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| 1 | +/** |
| 2 | + * Licensed to the Apache Software Foundation (ASF) under one |
| 3 | + * or more contributor license agreements. See the NOTICE file |
| 4 | + * distributed with this work for additional information |
| 5 | + * regarding copyright ownership. The ASF licenses this file |
| 6 | + * to you under the Apache License, Version 2.0 (the |
| 7 | + * "License"); you may not use this file except in compliance |
| 8 | + * with the License. You may obtain a copy of the License at |
| 9 | + * |
| 10 | + * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | + * |
| 12 | + * Unless required by applicable law or agreed to in writing, software |
| 13 | + * distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | + * See the License for the specific language governing permissions and |
| 16 | + * limitations under the License. |
| 17 | + */ |
| 18 | +package org.apache.hadoop.hdfs.server.federation.router; |
| 19 | + |
| 20 | +import org.apache.hadoop.classification.InterfaceAudience; |
| 21 | +import org.apache.hadoop.classification.InterfaceStability; |
| 22 | +import org.apache.hadoop.conf.Configuration; |
| 23 | +import org.apache.hadoop.fs.Path; |
| 24 | +import org.apache.hadoop.hdfs.server.federation.resolver.RemoteLocation; |
| 25 | +import org.apache.hadoop.tools.fedbalance.DistCpProcedure; |
| 26 | +import org.apache.hadoop.tools.fedbalance.FedBalanceConfigs; |
| 27 | +import org.apache.hadoop.tools.fedbalance.FedBalanceContext; |
| 28 | +import org.apache.hadoop.tools.fedbalance.TrashProcedure; |
| 29 | +import org.apache.hadoop.tools.fedbalance.procedure.BalanceJob; |
| 30 | +import org.apache.hadoop.tools.fedbalance.procedure.BalanceProcedure; |
| 31 | +import org.apache.hadoop.tools.fedbalance.procedure.BalanceProcedureScheduler; |
| 32 | + |
| 33 | +import java.io.IOException; |
| 34 | +import java.util.List; |
| 35 | +import java.util.concurrent.atomic.AtomicInteger; |
| 36 | + |
| 37 | +import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_FEDERATION_RENAME_FORCE_CLOSE_OPEN_FILE; |
| 38 | +import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_FEDERATION_RENAME_FORCE_CLOSE_OPEN_FILE_DEFAULT; |
| 39 | +import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_FEDERATION_RENAME_MAP; |
| 40 | +import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_FEDERATION_RENAME_BANDWIDTH; |
| 41 | +import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_FEDERATION_RENAME_DELAY; |
| 42 | +import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_FEDERATION_RENAME_DELAY_DEFAULT; |
| 43 | +import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_FEDERATION_RENAME_DIFF; |
| 44 | +import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_FEDERATION_RENAME_DIFF_DEFAULT; |
| 45 | +import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_FEDERATION_RENAME_TRASH; |
| 46 | +import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_FEDERATION_RENAME_TRASH_DEFAULT; |
| 47 | +import static org.apache.hadoop.tools.fedbalance.FedBalance.DISTCP_PROCEDURE; |
| 48 | +import static org.apache.hadoop.tools.fedbalance.FedBalance.TRASH_PROCEDURE; |
| 49 | +import static org.apache.hadoop.tools.fedbalance.FedBalance.NO_MOUNT; |
| 50 | + |
| 51 | +import org.slf4j.Logger; |
| 52 | +import org.slf4j.LoggerFactory; |
| 53 | + |
| 54 | +/** |
| 55 | + * Rename across router based federation namespaces. |
| 56 | + */ |
| 57 | +@InterfaceAudience.Private |
| 58 | +@InterfaceStability.Unstable |
| 59 | +public class RouterFederationRename { |
| 60 | + |
| 61 | + private static final Logger LOG = |
| 62 | + LoggerFactory.getLogger(RouterFederationRename.class.getName()); |
| 63 | + private final RouterRpcServer rpcServer; |
| 64 | + private final Configuration conf; |
| 65 | + private final AtomicInteger routerRenameCounter = new AtomicInteger(); |
| 66 | + public enum RouterRenameOption { |
| 67 | + NONE, DISTCP |
| 68 | + } |
| 69 | + |
| 70 | + public RouterFederationRename(RouterRpcServer rpcServer, Configuration conf) { |
| 71 | + this.rpcServer = rpcServer; |
| 72 | + this.conf = conf; |
| 73 | + } |
| 74 | + |
| 75 | + /** |
| 76 | + * Router federation rename across namespaces. |
| 77 | + * |
| 78 | + * @param src the source path. There is no mount point under the src path. |
| 79 | + * @param dst the dst path. |
| 80 | + * @param srcLocations the remote locations of src. |
| 81 | + * @param dstLocations the remote locations of dst. |
| 82 | + * @throws IOException if rename fails. |
| 83 | + * @return true if rename succeeds. |
| 84 | + */ |
| 85 | + boolean routerFedRename(final String src, final String dst, |
| 86 | + final List<RemoteLocation> srcLocations, |
| 87 | + final List<RemoteLocation> dstLocations) throws IOException { |
| 88 | + if (!rpcServer.isEnableRenameAcrossNamespace()) { |
| 89 | + throw new IOException("Rename of " + src + " to " + dst |
| 90 | + + " is not allowed, no eligible destination in the same namespace was" |
| 91 | + + " found"); |
| 92 | + } |
| 93 | + if (srcLocations.size() != 1 || dstLocations.size() != 1) { |
| 94 | + throw new IOException("Rename of " + src + " to " + dst + " is not" |
| 95 | + + " allowed. The remote location should be exactly one."); |
| 96 | + } |
| 97 | + RemoteLocation srcLoc = srcLocations.get(0); |
| 98 | + RemoteLocation dstLoc = dstLocations.get(0); |
| 99 | + // Build and submit router federation rename job. |
| 100 | + BalanceJob job = buildRouterRenameJob(srcLoc.getNameserviceId(), |
| 101 | + dstLoc.getNameserviceId(), srcLoc.getDest(), dstLoc.getDest()); |
| 102 | + BalanceProcedureScheduler scheduler = rpcServer.getFedRenameScheduler(); |
| 103 | + countIncrement(); |
| 104 | + try { |
| 105 | + scheduler.submit(job); |
| 106 | + LOG.info("Rename {} to {} from namespace {} to {}. JobId={}.", src, dst, |
| 107 | + srcLoc.getNameserviceId(), dstLoc.getNameserviceId(), job.getId()); |
| 108 | + scheduler.waitUntilDone(job); |
| 109 | + if (job.getError() != null) { |
| 110 | + throw new IOException("Rename of " + src + " to " + dst + " failed.", |
| 111 | + job.getError()); |
| 112 | + } |
| 113 | + return true; |
| 114 | + } finally { |
| 115 | + countDecrement(); |
| 116 | + } |
| 117 | + } |
| 118 | + |
| 119 | + /** |
| 120 | + * Build router federation rename job moving data from src to dst. |
| 121 | + * @param srcNs the source namespace id. |
| 122 | + * @param dstNs the dst namespace id. |
| 123 | + * @param src the source path. |
| 124 | + * @param dst the dst path. |
| 125 | + */ |
| 126 | + private BalanceJob buildRouterRenameJob(String srcNs, String dstNs, |
| 127 | + String src, String dst) throws IOException { |
| 128 | + checkConfiguration(conf); |
| 129 | + Path srcPath = new Path("hdfs://" + srcNs + src); |
| 130 | + Path dstPath = new Path("hdfs://" + dstNs + dst); |
| 131 | + boolean forceCloseOpen = |
| 132 | + conf.getBoolean(DFS_ROUTER_FEDERATION_RENAME_FORCE_CLOSE_OPEN_FILE, |
| 133 | + DFS_ROUTER_FEDERATION_RENAME_FORCE_CLOSE_OPEN_FILE_DEFAULT); |
| 134 | + int map = conf.getInt(DFS_ROUTER_FEDERATION_RENAME_MAP, -1); |
| 135 | + int bandwidth = conf.getInt(DFS_ROUTER_FEDERATION_RENAME_BANDWIDTH, -1); |
| 136 | + long delay = conf.getLong(DFS_ROUTER_FEDERATION_RENAME_DELAY, |
| 137 | + DFS_ROUTER_FEDERATION_RENAME_DELAY_DEFAULT); |
| 138 | + int diff = conf.getInt(DFS_ROUTER_FEDERATION_RENAME_DIFF, |
| 139 | + DFS_ROUTER_FEDERATION_RENAME_DIFF_DEFAULT); |
| 140 | + String trashPolicy = conf.get(DFS_ROUTER_FEDERATION_RENAME_TRASH, |
| 141 | + DFS_ROUTER_FEDERATION_RENAME_TRASH_DEFAULT); |
| 142 | + FedBalanceConfigs.TrashOption trashOpt = |
| 143 | + FedBalanceConfigs.TrashOption.valueOf(trashPolicy.toUpperCase()); |
| 144 | + // Construct job context. |
| 145 | + FedBalanceContext context = |
| 146 | + new FedBalanceContext.Builder(srcPath, dstPath, NO_MOUNT, conf) |
| 147 | + .setForceCloseOpenFiles(forceCloseOpen) |
| 148 | + .setUseMountReadOnly(true) |
| 149 | + .setMapNum(map) |
| 150 | + .setBandwidthLimit(bandwidth) |
| 151 | + .setTrash(trashOpt) |
| 152 | + .setDelayDuration(delay) |
| 153 | + .setDiffThreshold(diff) |
| 154 | + .build(); |
| 155 | + |
| 156 | + LOG.info(context.toString()); |
| 157 | + // Construct the balance job. |
| 158 | + BalanceJob.Builder<BalanceProcedure> builder = new BalanceJob.Builder<>(); |
| 159 | + DistCpProcedure dcp = |
| 160 | + new DistCpProcedure(DISTCP_PROCEDURE, null, delay, context); |
| 161 | + builder.nextProcedure(dcp); |
| 162 | + TrashProcedure tp = |
| 163 | + new TrashProcedure(TRASH_PROCEDURE, null, delay, context); |
| 164 | + builder.nextProcedure(tp); |
| 165 | + return builder.build(); |
| 166 | + } |
| 167 | + |
| 168 | + public int getRouterFederationRenameCount() { |
| 169 | + return routerRenameCounter.get(); |
| 170 | + } |
| 171 | + |
| 172 | + void countIncrement() { |
| 173 | + routerRenameCounter.incrementAndGet(); |
| 174 | + } |
| 175 | + |
| 176 | + void countDecrement() { |
| 177 | + routerRenameCounter.decrementAndGet(); |
| 178 | + } |
| 179 | + |
| 180 | + static void checkConfiguration(Configuration conf) throws IOException { |
| 181 | + int map = conf.getInt(DFS_ROUTER_FEDERATION_RENAME_MAP, -1); |
| 182 | + int bandwidth = conf.getInt(DFS_ROUTER_FEDERATION_RENAME_BANDWIDTH, -1); |
| 183 | + long delay = conf.getLong(DFS_ROUTER_FEDERATION_RENAME_DELAY, |
| 184 | + DFS_ROUTER_FEDERATION_RENAME_DELAY_DEFAULT); |
| 185 | + int diff = conf.getInt(DFS_ROUTER_FEDERATION_RENAME_DIFF, |
| 186 | + DFS_ROUTER_FEDERATION_RENAME_DIFF_DEFAULT); |
| 187 | + if (map < 0) { |
| 188 | + throw new IOException("map=" + map + " is negative. Please check " |
| 189 | + + DFS_ROUTER_FEDERATION_RENAME_MAP); |
| 190 | + } else if (bandwidth < 0) { |
| 191 | + throw new IOException( |
| 192 | + "bandwidth=" + bandwidth + " is negative. Please check " |
| 193 | + + DFS_ROUTER_FEDERATION_RENAME_BANDWIDTH); |
| 194 | + } else if (delay < 0) { |
| 195 | + throw new IOException("delay=" + delay + " is negative. Please check " |
| 196 | + + DFS_ROUTER_FEDERATION_RENAME_DELAY); |
| 197 | + } else if (diff < 0) { |
| 198 | + throw new IOException("diff=" + diff + " is negative. Please check " |
| 199 | + + DFS_ROUTER_FEDERATION_RENAME_DIFF); |
| 200 | + } |
| 201 | + } |
| 202 | +} |
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