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188 lines
8.3 KiB
Python
188 lines
8.3 KiB
Python
import time
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import pytest
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import subprocess
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from helpers.cluster import ClickHouseCluster
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from helpers.test_tools import assert_eq_with_retry
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from helpers.client import QueryRuntimeException
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from helpers.test_tools import TSV
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cluster = ClickHouseCluster(__file__)
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def _fill_nodes(nodes, table_name):
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for node in nodes:
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node.query(
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'''
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CREATE DATABASE IF NOT EXISTS test;
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CREATE TABLE IF NOT EXISTS {0}(date Date, id UInt32)
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ENGINE = ReplicatedMergeTree('/clickhouse/tables/test/{0}', '{1}')
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ORDER BY id PARTITION BY toYYYYMM(date);
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'''.format(table_name, node.name)
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)
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node1 = cluster.add_instance('node1', main_configs=['configs/listen_host.xml'], with_zookeeper=True, ipv6_address='2001:3984:3989::1:1111')
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node2 = cluster.add_instance('node2', main_configs=['configs/listen_host.xml', 'configs/dns_update_long.xml'],
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with_zookeeper=True, ipv6_address='2001:3984:3989::1:1112')
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@pytest.fixture(scope="module")
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def cluster_without_dns_cache_update():
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try:
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cluster.start()
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_fill_nodes([node1, node2], 'test_table_drop')
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yield cluster
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except Exception as ex:
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print ex
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finally:
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cluster.shutdown()
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pass
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# node1 is a source, node2 downloads data
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# node2 has long dns_cache_update_period, so dns cache update wouldn't work
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def test_ip_change_drop_dns_cache(cluster_without_dns_cache_update):
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# First we check, that normal replication works
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node1.query("INSERT INTO test_table_drop VALUES ('2018-10-01', 1), ('2018-10-02', 2), ('2018-10-03', 3)")
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assert node1.query("SELECT count(*) from test_table_drop") == "3\n"
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assert_eq_with_retry(node2, "SELECT count(*) from test_table_drop", "3")
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# We change source node ip
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cluster.restart_instance_with_ip_change(node1, "2001:3984:3989::1:7777")
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# Put some data to source node1
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node1.query("INSERT INTO test_table_drop VALUES ('2018-10-01', 5), ('2018-10-02', 6), ('2018-10-03', 7)")
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# Check that data is placed on node1
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assert node1.query("SELECT count(*) from test_table_drop") == "6\n"
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# Because of DNS cache dest node2 cannot download data from node1
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with pytest.raises(Exception):
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assert_eq_with_retry(node2, "SELECT count(*) from test_table_drop", "6")
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# drop DNS cache
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node2.query("SYSTEM DROP DNS CACHE")
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# Data is downloaded
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assert_eq_with_retry(node2, "SELECT count(*) from test_table_drop", "6")
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# Just to be sure check one more time
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node1.query("INSERT INTO test_table_drop VALUES ('2018-10-01', 8)")
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assert node1.query("SELECT count(*) from test_table_drop") == "7\n"
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assert_eq_with_retry(node2, "SELECT count(*) from test_table_drop", "7")
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node3 = cluster.add_instance('node3', main_configs=['configs/listen_host.xml'],
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with_zookeeper=True, ipv6_address='2001:3984:3989::1:1113')
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node4 = cluster.add_instance('node4', main_configs=['configs/remote_servers.xml', 'configs/listen_host.xml', 'configs/dns_update_short.xml'],
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with_zookeeper=True, ipv6_address='2001:3984:3989::1:1114')
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@pytest.fixture(scope="module")
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def cluster_with_dns_cache_update():
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try:
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cluster.start()
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_fill_nodes([node3, node4], 'test_table_update')
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yield cluster
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except Exception as ex:
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print ex
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finally:
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cluster.shutdown()
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pass
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# node3 is a source, node4 downloads data
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# node4 has short dns_cache_update_period, so testing update of dns cache
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def test_ip_change_update_dns_cache(cluster_with_dns_cache_update):
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# First we check, that normal replication works
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node3.query("INSERT INTO test_table_update VALUES ('2018-10-01', 1), ('2018-10-02', 2), ('2018-10-03', 3)")
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assert node3.query("SELECT count(*) from test_table_update") == "3\n"
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assert_eq_with_retry(node4, "SELECT count(*) from test_table_update", "3")
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# We change source node ip
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cluster.restart_instance_with_ip_change(node3, "2001:3984:3989::1:8888")
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# Put some data to source node3
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node3.query("INSERT INTO test_table_update VALUES ('2018-10-01', 5), ('2018-10-02', 6), ('2018-10-03', 7)")
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# Check that data is placed on node3
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assert node3.query("SELECT count(*) from test_table_update") == "6\n"
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curl_result = node4.exec_in_container(["bash", "-c", "curl -s 'node3:8123'"])
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assert curl_result == 'Ok.\n'
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cat_resolv = node4.exec_in_container(["bash", "-c", "cat /etc/resolv.conf"])
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print("RESOLV {}".format(cat_resolv))
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assert_eq_with_retry(node4, "SELECT * FROM remote('node3', 'system', 'one')", "0", sleep_time=0.5)
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# Because of DNS cache update, ip of node3 would be updated
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assert_eq_with_retry(node4, "SELECT count(*) from test_table_update", "6", sleep_time=3)
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# Just to be sure check one more time
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node3.query("INSERT INTO test_table_update VALUES ('2018-10-01', 8)")
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assert node3.query("SELECT count(*) from test_table_update") == "7\n"
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assert_eq_with_retry(node4, "SELECT count(*) from test_table_update", "7")
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def set_hosts(node, hosts):
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new_content = '\\n'.join(['127.0.0.1 localhost', '::1 localhost'] + hosts)
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node.exec_in_container(['bash', '-c', 'echo -e "{}" > /etc/hosts'.format(new_content)], privileged=True, user='root')
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def test_dns_cache_update(cluster_with_dns_cache_update):
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set_hosts(node4, ['127.255.255.255 lost_host'])
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with pytest.raises(QueryRuntimeException):
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node4.query("SELECT * FROM remote('lost_host', 'system', 'one')")
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node4.query("CREATE TABLE distributed_lost_host (dummy UInt8) ENGINE = Distributed(lost_host_cluster, 'system', 'one')")
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with pytest.raises(QueryRuntimeException):
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node4.query("SELECT * FROM distributed_lost_host")
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set_hosts(node4, ['127.0.0.1 lost_host'])
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# Wait a bit until dns cache will be updated
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assert_eq_with_retry(node4, "SELECT * FROM remote('lost_host', 'system', 'one')", "0")
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assert_eq_with_retry(node4, "SELECT * FROM distributed_lost_host", "0")
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assert TSV(node4.query("SELECT DISTINCT host_name, host_address FROM system.clusters WHERE cluster='lost_host_cluster'")) == TSV("lost_host\t127.0.0.1\n")
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assert TSV(node4.query("SELECT hostName()")) == TSV("node4")
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# Check SYSTEM DROP DNS CACHE on node5 and background cache update on node6
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node5 = cluster.add_instance('node5', main_configs=['configs/listen_host.xml', 'configs/dns_update_long.xml'],
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user_configs=['configs/users_with_hostname.xml'], ipv6_address='2001:3984:3989::1:1115')
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node6 = cluster.add_instance('node6', main_configs=['configs/listen_host.xml', 'configs/dns_update_short.xml'],
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user_configs=['configs/users_with_hostname.xml'], ipv6_address='2001:3984:3989::1:1116')
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@pytest.mark.parametrize("node", [node5, node6])
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def test_user_access_ip_change(cluster_with_dns_cache_update, node):
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node_name = node.name
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node_num = node.name[-1]
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# getaddrinfo(...) may hang for a log time without this options
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node.exec_in_container(['bash', '-c', 'echo -e "options timeout:1\noptions attempts:2" >> /etc/resolv.conf'], privileged=True, user='root')
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assert node3.query("SELECT * FROM remote('{}', 'system', 'one')".format(node_name)) == "0\n"
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assert node4.query("SELECT * FROM remote('{}', 'system', 'one')".format(node_name)) == "0\n"
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set_hosts(node, ['127.255.255.255 node3', '2001:3984:3989::1:88{}4 unknown_host'.format(node_num)])
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cluster.restart_instance_with_ip_change(node3, "2001:3984:3989::1:88{}3".format(node_num))
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cluster.restart_instance_with_ip_change(node4, "2001:3984:3989::1:88{}4".format(node_num))
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with pytest.raises(QueryRuntimeException):
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node3.query("SELECT * FROM remote('{}', 'system', 'one')".format(node_name))
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with pytest.raises(QueryRuntimeException):
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node4.query("SELECT * FROM remote('{}', 'system', 'one')".format(node_name))
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# now wrong addresses are cached
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set_hosts(node, [])
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retry_count = 60
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if node_name == 'node5':
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# client is not allowed to connect, so execute it directly in container to send query from localhost
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node.exec_in_container(['bash', '-c', 'clickhouse client -q "SYSTEM DROP DNS CACHE"'], privileged=True, user='root')
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retry_count = 1
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assert_eq_with_retry(node3, "SELECT * FROM remote('{}', 'system', 'one')".format(node_name), "0", retry_count=retry_count, sleep_time=1)
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assert_eq_with_retry(node4, "SELECT * FROM remote('{}', 'system', 'one')".format(node_name), "0", retry_count=retry_count, sleep_time=1)
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