ClickHouse/tests/integration/test_keeper_snapshot_small_distance/test.py
Azat Khuzhin 69d23f5e67 Fix all problems in tests that had been found by flake8
Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
2024-06-05 14:46:38 +02:00

221 lines
6.3 KiB
Python

#!/usr/bin/env python3
import pytest
from helpers.cluster import ClickHouseCluster
import helpers.keeper_utils as keeper_utils
from multiprocessing.dummy import Pool
from kazoo.client import KazooClient, KazooRetry
from kazoo.handlers.threading import KazooTimeoutError
import random
import string
import os
import time
cluster = ClickHouseCluster(__file__)
node1 = cluster.add_instance(
"node1", main_configs=["configs/keeper_config1.xml"], stay_alive=True
)
node2 = cluster.add_instance(
"node2", main_configs=["configs/keeper_config2.xml"], stay_alive=True
)
node3 = cluster.add_instance(
"node3", main_configs=["configs/keeper_config3.xml"], stay_alive=True
)
def start_zookeeper(node):
node.exec_in_container(["bash", "-c", "/opt/zookeeper/bin/zkServer.sh start"])
def stop_zookeeper(node):
node.exec_in_container(["bash", "-c", "/opt/zookeeper/bin/zkServer.sh stop"])
timeout = time.time() + 60
while node.get_process_pid("zookeeper") != None:
if time.time() > timeout:
raise Exception("Failed to stop ZooKeeper in 60 secs")
time.sleep(0.2)
def generate_zk_snapshot(node):
for _ in range(100):
stop_zookeeper(node)
start_zookeeper(node)
time.sleep(2)
stop_zookeeper(node)
# get last snapshot
last_snapshot = node.exec_in_container(
[
"bash",
"-c",
"find /zookeeper/version-2 -name 'snapshot.*' -printf '%T@ %p\n' | sort -n | awk 'END {print $2}'",
]
).strip()
print(f"Latest snapshot: {last_snapshot}")
try:
# verify last snapshot
# zkSnapShotToolkit is a tool to inspect generated snapshots - if it's broken, an exception is thrown
node.exec_in_container(
[
"bash",
"-c",
f"/opt/zookeeper/bin/zkSnapShotToolkit.sh {last_snapshot}",
]
)
return
except Exception as err:
print(f"Got error while reading snapshot: {err}")
raise Exception("Failed to generate a ZooKeeper snapshot")
def clear_zookeeper(node):
node.exec_in_container(["bash", "-c", "rm -fr /zookeeper/*"])
def restart_and_clear_zookeeper(node):
stop_zookeeper(node)
clear_zookeeper(node)
start_zookeeper(node)
def restart_zookeeper(node):
stop_zookeeper(node)
start_zookeeper(node)
def clear_clickhouse_data(node):
node.exec_in_container(
[
"bash",
"-c",
"rm -fr /var/lib/clickhouse/coordination/logs/* /var/lib/clickhouse/coordination/snapshots/*",
]
)
def convert_zookeeper_data(node):
node.exec_in_container(
[
"bash",
"-c",
"tar -cvzf /var/lib/clickhouse/zk-data.tar.gz /zookeeper/version-2",
]
)
cmd = "/usr/bin/clickhouse keeper-converter --zookeeper-logs-dir /zookeeper/version-2/ --zookeeper-snapshots-dir /zookeeper/version-2/ --output-dir /var/lib/clickhouse/coordination/snapshots"
node.exec_in_container(["bash", "-c", cmd])
return os.path.join(
"/var/lib/clickhouse/coordination/snapshots",
node.exec_in_container(
["bash", "-c", "ls /var/lib/clickhouse/coordination/snapshots"]
).strip(),
)
def stop_clickhouse(node):
node.stop_clickhouse()
def start_clickhouse(node):
node.start_clickhouse()
keeper_utils.wait_until_connected(cluster, node)
@pytest.fixture(scope="module")
def started_cluster():
try:
cluster.start()
yield cluster
finally:
cluster.shutdown()
def get_fake_zk(node, timeout=30.0):
_fake_zk_instance = KazooClient(
hosts=cluster.get_instance_ip(node.name) + ":9181", timeout=timeout
)
_fake_zk_instance.start()
return _fake_zk_instance
def get_genuine_zk(node, timeout=30.0):
CONNECTION_RETRIES = 100
for i in range(CONNECTION_RETRIES):
try:
_genuine_zk_instance = KazooClient(
hosts=cluster.get_instance_ip(node.name) + ":2181",
timeout=timeout,
connection_retry=KazooRetry(max_tries=20),
)
_genuine_zk_instance.start()
return _genuine_zk_instance
except KazooTimeoutError:
if i == CONNECTION_RETRIES - 1:
raise
print(
"Failed to connect to ZK cluster because of timeout. Restarting cluster and trying again."
)
time.sleep(0.2)
restart_zookeeper(node)
def test_snapshot_and_load(started_cluster):
genuine_connection = None
fake_zks = []
try:
restart_and_clear_zookeeper(node1)
genuine_connection = get_genuine_zk(node1)
for node in [node1, node2, node3]:
print("Stop and clear", node.name, "with dockerid", node.docker_id)
stop_clickhouse(node)
clear_clickhouse_data(node)
for i in range(1000):
genuine_connection.create("/test" + str(i), b"data")
print("Data loaded to zookeeper")
generate_zk_snapshot(node1)
print("Data copied to node1")
resulted_path = convert_zookeeper_data(node1)
print("Resulted path", resulted_path)
for node in [node2, node3]:
print("Copy snapshot from", node1.name, "to", node.name)
cluster.copy_file_from_container_to_container(
node1, resulted_path, node, "/var/lib/clickhouse/coordination/snapshots"
)
print("Starting clickhouses")
p = Pool(3)
result = p.map_async(start_clickhouse, [node1, node2, node3])
result.wait()
print("Loading additional data")
fake_zks = [get_fake_zk(node) for node in [node1, node2, node3]]
for i in range(1000):
fake_zk = random.choice(fake_zks)
try:
fake_zk.create("/test" + str(i + 1000), b"data")
except Exception as ex:
print("Got exception:" + str(ex))
print("Final")
fake_zks[0].create("/test10000", b"data")
finally:
for zk in fake_zks:
if zk:
zk.stop()
zk.close()
if genuine_connection:
genuine_connection.stop()
genuine_connection.close()