| /* |
| * 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.container.replication; |
| |
| import java.io.IOException; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| import java.security.cert.X509Certificate; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.concurrent.CompletableFuture; |
| |
| import org.apache.hadoop.hdds.conf.ConfigurationSource; |
| import org.apache.hadoop.hdds.protocol.DatanodeDetails; |
| import org.apache.hadoop.hdds.protocol.DatanodeDetails.Port.Name; |
| import org.apache.hadoop.hdds.security.x509.SecurityConfig; |
| import org.apache.hadoop.ozone.OzoneConfigKeys; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import org.jetbrains.annotations.NotNull; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Simple ContainerDownloaderImplementation to download the missing container |
| * from the first available datanode. |
| * <p> |
| * This is not the most effective implementation as it uses only one source |
| * for he container download. |
| */ |
| public class SimpleContainerDownloader implements ContainerDownloader { |
| |
| private static final Logger LOG = |
| LoggerFactory.getLogger(SimpleContainerDownloader.class); |
| |
| private final Path workingDirectory; |
| private final SecurityConfig securityConfig; |
| private final X509Certificate caCert; |
| |
| public SimpleContainerDownloader( |
| ConfigurationSource conf, |
| X509Certificate caCert |
| ) { |
| |
| String workDirString = |
| conf.get(OzoneConfigKeys.OZONE_CONTAINER_COPY_WORKDIR); |
| |
| if (workDirString == null) { |
| workingDirectory = Paths.get(System.getProperty("java.io.tmpdir")) |
| .resolve("container-copy"); |
| } else { |
| workingDirectory = Paths.get(workDirString); |
| } |
| securityConfig = new SecurityConfig(conf); |
| this.caCert = caCert; |
| } |
| |
| @Override |
| public CompletableFuture<Path> getContainerDataFromReplicas( |
| long containerId, |
| List<DatanodeDetails> sourceDatanodes |
| ) { |
| |
| CompletableFuture<Path> result = null; |
| |
| final List<DatanodeDetails> shuffledDatanodes = |
| shuffleDatanodes(sourceDatanodes); |
| |
| for (DatanodeDetails datanode : shuffledDatanodes) { |
| try { |
| if (result == null) { |
| result = downloadContainer(containerId, datanode); |
| } else { |
| |
| result = result.exceptionally(t -> { |
| LOG.error("Error on replicating container: " + containerId, t); |
| try { |
| return downloadContainer(containerId, datanode).join(); |
| } catch (Exception e) { |
| LOG.error("Error on replicating container: " + containerId, |
| e); |
| return null; |
| } |
| }); |
| } |
| } catch (Exception ex) { |
| LOG.error(String.format( |
| "Container %s download from datanode %s was unsuccessful. " |
| + "Trying the next datanode", containerId, datanode), ex); |
| } |
| } |
| return result; |
| |
| } |
| |
| //There is a chance for the download is successful but import is failed, |
| //due to data corruption. We need a random selected datanode to have a |
| //chance to succeed next time. |
| @NotNull |
| protected List<DatanodeDetails> shuffleDatanodes( |
| List<DatanodeDetails> sourceDatanodes |
| ) { |
| |
| final ArrayList<DatanodeDetails> shuffledDatanodes = |
| new ArrayList<>(sourceDatanodes); |
| |
| Collections.shuffle(shuffledDatanodes); |
| |
| return shuffledDatanodes; |
| } |
| |
| @VisibleForTesting |
| protected CompletableFuture<Path> downloadContainer( |
| long containerId, |
| DatanodeDetails datanode |
| ) throws IOException { |
| CompletableFuture<Path> result; |
| GrpcReplicationClient grpcReplicationClient = |
| new GrpcReplicationClient(datanode.getIpAddress(), |
| datanode.getPort(Name.REPLICATION).getValue(), |
| workingDirectory, securityConfig, caCert); |
| result = grpcReplicationClient.download(containerId) |
| .thenApply(r -> { |
| try { |
| grpcReplicationClient.close(); |
| } catch (Exception e) { |
| LOG.error("Couldn't close Grpc replication client", e); |
| } |
| return r; |
| }); |
| |
| return result; |
| } |
| |
| @Override |
| public void close() { |
| // noop |
| } |
| } |