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Merge pull request #21685 from Avogar/reload-cluster-config
Update clusters only if their configs were updated
This commit is contained in:
Anton Popov
GitHub
commit
840417c957
@ -26,6 +26,10 @@ bool isSameConfiguration(const Poco::Util::AbstractConfiguration & left, const P
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return isSameConfiguration(left, String(), right, String());
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}
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bool isSameConfiguration(const Poco::Util::AbstractConfiguration & left, const Poco::Util::AbstractConfiguration & right, const String & key)
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{
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return isSameConfiguration(left, key, right, key);
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}
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bool isSameConfiguration(const Poco::Util::AbstractConfiguration & left, const String & left_key,
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const Poco::Util::AbstractConfiguration & right, const String & right_key)
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@ -13,6 +13,11 @@ namespace DB
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bool isSameConfiguration(const Poco::Util::AbstractConfiguration & left,
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const Poco::Util::AbstractConfiguration & right);
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/// Returns true if the specified subview of the two configurations contains the same keys and values.
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bool isSameConfiguration(const Poco::Util::AbstractConfiguration & left,
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const Poco::Util::AbstractConfiguration & right,
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const String & key);
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/// Returns true if specified subviews of the two configurations contains the same keys and values.
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bool isSameConfiguration(const Poco::Util::AbstractConfiguration & left, const String & left_key,
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const Poco::Util::AbstractConfiguration & right, const String & right_key);
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@ -5,6 +5,7 @@
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#include <Common/isLocalAddress.h>
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#include <Common/StringUtils/StringUtils.h>
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#include <Common/parseAddress.h>
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#include <Common/Config/AbstractConfigurationComparison.h>
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#include <Core/Settings.h>
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#include <IO/WriteHelpers.h>
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#include <IO/ReadHelpers.h>
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@ -265,20 +266,45 @@ void Clusters::setCluster(const String & cluster_name, const std::shared_ptr<Clu
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}
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void Clusters::updateClusters(const Poco::Util::AbstractConfiguration & config, const Settings & settings, const String & config_prefix)
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void Clusters::updateClusters(const Poco::Util::AbstractConfiguration & new_config, const Settings & settings, const String & config_prefix, Poco::Util::AbstractConfiguration * old_config)
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{
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Poco::Util::AbstractConfiguration::Keys config_keys;
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config.keys(config_prefix, config_keys);
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Poco::Util::AbstractConfiguration::Keys new_config_keys;
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new_config.keys(config_prefix, new_config_keys);
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/// If old config is set, we will update only clusters with updated config.
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/// In this case, we first need to find clusters that were deleted from config.
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Poco::Util::AbstractConfiguration::Keys deleted_keys;
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if (old_config)
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{
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std::sort(new_config_keys.begin(), new_config_keys.end());
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Poco::Util::AbstractConfiguration::Keys old_config_keys;
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old_config->keys(config_prefix, old_config_keys);
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std::sort(old_config_keys.begin(), old_config_keys.end());
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std::set_difference(
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old_config_keys.begin(), old_config_keys.end(), new_config_keys.begin(), new_config_keys.end(), std::back_inserter(deleted_keys));
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}
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std::lock_guard lock(mutex);
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impl.clear();
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for (const auto & key : config_keys)
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/// If old congig is set, remove deleted clusters from impl, otherwise just clear it.
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if (old_config)
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{
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for (const auto & key : deleted_keys)
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impl.erase(key);
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}
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else
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impl.clear();
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for (const auto & key : new_config_keys)
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{
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if (key.find('.') != String::npos)
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throw Exception("Cluster names with dots are not supported: '" + key + "'", ErrorCodes::SYNTAX_ERROR);
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impl.emplace(key, std::make_shared<Cluster>(config, settings, config_prefix, key));
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/// If old config is set and cluster config wasn't changed, don't update this cluster.
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if (!old_config || !isSameConfiguration(new_config, *old_config, config_prefix + "." + key))
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impl[key] = std::make_shared<Cluster>(new_config, settings, config_prefix, key);
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}
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}
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@ -276,7 +276,7 @@ public:
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ClusterPtr getCluster(const std::string & cluster_name) const;
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void setCluster(const String & cluster_name, const ClusterPtr & cluster);
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void updateClusters(const Poco::Util::AbstractConfiguration & config, const Settings & settings, const String & config_prefix);
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void updateClusters(const Poco::Util::AbstractConfiguration & new_config, const Settings & settings, const String & config_prefix, Poco::Util::AbstractConfiguration * old_config = nullptr);
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public:
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using Impl = std::map<String, ClusterPtr>;
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@ -60,6 +60,7 @@
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#include <Parsers/parseQuery.h>
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#include <Common/StackTrace.h>
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#include <Common/Config/ConfigProcessor.h>
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#include <Common/Config/AbstractConfigurationComparison.h>
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#include <Common/ZooKeeper/ZooKeeper.h>
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#include <Common/ShellCommand.h>
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#include <Common/TraceCollector.h>
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@ -1833,12 +1834,17 @@ void Context::setClustersConfig(const ConfigurationPtr & config, const String &
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{
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std::lock_guard lock(shared->clusters_mutex);
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/// Do not update clusters if this part of config wasn't changed.
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if (shared->clusters && isSameConfiguration(*config, *shared->clusters_config, config_name))
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return;
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auto old_clusters_config = shared->clusters_config;
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shared->clusters_config = config;
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if (!shared->clusters)
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shared->clusters = std::make_unique<Clusters>(*shared->clusters_config, settings, config_name);
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else
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shared->clusters->updateClusters(*shared->clusters_config, settings, config_name);
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shared->clusters->updateClusters(*shared->clusters_config, settings, config_name, old_clusters_config);
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}
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@ -0,0 +1,30 @@
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<yandex>
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<remote_servers>
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<test_cluster>
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<shard>
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<internal_replication>true</internal_replication>
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<replica>
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<host>node_1</host>
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<port>9000</port>
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</replica>
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<replica>
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<host>node_2</host>
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<port>9000</port>
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</replica>
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</shard>
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</test_cluster>
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<test_cluster2>
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<shard>
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<internal_replication>true</internal_replication>
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<replica>
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<host>node_1</host>
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<port>9000</port>
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</replica>
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<replica>
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<host>node_2</host>
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<port>9000</port>
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</replica>
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</shard>
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</test_cluster2>
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</remote_servers>
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</yandex>
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235
tests/integration/test_reload_clusters_config/test.py
Normal file
235
tests/integration/test_reload_clusters_config/test.py
Normal file
@ -0,0 +1,235 @@
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import os
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import sys
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import time
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import pytest
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sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
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from helpers.cluster import ClickHouseCluster
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from helpers.network import PartitionManager
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from helpers.test_tools import TSV
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cluster = ClickHouseCluster(__file__)
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node = cluster.add_instance('node', with_zookeeper=True, main_configs=['configs/remote_servers.xml'])
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node_1 = cluster.add_instance('node_1', with_zookeeper=True)
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node_2 = cluster.add_instance('node_2', with_zookeeper=True)
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@pytest.fixture(scope="module")
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def started_cluster():
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try:
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cluster.start()
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node.query('''CREATE TABLE distributed (id UInt32) ENGINE =
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Distributed('test_cluster', 'default', 'replicated')''')
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node.query('''CREATE TABLE distributed2 (id UInt32) ENGINE =
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Distributed('test_cluster2', 'default', 'replicated')''')
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cluster.pause_container('node_1')
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cluster.pause_container('node_2')
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yield cluster
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finally:
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cluster.shutdown()
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base_config = '''
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<yandex>
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<remote_servers>
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<test_cluster>
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<shard>
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<internal_replication>true</internal_replication>
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<replica>
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<host>node_1</host>
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<port>9000</port>
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</replica>
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<replica>
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<host>node_2</host>
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<port>9000</port>
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</replica>
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</shard>
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</test_cluster>
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<test_cluster2>
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<shard>
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<internal_replication>true</internal_replication>
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<replica>
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<host>node_1</host>
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<port>9000</port>
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</replica>
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<replica>
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<host>node_2</host>
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<port>9000</port>
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</replica>
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</shard>
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</test_cluster2>
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</remote_servers>
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</yandex>
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'''
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test_config1 = '''
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<yandex>
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<remote_servers>
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<test_cluster>
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<shard>
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<internal_replication>true</internal_replication>
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<replica>
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<host>node_1</host>
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<port>9000</port>
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</replica>
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</shard>
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</test_cluster>
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<test_cluster2>
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<shard>
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<internal_replication>true</internal_replication>
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<replica>
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<host>node_1</host>
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<port>9000</port>
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</replica>
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<replica>
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<host>node_2</host>
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<port>9000</port>
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</replica>
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</shard>
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</test_cluster2>
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</remote_servers>
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</yandex>
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'''
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test_config2 = '''
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<yandex>
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<remote_servers>
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<test_cluster>
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<shard>
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<internal_replication>true</internal_replication>
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<replica>
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<host>node_1</host>
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<port>9000</port>
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</replica>
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<replica>
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<host>node_2</host>
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<port>9000</port>
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</replica>
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</shard>
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</test_cluster>
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</remote_servers>
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</yandex>
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'''
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test_config3 = '''
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<yandex>
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<remote_servers>
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<test_cluster>
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<shard>
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<internal_replication>true</internal_replication>
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<replica>
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<host>node_1</host>
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<port>9000</port>
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</replica>
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<replica>
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<host>node_2</host>
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<port>9000</port>
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</replica>
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</shard>
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</test_cluster>
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<test_cluster2>
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<shard>
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<internal_replication>true</internal_replication>
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<replica>
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<host>node_1</host>
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<port>9000</port>
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</replica>
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<replica>
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<host>node_2</host>
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<port>9000</port>
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</replica>
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</shard>
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</test_cluster2>
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<test_cluster3>
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<shard>
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<internal_replication>true</internal_replication>
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<replica>
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<host>node_1</host>
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<port>9000</port>
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</replica>
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</shard>
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</test_cluster3>
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</remote_servers>
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</yandex>
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'''
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def send_repeated_query(table, count=5):
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for i in range(count):
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node.query_and_get_error("SELECT count() FROM {} SETTINGS receive_timeout=1".format(table))
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def get_errors_count(cluster, host_name="node_1"):
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return int(node.query("SELECT errors_count FROM system.clusters WHERE cluster='{}' and host_name='{}'".format(cluster, host_name)))
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def set_config(config):
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node.replace_config("/etc/clickhouse-server/config.d/remote_servers.xml", config)
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node.query("SYSTEM RELOAD CONFIG")
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def test_simple_reload(started_cluster):
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send_repeated_query("distributed")
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assert get_errors_count("test_cluster") > 0
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node.query("SYSTEM RELOAD CONFIG")
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assert get_errors_count("test_cluster") > 0
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def test_update_one_cluster(started_cluster):
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send_repeated_query("distributed")
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send_repeated_query("distributed2")
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assert get_errors_count("test_cluster") > 0
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assert get_errors_count("test_cluster2") > 0
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set_config(test_config1)
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assert get_errors_count("test_cluster") == 0
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assert get_errors_count("test_cluster2") > 0
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set_config(base_config)
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def test_delete_cluster(started_cluster):
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send_repeated_query("distributed")
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send_repeated_query("distributed2")
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assert get_errors_count("test_cluster") > 0
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assert get_errors_count("test_cluster2") > 0
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set_config(test_config2)
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assert get_errors_count("test_cluster") > 0
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result = node.query("SELECT * FROM system.clusters WHERE cluster='test_cluster2'")
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assert result == ''
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set_config(base_config)
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def test_add_cluster(started_cluster):
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send_repeated_query("distributed")
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send_repeated_query("distributed2")
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assert get_errors_count("test_cluster") > 0
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assert get_errors_count("test_cluster2") > 0
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set_config(test_config3)
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assert get_errors_count("test_cluster") > 0
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assert get_errors_count("test_cluster2") > 0
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result = node.query("SELECT * FROM system.clusters WHERE cluster='test_cluster3'")
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assert result != ''
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set_config(base_config)
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