jojochuang commented on code in PR #11017: URL: https://github.com/apache/ozone/pull/11017#discussion_r3781602138
########## hadoop-ozone/cli-repair/src/main/java/org/apache/hadoop/ozone/repair/om/DownloadOMDB.java: ########## @@ -0,0 +1,128 @@ +/* + * 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. + */ + +package org.apache.hadoop.ozone.repair.om; + +import static org.apache.hadoop.ozone.OzoneConsts.OM_DB_NAME; +import static org.apache.hadoop.ozone.om.OMConfigKeys.OZONE_OM_DB_CHECKPOINT_USE_INODE_BASED_KEY; + +import java.io.IOException; +import java.nio.file.Files; +import java.nio.file.Path; +import java.util.Collections; +import org.apache.commons.io.FileUtils; +import org.apache.hadoop.hdds.cli.HddsVersionProvider; +import org.apache.hadoop.hdds.conf.OzoneConfiguration; +import org.apache.hadoop.hdds.utils.db.DBCheckpoint; +import org.apache.hadoop.ozone.OmUtils; +import org.apache.hadoop.ozone.om.helpers.OMNodeDetails; +import org.apache.hadoop.ozone.om.ratis_snapshot.OmRatisSnapshotProvider; +import org.apache.hadoop.ozone.repair.RepairTool; +import picocli.CommandLine; + +/** + * Tool to download and construct OM DB using follower bootstrap flow. + */ [email protected]( + name = "download", + description = "Downloads and constructs om.db from an OM node using the same checkpoint transfer flow as follower bootstrap.", + mixinStandardHelpOptions = true, + versionProvider = HddsVersionProvider.class +) +public class DownloadOMDB extends RepairTool { + + @CommandLine.Option( + names = {"--service-id", "--om-service-id"}, + description = "Ozone Manager Service ID", + required = false + ) + private String omServiceId; + + @CommandLine.Option( + names = {"--node-id"}, + description = "Node ID of the OM to download om.db from. Required when OM HA is configured.", + required = false + ) + private String nodeId; + + @CommandLine.Option( + names = {"--output-dir"}, + description = "Path where the constructed om.db directory will be written.", + required = true + ) + private Path outputDir; + + @CommandLine.Option( + names = {"--overwrite"}, + description = "Overwrite output directory if it already exists." + ) + private boolean overwrite; + + @Override + public void execute() throws Exception { + OzoneConfiguration conf = getOzoneConf(); + + if (nodeId == null && OmUtils.isServiceIdsDefined(conf)) { + error("This is an HA OM cluster; specify --node-id to select which OM to download from."); + return; + } + + OMNodeDetails omNodeDetails = + OMNodeDetails.getOMNodeDetailsFromConf(conf, omServiceId, nodeId); + if (omNodeDetails == null) { + error("Couldn't determine OM node from the given service-id: %s and node-id: %s.", + omServiceId, nodeId); + return; + } + + if (Files.exists(outputDir)) { + if (!overwrite) { + error("Output directory already exists: %s. Use --overwrite to replace it.", + outputDir.toAbsolutePath()); + return; + } + FileUtils.forceDelete(outputDir.toFile()); + } + Path parent = outputDir.toAbsolutePath().getParent(); + if (parent != null) { + Files.createDirectories(parent); + } + + // This tool intentionally follows the inode-based follower bootstrap transfer. + conf.setBoolean(OZONE_OM_DB_CHECKPOINT_USE_INODE_BASED_KEY, true); + + Path snapshotWorkDir = Files.createTempDirectory("ozone-omdb-bootstrap-"); + DBCheckpoint checkpoint = null; + try (OmRatisSnapshotProvider provider = new OmRatisSnapshotProvider( + conf, snapshotWorkDir.toFile(), + Collections.singletonMap(omNodeDetails.getNodeId(), omNodeDetails))) { + checkpoint = provider.downloadDBSnapshotFromLeader(omNodeDetails.getNodeId()); + Path omDbPath = checkpoint.getCheckpointLocation().resolve(OM_DB_NAME); + if (!Files.isDirectory(omDbPath)) { + throw new IOException("Constructed OM DB directory not found in checkpoint: " + omDbPath); + } + FileUtils.moveDirectory(omDbPath.toFile(), outputDir.toFile()); + info("Successfully downloaded and constructed om.db at: %s", + outputDir.toAbsolutePath()); Review Comment: Fixed in the next commit -- This is an automated message from the Apache Git Service. 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