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db.cpp
1392 lines (1194 loc) · 59.1 KB
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db.cpp
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/**
* Copyright (C) 2016 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kStorage
#include "mongo/platform/basic.h"
#include "mongo/db/dbmain.h"
#include <boost/filesystem/operations.hpp>
#include <boost/optional.hpp>
#include <fstream>
#include <iostream>
#include <limits>
#include <signal.h>
#include <string>
#include "mongo/base/checked_cast.h"
#include "mongo/base/init.h"
#include "mongo/base/initializer.h"
#include "mongo/base/status.h"
#include "mongo/client/replica_set_monitor.h"
#include "mongo/config.h"
#include "mongo/db/audit.h"
#include "mongo/db/auth/authorization_manager.h"
#include "mongo/db/auth/authorization_manager_global.h"
#include "mongo/db/catalog/collection.h"
#include "mongo/db/catalog/create_collection.h"
#include "mongo/db/catalog/database.h"
#include "mongo/db/catalog/database_catalog_entry.h"
#include "mongo/db/catalog/database_holder.h"
#include "mongo/db/catalog/health_log.h"
#include "mongo/db/catalog/index_catalog.h"
#include "mongo/db/catalog/index_key_validate.h"
#include "mongo/db/catalog/uuid_catalog.h"
#include "mongo/db/client.h"
#include "mongo/db/clientcursor.h"
#include "mongo/db/commands/feature_compatibility_version.h"
#include "mongo/db/concurrency/d_concurrency.h"
#include "mongo/db/concurrency/lock_state.h"
#include "mongo/db/concurrency/write_conflict_exception.h"
#include "mongo/db/db_raii.h"
#include "mongo/db/dbdirectclient.h"
#include "mongo/db/dbhelpers.h"
#include "mongo/db/dbmessage.h"
#include "mongo/db/exec/working_set_common.h"
#include "mongo/db/ftdc/ftdc_mongod.h"
#include "mongo/db/index_names.h"
#include "mongo/db/index_rebuilder.h"
#include "mongo/db/initialize_server_global_state.h"
#include "mongo/db/initialize_snmp.h"
#include "mongo/db/introspect.h"
#include "mongo/db/json.h"
#include "mongo/db/keys_collection_client_direct.h"
#include "mongo/db/keys_collection_client_sharded.h"
#include "mongo/db/keys_collection_manager.h"
#include "mongo/db/kill_sessions.h"
#include "mongo/db/kill_sessions_local.h"
#include "mongo/db/log_process_details.h"
#include "mongo/db/logical_clock.h"
#include "mongo/db/logical_session_cache.h"
#include "mongo/db/logical_session_cache_factory_mongod.h"
#include "mongo/db/logical_time_metadata_hook.h"
#include "mongo/db/logical_time_validator.h"
#include "mongo/db/mongod_options.h"
#include "mongo/db/op_observer_impl.h"
#include "mongo/db/op_observer_registry.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/query/internal_plans.h"
#include "mongo/db/repair_database.h"
#include "mongo/db/repl/drop_pending_collection_reaper.h"
#include "mongo/db/repl/oplog.h"
#include "mongo/db/repl/repl_settings.h"
#include "mongo/db/repl/replication_consistency_markers_impl.h"
#include "mongo/db/repl/replication_coordinator_external_state_impl.h"
#include "mongo/db/repl/replication_coordinator_global.h"
#include "mongo/db/repl/replication_coordinator_impl.h"
#include "mongo/db/repl/replication_process.h"
#include "mongo/db/repl/replication_recovery.h"
#include "mongo/db/repl/storage_interface_impl.h"
#include "mongo/db/repl/topology_coordinator.h"
#include "mongo/db/s/balancer/balancer.h"
#include "mongo/db/s/sharded_connection_info.h"
#include "mongo/db/s/sharding_initialization_mongod.h"
#include "mongo/db/s/sharding_state.h"
#include "mongo/db/s/sharding_state_recovery.h"
#include "mongo/db/s/type_shard_identity.h"
#include "mongo/db/server_options.h"
#include "mongo/db/server_parameters.h"
#include "mongo/db/service_context.h"
#include "mongo/db/service_context_d.h"
#include "mongo/db/service_entry_point_mongod.h"
#include "mongo/db/session_catalog.h"
#include "mongo/db/session_killer.h"
#include "mongo/db/startup_warnings_mongod.h"
#include "mongo/db/stats/counters.h"
#include "mongo/db/storage/encryption_hooks.h"
#include "mongo/db/storage/mmap_v1/mmap_v1_options.h"
#include "mongo/db/storage/storage_engine.h"
#include "mongo/db/storage/storage_options.h"
#include "mongo/db/system_index.h"
#include "mongo/db/ttl.h"
#include "mongo/db/wire_version.h"
#include "mongo/executor/network_connection_hook.h"
#include "mongo/executor/network_interface_factory.h"
#include "mongo/executor/network_interface_thread_pool.h"
#include "mongo/executor/thread_pool_task_executor.h"
#include "mongo/platform/process_id.h"
#include "mongo/rpc/metadata/egress_metadata_hook_list.h"
#include "mongo/s/catalog/sharding_catalog_manager.h"
#include "mongo/s/client/shard_registry.h"
#include "mongo/s/grid.h"
#include "mongo/s/sharding_initialization.h"
#include "mongo/scripting/dbdirectclient_factory.h"
#include "mongo/scripting/engine.h"
#include "mongo/stdx/future.h"
#include "mongo/stdx/memory.h"
#include "mongo/stdx/thread.h"
#include "mongo/transport/transport_layer_manager.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/background.h"
#include "mongo/util/cmdline_utils/censor_cmdline.h"
#include "mongo/util/concurrency/idle_thread_block.h"
#include "mongo/util/concurrency/thread_name.h"
#include "mongo/util/exception_filter_win32.h"
#include "mongo/util/exit.h"
#include "mongo/util/fail_point_service.h"
#include "mongo/util/fast_clock_source_factory.h"
#include "mongo/util/log.h"
#include "mongo/util/net/listen.h"
#include "mongo/util/net/ssl_manager.h"
#include "mongo/util/ntservice.h"
#include "mongo/util/options_parser/startup_options.h"
#include "mongo/util/periodic_runner.h"
#include "mongo/util/periodic_runner_factory.h"
#include "mongo/util/quick_exit.h"
#include "mongo/util/ramlog.h"
#include "mongo/util/scopeguard.h"
#include "mongo/util/signal_handlers.h"
#include "mongo/util/stacktrace.h"
#include "mongo/util/startup_test.h"
#include "mongo/util/text.h"
#include "mongo/util/time_support.h"
#include "mongo/util/version.h"
#if !defined(_WIN32)
#include <sys/file.h>
#endif
namespace mongo {
using logger::LogComponent;
using std::endl;
namespace {
constexpr StringData upgradeLink = "http://dochub.mongodb.org/core/3.6-upgrade-fcv"_sd;
constexpr StringData mustDowngradeErrorMsg =
"UPGRADE PROBLEM: The data files need to be fully upgraded to version 3.4 before attempting an upgrade to 3.6; see http://dochub.mongodb.org/core/3.6-upgrade-fcv for more details."_sd;
Status restoreMissingFeatureCompatibilityVersionDocument(OperationContext* opCtx,
const std::vector<std::string>& dbNames) {
bool isMmapV1 = opCtx->getServiceContext()->getGlobalStorageEngine()->isMmapV1();
// Check whether there are any collections with UUIDs.
bool collsHaveUuids = false;
bool allCollsHaveUuids = true;
for (const auto& dbName : dbNames) {
Database* db = dbHolder().openDb(opCtx, dbName);
invariant(db);
for (auto collectionIt = db->begin(); collectionIt != db->end(); ++collectionIt) {
Collection* coll = *collectionIt;
if (coll->uuid()) {
collsHaveUuids = true;
} else if (!coll->uuid() && (!isMmapV1 ||
!(coll->ns().coll() == "system.indexes" ||
coll->ns().coll() == "system.namespaces"))) {
// Exclude system.indexes and system.namespaces from the UUID check until
// SERVER-29926 and SERVER-30095 are addressed, respectively.
allCollsHaveUuids = false;
}
}
}
if (!collsHaveUuids) {
return {ErrorCodes::MustDowngrade, mustDowngradeErrorMsg};
}
// Restore the featureCompatibilityVersion document if it is missing.
NamespaceString nss(FeatureCompatibilityVersion::kCollection);
Database* db = dbHolder().get(opCtx, nss.db());
// If the admin database does not exist, create it.
if (!db) {
log() << "Re-creating admin database that was dropped.";
}
db = dbHolder().openDb(opCtx, nss.db());
invariant(db);
// If admin.system.version does not exist, create it without a UUID.
if (!db->getCollection(opCtx, FeatureCompatibilityVersion::kCollection)) {
log() << "Re-creating admin.system.version collection that was dropped.";
allCollsHaveUuids = false;
BSONObjBuilder bob;
bob.append("create", nss.coll());
BSONObj createObj = bob.done();
uassertStatusOK(createCollection(opCtx, nss.db().toString(), createObj));
}
Collection* versionColl = db->getCollection(opCtx, FeatureCompatibilityVersion::kCollection);
invariant(versionColl);
BSONObj featureCompatibilityVersion;
if (!Helpers::findOne(opCtx,
versionColl,
BSON("_id" << FeatureCompatibilityVersion::kParameterName),
featureCompatibilityVersion)) {
log() << "Re-creating featureCompatibilityVersion document that was deleted.";
BSONObjBuilder bob;
bob.append("_id", FeatureCompatibilityVersion::kParameterName);
if (allCollsHaveUuids) {
// If all collections have UUIDs, create a featureCompatibilityVersion document with
// version equal to 3.6.
bob.append(FeatureCompatibilityVersion::kVersionField,
FeatureCompatibilityVersionCommandParser::kVersion36);
} else {
// If some collections do not have UUIDs, create a featureCompatibilityVersion document
// with version equal to 3.4 and targetVersion 3.6.
bob.append(FeatureCompatibilityVersion::kVersionField,
FeatureCompatibilityVersionCommandParser::kVersion34);
bob.append(FeatureCompatibilityVersion::kTargetVersionField,
FeatureCompatibilityVersionCommandParser::kVersion36);
}
auto fcvObj = bob.done();
writeConflictRetry(opCtx, "insertFCVDocument", nss.ns(), [&] {
WriteUnitOfWork wunit(opCtx);
OpDebug* const nullOpDebug = nullptr;
uassertStatusOK(
versionColl->insertDocument(opCtx, InsertStatement(fcvObj), nullOpDebug, false));
wunit.commit();
});
}
invariant(Helpers::findOne(opCtx,
versionColl,
BSON("_id" << FeatureCompatibilityVersion::kParameterName),
featureCompatibilityVersion));
return Status::OK();
}
const NamespaceString startupLogCollectionName("local.startup_log");
const NamespaceString kSystemReplSetCollection("local.system.replset");
#ifdef _WIN32
const ntservice::NtServiceDefaultStrings defaultServiceStrings = {
L"MongoDB", L"MongoDB", L"MongoDB Server"};
#endif
void logStartup(OperationContext* opCtx) {
BSONObjBuilder toLog;
std::stringstream id;
id << getHostNameCached() << "-" << jsTime().asInt64();
toLog.append("_id", id.str());
toLog.append("hostname", getHostNameCached());
toLog.appendTimeT("startTime", time(0));
toLog.append("startTimeLocal", dateToCtimeString(Date_t::now()));
toLog.append("cmdLine", serverGlobalParams.parsedOpts);
toLog.append("pid", ProcessId::getCurrent().asLongLong());
BSONObjBuilder buildinfo(toLog.subobjStart("buildinfo"));
VersionInfoInterface::instance().appendBuildInfo(&buildinfo);
appendStorageEngineList(&buildinfo);
buildinfo.doneFast();
BSONObj o = toLog.obj();
Lock::GlobalWrite lk(opCtx);
AutoGetOrCreateDb autoDb(opCtx, startupLogCollectionName.db(), mongo::MODE_X);
Database* db = autoDb.getDb();
Collection* collection = db->getCollection(opCtx, startupLogCollectionName);
WriteUnitOfWork wunit(opCtx);
if (!collection) {
BSONObj options = BSON("capped" << true << "size" << 10 * 1024 * 1024);
repl::UnreplicatedWritesBlock uwb(opCtx);
uassertStatusOK(userCreateNS(opCtx, db, startupLogCollectionName.ns(), options));
collection = db->getCollection(opCtx, startupLogCollectionName);
}
invariant(collection);
OpDebug* const nullOpDebug = nullptr;
uassertStatusOK(collection->insertDocument(opCtx, InsertStatement(o), nullOpDebug, false));
wunit.commit();
}
/**
* If we are in a replset, every replicated collection must have an _id index.
* As we scan each database, we also gather a list of drop-pending collection namespaces for
* the DropPendingCollectionReaper to clean up eventually.
*/
void checkForIdIndexesAndDropPendingCollections(OperationContext* opCtx, Database* db) {
if (db->name() == "local") {
// Collections in the local database are not replicated, so we do not need an _id index on
// any collection. For the same reason, it is not possible for the local database to contain
// any drop-pending collections (drops are effective immediately).
return;
}
std::list<std::string> collectionNames;
db->getDatabaseCatalogEntry()->getCollectionNamespaces(&collectionNames);
for (const auto& collectionName : collectionNames) {
const NamespaceString ns(collectionName);
if (ns.isDropPendingNamespace()) {
auto dropOpTime = fassertStatusOK(40459, ns.getDropPendingNamespaceOpTime());
log() << "Found drop-pending namespace " << ns << " with drop optime " << dropOpTime;
repl::DropPendingCollectionReaper::get(opCtx)->addDropPendingNamespace(dropOpTime, ns);
}
if (ns.isSystem())
continue;
Collection* coll = db->getCollection(opCtx, collectionName);
if (!coll)
continue;
if (coll->getIndexCatalog()->findIdIndex(opCtx))
continue;
log() << "WARNING: the collection '" << collectionName << "' lacks a unique index on _id."
<< " This index is needed for replication to function properly" << startupWarningsLog;
log() << "\t To fix this, you need to create a unique index on _id."
<< " See http://dochub.mongodb.org/core/build-replica-set-indexes"
<< startupWarningsLog;
}
}
/**
* Checks if this server was started without --replset but has a config in local.system.replset
* (meaning that this is probably a replica set member started in stand-alone mode).
*
* @returns the number of documents in local.system.replset or 0 if this was started with
* --replset.
*/
unsigned long long checkIfReplMissingFromCommandLine(OperationContext* opCtx) {
// This is helpful for the query below to work as you can't open files when readlocked
Lock::GlobalWrite lk(opCtx);
if (!repl::getGlobalReplicationCoordinator()->getSettings().usingReplSets()) {
DBDirectClient c(opCtx);
return c.count(kSystemReplSetCollection.ns());
}
return 0;
}
/**
* Check that the oplog is capped, and abort the process if it is not.
* Caller must lock DB before calling this function.
*/
void checkForCappedOplog(OperationContext* opCtx, Database* db) {
const NamespaceString oplogNss(NamespaceString::kRsOplogNamespace);
invariant(opCtx->lockState()->isDbLockedForMode(oplogNss.db(), MODE_IS));
Collection* oplogCollection = db->getCollection(opCtx, oplogNss);
if (oplogCollection && !oplogCollection->isCapped()) {
severe() << "The oplog collection " << oplogNss
<< " is not capped; a capped oplog is a requirement for replication to function.";
fassertFailedNoTrace(40115);
}
}
/**
* Return an error status if the wrong mongod version was used for these datafiles. The boolean
* represents whether there are non-local databases.
*/
StatusWith<bool> repairDatabasesAndCheckVersion(OperationContext* opCtx) {
LOG(1) << "enter repairDatabases (to check pdfile version #)";
auto const storageEngine = opCtx->getServiceContext()->getGlobalStorageEngine();
Lock::GlobalWrite lk(opCtx);
std::vector<std::string> dbNames;
storageEngine->listDatabases(&dbNames);
// Repair all databases first, so that we do not try to open them if they are in bad shape
if (storageGlobalParams.repair) {
invariant(!storageGlobalParams.readOnly);
for (const auto& dbName : dbNames) {
LOG(1) << " Repairing database: " << dbName;
fassert(18506, repairDatabase(opCtx, storageEngine, dbName));
}
// Attempt to restore the featureCompatibilityVersion document if it is missing.
NamespaceString nss(FeatureCompatibilityVersion::kCollection);
Database* db = dbHolder().get(opCtx, nss.db());
Collection* versionColl;
BSONObj featureCompatibilityVersion;
if (!db || !(versionColl = db->getCollection(opCtx, nss)) ||
!Helpers::findOne(opCtx,
versionColl,
BSON("_id" << FeatureCompatibilityVersion::kParameterName),
featureCompatibilityVersion)) {
auto status = restoreMissingFeatureCompatibilityVersionDocument(opCtx, dbNames);
if (!status.isOK()) {
return status;
}
}
}
const repl::ReplSettings& replSettings = repl::getGlobalReplicationCoordinator()->getSettings();
if (!storageGlobalParams.readOnly) {
StatusWith<std::vector<StorageEngine::CollectionIndexNamePair>> swIndexesToRebuild =
storageEngine->reconcileCatalogAndIdents(opCtx);
fassertStatusOK(40593, swIndexesToRebuild);
for (auto&& collIndexPair : swIndexesToRebuild.getValue()) {
const std::string& coll = collIndexPair.first;
const std::string& indexName = collIndexPair.second;
DatabaseCatalogEntry* dbce =
storageEngine->getDatabaseCatalogEntry(opCtx, NamespaceString(coll).db());
invariant(dbce);
CollectionCatalogEntry* cce = dbce->getCollectionCatalogEntry(coll);
invariant(cce);
StatusWith<IndexNameObjs> swIndexToRebuild(
getIndexNameObjs(opCtx, dbce, cce, [&indexName](const std::string& str) {
return str == indexName;
}));
if (!swIndexToRebuild.isOK() || swIndexToRebuild.getValue().first.empty()) {
severe() << "Unable to get indexes for collection. Collection: " << coll;
fassertFailedNoTrace(40590);
}
invariant(swIndexToRebuild.getValue().first.size() == 1 &&
swIndexToRebuild.getValue().second.size() == 1);
fassertStatusOK(
40592, rebuildIndexesOnCollection(opCtx, dbce, cce, swIndexToRebuild.getValue()));
}
// We open the "local" database before calling checkIfReplMissingFromCommandLine() to
// ensure the in-memory catalog entries for the 'kSystemReplSetCollection' collection have
// been populated if the collection exists. If the "local" database didn't exist at this
// point yet, then it will be created. If the mongod is running in a read-only mode, then
// it is fine to not open the "local" database and populate the catalog entries because we
// won't attempt to drop the temporary collections anyway.
Lock::DBLock dbLock(opCtx, kSystemReplSetCollection.db(), MODE_X);
dbHolder().openDb(opCtx, kSystemReplSetCollection.db());
}
// On replica set members we only clear temp collections on DBs other than "local" during
// promotion to primary. On pure slaves, they are only cleared when the oplog tells them
// to. The local DB is special because it is not replicated. See SERVER-10927 for more
// details.
const bool shouldClearNonLocalTmpCollections =
!(checkIfReplMissingFromCommandLine(opCtx) || replSettings.usingReplSets() ||
replSettings.isSlave());
// To check whether we are upgrading to 3.6 or have already upgraded to 3.6.
bool collsHaveUuids = false;
// To check whether a featureCompatibilityVersion document exists.
bool fcvDocumentExists = false;
// To check whether we have databases other than local.
bool nonLocalDatabases = false;
// Refresh list of database names to include newly-created admin, if it exists.
dbNames.clear();
storageEngine->listDatabases(&dbNames);
for (const auto& dbName : dbNames) {
if (dbName != "local") {
nonLocalDatabases = true;
}
LOG(1) << " Recovering database: " << dbName;
Database* db = dbHolder().openDb(opCtx, dbName);
invariant(db);
// First thing after opening the database is to check for file compatibility,
// otherwise we might crash if this is a deprecated format.
auto status = db->getDatabaseCatalogEntry()->currentFilesCompatible(opCtx);
if (!status.isOK()) {
if (status.code() == ErrorCodes::CanRepairToDowngrade) {
// Convert CanRepairToDowngrade statuses to MustUpgrade statuses to avoid logging a
// potentially confusing and inaccurate message.
//
// TODO SERVER-24097: Log a message informing the user that they can start the
// current version of mongod with --repair and then proceed with normal startup.
status = {ErrorCodes::MustUpgrade, status.reason()};
}
severe() << "Unable to start mongod due to an incompatibility with the data files and"
" this version of mongod: "
<< redact(status);
severe() << "Please consult our documentation when trying to downgrade to a previous"
" major release";
quickExit(EXIT_NEED_UPGRADE);
MONGO_UNREACHABLE;
}
// Check if admin.system.version contains an invalid featureCompatibilityVersion.
// If a valid featureCompatibilityVersion is present, cache it as a server parameter.
if (dbName == "admin") {
if (Collection* versionColl =
db->getCollection(opCtx, FeatureCompatibilityVersion::kCollection)) {
BSONObj featureCompatibilityVersion;
if (Helpers::findOne(opCtx,
versionColl,
BSON("_id" << FeatureCompatibilityVersion::kParameterName),
featureCompatibilityVersion)) {
auto swVersion =
FeatureCompatibilityVersion::parse(featureCompatibilityVersion);
if (!swVersion.isOK()) {
severe() << swVersion.getStatus();
// Note this error path captures all cases of an FCV document existing,
// but with any value other than "3.4" or "3.6". This includes unexpected
// cases with no path forward such as the FCV value not being a string.
return {ErrorCodes::MustDowngrade,
str::stream()
<< "UPGRADE PROBLEM: Unable to parse the "
"featureCompatibilityVersion document. The data files need "
"to be fully upgraded to version 3.4 before attempting an "
"upgrade to 3.6. If you are upgrading to 3.6, see "
<< upgradeLink
<< "."};
}
fcvDocumentExists = true;
auto version = swVersion.getValue();
serverGlobalParams.featureCompatibility.setVersion(version);
FeatureCompatibilityVersion::updateMinWireVersion();
// On startup, if the version is in an upgrading or downrading state, print a
// warning.
if (version ==
ServerGlobalParams::FeatureCompatibility::Version::kUpgradingTo36) {
log() << "** WARNING: A featureCompatibilityVersion upgrade did not "
<< "complete." << startupWarningsLog;
log() << "** The current featureCompatibilityVersion is "
<< FeatureCompatibilityVersion::toString(version) << "."
<< startupWarningsLog;
log() << "** To fix this, use the setFeatureCompatibilityVersion "
<< "command to resume upgrade to 3.6." << startupWarningsLog;
} else if (version == ServerGlobalParams::FeatureCompatibility::Version::
kDowngradingTo34) {
log() << "** WARNING: A featureCompatibilityVersion downgrade did not "
<< "complete. " << startupWarningsLog;
log() << "** The current featureCompatibilityVersion is "
<< FeatureCompatibilityVersion::toString(version) << "."
<< startupWarningsLog;
log() << "** To fix this, use the setFeatureCompatibilityVersion "
<< "command to resume downgrade to 3.4." << startupWarningsLog;
}
}
}
}
// Iterate through collections and check for UUIDs.
for (auto collectionIt = db->begin(); !collsHaveUuids && collectionIt != db->end();
++collectionIt) {
Collection* coll = *collectionIt;
if (coll->uuid()) {
collsHaveUuids = true;
}
}
// Major versions match, check indexes
const NamespaceString systemIndexes(db->name(), "system.indexes");
Collection* coll = db->getCollection(opCtx, systemIndexes);
auto exec = InternalPlanner::collectionScan(
opCtx, systemIndexes.ns(), coll, PlanExecutor::NO_YIELD);
BSONObj index;
PlanExecutor::ExecState state;
while (PlanExecutor::ADVANCED == (state = exec->getNext(&index, NULL))) {
const BSONObj key = index.getObjectField("key");
const auto plugin = IndexNames::findPluginName(key);
if (db->getDatabaseCatalogEntry()->isOlderThan24(opCtx)) {
if (IndexNames::existedBefore24(plugin)) {
continue;
}
log() << "Index " << index << " claims to be of type '" << plugin << "', "
<< "which is either invalid or did not exist before v2.4. "
<< "See the upgrade section: "
<< "http://dochub.mongodb.org/core/upgrade-2.4" << startupWarningsLog;
}
if (index["v"].isNumber() && index["v"].numberInt() == 0) {
log() << "WARNING: The index: " << index << " was created with the deprecated"
<< " v:0 format. This format will not be supported in a future release."
<< startupWarningsLog;
log() << "\t To fix this, you need to rebuild this index."
<< " For instructions, see http://dochub.mongodb.org/core/rebuild-v0-indexes"
<< startupWarningsLog;
}
}
// Non-yielding collection scans from InternalPlanner will never error.
invariant(PlanExecutor::IS_EOF == state);
if (replSettings.usingReplSets()) {
// We only care about _id indexes and drop-pending collections if we are in a replset.
checkForIdIndexesAndDropPendingCollections(opCtx, db);
// Ensure oplog is capped (mmap does not guarantee order of inserts on noncapped
// collections)
if (db->name() == "local") {
checkForCappedOplog(opCtx, db);
}
}
if (!storageGlobalParams.readOnly &&
(shouldClearNonLocalTmpCollections || dbName == "local")) {
db->clearTmpCollections(opCtx);
}
}
// Fail to start up if there is no featureCompatibilityVersion document and there are non-local
// databases present.
if (!fcvDocumentExists && nonLocalDatabases) {
if (collsHaveUuids) {
severe()
<< "Unable to start up mongod due to missing featureCompatibilityVersion document.";
if (opCtx->getServiceContext()->getGlobalStorageEngine()->isMmapV1()) {
severe()
<< "Please run with --journalOptions "
<< static_cast<int>(MMAPV1Options::JournalRecoverOnly)
<< " to recover the journal. Then run with --repair to restore the document.";
} else {
severe() << "Please run with --repair to restore the document.";
}
fassertFailedNoTrace(40652);
} else {
return {ErrorCodes::MustDowngrade, mustDowngradeErrorMsg};
}
}
LOG(1) << "done repairDatabases";
return nonLocalDatabases;
}
void initWireSpec() {
WireSpec& spec = WireSpec::instance();
// The featureCompatibilityVersion behavior defaults to the downgrade behavior while the
// in-memory version is unset.
spec.incomingInternalClient.minWireVersion = RELEASE_2_4_AND_BEFORE;
spec.incomingInternalClient.maxWireVersion = LATEST_WIRE_VERSION;
spec.outgoing.minWireVersion = RELEASE_2_4_AND_BEFORE;
spec.outgoing.maxWireVersion = LATEST_WIRE_VERSION;
spec.isInternalClient = true;
}
MONGO_FP_DECLARE(shutdownAtStartup);
ExitCode _initAndListen(int listenPort) {
Client::initThread("initandlisten");
initWireSpec();
auto serviceContext = checked_cast<ServiceContextMongoD*>(getGlobalServiceContext());
serviceContext->setFastClockSource(FastClockSourceFactory::create(Milliseconds(10)));
auto opObserverRegistry = stdx::make_unique<OpObserverRegistry>();
opObserverRegistry->addObserver(stdx::make_unique<OpObserverImpl>());
opObserverRegistry->addObserver(stdx::make_unique<UUIDCatalogObserver>());
serviceContext->setOpObserver(std::move(opObserverRegistry));
DBDirectClientFactory::get(serviceContext).registerImplementation([](OperationContext* opCtx) {
return std::unique_ptr<DBClientBase>(new DBDirectClient(opCtx));
});
const repl::ReplSettings& replSettings =
repl::ReplicationCoordinator::get(serviceContext)->getSettings();
{
ProcessId pid = ProcessId::getCurrent();
LogstreamBuilder l = log(LogComponent::kControl);
l << "MongoDB starting : pid=" << pid << " port=" << serverGlobalParams.port
<< " dbpath=" << storageGlobalParams.dbpath;
if (replSettings.isMaster())
l << " master=" << replSettings.isMaster();
if (replSettings.isSlave())
l << " slave=" << (int)replSettings.isSlave();
const bool is32bit = sizeof(int*) == 4;
l << (is32bit ? " 32" : " 64") << "-bit host=" << getHostNameCached() << endl;
}
DEV log(LogComponent::kControl) << "DEBUG build (which is slower)" << endl;
#if defined(_WIN32)
VersionInfoInterface::instance().logTargetMinOS();
#endif
logProcessDetails();
serviceContext->createLockFile();
serviceContext->setServiceEntryPoint(
stdx::make_unique<ServiceEntryPointMongod>(serviceContext));
{
auto tl =
transport::TransportLayerManager::createWithConfig(&serverGlobalParams, serviceContext);
auto res = tl->setup();
if (!res.isOK()) {
error() << "Failed to set up listener: " << res;
return EXIT_NET_ERROR;
}
serviceContext->setTransportLayer(std::move(tl));
}
serviceContext->initializeGlobalStorageEngine();
#ifdef MONGO_CONFIG_WIREDTIGER_ENABLED
if (EncryptionHooks::get(serviceContext)->restartRequired()) {
exitCleanly(EXIT_CLEAN);
}
#endif
// Warn if we detect configurations for multiple registered storage engines in the same
// configuration file/environment.
if (serverGlobalParams.parsedOpts.hasField("storage")) {
BSONElement storageElement = serverGlobalParams.parsedOpts.getField("storage");
invariant(storageElement.isABSONObj());
for (auto&& e : storageElement.Obj()) {
// Ignore if field name under "storage" matches current storage engine.
if (storageGlobalParams.engine == e.fieldName()) {
continue;
}
// Warn if field name matches non-active registered storage engine.
if (serviceContext->isRegisteredStorageEngine(e.fieldName())) {
warning() << "Detected configuration for non-active storage engine "
<< e.fieldName() << " when current storage engine is "
<< storageGlobalParams.engine;
}
}
}
logMongodStartupWarnings(storageGlobalParams, serverGlobalParams, serviceContext);
{
std::stringstream ss;
ss << endl;
ss << "*********************************************************************" << endl;
ss << " ERROR: dbpath (" << storageGlobalParams.dbpath << ") does not exist." << endl;
ss << " Create this directory or give existing directory in --dbpath." << endl;
ss << " See http://dochub.mongodb.org/core/startingandstoppingmongo" << endl;
ss << "*********************************************************************" << endl;
uassert(10296, ss.str().c_str(), boost::filesystem::exists(storageGlobalParams.dbpath));
}
{
std::stringstream ss;
ss << "repairpath (" << storageGlobalParams.repairpath << ") does not exist";
uassert(12590, ss.str().c_str(), boost::filesystem::exists(storageGlobalParams.repairpath));
}
initializeSNMP();
if (!storageGlobalParams.readOnly) {
boost::filesystem::remove_all(storageGlobalParams.dbpath + "/_tmp/");
}
if (mmapv1GlobalOptions.journalOptions & MMAPV1Options::JournalRecoverOnly)
return EXIT_NET_ERROR;
if (mongodGlobalParams.scriptingEnabled) {
ScriptEngine::setup();
}
auto startupOpCtx = serviceContext->makeOperationContext(&cc());
bool canCallFCVSetIfCleanStartup = !storageGlobalParams.readOnly &&
!(replSettings.isSlave() || storageGlobalParams.engine == "devnull");
if (canCallFCVSetIfCleanStartup && !replSettings.usingReplSets()) {
Lock::GlobalWrite lk(startupOpCtx.get());
FeatureCompatibilityVersion::setIfCleanStartup(startupOpCtx.get(),
repl::StorageInterface::get(serviceContext));
}
auto swNonLocalDatabases = repairDatabasesAndCheckVersion(startupOpCtx.get());
if (!swNonLocalDatabases.isOK()) {
// SERVER-31611 introduced a return value to `repairDatabasesAndCheckVersion`. Previously,
// a failing condition would fassert. SERVER-31611 covers a case where the binary (3.6) is
// refusing to start up because it refuses acknowledgement of FCV 3.2 and requires the
// user to start up with an older binary. Thus shutting down the server must leave the
// datafiles in a state that the older binary can start up. This requires going through a
// clean shutdown.
//
// The invariant is *not* a statement that `repairDatabasesAndCheckVersion` must return
// `MustDowngrade`. Instead, it is meant as a guardrail to protect future developers from
// accidentally buying into this behavior. New errors that are returned from the method
// may or may not want to go through a clean shutdown, and they likely won't want the
// program to return an exit code of `EXIT_NEED_DOWNGRADE`.
severe(LogComponent::kControl) << "** IMPORTANT: "
<< swNonLocalDatabases.getStatus().reason();
invariant(swNonLocalDatabases == ErrorCodes::MustDowngrade);
exitCleanly(EXIT_NEED_DOWNGRADE);
}
// Assert that the in-memory featureCompatibilityVersion parameter has been explicitly set. If
// we are part of a replica set and are started up with no data files, we do not set the
// featureCompatibilityVersion until a primary is chosen. For this case, we expect the in-memory
// featureCompatibilityVersion parameter to still be uninitialized until after startup.
if (canCallFCVSetIfCleanStartup &&
(!replSettings.usingReplSets() || swNonLocalDatabases.getValue())) {
invariant(serverGlobalParams.featureCompatibility.isVersionInitialized());
}
if (storageGlobalParams.upgrade) {
log() << "finished checking dbs";
exitCleanly(EXIT_CLEAN);
}
// Start up health log writer thread.
HealthLog::get(startupOpCtx.get()).startup();
auto const globalAuthzManager = AuthorizationManager::get(serviceContext);
uassertStatusOK(globalAuthzManager->initialize(startupOpCtx.get()));
// This is for security on certain platforms (nonce generation)
srand((unsigned)(curTimeMicros64()) ^ (unsigned(uintptr_t(&startupOpCtx))));
if (globalAuthzManager->shouldValidateAuthSchemaOnStartup()) {
Status status = verifySystemIndexes(startupOpCtx.get());
if (!status.isOK()) {
log() << redact(status);
if (status == ErrorCodes::AuthSchemaIncompatible) {
exitCleanly(EXIT_NEED_UPGRADE);
} else {
quickExit(EXIT_FAILURE);
}
}
// SERVER-14090: Verify that auth schema version is schemaVersion26Final.
int foundSchemaVersion;
status =
globalAuthzManager->getAuthorizationVersion(startupOpCtx.get(), &foundSchemaVersion);
if (!status.isOK()) {
log() << "Auth schema version is incompatible: "
<< "User and role management commands require auth data to have "
<< "at least schema version " << AuthorizationManager::schemaVersion26Final
<< " but startup could not verify schema version: " << status;
exitCleanly(EXIT_NEED_UPGRADE);
}
if (foundSchemaVersion <= AuthorizationManager::schemaVersion26Final) {
log() << "This server is using MONGODB-CR, an authentication mechanism which "
<< "has been removed from MongoDB 3.8. In order to upgrade the auth schema, "
<< "first downgrade MongoDB binaries to version 3.6 and then run the "
<< "authSchemaUpgrade command. "
<< "See http://dochub.mongodb.org/core/3.0-upgrade-to-scram-sha-1";
exitCleanly(EXIT_NEED_UPGRADE);
}
} else if (globalAuthzManager->isAuthEnabled()) {
error() << "Auth must be disabled when starting without auth schema validation";
exitCleanly(EXIT_BADOPTIONS);
} else {
// If authSchemaValidation is disabled and server is running without auth,
// warn the user and continue startup without authSchema metadata checks.
log() << startupWarningsLog;
log() << "** WARNING: Startup auth schema validation checks are disabled for the "
"database."
<< startupWarningsLog;
log() << "** This mode should only be used to manually repair corrupted auth "
"data."
<< startupWarningsLog;
}
SessionCatalog::create(serviceContext);
// This function may take the global lock.
auto shardingInitialized =
uassertStatusOK(ShardingState::get(startupOpCtx.get())
->initializeShardingAwarenessIfNeeded(startupOpCtx.get()));
if (shardingInitialized) {
waitForShardRegistryReload(startupOpCtx.get()).transitional_ignore();
}
if (!storageGlobalParams.readOnly) {
logStartup(startupOpCtx.get());
startMongoDFTDC();
restartInProgressIndexesFromLastShutdown(startupOpCtx.get());
if (serverGlobalParams.clusterRole == ClusterRole::ShardServer) {
// Note: For replica sets, ShardingStateRecovery happens on transition to primary.
if (!repl::getGlobalReplicationCoordinator()->isReplEnabled()) {
uassertStatusOK(ShardingStateRecovery::recover(startupOpCtx.get()));
}
} else if (serverGlobalParams.clusterRole == ClusterRole::ConfigServer) {
ShardedConnectionInfo::addHook(startupOpCtx->getServiceContext());
uassertStatusOK(
initializeGlobalShardingStateForMongod(startupOpCtx.get(),
ConnectionString::forLocal(),
kDistLockProcessIdForConfigServer));
Balancer::create(startupOpCtx->getServiceContext());
ShardingCatalogManager::create(
startupOpCtx->getServiceContext(),
makeShardingTaskExecutor(executor::makeNetworkInterface("AddShard-TaskExecutor")));
} else if (replSettings.usingReplSets()) { // standalone replica set
auto keysCollectionClient = stdx::make_unique<KeysCollectionClientDirect>();
auto keyManager = std::make_shared<KeysCollectionManager>(
KeysCollectionManager::kKeyManagerPurposeString,
std::move(keysCollectionClient),
Seconds(KeysRotationIntervalSec));
keyManager->startMonitoring(startupOpCtx->getServiceContext());
LogicalTimeValidator::set(startupOpCtx->getServiceContext(),
stdx::make_unique<LogicalTimeValidator>(keyManager));
}
repl::ReplicationCoordinator::get(startupOpCtx.get())->startup(startupOpCtx.get());
const unsigned long long missingRepl =
checkIfReplMissingFromCommandLine(startupOpCtx.get());
if (missingRepl) {
log() << startupWarningsLog;
log() << "** WARNING: mongod started without --replSet yet " << missingRepl
<< " documents are present in local.system.replset" << startupWarningsLog;
log() << "** Restart with --replSet unless you are doing maintenance and "
<< " no other clients are connected." << startupWarningsLog;
log() << "** The TTL collection monitor will not start because of this."
<< startupWarningsLog;
log() << "** ";
log() << " For more info see http://dochub.mongodb.org/core/ttlcollections";
log() << startupWarningsLog;
} else {
startTTLBackgroundJob();
}
if (replSettings.usingReplSets() || (!replSettings.isMaster() && replSettings.isSlave()) ||
!internalValidateFeaturesAsMaster) {
serverGlobalParams.validateFeaturesAsMaster.store(false);
}
}
startClientCursorMonitor();
PeriodicTask::startRunningPeriodicTasks();
// Set up the periodic runner for background job execution
auto runner = makePeriodicRunner();
runner->startup().transitional_ignore();
serviceContext->setPeriodicRunner(std::move(runner));
SessionKiller::set(serviceContext,
std::make_shared<SessionKiller>(serviceContext, killSessionsLocal));
// Set up the logical session cache
LogicalSessionCacheServer kind = LogicalSessionCacheServer::kStandalone;
if (serverGlobalParams.clusterRole == ClusterRole::ShardServer) {
kind = LogicalSessionCacheServer::kSharded;
} else if (serverGlobalParams.clusterRole == ClusterRole::ConfigServer) {
kind = LogicalSessionCacheServer::kConfigServer;
} else if (replSettings.usingReplSets()) {
kind = LogicalSessionCacheServer::kReplicaSet;
}
auto sessionCache = makeLogicalSessionCacheD(serviceContext, kind);
LogicalSessionCache::set(serviceContext, std::move(sessionCache));
// MessageServer::run will return when exit code closes its socket and we don't need the
// operation context anymore
startupOpCtx.reset();