mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-17 05:03:20 +00:00
379 lines
14 KiB
Python
379 lines
14 KiB
Python
import os
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import os.path as p
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import pwd
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import re
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import subprocess
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import shutil
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import distutils.dir_util
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import socket
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import time
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import errno
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from dicttoxml import dicttoxml
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import xml.dom.minidom
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from kazoo.client import KazooClient
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from kazoo.exceptions import KazooException
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import docker
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from docker.errors import ContainerError
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from .client import Client, CommandRequest
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HELPERS_DIR = p.dirname(__file__)
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class ClickHouseCluster:
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"""ClickHouse cluster with several instances and (possibly) ZooKeeper.
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Add instances with several calls to add_instance(), then start them with the start() call.
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Directories for instances are created in the directory of base_path. After cluster is started,
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these directories will contain logs, database files, docker-compose config, ClickHouse configs etc.
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"""
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def __init__(self, base_path, name=None, base_configs_dir=None, server_bin_path=None, client_bin_path=None,
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zookeeper_config_path=None):
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self.base_dir = p.dirname(base_path)
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self.name = name if name is not None else ''
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self.base_configs_dir = base_configs_dir or os.environ.get('CLICKHOUSE_TESTS_BASE_CONFIG_DIR', '/etc/clickhouse-server/')
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self.server_bin_path = server_bin_path or os.environ.get('CLICKHOUSE_TESTS_SERVER_BIN_PATH', '/usr/bin/clickhouse')
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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')
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self.project_name = pwd.getpwuid(os.getuid()).pw_name + p.basename(self.base_dir) + self.name
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# docker-compose removes everything non-alphanumeric from project names so we do it too.
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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))
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self.base_cmd = ['docker-compose', '--project-directory', self.base_dir, '--project-name', self.project_name]
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self.base_zookeeper_cmd = None
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self.pre_zookeeper_commands = []
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self.instances = {}
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self.with_zookeeper = False
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self.docker_client = None
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self.is_up = False
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def add_instance(self, name, config_dir=None, main_configs=[], user_configs=[], macroses={}, with_zookeeper=False,
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clickhouse_path_dir=None, hostname=None):
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"""Add an instance to the cluster.
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name - the name of the instance directory and the value of the 'instance' macro in ClickHouse.
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config_dir - a directory with config files which content will be copied to /etc/clickhouse-server/ directory
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main_configs - a list of config files that will be added to config.d/ directory
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user_configs - a list of config files that will be added to users.d/ directory
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with_zookeeper - if True, add ZooKeeper configuration to configs and ZooKeeper instances to the cluster.
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"""
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if self.is_up:
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raise Exception("Can\'t add instance %s: cluster is already up!" % name)
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if name in self.instances:
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raise Exception("Can\'t add instance `%s': there is already an instance with the same name!" % name)
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instance = ClickHouseInstance(
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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)
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self.instances[name] = instance
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self.base_cmd.extend(['--file', instance.docker_compose_path])
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if with_zookeeper and not self.with_zookeeper:
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self.with_zookeeper = True
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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',
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self.project_name, '--file', p.join(HELPERS_DIR, 'docker_compose_zookeeper.yml')]
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return instance
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def get_instance_docker_id(self, instance_name):
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# According to how docker-compose names containers.
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return self.project_name + '_' + instance_name + '_1'
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def get_instance_ip(self, instance_name):
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docker_id = self.get_instance_docker_id(instance_name)
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handle = self.docker_client.containers.get(docker_id)
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return handle.attrs['NetworkSettings']['Networks'].values()[0]['IPAddress']
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def start(self, destroy_dirs=True):
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if self.is_up:
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return
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# Just in case kill unstopped containers from previous launch
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try:
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if not subprocess.call(['docker-compose', 'kill']):
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subprocess.call(['docker-compose', 'down', '--volumes'])
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except:
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pass
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if destroy_dirs and p.exists(self.instances_dir):
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print "Removing instances dir", self.instances_dir
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shutil.rmtree(self.instances_dir)
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for instance in self.instances.values():
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instance.create_dir(destroy_dir=destroy_dirs)
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self.docker_client = docker.from_env()
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if self.with_zookeeper and self.base_zookeeper_cmd:
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subprocess.check_call(self.base_zookeeper_cmd + ['up', '-d', '--no-recreate'])
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for command in self.pre_zookeeper_commands:
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self.run_kazoo_commands_with_retries(command, repeats=5)
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# Uncomment for debugging
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# print ' '.join(self.base_cmd + ['up', '--no-recreate'])
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subprocess.check_call(self.base_cmd + ['up', '-d', '--no-recreate'])
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start_deadline = time.time() + 20.0 # seconds
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for instance in self.instances.itervalues():
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instance.docker_client = self.docker_client
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instance.ip_address = self.get_instance_ip(instance.name)
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instance.wait_for_start(start_deadline)
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instance.client = Client(instance.ip_address, command=self.client_bin_path)
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self.is_up = True
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def shutdown(self, kill=True):
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if kill:
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subprocess.check_call(self.base_cmd + ['kill'])
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subprocess.check_call(self.base_cmd + ['down', '--volumes', '--remove-orphans'])
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self.is_up = False
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self.docker_client = None
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for instance in self.instances.values():
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instance.docker_client = None
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instance.ip_address = None
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instance.client = None
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def get_kazoo_client(self, zoo_instance_name):
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zk = KazooClient(hosts=self.get_instance_ip(zoo_instance_name))
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zk.start()
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return zk
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def run_kazoo_commands_with_retries(self, kazoo_callback, zoo_instance_name = 'zoo1', repeats=1, sleep_for=1):
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for i in range(repeats - 1):
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try:
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kazoo_callback(self.get_kazoo_client(zoo_instance_name))
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return
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except KazooException as e:
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print repr(e)
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time.sleep(sleep_for)
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kazoo_callback(self.get_kazoo_client(zoo_instance_name))
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def add_zookeeper_startup_command(self, command):
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self.pre_zookeeper_commands.append(command)
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DOCKER_COMPOSE_TEMPLATE = '''
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version: '2'
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services:
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{name}:
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image: ubuntu:14.04
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hostname: {hostname}
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user: '{uid}'
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volumes:
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- {binary_path}:/usr/bin/clickhouse:ro
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- {configs_dir}:/etc/clickhouse-server/
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- {db_dir}:/var/lib/clickhouse/
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- {logs_dir}:/var/log/clickhouse-server/
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entrypoint:
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- /usr/bin/clickhouse
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- server
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- --config-file=/etc/clickhouse-server/config.xml
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- --log-file=/var/log/clickhouse-server/clickhouse-server.log
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depends_on: {depends_on}
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'''
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class ClickHouseInstance:
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def __init__(
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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):
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self.name = name
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self.base_cmd = cluster.base_cmd[:]
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self.docker_id = cluster.get_instance_docker_id(self.name)
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self.cluster = cluster
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self.hostname = hostname if hostname is not None else self.name
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self.custom_config_dir = p.abspath(p.join(base_path, custom_config_dir)) if custom_config_dir else None
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self.custom_main_config_paths = [p.abspath(p.join(base_path, c)) for c in custom_main_configs]
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self.custom_user_config_paths = [p.abspath(p.join(base_path, c)) for c in custom_user_configs]
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self.clickhouse_path_dir = p.abspath(p.join(base_path, clickhouse_path_dir)) if clickhouse_path_dir else None
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self.macroses = macroses if macroses is not None else {}
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self.with_zookeeper = with_zookeeper
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self.zookeeper_config_path = zookeeper_config_path
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self.base_configs_dir = base_configs_dir
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self.server_bin_path = server_bin_path
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self.path = p.join(self.cluster.instances_dir, name)
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self.docker_compose_path = p.join(self.path, 'docker_compose.yml')
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self.docker_client = None
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self.ip_address = None
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self.client = None
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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
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def query(self, *args, **kwargs):
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return self.client.query(*args, **kwargs)
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# As query() but doesn't wait response and returns response handler
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def get_query_request(self, *args, **kwargs):
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return self.client.get_query_request(*args, **kwargs)
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def exec_in_container(self, cmd, **kwargs):
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container = self.get_docker_handle()
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exec_id = self.docker_client.api.exec_create(container.id, cmd, **kwargs)
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output = self.docker_client.api.exec_start(exec_id, detach=False)
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output = output.decode('utf8')
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exit_code = self.docker_client.api.exec_inspect(exec_id)['ExitCode']
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if exit_code:
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raise Exception('Cmd "{}" failed! Return code {}. Output: {}'.format(' '.join(cmd), exit_code, output))
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return output
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def get_docker_handle(self):
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return self.docker_client.containers.get(self.docker_id)
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def stop(self):
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self.get_docker_handle().stop(self.default_timeout)
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def start(self):
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self.get_docker_handle().start()
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def wait_for_start(self, deadline=None, timeout=None):
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start_time = time.time()
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if timeout is not None:
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deadline = start_time + timeout
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while True:
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status = self.get_docker_handle().status
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if status == 'exited':
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raise Exception("Instance `{}' failed to start. Container status: {}".format(self.name, status))
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current_time = time.time()
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time_left = deadline - current_time
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if deadline is not None and current_time >= deadline:
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raise Exception("Timed out while waiting for instance `{}' with ip address {} to start. "
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"Container status: {}".format(self.name, self.ip_address, status))
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# Repeatedly poll the instance address until there is something that listens there.
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# Usually it means that ClickHouse is ready to accept queries.
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try:
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sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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sock.settimeout(time_left)
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sock.connect((self.ip_address, 9000))
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return
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except socket.timeout:
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continue
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except socket.error as e:
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if e.errno == errno.ECONNREFUSED:
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time.sleep(0.1)
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else:
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raise
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finally:
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sock.close()
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@staticmethod
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def dict_to_xml(dictionary):
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xml_str = dicttoxml(dictionary, custom_root="yandex", attr_type=False)
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return xml.dom.minidom.parseString(xml_str).toprettyxml()
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def create_dir(self, destroy_dir=True):
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"""Create the instance directory and all the needed files there."""
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if destroy_dir:
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self.destroy_dir()
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elif p.exists(self.path):
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return
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os.makedirs(self.path)
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configs_dir = p.abspath(p.join(self.path, 'configs'))
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os.mkdir(configs_dir)
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shutil.copy(p.join(self.base_configs_dir, 'config.xml'), configs_dir)
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shutil.copy(p.join(self.base_configs_dir, 'users.xml'), configs_dir)
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config_d_dir = p.abspath(p.join(configs_dir, 'config.d'))
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users_d_dir = p.abspath(p.join(configs_dir, 'users.d'))
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os.mkdir(config_d_dir)
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os.mkdir(users_d_dir)
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shutil.copy(p.join(HELPERS_DIR, 'common_instance_config.xml'), config_d_dir)
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# Generate and write macroses file
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macroses = self.macroses.copy()
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macroses['instance'] = self.name
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with open(p.join(config_d_dir, 'macros.xml'), 'w') as macros_config:
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macros_config.write(self.dict_to_xml({"macros" : macroses}))
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# Put ZooKeeper config
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if self.with_zookeeper:
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shutil.copy(self.zookeeper_config_path, config_d_dir)
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# Copy config dir
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if self.custom_config_dir:
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distutils.dir_util.copy_tree(self.custom_config_dir, configs_dir)
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# Copy config.d configs
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for path in self.custom_main_config_paths:
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shutil.copy(path, config_d_dir)
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# Copy users.d configs
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for path in self.custom_user_config_paths:
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shutil.copy(path, users_d_dir)
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db_dir = p.abspath(p.join(self.path, 'database'))
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os.mkdir(db_dir)
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if self.clickhouse_path_dir is not None:
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distutils.dir_util.copy_tree(self.clickhouse_path_dir, db_dir)
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logs_dir = p.abspath(p.join(self.path, 'logs'))
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os.mkdir(logs_dir)
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depends_on = '[]'
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if self.with_zookeeper:
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depends_on = '["zoo1", "zoo2", "zoo3"]'
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with open(self.docker_compose_path, 'w') as docker_compose:
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docker_compose.write(DOCKER_COMPOSE_TEMPLATE.format(
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name=self.name,
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hostname=self.hostname,
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uid=os.getuid(),
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binary_path=self.server_bin_path,
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configs_dir=configs_dir,
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config_d_dir=config_d_dir,
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db_dir=db_dir,
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logs_dir=logs_dir,
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depends_on=depends_on))
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def destroy_dir(self):
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if p.exists(self.path):
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shutil.rmtree(self.path)
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