ClickHouse/programs/copier/ClusterCopierApp.cpp

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#include "ClusterCopierApp.h"
namespace DB
{
/// ClusterCopierApp
void ClusterCopierApp::initialize(Poco::Util::Application & self)
{
is_help = config().has("help");
if (is_help)
return;
config_xml_path = config().getString("config-file");
task_path = config().getString("task-path");
log_level = config().getString("log-level", "trace");
is_safe_mode = config().has("safe-mode");
if (config().has("copy-fault-probability"))
copy_fault_probability = std::max(std::min(config().getDouble("copy-fault-probability"), 1.0), 0.0);
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if (config().has("move-fault-probability"))
move_fault_probability = std::max(std::min(config().getDouble("move-fault-probability"), 1.0), 0.0);
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base_dir = (config().has("base-dir")) ? config().getString("base-dir") : Poco::Path::current();
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if (config().has("experimental-use-sample-offset"))
experimental_use_sample_offset = config().getBool("experimental-use-sample-offset");
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// process_id is '<hostname>#<start_timestamp>_<pid>'
time_t timestamp = Poco::Timestamp().epochTime();
auto curr_pid = Poco::Process::id();
process_id = std::to_string(DateLUT::instance().toNumYYYYMMDDhhmmss(timestamp)) + "_" + std::to_string(curr_pid);
host_id = escapeForFileName(getFQDNOrHostName()) + '#' + process_id;
process_path = Poco::Path(base_dir + "/clickhouse-copier_" + process_id).absolute().toString();
Poco::File(process_path).createDirectories();
/// Override variables for BaseDaemon
if (config().has("log-level"))
config().setString("logger.level", config().getString("log-level"));
if (config().has("base-dir") || !config().has("logger.log"))
config().setString("logger.log", process_path + "/log.log");
if (config().has("base-dir") || !config().has("logger.errorlog"))
config().setString("logger.errorlog", process_path + "/log.err.log");
Base::initialize(self);
}
void ClusterCopierApp::handleHelp(const std::string &, const std::string &)
{
Poco::Util::HelpFormatter help_formatter(options());
help_formatter.setCommand(commandName());
help_formatter.setHeader("Copies tables from one cluster to another");
help_formatter.setUsage("--config-file <config-file> --task-path <task-path>");
help_formatter.format(std::cerr);
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stopOptionsProcessing();
}
void ClusterCopierApp::defineOptions(Poco::Util::OptionSet & options)
{
Base::defineOptions(options);
options.addOption(Poco::Util::Option("task-path", "", "path to task in ZooKeeper")
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.argument("task-path").binding("task-path"));
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options.addOption(Poco::Util::Option("task-file", "", "path to task file for uploading in ZooKeeper to task-path")
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.argument("task-file").binding("task-file"));
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options.addOption(Poco::Util::Option("task-upload-force", "", "Force upload task-file even node already exists")
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.argument("task-upload-force").binding("task-upload-force"));
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options.addOption(Poco::Util::Option("safe-mode", "", "disables ALTER DROP PARTITION in case of errors")
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.binding("safe-mode"));
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options.addOption(Poco::Util::Option("copy-fault-probability", "", "the copying fails with specified probability (used to test partition state recovering)")
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.argument("copy-fault-probability").binding("copy-fault-probability"));
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options.addOption(Poco::Util::Option("move-fault-probability", "", "the moving fails with specified probability (used to test partition state recovering)")
.argument("move-fault-probability").binding("move-fault-probability"));
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options.addOption(Poco::Util::Option("log-level", "", "sets log level")
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.argument("log-level").binding("log-level"));
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options.addOption(Poco::Util::Option("base-dir", "", "base directory for copiers, consecutive copier launches will populate /base-dir/launch_id/* directories")
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.argument("base-dir").binding("base-dir"));
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options.addOption(Poco::Util::Option("experimental-use-sample-offset", "", "Use SAMPLE OFFSET query instead of cityHash64(PRIMARY KEY) % n == k")
.argument("experimental-use-sample-offset").binding("experimental-use-sample-offset"));
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using Me = std::decay_t<decltype(*this)>;
options.addOption(Poco::Util::Option("help", "", "produce this help message").binding("help")
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.callback(Poco::Util::OptionCallback<Me>(this, &Me::handleHelp)));
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}
void ClusterCopierApp::mainImpl()
{
StatusFile status_file(process_path + "/status");
ThreadStatus thread_status;
auto log = &logger();
LOG_INFO(log, "Starting clickhouse-copier ("
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<< "id " << process_id << ", "
<< "host_id " << host_id << ", "
<< "path " << process_path << ", "
<< "revision " << ClickHouseRevision::get() << ")");
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SharedContextHolder shared_context = Context::createShared();
auto context = std::make_unique<Context>(Context::createGlobal(shared_context.get()));
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context->makeGlobalContext();
SCOPE_EXIT(context->shutdown());
context->setConfig(loaded_config.configuration);
context->setApplicationType(Context::ApplicationType::LOCAL);
context->setPath(process_path);
registerFunctions();
registerAggregateFunctions();
registerTableFunctions();
registerStorages();
registerDictionaries();
registerDisks();
static const std::string default_database = "_local";
DatabaseCatalog::instance().attachDatabase(default_database, std::make_shared<DatabaseMemory>(default_database));
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context->setCurrentDatabase(default_database);
/// Initialize query scope just in case.
CurrentThread::QueryScope query_scope(*context);
auto copier = std::make_unique<ClusterCopier>(task_path, host_id, default_database, *context);
copier->setSafeMode(is_safe_mode);
copier->setCopyFaultProbability(copy_fault_probability);
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copier->setMoveFaultProbability(move_fault_probability);
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copier->setExperimentalUseSampleOffset(experimental_use_sample_offset);
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auto task_file = config().getString("task-file", "");
if (!task_file.empty())
copier->uploadTaskDescription(task_path, task_file, config().getBool("task-upload-force", false));
copier->init();
copier->process(ConnectionTimeouts::getTCPTimeoutsWithoutFailover(context->getSettingsRef()));
/// Reset ZooKeeper before removing ClusterCopier.
/// Otherwise zookeeper watch can call callback which use already removed ClusterCopier object.
context->resetZooKeeper();
}
int ClusterCopierApp::main(const std::vector<std::string> &)
{
if (is_help)
return 0;
try
{
mainImpl();
}
catch (...)
{
tryLogCurrentException(&Poco::Logger::root(), __PRETTY_FUNCTION__);
auto code = getCurrentExceptionCode();
return (code) ? code : -1;
}
return 0;
}
}
#pragma GCC diagnostic ignored "-Wunused-function"
#pragma GCC diagnostic ignored "-Wmissing-declarations"
int mainEntryClickHouseClusterCopier(int argc, char ** argv)
{
try
{
DB::ClusterCopierApp app;
return app.run(argc, argv);
}
catch (...)
{
std::cerr << DB::getCurrentExceptionMessage(true) << "\n";
auto code = DB::getCurrentExceptionCode();
return (code) ? code : -1;
}
}