ClickHouse/tests/integration/test_replica_is_active/test.py

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import pytest
from helpers.client import QueryRuntimeException
from helpers.cluster import ClickHouseCluster
cluster = ClickHouseCluster(__file__)
node1 = cluster.add_instance('node1', with_zookeeper=True)
node2 = cluster.add_instance('node2', with_zookeeper=True)
node3 = cluster.add_instance('node3', with_zookeeper=True)
@pytest.fixture(scope="module")
def start_cluster():
try:
cluster.start()
for i, node in enumerate((node1, node2, node3)):
node_name = 'node' + str(i + 1)
node.query(
'''
CREATE TABLE test_table(date Date, id UInt32, dummy UInt32)
ENGINE = ReplicatedMergeTree('/clickhouse/tables/test_table', '{}')
PARTITION BY date ORDER BY id
'''.format(node_name)
)
yield cluster
finally:
cluster.shutdown()
def test_replica_is_active(start_cluster):
query_result = node1.query("select replica_is_active from system.replicas where table = 'test_table'")
assert query_result == '{\'node1\':1,\'node2\':1,\'node3\':1}\n'
node3.stop()
query_result = node1.query("select replica_is_active from system.replicas where table = 'test_table'")
assert query_result == '{\'node1\':1,\'node2\':1,\'node3\':0}\n'
node2.stop()
query_result = node1.query("select replica_is_active from system.replicas where table = 'test_table'")
assert query_result == '{\'node1\':1,\'node2\':0,\'node3\':0}\n'