| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| #include <memory> |
| #include <string> |
| #include <vector> |
| |
| #include <gtest/gtest.h> |
| |
| #include "kudu/fs/fs_manager.h" |
| #include "kudu/tserver/mini_tablet_server.h" |
| #include "kudu/tserver/tablet_server.h" |
| #include "kudu/util/env.h" |
| #include "kudu/util/net/net_util.h" |
| #include "kudu/util/path_util.h" |
| #include "kudu/util/status.h" |
| #include "kudu/util/test_macros.h" |
| #include "kudu/util/test_util.h" |
| |
| namespace kudu { |
| namespace tserver { |
| |
| using std::string; |
| using std::unique_ptr; |
| |
| class MiniTabletServerTest : public KuduTest {}; |
| |
| TEST_F(MiniTabletServerTest, TestMultiDirServer) { |
| // Specifying the number of data directories will create subdirectories under the test root. |
| unique_ptr<MiniTabletServer> mini_server; |
| FsManager* fs_manager; |
| |
| int kNumDataDirs = 3; |
| mini_server.reset(new MiniTabletServer(GetTestPath("TServer"), |
| HostPort("127.0.0.1", 0), kNumDataDirs)); |
| ASSERT_OK(mini_server->Start()); |
| fs_manager = mini_server->server()->fs_manager(); |
| ASSERT_STR_CONTAINS(DirName(fs_manager->GetWalsRootDir()), "wal"); |
| ASSERT_EQ(kNumDataDirs, fs_manager->GetDataRootDirs().size()); |
| } |
| |
| // Test opening the FS layout with metadata in the WAL root, moving it to the |
| // first data root, and back. |
| // |
| // Users may want to move the metadata directory from the current default (the |
| // WAL root) to the old default (the first data root), or may be using the old |
| // default and may want to abide by the current default. Both cases are tested. |
| TEST_F(MiniTabletServerTest, TestFsLayoutEndToEnd) { |
| // Use multiple data dirs, otherwise the mini tserver will colocated the WALs |
| // and data dir. |
| const int kNumDataDirs = 2; |
| unique_ptr<MiniTabletServer> mini_server; |
| FsManager* fs_manager = nullptr; |
| const auto& reset_mini_tserver = [&] { |
| mini_server.reset(new MiniTabletServer(GetTestPath("TServer"), |
| HostPort("127.0.0.1", 0), kNumDataDirs)); |
| ASSERT_OK(mini_server->Start()); |
| fs_manager = mini_server->server()->fs_manager(); |
| }; |
| reset_mini_tserver(); |
| |
| // By default, the metadata directory will be placed in the WAL root. |
| const string& tmeta_dir_in_wal_root = fs_manager->GetTabletMetadataDir(); |
| const string& cmeta_dir_in_wal_root = fs_manager->GetConsensusMetadataDir(); |
| ASSERT_STR_CONTAINS(DirName(tmeta_dir_in_wal_root), "wal"); |
| ASSERT_STR_CONTAINS(DirName(cmeta_dir_in_wal_root), "wal"); |
| |
| // Now move the metadata directories into the first directory, emulating the |
| // behavior in Kudu 1.6 and below. |
| const string data_root = DirName(fs_manager->GetDataRootDirs()[0]); |
| const string tmeta_dir_in_data_root = JoinPathSegments( |
| data_root, FsManager::kTabletMetadataDirName); |
| const string cmeta_dir_in_data_root = JoinPathSegments( |
| data_root, FsManager::kConsensusMetadataDirName); |
| mini_server->Shutdown(); |
| ASSERT_OK(env_->RenameFile(tmeta_dir_in_wal_root, tmeta_dir_in_data_root)); |
| ASSERT_OK(env_->RenameFile(cmeta_dir_in_wal_root, cmeta_dir_in_data_root)); |
| |
| // Upon restarting the server, since metadata directories already exist, Kudu |
| // will take them as is. |
| reset_mini_tserver(); |
| ASSERT_EQ(tmeta_dir_in_data_root, fs_manager->GetTabletMetadataDir()); |
| ASSERT_EQ(cmeta_dir_in_data_root, fs_manager->GetConsensusMetadataDir()); |
| ASSERT_FALSE(env_->FileExists(tmeta_dir_in_wal_root)); |
| ASSERT_FALSE(env_->FileExists(cmeta_dir_in_wal_root)); |
| |
| // Let's move back to the newer default and place metadata in the WAL root. |
| mini_server->Shutdown(); |
| ASSERT_OK(env_->RenameFile(tmeta_dir_in_data_root, tmeta_dir_in_wal_root)); |
| ASSERT_OK(env_->RenameFile(cmeta_dir_in_data_root, cmeta_dir_in_wal_root)); |
| reset_mini_tserver(); |
| ASSERT_EQ(tmeta_dir_in_wal_root, fs_manager->GetTabletMetadataDir()); |
| ASSERT_EQ(cmeta_dir_in_wal_root, fs_manager->GetConsensusMetadataDir()); |
| ASSERT_FALSE(env_->FileExists(tmeta_dir_in_data_root)); |
| ASSERT_FALSE(env_->FileExists(cmeta_dir_in_data_root)); |
| } |
| |
| } // namespace tserver |
| } // namespace kudu |