kafka = False
2018-08-22 15:42:27 +00:00
self.with_odbc_drivers = False
self.docker_client = None
self.is_up = False
2018-09-07 11:51:51 +00:00
def get_client_cmd(self):
cmd = self.client_bin_path
if p.basename(cmd) == 'clickhouse':
cmd += " client"
return cmd
def add_instance(self, name, config_dir=None, main_configs=[], user_configs=[], macros={}, with_zookeeper=False, with_mysql=False, with_kafka=False, clickhouse_path_dir=None, with_odbc_drivers=False, with_postgres=False, hostname=None, env_variables={}, image="yandex/clickhouse-integration-test", stay_alive=False):
"""Add an instance to the cluster.
name - the name of the instance directory and the value of the 'instance' macro in ClickHouse.
config_dir - a directory with config files which content will be copied to /etc/clickhouse-server/ directory
main_configs - a list of config files that will be added to config.d/ directory
user_configs - a list of config files that will be added to users.d/ directory
with_zookeeper - if True, add ZooKeeper configuration to configs and ZooKeeper instances to the cluster.
"""
if self.is_up:
raise Exception("Can\'t add instance %s: cluster is already up!" % name)
if name in self.instances:
raise Exception("Can\'t add instance `%s': there is already an instance with the same name!" % name)
instance = ClickHouseInstance(
self, self.base_dir, name, config_dir, main_configs, user_configs, macros, with_zookeeper,
2018-08-22 15:42:27 +00:00
self.zookeeper_config_path, with_mysql, with_kafka, self.base_configs_dir, self.server_bin_path,
clickhouse_path_dir, with_odbc_drivers, hostname=hostname, env_variables=env_variables, image=image, stay_alive=stay_alive)
self.instances[name] = instance
self.base_cmd.extend(['--file', instance.docker_compose_path])
if with_zookeeper and not self.with_zookeeper:
self.with_zookeeper = True
self.base_cmd.extend(['--file', p.join(HELPERS_DIR, 'docker_compose_zookeeper.yml')])
2017-08-30 16:25:34 +00:00
self.base_zookeeper_cmd = ['docker-compose', '--project-directory', self.base_dir, '--project-name',
self.project_name, '--file', p.join(HELPERS_DIR, 'docker_compose_zookeeper.yml')]
2018-05-14 11:10:07 +00:00
if with_mysql and not self.with_mysql:
self.with_mysql = True
self.base_cmd.extend(['--file', p.join(HELPERS_DIR, 'docker_compose_mysql.yml')])
self.base_mysql_cmd = ['docker-compose', '--project-directory', self.base_dir, '--project-name',
self.project_name, '--file', p.join(HELPERS_DIR, 'docker_compose_mysql.yml')]
if with_postgres and not self.with_postgres:
self.with_postgres = True
self.base_cmd.extend(['--file', p.join(HELPERS_DIR, 'docker_compose_postgres.yml')])
self.base_postgres_cmd = ['docker-compose', '--project-directory', self.base_dir, '--project-name',
self.project_name, '--file', p.join(HELPERS_DIR, 'docker_compose_postgres.yml')]
2018-08-22 15:42:27 +00:00
if with_odbc_drivers and not self.with_odbc_drivers:
self.with_odbc_drivers = True
if not self.with_mysql:
self.with_mysql = True
self.base_cmd.extend(['--file', p.join(HELPERS_DIR, 'docker_compose_mysql.yml')])
self.base_mysql_cmd = ['docker-compose', '--project-directory', self.base_dir, '--project-name',
self.project_name, '--file', p.join(HELPERS_DIR, 'docker_compose_mysql.yml')]
if not self.with_postgres:
self.with_postgres = True
self.base_cmd.extend(['--file', p.join(HELPERS_DIR, 'docker_compose_postgres.yml')])
self.base_postgres_cmd = ['docker-compose', '--project-directory', self.base_dir, '--project-name',
self.project_name, '--file', p.join(HELPERS_DIR, 'docker_compose_postgres.yml')]
2018-08-22 15:42:27 +00:00
if with_kafka and not self.with_kafka:
self.with_kafka = True
self.base_cmd.extend(['--file', p.join(HELPERS_DIR, 'docker_compose_kafka.yml')])
self.base_kafka_cmd = ['docker-compose', '--project-directory', self.base_dir, '--project-name',
self.project_name, '--file', p.join(HELPERS_DIR, 'docker_compose_kafka.yml')]
return instance
def get_instance_docker_id(self, instance_name):
# According to how docker-compose names containers.
return self.project_name + '_' + instance_name + '_1'
def get_instance_ip(self, instance_name):
docker_id = self.get_instance_docker_id(instance_name)
handle = self.docker_client.containers.get(docker_id)
return handle.attrs['NetworkSettings']['Networks'].values()[0]['IPAddress']
2018-08-22 15:42:27 +00:00
def wait_mysql_to_start(self, timeout=60):
start = time.time()
while time.time() - start < timeout:
try:
conn = pymysql.connect(user='root', password='clickhouse', host='127.0.0.1', port=3308)
conn.close()
print "Mysql Started"
return
2018-08-27 14:45:37 +00:00
except Exception as ex:
print "Can't connect to MySQL " + str(ex)
2018-08-22 15:42:27 +00:00
time.sleep(0.5)
raise Exception("Cannot wait MySQL container")
def wait_postgres_to_start(self, timeout=60):
start = time.time()
while time.time() - start < timeout:
try:
conn_string = "host='localhost' user='postgres' password='mysecretpassword'"
conn = psycopg2.connect(conn_string)
conn.close()
print "Postgres Started"
return
except Exception as ex:
print "Can't connect to Postgres " + str(ex)
time.sleep(0.5)
raise Exception("Cannot wait Postgres container")
def wait_zookeeper_to_start(self, timeout=60):
start = time.time()
while time.time() - start < timeout:
try:
for instance in ['zoo1', 'zoo2', 'zoo3']:
conn = self.get_kazoo_client(instance)
conn.get_children('/')
print "All instances of ZooKeeper started"
return
2018-08-27 14:45:37 +00:00
except Exception as ex:
print "Can't connect to ZooKeeper " + str(ex)
time.sleep(0.5)
raise Exception("Cannot wait ZooKeeper container")
def start(self, destroy_dirs=True):
if self.is_up:
return
# Just in case kill unstopped containers from previous launch
try:
2018-09-28 14:53:20 +00:00
if not subprocess_call(['docker-compose', 'kill']):
subprocess_call(['docker-compose', 'down', '--volumes'])
except:
pass
if destroy_dirs and p.exists(self.instances_dir):
print "Removing instances dir", self.instances_dir
2017-07-26 12:31:55 +00:00
shutil.rmtree(self.instances_dir)
for instance in self.instances.values():
instance.create_dir(destroy_dir=destroy_dirs)
2018-08-24 10:31:19 +00:00
self.docker_client = docker.from_env(version=self.docker_api_version)
2017-08-30 16:25:34 +00:00
if self.with_zookeeper and self.base_zookeeper_cmd:
subprocess_check_call(self.base_zookeeper_cmd + ['up', '-d', '--force-recreate'])
for command in self.pre_zookeeper_commands:
self.run_kazoo_commands_with_retries(command, repeats=5)
self.wait_zookeeper_to_start(120)
2017-08-30 16:25:34 +00:00
2018-05-14 11:10:07 +00:00
if self.with_mysql and self.base_mysql_cmd:
subprocess_check_call(self.base_mysql_cmd + ['up', '-d', '--force-recreate'])
self.wait_mysql_to_start(120)
2018-05-14 11:10:07 +00:00
if self.with_postgres and self.base_postgres_cmd:
subprocess_check_call(self.base_postgres_cmd + ['up', '-d', '--force-recreate'])
self.wait_postgres_to_start(120)
if self.with_kafka and self.base_kafka_cmd:
subprocess_check_call(self.base_kafka_cmd + ['up', '-d', '--force-recreate'])
2018-07-26 04:36:28 +00:00
self.kafka_docker_id = self.get_instance_docker_id('kafka1')
subprocess_check_call(self.base_cmd + ['up', '-d', '--force-recreate'])
2017-08-30 16:25:34 +00:00
start_deadline = time.time() + 20.0 # seconds
for instance in self.instances.itervalues():
instance.docker_client = self.docker_client
instance.ip_address = self.get_instance_ip(instance.name)
instance.wait_for_start(start_deadline)
instance.client = Client(instance.ip_address, command=self.client_bin_path)
self.is_up = True
def shutdown(self, kill=True):
if kill:
2018-09-28 14:53:20 +00:00
subprocess_check_call(self.base_cmd + ['kill'])
subprocess_check_call(self.base_cmd + ['down', '--volumes', '--remove-orphans'])
self.is_up = False
self.docker_client = None
for instance in self.instances.values():
instance.docker_client = None
instance.ip_address = None
instance.client = None
def get_kazoo_client(self, zoo_instance_name):
zk = KazooClient(hosts=self.get_instance_ip(zoo_instance_name))
zk.start()
return zk
def run_kazoo_commands_with_retries(self, kazoo_callback, zoo_instance_name = 'zoo1', repeats=1, sleep_for=1):
for i in range(repeats - 1):
2017-08-30 16:25:34 +00:00
try:
kazoo_callback(self.get_kazoo_client(zoo_instance_name))
return
except KazooException as e:
print repr(e)
2017-08-30 16:25:34 +00:00
time.sleep(sleep_for)
kazoo_callback(self.get_kazoo_client(zoo_instance_name))
2017-08-30 16:25:34 +00:00
def add_zookeeper_startup_command(self, command):
self.pre_zookeeper_commands.append(command)
2017-08-30 16:25:34 +00:00
CLICKHOUSE_START_COMMAND = "clickhouse server --config-file=/etc/clickhouse-server/config.xml --log-file=/var/log/clickhouse-server/clickhouse-server.log --errorlog-file=/var/log/clickhouse-server/clickhouse-server.err.log"
CLICKHOUSE_STAY_ALIVE_COMMAND = 'bash -c "{} --daemon; tail -f /dev/null"'.format(CLICKHOUSE_START_COMMAND)
DOCKER_COMPOSE_TEMPLATE = '''
version: '2'
services:
{name}:
2018-08-22 15:42:27 +00:00
image: {image}
hostname: {hostname}
user: '{uid}'
volumes:
- {binary_path}:/usr/bin/clickhouse:ro
- {configs_dir}:/etc/clickhouse-server/
- {db_dir}:/var/lib/clickhouse/
- {logs_dir}:/var/log/clickhouse-server/
2018-08-22 15:42:27 +00:00
{odbc_ini_path}
entrypoint: {entrypoint_cmd}
depends_on: {depends_on}
env_file:
- {env_file}
'''
class ClickHouseInstance:
2018-08-22 15:42:27 +00:00
def __init__(
self, cluster, base_path, name, custom_config_dir, custom_main_configs, custom_user_configs, macros,
2018-08-22 15:42:27 +00:00
with_zookeeper, zookeeper_config_path, with_mysql, with_kafka, base_configs_dir, server_bin_path,
clickhouse_path_dir, with_odbc_drivers, hostname=None, env_variables={}, image="yandex/clickhouse-integration-test", stay_alive=False):
self.name = name
self.base_cmd = cluster.base_cmd[:]
self.docker_id = cluster.get_instance_docker_id(self.name)
self.cluster = cluster
self.hostname = hostname if hostname is not None else self.name
self.custom_config_dir = p.abspath(p.join(base_path, custom_config_dir)) if custom_config_dir else None
self.custom_main_config_paths = [p.abspath(p.join(base_path, c)) for c in custom_main_configs]
self.custom_user_config_paths = [p.abspath(p.join(base_path, c)) for c in custom_user_configs]
self.clickhouse_path_dir = p.abspath(p.join(base_path, clickhouse_path_dir)) if clickhouse_path_dir else None
self.macros = macros if macros is not None else {}
self.with_zookeeper = with_zookeeper
2017-08-30 16:25:34 +00:00
self.zookeeper_config_path = zookeeper_config_path
self.base_configs_dir = base_configs_dir
self.server_bin_path = server_bin_path
2018-05-14 11:10:07 +00:00
self.with_mysql = with_mysql
self.with_kafka = with_kafka
2018-05-14 11:10:07 +00:00
2017-07-26 12:31:55 +00:00
self.path = p.join(self.cluster.instances_dir, name)
self.docker_compose_path = p.join(self.path, 'docker_compose.yml')
self.env_variables = env_variables
2018-08-22 15:42:27 +00:00
if with_odbc_drivers:
self.odbc_ini_path = os.path.dirname(self.docker_compose_path) + "/odbc.ini:/etc/odbc.ini"
self.with_mysql = True
else:
self.odbc_ini_path = ""
self.docker_client = None
self.ip_address = None
self.client = None
self.default_timeout = 20.0 # 20 sec
2018-08-22 15:42:27 +00:00
self.image = image
self.stay_alive = stay_alive
2017-08-14 01:29:19 +00:00
# Connects to the instance via clickhouse-client, sends a query (1st argument) and returns the answer
def query(self, sql, stdin=None, timeout=None, settings=None, user=None, ignore_error=False):
return self.client.query(sql, stdin, timeout, settings, user, ignore_error)
def query_with_retry(self, sql, stdin=None, timeout=None, settings=None, user=None, ignore_error=False, retry_count=20, sleep_time=0.5, check_callback=lambda x: True):
result = None
for i in range(retry_count):
try:
result = self.query(sql, stdin, timeout, settings, user, ignore_error)
if check_callback(result):
return result
time.sleep(sleep_time)
except Exception as ex:
print "Retry {} got exception {}".format(i + 1, ex)
time.sleep(sleep_time)
if result is not None:
return result
raise Exception("Can't execute query {}".format(sql))
2017-07-26 12:31:55 +00:00
# As query() but doesn't wait response and returns response handler
def get_query_request(self, *args, **kwargs):
return self.client.get_query_request(*args, **kwargs)
def exec_in_container(self, cmd, **kwargs):
container = self.get_docker_handle()
exec_id = self.docker_client.api.exec_create(container.id, cmd, **kwargs)
output = self.docker_client.api.exec_start(exec_id, detach=False)
output = output.decode('utf8')
exit_code = self.docker_client.api.exec_inspect(exec_id)['ExitCode']
if exit_code:
raise Exception('Cmd "{}" failed! Return code {}. Output: {}'.format(' '.join(cmd), exit_code, output))
return output
def get_docker_handle(self):
return self.docker_client.containers.get(self.docker_id)
def stop(self):
self.get_docker_handle().stop(self.default_timeout)
def start(self):
self.get_docker_handle().start()
def wait_for_start(self, deadline=None, timeout=None):
start_time = time.time()
if timeout is not None:
deadline = start_time + timeout
while True:
handle = self.get_docker_handle()
status = handle.status;
if status == 'exited':
raise Exception("Instance `{}' failed to start. Container status: {}, logs: {}".format(self.name, status, handle.logs()))
current_time = time.time()
time_left = deadline - current_time
if deadline is not None and current_time >= deadline:
raise Exception("Timed out while waiting for instance `{}' with ip address {} to start. "
"Container status: {}".format(self.name, self.ip_address, status))
# Repeatedly poll the instance address until there is something that listens there.
# Usually it means that ClickHouse is ready to accept queries.
try:
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.settimeout(time_left)
sock.connect((self.ip_address, 9000))
return
except socket.timeout:
continue
except socket.error as e:
if e.errno == errno.ECONNREFUSED:
time.sleep(0.1)
else:
raise
finally:
sock.close()
@staticmethod
def dict_to_xml(dictionary):
xml_str = dicttoxml(dictionary, custom_root="yandex", attr_type=False)
return xml.dom.minidom.parseString(xml_str).toprettyxml()
2018-08-22 15:42:27 +00:00
@property
def odbc_drivers(self):
if self.odbc_ini_path:
return {
"SQLite3": {
"DSN": "sqlite3_odbc",
"Database" : "/tmp/sqliteodbc",
"Driver": "/usr/lib/x86_64-linux-gnu/odbc/libsqlite3odbc.so",
"Setup": "/usr/lib/x86_64-linux-gnu/odbc/libsqlite3odbc.so",
},
"MySQL": {
"DSN": "mysql_odbc",
"Driver": "/usr/lib/x86_64-linux-gnu/odbc/libmyodbc.so",
"Database": "clickhouse",
"Uid": "root",
"Pwd": "clickhouse",
"Server": "mysql1",
},
"PostgreSQL": {
"DSN": "postgresql_odbc",
"Database": "postgres",
"UserName": "postgres",
"Password": "mysecretpassword",
"Port": "5432",
"Servername": "postgres1",
"Protocol": "9.3",
"ReadOnly": "No",
"RowVersioning": "No",
"ShowSystemTables": "No",
2018-08-22 15:42:27 +00:00
"Driver": "/usr/lib/x86_64-linux-gnu/odbc/psqlodbca.so",
"Setup": "/usr/lib/x86_64-linux-gnu/odbc/libodbcpsqlS.so",
"ConnSettings": "",
2018-08-22 15:42:27 +00:00
}
}
else:
return {}
def _create_odbc_config_file(self):
with open(self.odbc_ini_path.split(':')[0], 'w') as f:
for driver_setup in self.odbc_drivers.values():
f.write("[{}]\n".format(driver_setup["DSN"]))
for key, value in driver_setup.items():
if key != "DSN":
f.write(key + "=" + value + "\n")
def create_dir(self, destroy_dir=True):
"""Create the instance directory and all the needed files there."""
if destroy_dir:
self.destroy_dir()
elif p.exists(self.path):
return
os.makedirs(self.path)
configs_dir = p.abspath(p.join(self.path, 'configs'))
os.mkdir(configs_dir)
shutil.copy(p.join(self.base_configs_dir, 'config.xml'), configs_dir)
shutil.copy(p.join(self.base_configs_dir, 'users.xml'), configs_dir)
2018-09-28 14:53:20 +00:00
# used by all utils with any config
conf_d_dir = p.abspath(p.join(configs_dir, 'conf.d'))
# used by server with main config.xml
config_d_dir = p.abspath(p.join(configs_dir, 'config.d'))
users_d_dir = p.abspath(p.join(configs_dir, 'users.d'))
2018-09-28 14:53:20 +00:00
os.mkdir(conf_d_dir)
os.mkdir(config_d_dir)
2017-07-11 11:44:16 +00:00
os.mkdir(users_d_dir)
shutil.copy(p.join(HELPERS_DIR, 'common_instance_config.xml'), config_d_dir)
# Generate and write macros file
macros = self.macros.copy()
macros['instance'] = self.name
with open(p.join(config_d_dir, 'macros.xml'), 'w') as macros_config:
macros_config.write(self.dict_to_xml({"macros" : macros}))
# Put ZooKeeper config
if self.with_zookeeper:
2018-09-28 14:53:20 +00:00
shutil.copy(self.zookeeper_config_path, conf_d_dir)
# Copy config dir
if self.custom_config_dir:
distutils.dir_util.copy_tree(self.custom_config_dir, configs_dir)
# Copy config.d configs
for path in self.custom_main_config_paths:
shutil.copy(path, config_d_dir)
# Copy users.d configs
for path in self.custom_user_config_paths:
shutil.copy(path, users_d_dir)
db_dir = p.abspath(p.join(self.path, 'database'))
os.mkdir(db_dir)
if self.clickhouse_path_dir is not None:
distutils.dir_util.copy_tree(self.clickhouse_path_dir, db_dir)
logs_dir = p.abspath(p.join(self.path, 'logs'))
os.mkdir(logs_dir)
2018-05-14 11:10:07 +00:00
depends_on = []
if self.with_mysql:
depends_on.append("mysql1")
if self.with_kafka:
depends_on.append("kafka1")
if self.with_zookeeper:
2018-05-14 11:10:07 +00:00
depends_on.append("zoo1")
depends_on.append("zoo2")
depends_on.append("zoo3")
env_file = _create_env_file(os.path.dirname(self.docker_compose_path), self.env_variables)
2018-08-22 15:42:27 +00:00
odbc_ini_path = ""
if self.odbc_ini_path:
self._create_odbc_config_file()
odbc_ini_path = '- ' + self.odbc_ini_path
entrypoint_cmd = CLICKHOUSE_START_COMMAND
if self.stay_alive:
entrypoint_cmd = CLICKHOUSE_STAY_ALIVE_COMMAND
with open(self.docker_compose_path, 'w') as docker_compose:
docker_compose.write(DOCKER_COMPOSE_TEMPLATE.format(
2018-08-22 15:42:27 +00:00
image=self.image,
name=self.name,
hostname=self.hostname,
uid=os.getuid(),
binary_path=self.server_bin_path,
configs_dir=configs_dir,
config_d_dir=config_d_dir,
2018-05-14 11:14:49 +00:00
db_dir=db_dir,
logs_dir=logs_dir,
depends_on=str(depends_on),
2018-08-22 15:42:27 +00:00
env_file=env_file,
odbc_ini_path=odbc_ini_path,
entrypoint_cmd=entrypoint_cmd,
2018-08-22 15:42:27 +00:00
))
def destroy_dir(self):
if p.exists(self.path):
shutil.rmtree(self.path)