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/**
* Copyright (C) 2018-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.
*/
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kCommand
#include "mongo/platform/basic.h"
#include "mongo/db/audit.h"
#include "mongo/db/auth/action_set.h"
#include "mongo/db/auth/action_type.h"
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/client.h"
#include "mongo/db/commands.h"
#include "mongo/db/write_concern_options.h"
#include "mongo/logv2/log.h"
#include "mongo/s/balancer_configuration.h"
#include "mongo/s/catalog_cache.h"
#include "mongo/s/client/shard_registry.h"
#include "mongo/s/cluster_commands_helpers.h"
#include "mongo/s/config_server_client.h"
#include "mongo/s/grid.h"
#include "mongo/s/request_types/migration_secondary_throttle_options.h"
#include "mongo/util/timer.h"
namespace mongo {
namespace {
class MoveChunkCmd : public ErrmsgCommandDeprecated {
public:
MoveChunkCmd() : ErrmsgCommandDeprecated("moveChunk", "movechunk") {}
AllowedOnSecondary secondaryAllowed(ServiceContext*) const override {
return AllowedOnSecondary::kAlways;
}
bool adminOnly() const override {
return true;
}
bool supportsWriteConcern(const BSONObj& cmd) const override {
return true;
}
std::string help() const override {
return "Example: move chunk that contains the doc {num : 7} to shard001\n"
" { movechunk : 'test.foo' , find : { num : 7 } , to : 'shard0001' }\n"
"Example: move chunk with lower bound 0 and upper bound 10 to shard001\n"
" { movechunk : 'test.foo' , bounds : [ { num : 0 } , { num : 10 } ] "
" , to : 'shard001' }\n";
}
Status checkAuthForCommand(Client* client,
const std::string& dbname,
const BSONObj& cmdObj) const override {
if (!AuthorizationSession::get(client)->isAuthorizedForActionsOnResource(
ResourcePattern::forExactNamespace(NamespaceString(parseNs(dbname, cmdObj))),
ActionType::moveChunk)) {
return Status(ErrorCodes::Unauthorized, "Unauthorized");
}
return Status::OK();
}
std::string parseNs(const std::string& dbname, const BSONObj& cmdObj) const override {
return CommandHelpers::parseNsFullyQualified(cmdObj);
}
bool errmsgRun(OperationContext* opCtx,
const std::string& dbname,
const BSONObj& cmdObj,
std::string& errmsg,
BSONObjBuilder& result) override {
Timer t;
const NamespaceString nss(parseNs(dbname, cmdObj));
const auto cm = uassertStatusOK(
Grid::get(opCtx)->catalogCache()->getShardedCollectionRoutingInfoWithRefresh(opCtx,
nss));
const auto toElt = cmdObj["to"];
uassert(ErrorCodes::TypeMismatch,
"'to' must be of type String",
toElt.type() == BSONType::String);
const std::string toString = toElt.str();
if (!toString.size()) {
errmsg = "you have to specify where you want to move the chunk";
return false;
}
const auto toStatus = Grid::get(opCtx)->shardRegistry()->getShard(opCtx, toString);
if (!toStatus.isOK()) {
LOGV2_OPTIONS(22755,
{logv2::UserAssertAfterLog(ErrorCodes::ShardNotFound)},
"Could not move chunk in {namespace} to {toShardId} because that shard"
" does not exist",
"moveChunk destination shard does not exist",
"toShardId"_attr = toString,
"namespace"_attr = nss.ns());
}
const auto to = toStatus.getValue();
const auto forceJumboElt = cmdObj["forceJumbo"];
const auto forceJumbo = forceJumboElt && forceJumboElt.Bool();
// so far, chunk size serves test purposes; it may or may not become a supported parameter
long long maxChunkSizeBytes = cmdObj["maxChunkSizeBytes"].numberLong();
if (maxChunkSizeBytes == 0) {
maxChunkSizeBytes =
Grid::get(opCtx)->getBalancerConfiguration()->getMaxChunkSizeBytes();
}
BSONObj find = cmdObj.getObjectField("find");
BSONObj bounds = cmdObj.getObjectField("bounds");
// check that only one of the two chunk specification methods is used
if (find.isEmpty() == bounds.isEmpty()) {
errmsg = "need to specify either a find query, or both lower and upper bounds.";
return false;
}
boost::optional<Chunk> chunk;
if (!find.isEmpty()) {
// find
BSONObj shardKey =
uassertStatusOK(cm.getShardKeyPattern().extractShardKeyFromQuery(opCtx, nss, find));
if (shardKey.isEmpty()) {
errmsg = str::stream() << "no shard key found in chunk query " << find;
return false;
}
chunk.emplace(cm.findIntersectingChunkWithSimpleCollation(shardKey));
} else {
// bounds
if (!cm.getShardKeyPattern().isShardKey(bounds[0].Obj()) ||
!cm.getShardKeyPattern().isShardKey(bounds[1].Obj())) {
errmsg = str::stream()
<< "shard key bounds "
<< "[" << bounds[0].Obj() << "," << bounds[1].Obj() << ")"
<< " are not valid for shard key pattern " << cm.getShardKeyPattern().toBSON();
return false;
}
BSONObj minKey = cm.getShardKeyPattern().normalizeShardKey(bounds[0].Obj());
BSONObj maxKey = cm.getShardKeyPattern().normalizeShardKey(bounds[1].Obj());
chunk.emplace(cm.findIntersectingChunkWithSimpleCollation(minKey));
if (chunk->getMin().woCompare(minKey) != 0 || chunk->getMax().woCompare(maxKey) != 0) {
errmsg = str::stream() << "no chunk found with the shard key bounds "
<< ChunkRange(minKey, maxKey).toString();
return false;
}
}
const auto secondaryThrottle =
uassertStatusOK(MigrationSecondaryThrottleOptions::createFromCommand(cmdObj));
ChunkType chunkType;
chunkType.setNS(nss);
chunkType.setMin(chunk->getMin());
chunkType.setMax(chunk->getMax());
chunkType.setShard(chunk->getShardId());
chunkType.setVersion(cm.getVersion());
uassertStatusOK(configsvr_client::moveChunk(opCtx,
chunkType,
to->getId(),
maxChunkSizeBytes,
secondaryThrottle,
cmdObj["_waitForDelete"].trueValue() ||
cmdObj["waitForDelete"].trueValue(),
forceJumbo));
Grid::get(opCtx)
->catalogCache()
->invalidateShardOrEntireCollectionEntryForShardedCollection(
nss, boost::none, chunk->getShardId());
Grid::get(opCtx)
->catalogCache()
->invalidateShardOrEntireCollectionEntryForShardedCollection(
nss, boost::none, to->getId());
result.append("millis", t.millis());
return true;
}
} moveChunk;
} // namespace
} // namespace mongo
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