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

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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
import xml.dom.minidom
from kazoo.client import KazooClient
from kazoo.exceptions import KazooException
import docker
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from docker.errors import ContainerError
from .client import Client, CommandRequest
HELPERS_DIR = p.dirname(__file__)
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.
"""
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def __init__(self, base_path, name=None, base_configs_dir=None, server_bin_path=None, client_bin_path=None,
zookeeper_config_path=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/')
self.server_bin_path = server_bin_path or os.environ.get('CLICKHOUSE_TESTS_SERVER_BIN_PATH', '/usr/bin/clickhouse')
self.client_bin_path = client_bin_path or os.environ.get('CLICKHOUSE_TESTS_CLIENT_BIN_PATH', '/usr/bin/clickhouse-client')
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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())
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self.instances_dir = p.join(self.base_dir, '_instances' + ('' if not self.name else '_' + self.name))
self.base_cmd = ['docker-compose', '--project-directory', self.base_dir, '--project-name', self.project_name]
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self.base_zookeeper_cmd = None
self.pre_zookeeper_commands = []
self.instances = {}
self.with_zookeeper = False
self.docker_client = None
self.is_up = False
def add_instance(self, name, config_dir=None, main_configs=[], user_configs=[], macroses={}, with_zookeeper=False,
clickhouse_path_dir=None, hostname=None):
"""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, macroses, with_zookeeper,
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self.zookeeper_config_path, self.base_configs_dir, self.server_bin_path, clickhouse_path_dir, hostname=hostname)
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')])
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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')]
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']
def start(self, destroy_dirs=True):
if self.is_up:
return
# Just in case kill unstopped containers from previous launch
try:
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
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shutil.rmtree(self.instances_dir)
for instance in self.instances.values():
instance.create_dir(destroy_dir=destroy_dirs)
self.docker_client = docker.from_env()
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if self.with_zookeeper and self.base_zookeeper_cmd:
subprocess.check_call(self.base_zookeeper_cmd + ['up', '-d', '--no-recreate'])
for command in self.pre_zookeeper_commands:
self.run_kazoo_commands_with_retries(command, repeats=5)
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# Uncomment for debugging
# print ' '.join(self.base_cmd + ['up', '--no-recreate'])
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subprocess.check_call(self.base_cmd + ['up', '-d', '--no-recreate'])
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:
subprocess.check_call(self.base_cmd + ['kill'])
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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):
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try:
kazoo_callback(self.get_kazoo_client(zoo_instance_name))
return
except KazooException as e:
print repr(e)
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time.sleep(sleep_for)
kazoo_callback(self.get_kazoo_client(zoo_instance_name))
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def add_zookeeper_startup_command(self, command):
self.pre_zookeeper_commands.append(command)
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DOCKER_COMPOSE_TEMPLATE = '''
version: '2'
services:
{name}:
image: ubuntu:14.04
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/
entrypoint:
- /usr/bin/clickhouse
- server
- --config-file=/etc/clickhouse-server/config.xml
- --log-file=/var/log/clickhouse-server/clickhouse-server.log
depends_on: {depends_on}
'''
class ClickHouseInstance:
def __init__(
self, cluster, base_path, name, custom_config_dir, custom_main_configs, custom_user_configs, macroses,
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with_zookeeper, zookeeper_config_path, base_configs_dir, server_bin_path, clickhouse_path_dir, hostname=None):
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.macroses = macroses if macroses is not None else {}
self.with_zookeeper = with_zookeeper
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self.zookeeper_config_path = zookeeper_config_path
self.base_configs_dir = base_configs_dir
self.server_bin_path = server_bin_path
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self.path = p.join(self.cluster.instances_dir, name)
self.docker_compose_path = p.join(self.path, 'docker_compose.yml')
self.docker_client = None
self.ip_address = None
self.client = None
self.default_timeout = 20.0 # 20 sec
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# Connects to the instance via clickhouse-client, sends a query (1st argument) and returns the answer
def query(self, *args, **kwargs):
return self.client.query(*args, **kwargs)
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# 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:
status = self.get_docker_handle().status
if status == 'exited':
raise Exception("Instance `{}' failed to start. Container status: {}".format(self.name, status))
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()
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)
config_d_dir = p.abspath(p.join(configs_dir, 'config.d'))
users_d_dir = p.abspath(p.join(configs_dir, 'users.d'))
os.mkdir(config_d_dir)
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os.mkdir(users_d_dir)
shutil.copy(p.join(HELPERS_DIR, 'common_instance_config.xml'), config_d_dir)
# Generate and write macroses file
macroses = self.macroses.copy()
macroses['instance'] = self.name
with open(p.join(config_d_dir, 'macros.xml'), 'w') as macros_config:
macros_config.write(self.dict_to_xml({"macros" : macroses}))
# Put ZooKeeper config
if self.with_zookeeper:
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shutil.copy(self.zookeeper_config_path, config_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)
depends_on = '[]'
if self.with_zookeeper:
depends_on = '["zoo1", "zoo2", "zoo3"]'
with open(self.docker_compose_path, 'w') as docker_compose:
docker_compose.write(DOCKER_COMPOSE_TEMPLATE.format(
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,
db_dir=db_dir,
logs_dir=logs_dir,
depends_on=depends_on))
def destroy_dir(self):
if p.exists(self.path):
shutil.rmtree(self.path)