SERVER-64195 Provide user-facing `moveRange` command

1 files changed, 148 insertions, 0 deletions

diff --git a/src/mongo/db/s/config/configsvr_move_range_command.cpp b/src/mongo/db/s/config/configsvr_move_range_command.cpp
new file mode 100644
index 00000000000..c95b02b6e25
--- /dev/null
+++ b/src/mongo/db/s/config/configsvr_move_range_command.cpp
@@ -0,0 +1,148 @@
+/**
+ *    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.
+ */
+
+#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kCommand
+
+#include "mongo/db/auth/action_type.h"
+#include "mongo/db/auth/authorization_session.h"
+#include "mongo/db/commands.h"
+#include "mongo/db/s/balancer/balancer.h"
+#include "mongo/s/grid.h"
+#include "mongo/s/request_types/move_range_request_gen.h"
+#include "mongo/s/sharding_feature_flags_gen.h"
+
+namespace mongo {
+namespace {
+
+class ConfigSvrMoveRangeCommand final : public TypedCommand<ConfigSvrMoveRangeCommand> {
+public:
+    using Request = ConfigsvrMoveRange;
+
+    std::string help() const override {
+        return "Internal command only invokable on the config server. Do not call directly. "
+               "Requests the balancer to move a range.";
+    }
+
+    AllowedOnSecondary secondaryAllowed(ServiceContext*) const override {
+        return AllowedOnSecondary::kNever;
+    }
+
+    bool adminOnly() const override {
+        return true;
+    }
+
+    class Invocation final : public InvocationBase {
+    public:
+        using InvocationBase::InvocationBase;
+
+        void typedRun(OperationContext* opCtx) {
+            uassert(ErrorCodes::CommandFailed,
+                    "Can't run moveRange because the feature is disabled in the current FCV mode",
+                    feature_flags::gNoMoreAutoSplitter.isEnabled(
+                        serverGlobalParams.featureCompatibility));
+            uassert(ErrorCodes::IllegalOperation,
+                    str::stream() << Request::kCommandName
+                                  << " can only be run on the config server",
+                    serverGlobalParams.clusterRole == ClusterRole::ConfigServer);
+
+            opCtx->setAlwaysInterruptAtStepDownOrUp();
+
+            const auto nss = ns();
+            const auto& req = request();
+
+            // Set read concern level to local for reads into the config database
+            repl::ReadConcernArgs::get(opCtx) =
+                repl::ReadConcernArgs(repl::ReadConcernLevel::kLocalReadConcern);
+
+            // Make sure that the `to` shard exists
+            uassertStatusOKWithContext(
+                Grid::get(opCtx)->shardRegistry()->getShard(opCtx, req.getToShard()),
+                "Could not find destination shard");
+
+            const auto cm =
+                Grid::get(opCtx)->catalogCache()->getShardedCollectionRoutingInfo(opCtx, nss);
+            const auto chunk = cm.findIntersectingChunkWithSimpleCollation(req.getMin());
+
+            bool validBounds = req.getMin().woCompare(chunk.getMin()) == 0 &&
+                req.getMax().woCompare(chunk.getMax()) == 0;
+            uassert(ErrorCodes::CommandFailed,
+                    "No chunk found with the provided shard key bounds",
+                    validBounds);
+
+            ChunkType chunkType;
+            chunkType.setCollectionUUID(cm.getUUID());
+            chunkType.setMin(chunk.getMin());
+            chunkType.setMax(chunk.getMax());
+            chunkType.setShard(chunk.getShardId());
+            chunkType.setVersion(cm.getVersion());
+
+            {
+                // TODO SERVER-64324 replace this scope calling moveRange instead of moveChunk
+                MigrationSecondaryThrottleOptions secondaryThrottle = [&]() {
+                    if (!req.getSecondaryThrottle()) {
+                        return MigrationSecondaryThrottleOptions::create(
+                            MigrationSecondaryThrottleOptions::kOff);
+                    }
+
+                    return MigrationSecondaryThrottleOptions::createWithWriteConcern(
+                        opCtx->getWriteConcern());
+                }();
+
+                const bool forceJumbo = req.getForceJumbo() != ForceJumbo::kDoNotForce;
+                uassertStatusOK(Balancer::get(opCtx)->moveSingleChunk(opCtx,
+                                                                      nss,
+                                                                      chunkType,
+                                                                      req.getToShard(),
+                                                                      secondaryThrottle,
+                                                                      req.getWaitForDelete(),
+                                                                      forceJumbo));
+            }
+        }
+
+    private:
+        NamespaceString ns() const override {
+            return request().getCommandParameter();
+        }
+
+        bool supportsWriteConcern() const override {
+            return true;
+        }
+
+        void doCheckAuthorization(OperationContext* opCtx) const override {
+            uassert(ErrorCodes::Unauthorized,
+                    "Unauthorized",
+                    AuthorizationSession::get(opCtx->getClient())
+                        ->isAuthorizedForActionsOnResource(ResourcePattern::forClusterResource(),
+                                                           ActionType::internal));
+        }
+    };
+} _cfgsvrMoveRange;
+
+}  // namespace
+}  // namespace mongo