ClickHouse/tests/integration/test_system_clusters_actual_information/test.py

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import os
import sys
import time
import pytest
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
from helpers.cluster import ClickHouseCluster
from helpers.network import PartitionManager
cluster = ClickHouseCluster(__file__)
node = cluster.add_instance('node', with_zookeeper=True, main_configs=['configs/remote_servers.xml'])
node_1 = cluster.add_instance('node_1', with_zookeeper=True)
@pytest.fixture(scope="module")
def started_cluster():
try:
cluster.start()
node_1.query('''CREATE TABLE replicated (id UInt32, date Date) ENGINE =
ReplicatedMergeTree('/clickhouse/tables/replicated', 'node_1') ORDER BY id PARTITION BY toYYYYMM(date)''')
node.query("CREATE TABLE distributed (id UInt32, date Date) ENGINE = Distributed('test_cluster', 'default', 'replicated')")
yield cluster
finally:
cluster.shutdown()
def test(started_cluster):
cluster.pause_container("node_1")
node.query("SYSTEM RELOAD CONFIG")
node.query_and_get_error("SELECT count() FROM distributed SETTINGS receive_timeout=1")
result = node.query("SELECT errors_count, estimated_recovery_time FROM system.clusters WHERE cluster='test_cluster' and host_name='node_1'")
errors_count, recovery_time = map(int, result.split())
assert errors_count == 3
while True:
time.sleep(1)
result = node.query("SELECT errors_count, estimated_recovery_time FROM system.clusters WHERE cluster='test_cluster' and host_name='node_1'")
prev_time = recovery_time
errors_count, recovery_time = map(int, result.split())
if recovery_time == 0:
break
assert recovery_time < prev_time
assert errors_count > 0
assert recovery_time == 0
assert errors_count == 0
cluster.unpause_container("node_1")