| /** |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.om.snapshot; |
| |
| import org.apache.commons.io.FileUtils; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileUtil; |
| import org.apache.hadoop.hdfs.DFSUtil; |
| import org.apache.hadoop.http.HttpConfig; |
| import org.apache.hadoop.ozone.om.ha.OMNodeDetails; |
| import org.apache.hadoop.hdds.utils.db.DBCheckpoint; |
| import org.apache.hadoop.hdds.utils.db.RocksDBCheckpoint; |
| import org.apache.http.Header; |
| import org.apache.http.HttpEntity; |
| import org.apache.http.HttpResponse; |
| import org.apache.http.client.HttpClient; |
| import org.apache.http.client.config.RequestConfig; |
| import org.apache.http.client.methods.HttpGet; |
| import org.apache.http.impl.client.CloseableHttpClient; |
| import org.apache.http.impl.client.HttpClientBuilder; |
| import org.apache.http.util.EntityUtils; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.TimeUnit; |
| |
| import static java.net.HttpURLConnection.HTTP_CREATED; |
| import static java.net.HttpURLConnection.HTTP_OK; |
| import static org.apache.hadoop.ozone.OzoneConsts.OM_RATIS_SNAPSHOT_INDEX; |
| import static org.apache.hadoop.ozone.om.OMConfigKeys.OZONE_OM_SNAPSHOT_PROVIDER_CONNECTION_TIMEOUT_DEFAULT; |
| import static org.apache.hadoop.ozone.om.OMConfigKeys.OZONE_OM_SNAPSHOT_PROVIDER_REQUEST_TIMEOUT_DEFAULT; |
| import static org.apache.hadoop.ozone.om.OMConfigKeys.OZONE_OM_SNAPSHOT_PROVIDER_REQUEST_TIMEOUT_KEY; |
| import static org.apache.hadoop.ozone.om.OMConfigKeys.OZONE_OM_SNAPSHOT_PROVIDER_CONNECTION_TIMEOUT_KEY; |
| import static org.apache.hadoop.ozone.om.OMConfigKeys.OZONE_OM_SNAPSHOT_PROVIDER_SOCKET_TIMEOUT_DEFAULT; |
| import static org.apache.hadoop.ozone.om.OMConfigKeys.OZONE_OM_SNAPSHOT_PROVIDER_SOCKET_TIMEOUT_KEY; |
| |
| /** |
| * OzoneManagerSnapshotProvider downloads the latest checkpoint from the |
| * leader OM and loads the checkpoint into State Machine. |
| */ |
| public class OzoneManagerSnapshotProvider { |
| |
| private static final Logger LOG = |
| LoggerFactory.getLogger(OzoneManagerSnapshotProvider.class); |
| |
| private final File omSnapshotDir; |
| private Map<String, OMNodeDetails> peerNodesMap; |
| private final HttpConfig.Policy httpPolicy; |
| private final RequestConfig httpRequestConfig; |
| private CloseableHttpClient httpClient; |
| |
| private static final String OM_SNAPSHOT_DB = "om.snapshot.db"; |
| |
| public OzoneManagerSnapshotProvider(Configuration conf, |
| File omRatisSnapshotDir, List<OMNodeDetails> peerNodes) { |
| |
| LOG.info("Initializing OM Snapshot Provider"); |
| this.omSnapshotDir = omRatisSnapshotDir; |
| |
| this.peerNodesMap = new HashMap<>(); |
| for (OMNodeDetails peerNode : peerNodes) { |
| this.peerNodesMap.put(peerNode.getOMNodeId(), peerNode); |
| } |
| |
| this.httpPolicy = DFSUtil.getHttpPolicy(conf); |
| this.httpRequestConfig = getHttpRequestConfig(conf); |
| } |
| |
| private RequestConfig getHttpRequestConfig(Configuration conf) { |
| TimeUnit socketTimeoutUnit = |
| OZONE_OM_SNAPSHOT_PROVIDER_SOCKET_TIMEOUT_DEFAULT.getUnit(); |
| int socketTimeoutMS = (int) conf.getTimeDuration( |
| OZONE_OM_SNAPSHOT_PROVIDER_SOCKET_TIMEOUT_KEY, |
| OZONE_OM_SNAPSHOT_PROVIDER_SOCKET_TIMEOUT_DEFAULT.getDuration(), |
| socketTimeoutUnit); |
| |
| TimeUnit connectionTimeoutUnit = |
| OZONE_OM_SNAPSHOT_PROVIDER_CONNECTION_TIMEOUT_DEFAULT.getUnit(); |
| int connectionTimeoutMS = (int) conf.getTimeDuration( |
| OZONE_OM_SNAPSHOT_PROVIDER_CONNECTION_TIMEOUT_KEY, |
| OZONE_OM_SNAPSHOT_PROVIDER_CONNECTION_TIMEOUT_DEFAULT.getDuration(), |
| connectionTimeoutUnit); |
| |
| TimeUnit requestTimeoutUnit = |
| OZONE_OM_SNAPSHOT_PROVIDER_REQUEST_TIMEOUT_DEFAULT.getUnit(); |
| int requestTimeoutMS = (int) conf.getTimeDuration( |
| OZONE_OM_SNAPSHOT_PROVIDER_REQUEST_TIMEOUT_KEY, |
| OZONE_OM_SNAPSHOT_PROVIDER_REQUEST_TIMEOUT_DEFAULT.getDuration(), |
| requestTimeoutUnit); |
| |
| RequestConfig requestConfig = RequestConfig.custom() |
| .setSocketTimeout(socketTimeoutMS) |
| .setConnectTimeout(connectionTimeoutMS) |
| .setConnectionRequestTimeout(requestTimeoutMS) |
| .build(); |
| |
| return requestConfig; |
| } |
| |
| /** |
| * Create and return http client object. |
| */ |
| private HttpClient getHttpClient() { |
| if (httpClient == null) { |
| httpClient = HttpClientBuilder |
| .create() |
| .setDefaultRequestConfig(httpRequestConfig) |
| .build(); |
| } |
| return httpClient; |
| } |
| |
| /** |
| * Close http client object. |
| */ |
| private void closeHttpClient() throws IOException { |
| if (httpClient != null) { |
| httpClient.close(); |
| httpClient = null; |
| } |
| } |
| |
| /** |
| * Download the latest checkpoint from OM Leader via HTTP. |
| * @param leaderOMNodeID leader OM Node ID. |
| * @return the DB checkpoint (including the ratis snapshot index) |
| */ |
| public DBCheckpoint getOzoneManagerDBSnapshot(String leaderOMNodeID) |
| throws IOException { |
| String snapshotFileName = OM_SNAPSHOT_DB + "_" + System.currentTimeMillis(); |
| File targetFile = new File(omSnapshotDir, snapshotFileName + ".tar.gz"); |
| |
| String omCheckpointUrl = peerNodesMap.get(leaderOMNodeID) |
| .getOMDBCheckpointEnpointUrl(httpPolicy); |
| |
| LOG.info("Downloading latest checkpoint from Leader OM {}. Checkpoint " + |
| "URL: {}", leaderOMNodeID, omCheckpointUrl); |
| |
| try { |
| HttpGet httpGet = new HttpGet(omCheckpointUrl); |
| HttpResponse response = getHttpClient().execute(httpGet); |
| int errorCode = response.getStatusLine().getStatusCode(); |
| HttpEntity entity = response.getEntity(); |
| |
| if ((errorCode == HTTP_OK) || (errorCode == HTTP_CREATED)) { |
| |
| Header header = response.getFirstHeader(OM_RATIS_SNAPSHOT_INDEX); |
| if (header == null) { |
| throw new IOException("The HTTP response header " + |
| OM_RATIS_SNAPSHOT_INDEX + " is missing."); |
| } |
| |
| long snapshotIndex = Long.parseLong(header.getValue()); |
| |
| try (InputStream inputStream = entity.getContent()) { |
| FileUtils.copyInputStreamToFile(inputStream, targetFile); |
| } |
| |
| // Untar the checkpoint file. |
| Path untarredDbDir = Paths.get(omSnapshotDir.getAbsolutePath(), |
| snapshotFileName); |
| FileUtil.unTar(targetFile, untarredDbDir.toFile()); |
| FileUtils.deleteQuietly(targetFile); |
| |
| LOG.info("Sucessfully downloaded latest checkpoint with snapshot " + |
| "index {} from leader OM: {}", snapshotIndex, leaderOMNodeID); |
| |
| RocksDBCheckpoint omCheckpoint = new RocksDBCheckpoint(untarredDbDir); |
| omCheckpoint.setRatisSnapshotIndex(snapshotIndex); |
| return omCheckpoint; |
| } |
| |
| if (entity != null) { |
| throw new IOException("Unexpected exception when trying to reach " + |
| "OM to download latest checkpoint. Checkpoint URL: " + |
| omCheckpointUrl + ". Entity: " + EntityUtils.toString(entity)); |
| } else { |
| throw new IOException("Unexpected null in http payload, while " + |
| "processing request to OM to download latest checkpoint. " + |
| "Checkpoint Url: " + omCheckpointUrl); |
| } |
| } finally { |
| closeHttpClient(); |
| } |
| } |
| } |