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/**
* Copyright (C) 2022-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/db/repl/tenant_file_importer_service.h"
#include <boost/filesystem.hpp>
#include <fmt/format.h>
#include "mongo/db/catalog/collection_catalog.h"
#include "mongo/db/commands/tenant_migration_recipient_cmds_gen.h"
#include "mongo/db/concurrency/d_concurrency.h"
#include "mongo/db/repl/replication_coordinator.h"
#include "mongo/db/repl/tenant_migration_access_blocker_util.h"
#include "mongo/db/repl/tenant_migration_shard_merge_util.h"
#include "mongo/db/service_context.h"
#include "mongo/db/storage/wiredtiger/wiredtiger_import.h"
#include "mongo/executor/network_interface_factory.h"
#include "mongo/executor/network_interface_thread_pool.h"
#include "mongo/logv2/log.h"
#include "mongo/rpc/get_status_from_command_result.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kTenantMigration
namespace mongo::repl {
using namespace fmt::literals;
using namespace shard_merge_utils;
using namespace tenant_migration_access_blocker;
using executor::NetworkInterface;
using executor::NetworkInterfaceThreadPool;
using executor::TaskExecutor;
using executor::ThreadPoolTaskExecutor;
namespace {
MONGO_FAIL_POINT_DEFINE(skipDeleteTempDBPath);
const auto _TenantFileImporterService =
ServiceContext::declareDecoration<TenantFileImporterService>();
const ReplicaSetAwareServiceRegistry::Registerer<TenantFileImporterService>
_TenantFileImporterServiceRegisterer("TenantFileImporterService");
void importCopiedFiles(OperationContext* opCtx,
const UUID& migrationId,
const StringData& donorConnectionString) {
auto tempWTDirectory = fileClonerTempDir(migrationId);
uassert(6113315,
str::stream() << "Missing file cloner's temporary dbpath directory: "
<< tempWTDirectory.string(),
boost::filesystem::exists(tempWTDirectory));
// TODO SERVER-63204: Evaluate correct place to remove the temporary WT dbpath.
ON_BLOCK_EXIT([&tempWTDirectory, &migrationId] {
// TODO SERVER-63789: Delete skipDeleteTempDBPath failpoint
if (MONGO_unlikely(skipDeleteTempDBPath.shouldFail())) {
LOGV2(6114402,
"skipDeleteTempDBPath failpoint enabled, skipping temp directory cleanup.");
return;
}
LOGV2_INFO(6113324,
"Done importing files, removing the temporary WT dbpath",
"migrationId"_attr = migrationId,
"tempDbPath"_attr = tempWTDirectory.string());
boost::system::error_code ec;
boost::filesystem::remove_all(tempWTDirectory, ec);
});
auto metadatas = wiredTigerRollbackToStableAndGetMetadata(opCtx, tempWTDirectory.string());
for (auto&& m : metadatas) {
auto tenantId = parseTenantIdFromDB(m.ns.db());
if (tenantId == boost::none) {
continue;
}
LOGV2_DEBUG(6114100, 1, "Create recipient access blocker", "tenantId"_attr = tenantId);
addTenantMigrationRecipientAccessBlocker(opCtx->getServiceContext(),
*tenantId,
migrationId,
MigrationProtocolEnum::kShardMerge,
donorConnectionString);
}
wiredTigerImportFromBackupCursor(opCtx, metadatas, tempWTDirectory.string());
auto catalog = CollectionCatalog::get(opCtx);
for (auto&& m : metadatas) {
Lock::CollectionLock systemViewsLock(
opCtx,
NamespaceString(m.ns.db(), NamespaceString::kSystemDotViewsCollectionName),
MODE_X);
uassertStatusOK(catalog->reloadViews(opCtx, TenantDatabaseName(boost::none, m.ns.db())));
}
}
} // namespace
TenantFileImporterService* TenantFileImporterService::get(ServiceContext* serviceContext) {
return &_TenantFileImporterService(serviceContext);
}
void TenantFileImporterService::onStartup(OperationContext*) {
auto net = executor::makeNetworkInterface("TenantFileImporterService-TaskExecutor");
auto pool = std::make_unique<executor::NetworkInterfaceThreadPool>(net.get());
_executor = std::make_shared<ThreadPoolTaskExecutor>(std::move(pool), std::move(net));
_executor->startup();
}
void TenantFileImporterService::startMigration(const UUID& migrationId,
const StringData& donorConnectionString) {
stdx::lock_guard lk(_mutex);
_reset(lk);
_migrationId = migrationId;
_donorConnectionString = donorConnectionString.toString();
_scopedExecutor = std::make_shared<executor::ScopedTaskExecutor>(
_executor,
Status{ErrorCodes::CallbackCanceled, "TenantFileImporterService executor cancelled"});
_state.setState(ImporterState::State::kCopyingFiles);
}
void TenantFileImporterService::learnedFilename(const UUID& migrationId,
const BSONObj& metadataDoc) {
auto opCtx = cc().getOperationContext();
{
stdx::lock_guard lk(_mutex);
uassert(8423347,
"Called learnedFilename with migrationId {}, but {} is active"_format(
migrationId.toString(), _migrationId ? _migrationId->toString() : "(null)"),
migrationId == _migrationId);
}
try {
// TODO (SERVER-62734): Do this work asynchronously on the executor.
cloneFile(opCtx, metadataDoc);
} catch (const DBException& ex) {
LOGV2_ERROR(6229306,
"Error cloning files",
"migrationUUID"_attr = migrationId,
"error"_attr = ex.toStatus());
// TODO (SERVER-63390): On error, vote shard merge abort to recipient primary.
}
}
void TenantFileImporterService::learnedAllFilenames(const UUID& migrationId) {
std::string donorConnectionString;
{
stdx::lock_guard lk(_mutex);
if (!_state.is(ImporterState::State::kCopyingFiles)) {
return;
}
uassert(8423345,
"Called learnedAllFilenames with migrationId {}, but {} is active"_format(
migrationId.toString(), _migrationId ? _migrationId->toString() : "(null)"),
migrationId == _migrationId);
_state.setState(ImporterState::State::kCopiedFiles);
donorConnectionString = _donorConnectionString;
}
auto opCtx = cc().getOperationContext();
// TODO SERVER-63789: Revisit use of AllowLockAcquisitionOnTimestampedUnitOfWork and
// remove if possible.
// No other threads will try to acquire conflicting locks: we are acquiring
// database/collection locks for new tenants.
AllowLockAcquisitionOnTimestampedUnitOfWork allowLockAcquisition(opCtx->lockState());
importCopiedFiles(opCtx, migrationId, donorConnectionString);
// TODO (SERVER-62734): Keep count of files remaining to import, wait before voting.
stdx::lock_guard lk(_mutex);
if (!_state.is(ImporterState::State::kCopiedFiles) || migrationId != _migrationId) {
LOGV2_INFO(6114103,
"Not calling recipientVoteImportedFiles: migration ended",
"currentMigrationId"_attr = _migrationId,
"previousMigrationId"_attr = migrationId);
return;
}
_voteImportedFiles(migrationId, lk);
_state.setState(ImporterState::State::kImportedFiles);
}
void TenantFileImporterService::reset(const UUID& migrationId) {
stdx::lock_guard lk(_mutex);
if (migrationId != _migrationId) {
LOGV2_DEBUG(6114106,
1,
"Ignoring reset for unknown migrationId",
"currentMigrationId"_attr = _migrationId,
"unknownMigrationId"_attr = migrationId);
return;
}
_reset(lk);
}
void TenantFileImporterService::_voteImportedFiles(const UUID& migrationId, WithLock) {
auto replCoord = ReplicationCoordinator::get(getGlobalServiceContext());
// Call the command on the primary (which is self if this node is primary).
auto primary = replCoord->getCurrentPrimaryHostAndPort();
if (primary.empty()) {
LOGV2_WARNING(
6113406,
"No primary for recipientVoteImportedFiles command, cannot continue migration",
"migrationId"_attr = migrationId);
return;
}
RecipientVoteImportedFiles cmd(migrationId, replCoord->getMyHostAndPort(), true /* success */);
executor::RemoteCommandRequest request(primary, "admin", cmd.toBSON({}), nullptr);
request.sslMode = transport::kGlobalSSLMode;
auto scheduleResult =
(*_scopedExecutor)
->scheduleRemoteCommand(
request, [](const executor::TaskExecutor::RemoteCommandCallbackArgs& args) {
if (!args.response.isOK()) {
LOGV2_WARNING(6113405,
"recipientVoteImportedFiles command failed",
"error"_attr = redact(args.response.status));
return;
}
auto status = getStatusFromCommandResult(args.response.data);
if (!status.isOK()) {
LOGV2_WARNING(6113404,
"recipientVoteImportedFiles command failed",
"error"_attr = redact(status));
}
});
if (!scheduleResult.isOK()) {
LOGV2_WARNING(6113403,
"Failed to schedule recipientVoteImportedFiles command on primary",
"status"_attr = scheduleResult.getStatus());
}
}
void TenantFileImporterService::_reset(WithLock) {
_scopedExecutor.reset(); // Shuts down and joins the executor.
_migrationId.reset();
_state.setState(ImporterState::State::kUninitialized);
}
} // namespace mongo::repl
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