ClickHouse/tests/integration/test_reload_zookeeper/test.py
2020-11-27 14:05:59 +03:00

94 lines
3.0 KiB
Python

import time
import pytest
import os
from helpers.cluster import ClickHouseCluster
from helpers.client import QueryRuntimeException
from helpers.test_tools import assert_eq_with_retry
cluster = ClickHouseCluster(__file__, zookeeper_config_path='configs/zookeeper.xml')
node = cluster.add_instance('node', with_zookeeper=True)
@pytest.fixture(scope="module")
def start_cluster():
try:
cluster.start()
node.query(
'''
CREATE TABLE test_table(date Date, id UInt32)
ENGINE = ReplicatedMergeTree('/clickhouse/tables/shard1/test/test_table', '1')
PARTITION BY toYYYYMM(date)
ORDER BY id
''')
yield cluster
finally:
cluster.shutdown()
def test_reload_zookeeper(start_cluster):
def wait_zookeeper_node_to_start(zk_nodes, timeout=60):
start = time.time()
while time.time() - start < timeout:
try:
for instance in zk_nodes:
conn = start_cluster.get_kazoo_client(instance)
conn.get_children('/')
print("All instances of ZooKeeper started")
return
except Exception as ex:
print(("Can't connect to ZooKeeper " + str(ex)))
time.sleep(0.5)
node.query("INSERT INTO test_table(date, id) select today(), number FROM numbers(1000)")
## remove zoo2, zoo3 from configs
new_config = """
<yandex>
<zookeeper>
<node index="1">
<host>zoo1</host>
<port>2181</port>
</node>
<session_timeout_ms>2000</session_timeout_ms>
</zookeeper>
</yandex >
"""
node.replace_config("/etc/clickhouse-server/conf.d/zookeeper.xml", new_config)
node.query("SYSTEM RELOAD CONFIG")
## config reloads, but can still work
assert_eq_with_retry(node, "SELECT COUNT() FROM test_table", '1000', retry_count=120, sleep_time=0.5)
## stop all zookeepers, table will be readonly
cluster.stop_zookeeper_nodes(["zoo1", "zoo2", "zoo3"])
node.query("SELECT COUNT() FROM test_table")
with pytest.raises(QueryRuntimeException):
node.query("SELECT COUNT() FROM test_table", settings={"select_sequential_consistency" : 1})
## start zoo2, zoo3, table will be readonly too, because it only connect to zoo1
cluster.start_zookeeper_nodes(["zoo2", "zoo3"])
wait_zookeeper_node_to_start(["zoo2", "zoo3"])
node.query("SELECT COUNT() FROM test_table")
with pytest.raises(QueryRuntimeException):
node.query("SELECT COUNT() FROM test_table", settings={"select_sequential_consistency" : 1})
## set config to zoo2, server will be normal
new_config = """
<yandex>
<zookeeper>
<node index="1">
<host>zoo2</host>
<port>2181</port>
</node>
<session_timeout_ms>2000</session_timeout_ms>
</zookeeper>
</yandex>
"""
node.replace_config("/etc/clickhouse-server/conf.d/zookeeper.xml", new_config)
node.query("SYSTEM RELOAD CONFIG")
assert_eq_with_retry(node, "SELECT COUNT() FROM test_table", '1000', retry_count=120, sleep_time=0.5)