ClickHouse/tests/integration/test_system_metrics/test.py

import time

import pytest
from helpers.cluster import ClickHouseCluster
from helpers.test_tools import assert_eq_with_retry
from helpers.network import PartitionManager


def fill_nodes(nodes, shard):
    for node in nodes:
        node.query(
            """
                CREATE DATABASE test;

                CREATE TABLE test.test_table(date Date, id UInt32)
                ENGINE = ReplicatedMergeTree('/clickhouse/tables/test{shard}/replicated', '{replica}') ORDER BY id PARTITION BY toYYYYMM(date) SETTINGS min_replicated_logs_to_keep=3, max_replicated_logs_to_keep=5, cleanup_delay_period=0, cleanup_delay_period_random_add=0;
            """.format(
                shard=shard, replica=node.name
            )
        )


cluster = ClickHouseCluster(__file__)
node1 = cluster.add_instance(
    "node1", main_configs=["configs/remote_servers.xml"], with_zookeeper=True
)
node2 = cluster.add_instance(
    "node2", main_configs=["configs/remote_servers.xml"], with_zookeeper=True
)


@pytest.fixture(scope="module")
def start_cluster():
    try:
        cluster.start()

        fill_nodes([node1, node2], 1)

        yield cluster

    except Exception as ex:
        print(ex)

    finally:
        cluster.shutdown()


def test_readonly_metrics(start_cluster):
    assert (
        node1.query("SELECT value FROM system.metrics WHERE metric = 'ReadonlyReplica'")
        == "0\n"
    )

    with PartitionManager() as pm:
        ## make node1 readonly -> heal -> readonly -> heal -> detach table -> heal -> attach table
        pm.drop_instance_zk_connections(node1)
        assert_eq_with_retry(
            node1,
            "SELECT value FROM system.metrics WHERE metric = 'ReadonlyReplica'",
            "1\n",
            retry_count=300,
            sleep_time=1,
        )

        pm.heal_all()
        assert_eq_with_retry(
            node1,
            "SELECT value FROM system.metrics WHERE metric = 'ReadonlyReplica'",
            "0\n",
            retry_count=300,
            sleep_time=1,
        )

        pm.drop_instance_zk_connections(node1)
        assert_eq_with_retry(
            node1,
            "SELECT value FROM system.metrics WHERE metric = 'ReadonlyReplica'",
            "1\n",
            retry_count=300,
            sleep_time=1,
        )

        node1.query("DETACH TABLE test.test_table")
        assert "0\n" == node1.query(
            "SELECT value FROM system.metrics WHERE metric = 'ReadonlyReplica'"
        )

        pm.heal_all()
        node1.query("ATTACH TABLE test.test_table")
        assert_eq_with_retry(
            node1,
            "SELECT value FROM system.metrics WHERE metric = 'ReadonlyReplica'",
            "0\n",
            retry_count=300,
            sleep_time=1,
        )


# For LowCardinality-columns, the bytes for N rows is not N*size of 1 row.
def test_metrics_storage_buffer_size(start_cluster):
    node1.query(
        """
        CREATE TABLE test.test_mem_table
        (
            `str` LowCardinality(String)
        )
        ENGINE = Memory;

        CREATE TABLE test.buffer_table
        (
            `str` LowCardinality(String)
        )
        ENGINE = Buffer('test', 'test_mem_table', 1, 600, 600, 1000, 100000, 100000, 10000000);
    """
    )

    # before flush
    node1.query("INSERT INTO test.buffer_table VALUES('hello');")
    assert (
        node1.query(
            "SELECT value FROM system.metrics WHERE metric = 'StorageBufferRows'"
        )
        == "1\n"
    )
    assert (
        node1.query(
            "SELECT value FROM system.metrics WHERE metric = 'StorageBufferBytes'"
        )
        == "24\n"
    )

    node1.query("INSERT INTO test.buffer_table VALUES('hello');")
    assert (
        node1.query(
            "SELECT value FROM system.metrics WHERE metric = 'StorageBufferRows'"
        )
        == "2\n"
    )
    assert (
        node1.query(
            "SELECT value FROM system.metrics WHERE metric = 'StorageBufferBytes'"
        )
        == "25\n"
    )

    # flush
    node1.query("OPTIMIZE TABLE test.buffer_table")
    assert (
        node1.query(
            "SELECT value FROM system.metrics WHERE metric = 'StorageBufferRows'"
        )
        == "0\n"
    )
    assert (
        node1.query(
            "SELECT value FROM system.metrics WHERE metric = 'StorageBufferBytes'"
        )
        == "0\n"
    )