equanz commented on code in PR #2931: URL: https://github.com/apache/bookkeeper/pull/2931#discussion_r877874434
########## bookkeeper-server/src/main/java/org/apache/bookkeeper/tools/cli/commands/bookies/CorrectEnsemblePlacementCommand.java: ########## @@ -0,0 +1,321 @@ +/* + * 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.bookkeeper.tools.cli.commands.bookies; + +import com.beust.jcommander.Parameter; +import com.beust.jcommander.converters.CommaParameterSplitter; +import com.google.common.annotations.VisibleForTesting; +import com.google.common.base.Functions; +import com.google.common.util.concurrent.UncheckedExecutionException; +import java.io.IOException; +import java.net.URI; +import java.util.Collections; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.NavigableSet; +import java.util.TreeSet; +import java.util.concurrent.ConcurrentSkipListSet; +import java.util.concurrent.CountDownLatch; +import java.util.stream.Collectors; +import java.util.stream.IntStream; +import lombok.Cleanup; +import lombok.Setter; +import lombok.experimental.Accessors; +import org.apache.bookkeeper.bookie.BookieException; +import org.apache.bookkeeper.client.BKException; +import org.apache.bookkeeper.client.BookKeeper; +import org.apache.bookkeeper.client.BookKeeperAdmin; +import org.apache.bookkeeper.client.EnsemblePlacementPolicy; +import org.apache.bookkeeper.client.LedgerFragment; +import org.apache.bookkeeper.client.api.LedgerMetadata; +import org.apache.bookkeeper.conf.ClientConfiguration; +import org.apache.bookkeeper.conf.ServerConfiguration; +import org.apache.bookkeeper.meta.LedgerManagerFactory; +import org.apache.bookkeeper.meta.LedgerUnderreplicationManager; +import org.apache.bookkeeper.meta.MetadataBookieDriver; +import org.apache.bookkeeper.meta.MetadataDrivers; +import org.apache.bookkeeper.meta.exceptions.MetadataException; +import org.apache.bookkeeper.net.BookieId; +import org.apache.bookkeeper.replication.ReplicationException; +import org.apache.bookkeeper.stats.NullStatsLogger; +import org.apache.bookkeeper.tools.cli.helpers.BookieCommand; +import org.apache.bookkeeper.tools.framework.CliFlags; +import org.apache.bookkeeper.tools.framework.CliSpec; +import org.apache.bookkeeper.util.IOUtils; +import org.apache.commons.configuration.ConfigurationException; +import org.apache.commons.lang3.tuple.Pair; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * Command to relocate ledgers to adhere ensemble placement policy. + */ +public class CorrectEnsemblePlacementCommand extends + BookieCommand<CorrectEnsemblePlacementCommand.CorrectEnsemblePlacementFlags> { + private static final Logger LOG = LoggerFactory.getLogger(CorrectEnsemblePlacementCommand.class); + + private static final String NAME = "correct-ensemble-placement"; + private static final String DESC = "Relocate ledgers to adhere ensemble placement policy."; + + public CorrectEnsemblePlacementCommand() { + this(new CorrectEnsemblePlacementFlags()); + } + + private CorrectEnsemblePlacementCommand(CorrectEnsemblePlacementFlags flags) { + super(CliSpec.<CorrectEnsemblePlacementFlags>newBuilder() + .withName(NAME) + .withDescription(DESC) + .withFlags(flags) + .build()); + } + + /** + * Flags for correct-ensemble-placement command. + */ + @Accessors(fluent = true) + @Setter + public static class CorrectEnsemblePlacementFlags extends CliFlags { + @Parameter(names = { "-l", "--ledgerids" }, + description = "Target ledger IDs to relocate. Multiple can be specified, comma separated.", + splitter = CommaParameterSplitter.class, required = true) + private List<Long> ledgerIds; + + @Parameter(names = { "-dr", "--dryrun" }, + description = "Printing the relocation plan w/o doing actual relocation") + private boolean dryRun; + + @Parameter(names = { "-f", "--force" }, description = "Force relocation without confirmation") + private boolean force; + + @Parameter(names = {"-sk", "--skipOpenLedgers"}, description = "Skip relocating open ledgers") + private boolean skipOpenLedgers; + } + + @Override + public boolean apply(ServerConfiguration conf, CorrectEnsemblePlacementFlags flags) { + try { + if (flags.dryRun) { + LOG.info("The dry-run output could change every time you run" + + " since the selection of bookies replaced includes some randomness."); + } + if (!flags.skipOpenLedgers) { + LOG.warn("Try to relocate also open ledgers. It is not recommended."); + } + try { + if (!flags.force) { + final boolean confirm = + IOUtils.confirmPrompt("Are you sure to relocate target ledgers?"); + if (!confirm) { + LOG.error("Relocation is aborted."); + return false; + } + } + } catch (IOException e) { + LOG.error("Error during relocation", e); + return false; + } + + final ClientConfiguration clientConf = new ClientConfiguration(conf); + final BookKeeper bookKeeper = new BookKeeper(clientConf); + final BookKeeperAdmin admin = new BookKeeperAdmin(clientConf); + return relocate(conf, flags, bookKeeper, admin); + } catch (Exception e) { + throw new UncheckedExecutionException(e.getMessage(), e); + } + } + + @VisibleForTesting + public boolean relocate(ServerConfiguration conf, CorrectEnsemblePlacementFlags flags, + BookKeeper bookKeeper, BookKeeperAdmin admin) throws Exception { + final EnsemblePlacementPolicy placementPolicy = bookKeeper.getPlacementPolicy(); + + @Cleanup + final MetadataBookieDriver metadataDriver = instantiateMetadataDriver(conf); + @Cleanup + final LedgerManagerFactory lmf = metadataDriver.getLedgerManagerFactory(); + @Cleanup + final LedgerUnderreplicationManager lum = lmf.newLedgerUnderreplicationManager(); + + final List<Long> targetLedgers = + flags.ledgerIds.stream().parallel().distinct().filter(ledgerId -> { Review Comment: > What's the reason for 'parallel'? It was no strong reason. > This loop is doing metadata operations, you can kill the zookeeper if you don't throttle properly the requests. I missed that point. I'll remove it. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
