| /* |
| * 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.accumulo.tracer; |
| |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| import static org.apache.accumulo.fate.util.UtilWaitThread.sleepUninterruptibly; |
| |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| import java.net.ServerSocket; |
| import java.nio.channels.ServerSocketChannel; |
| import java.util.Arrays; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| import org.apache.accumulo.core.Constants; |
| import org.apache.accumulo.core.client.AccumuloClient; |
| import org.apache.accumulo.core.client.AccumuloException; |
| import org.apache.accumulo.core.client.AccumuloSecurityException; |
| import org.apache.accumulo.core.client.BatchWriter; |
| import org.apache.accumulo.core.client.BatchWriterConfig; |
| import org.apache.accumulo.core.client.IteratorSetting; |
| import org.apache.accumulo.core.client.MutationsRejectedException; |
| import org.apache.accumulo.core.client.TableExistsException; |
| import org.apache.accumulo.core.client.TableNotFoundException; |
| import org.apache.accumulo.core.client.impl.AccumuloClientImpl; |
| import org.apache.accumulo.core.client.security.tokens.AuthenticationToken; |
| import org.apache.accumulo.core.client.security.tokens.AuthenticationToken.Properties; |
| import org.apache.accumulo.core.client.security.tokens.KerberosToken; |
| import org.apache.accumulo.core.client.security.tokens.PasswordToken; |
| import org.apache.accumulo.core.conf.AccumuloConfiguration; |
| import org.apache.accumulo.core.conf.Property; |
| import org.apache.accumulo.core.data.Mutation; |
| import org.apache.accumulo.core.data.Value; |
| import org.apache.accumulo.core.iterators.user.AgeOffFilter; |
| import org.apache.accumulo.fate.zookeeper.IZooReaderWriter; |
| import org.apache.accumulo.fate.zookeeper.ZooUtil.NodeExistsPolicy; |
| import org.apache.accumulo.server.Accumulo; |
| import org.apache.accumulo.server.ServerContext; |
| import org.apache.accumulo.server.ServerOpts; |
| import org.apache.accumulo.server.conf.ServerConfigurationFactory; |
| import org.apache.accumulo.server.metrics.MetricsSystemHelper; |
| import org.apache.accumulo.server.security.SecurityUtil; |
| import org.apache.accumulo.server.util.time.SimpleTimer; |
| import org.apache.accumulo.start.classloader.vfs.AccumuloVFSClassLoader; |
| import org.apache.accumulo.tracer.thrift.RemoteSpan; |
| import org.apache.accumulo.tracer.thrift.SpanReceiver.Iface; |
| import org.apache.accumulo.tracer.thrift.SpanReceiver.Processor; |
| import org.apache.hadoop.io.Text; |
| import org.apache.htrace.Span; |
| import org.apache.thrift.TByteArrayOutputStream; |
| import org.apache.thrift.TException; |
| import org.apache.thrift.protocol.TCompactProtocol; |
| import org.apache.thrift.server.TServer; |
| import org.apache.thrift.server.TThreadPoolServer; |
| import org.apache.thrift.transport.TServerSocket; |
| import org.apache.thrift.transport.TServerTransport; |
| import org.apache.thrift.transport.TTransport; |
| import org.apache.thrift.transport.TTransportException; |
| import org.apache.zookeeper.WatchedEvent; |
| import org.apache.zookeeper.Watcher; |
| import org.apache.zookeeper.Watcher.Event.EventType; |
| import org.apache.zookeeper.Watcher.Event.KeeperState; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class TraceServer implements Watcher { |
| |
| private static final Logger log = LoggerFactory.getLogger(TraceServer.class); |
| private final ServerConfigurationFactory serverConfiguration; |
| private final ServerContext context; |
| private final TServer server; |
| private final AtomicReference<BatchWriter> writer; |
| private final AccumuloClient accumuloClient; |
| final String tableName; |
| private static final int BATCH_WRITER_MAX_LATENCY = 5; |
| private static final long SCHEDULE_PERIOD = 1000; |
| private static final long SCHEDULE_DELAY = 1000; |
| |
| private static void put(Mutation m, String cf, String cq, byte[] bytes, int len) { |
| m.put(new Text(cf), new Text(cq), new Value(bytes, 0, len)); |
| } |
| |
| static class ByteArrayTransport extends TTransport { |
| TByteArrayOutputStream out = new TByteArrayOutputStream(); |
| |
| @Override |
| public boolean isOpen() { |
| return true; |
| } |
| |
| @Override |
| public void open() throws TTransportException {} |
| |
| @Override |
| public void close() {} |
| |
| @Override |
| public int read(byte[] buf, int off, int len) { |
| return 0; |
| } |
| |
| @Override |
| public void write(byte[] buf, int off, int len) throws TTransportException { |
| out.write(buf, off, len); |
| } |
| |
| public byte[] get() { |
| return out.get(); |
| } |
| |
| public int len() { |
| return out.len(); |
| } |
| } |
| |
| class Receiver implements Iface { |
| @Override |
| public void span(RemoteSpan s) throws TException { |
| String idString = Long.toHexString(s.traceId); |
| String startString = Long.toHexString(s.start); |
| Mutation spanMutation = new Mutation(new Text(idString)); |
| Mutation indexMutation = new Mutation(new Text("idx:" + s.svc + ":" + startString)); |
| long diff = s.stop - s.start; |
| indexMutation.put(new Text(s.description), new Text(s.sender), |
| new Value((idString + ":" + Long.toHexString(diff)).getBytes(UTF_8))); |
| ByteArrayTransport transport = new ByteArrayTransport(); |
| TCompactProtocol protocol = new TCompactProtocol(transport); |
| s.write(protocol); |
| String parentString = Long.toHexString(s.parentId); |
| if (s.parentId == Span.ROOT_SPAN_ID) |
| parentString = ""; |
| put(spanMutation, "span", parentString + ":" + Long.toHexString(s.spanId), transport.get(), |
| transport.len()); |
| // Map the root span to time so we can look up traces by time |
| Mutation timeMutation = null; |
| if (s.parentId == Span.ROOT_SPAN_ID) { |
| timeMutation = new Mutation(new Text("start:" + startString)); |
| put(timeMutation, "id", idString, transport.get(), transport.len()); |
| } |
| try { |
| final BatchWriter writer = TraceServer.this.writer.get(); |
| /* |
| * Check for null, because we expect spans to come in much faster than flush calls. In the |
| * case of failure, we'd rather avoid logging tons of NPEs. |
| */ |
| if (null == writer) { |
| log.warn("writer is not ready; discarding span."); |
| return; |
| } |
| writer.addMutation(spanMutation); |
| writer.addMutation(indexMutation); |
| if (timeMutation != null) |
| writer.addMutation(timeMutation); |
| } catch (MutationsRejectedException exception) { |
| log.warn("Unable to write mutation to table; discarding span. set log" |
| + " level to DEBUG for span information and stacktrace. cause: " + exception); |
| if (log.isDebugEnabled()) { |
| log.debug("discarded span due to rejection of mutation: " + spanMutation, exception); |
| } |
| /* |
| * XXX this could be e.g. an IllegalArgumentException if we're trying to write this mutation |
| * to a writer that has been closed since we retrieved it |
| */ |
| } catch (RuntimeException exception) { |
| log.warn("Unable to write mutation to table; discarding span. set log" |
| + " level to DEBUG for stacktrace. cause: " + exception); |
| log.debug("unable to write mutation to table due to exception.", exception); |
| } |
| } |
| |
| } |
| |
| public TraceServer(ServerContext context, String hostname) throws Exception { |
| this.context = context; |
| this.serverConfiguration = context.getServerConfFactory(); |
| log.info("Version {}", Constants.VERSION); |
| log.info("Instance {}", context.getInstanceID()); |
| AccumuloConfiguration conf = serverConfiguration.getSystemConfiguration(); |
| tableName = conf.get(Property.TRACE_TABLE); |
| accumuloClient = ensureTraceTableExists(conf); |
| |
| int ports[] = conf.getPort(Property.TRACE_PORT); |
| ServerSocket sock = null; |
| for (int port : ports) { |
| ServerSocket s = ServerSocketChannel.open().socket(); |
| s.setReuseAddress(true); |
| try { |
| s.bind(new InetSocketAddress(hostname, port)); |
| sock = s; |
| break; |
| } catch (Exception e) { |
| log.warn("Unable to start trace server on port {}", port); |
| } |
| } |
| if (null == sock) { |
| throw new RuntimeException( |
| "Unable to start trace server on configured ports: " + Arrays.toString(ports)); |
| } |
| final TServerTransport transport = new TServerSocket(sock); |
| TThreadPoolServer.Args options = new TThreadPoolServer.Args(transport); |
| options.processor(new Processor<Iface>(new Receiver())); |
| server = new TThreadPoolServer(options); |
| registerInZooKeeper(sock.getInetAddress().getHostAddress() + ":" + sock.getLocalPort(), |
| conf.get(Property.TRACE_ZK_PATH)); |
| writer = new AtomicReference<>(this.accumuloClient.createBatchWriter(tableName, |
| new BatchWriterConfig().setMaxLatency(BATCH_WRITER_MAX_LATENCY, TimeUnit.SECONDS))); |
| } |
| |
| /** |
| * Exceptions thrown out of here should be things that cause service failure (e.g. |
| * misconfigurations that aren't likely to change on retry). |
| * |
| * @return a working Connection that can be reused |
| * @throws ClassNotFoundException |
| * if TRACE_TOKEN_TYPE is set to a class that we can't load. |
| * @throws InstantiationException |
| * if we fail to create an instance of TRACE_TOKEN_TYPE. |
| * @throws IllegalAccessException |
| * if the class pointed to by TRACE_TOKEN_TYPE is private. |
| * @throws AccumuloSecurityException |
| * if the trace user has the wrong permissions |
| */ |
| private AccumuloClient ensureTraceTableExists(final AccumuloConfiguration conf) |
| throws AccumuloSecurityException, ClassNotFoundException, InstantiationException, |
| IllegalAccessException { |
| AccumuloClient accumuloClient = null; |
| while (true) { |
| try { |
| final boolean isDefaultTokenType = conf.get(Property.TRACE_TOKEN_TYPE) |
| .equals(Property.TRACE_TOKEN_TYPE.getDefaultValue()); |
| String principal = conf.get(Property.TRACE_USER); |
| if (conf.getBoolean(Property.INSTANCE_RPC_SASL_ENABLED)) { |
| // Make sure that we replace _HOST if it exists in the principal |
| principal = SecurityUtil.getServerPrincipal(principal); |
| } |
| AuthenticationToken at; |
| Map<String,String> loginMap = conf |
| .getAllPropertiesWithPrefix(Property.TRACE_TOKEN_PROPERTY_PREFIX); |
| if (loginMap.isEmpty() && isDefaultTokenType) { |
| // Assume the old type of user/password specification |
| Property p = Property.TRACE_PASSWORD; |
| at = new PasswordToken(conf.get(p).getBytes(UTF_8)); |
| } else { |
| Properties props = new Properties(); |
| AuthenticationToken token = AccumuloVFSClassLoader.getClassLoader() |
| .loadClass(conf.get(Property.TRACE_TOKEN_TYPE)).asSubclass(AuthenticationToken.class) |
| .newInstance(); |
| |
| int prefixLength = Property.TRACE_TOKEN_PROPERTY_PREFIX.getKey().length(); |
| for (Entry<String,String> entry : loginMap.entrySet()) { |
| props.put(entry.getKey().substring(prefixLength), entry.getValue()); |
| } |
| |
| token.init(props); |
| |
| at = token; |
| } |
| |
| accumuloClient = new AccumuloClientImpl.AccumuloClientBuilderImpl() |
| .usingClientInfo(context.getClientInfo()).usingToken(principal, at).build(); |
| if (!accumuloClient.tableOperations().exists(tableName)) { |
| accumuloClient.tableOperations().create(tableName); |
| IteratorSetting setting = new IteratorSetting(10, "ageoff", AgeOffFilter.class.getName()); |
| AgeOffFilter.setTTL(setting, 7 * 24 * 60 * 60 * 1000L); |
| accumuloClient.tableOperations().attachIterator(tableName, setting); |
| } |
| accumuloClient.tableOperations().setProperty(tableName, |
| Property.TABLE_FORMATTER_CLASS.getKey(), TraceFormatter.class.getName()); |
| break; |
| } catch (AccumuloException | TableExistsException | TableNotFoundException | IOException |
| | RuntimeException ex) { |
| log.info("Waiting to checking/create the trace table.", ex); |
| sleepUninterruptibly(1, TimeUnit.SECONDS); |
| } |
| } |
| return accumuloClient; |
| } |
| |
| public void run() throws Exception { |
| SimpleTimer.getInstance(serverConfiguration.getSystemConfiguration()).schedule(new Runnable() { |
| @Override |
| public void run() { |
| flush(); |
| } |
| }, SCHEDULE_DELAY, SCHEDULE_PERIOD); |
| server.serve(); |
| } |
| |
| private void flush() { |
| try { |
| final BatchWriter writer = this.writer.get(); |
| if (null != writer) { |
| writer.flush(); |
| } else { |
| // We don't have a writer. If the table exists, try to make a new writer. |
| if (accumuloClient.tableOperations().exists(tableName)) { |
| resetWriter(); |
| } |
| } |
| } catch (MutationsRejectedException | RuntimeException exception) { |
| log.warn("Problem flushing traces, resetting writer. Set log level to" |
| + " DEBUG to see stacktrace. cause: " + exception); |
| log.debug("flushing traces failed due to exception", exception); |
| resetWriter(); |
| /* XXX e.g. if the writer was closed between when we grabbed it and when we called flush. */ |
| } |
| } |
| |
| private void resetWriter() { |
| BatchWriter writer = null; |
| try { |
| writer = accumuloClient.createBatchWriter(tableName, |
| new BatchWriterConfig().setMaxLatency(BATCH_WRITER_MAX_LATENCY, TimeUnit.SECONDS)); |
| } catch (Exception ex) { |
| log.warn("Unable to create a batch writer, will retry. Set log level to" |
| + " DEBUG to see stacktrace. cause: " + ex); |
| log.debug("batch writer creation failed with exception.", ex); |
| } finally { |
| /* Trade in the new writer (even if null) for the one we need to close. */ |
| writer = this.writer.getAndSet(writer); |
| try { |
| if (null != writer) { |
| writer.close(); |
| } |
| } catch (Exception ex) { |
| log.warn( |
| "Problem closing batch writer. Set log level to DEBUG to see stacktrace. cause: " + ex); |
| log.debug("batch writer close failed with exception", ex); |
| } |
| } |
| } |
| |
| private void registerInZooKeeper(String name, String root) throws Exception { |
| IZooReaderWriter zoo = context.getZooReaderWriter(); |
| zoo.putPersistentData(root, new byte[0], NodeExistsPolicy.SKIP); |
| log.info("Registering tracer {} at {}", name, root); |
| String path = zoo.putEphemeralSequential(root + "/trace-", name.getBytes(UTF_8)); |
| zoo.exists(path, this); |
| } |
| |
| private static void loginTracer(AccumuloConfiguration acuConf) { |
| try { |
| Class<? extends AuthenticationToken> traceTokenType = AccumuloVFSClassLoader.getClassLoader() |
| .loadClass(acuConf.get(Property.TRACE_TOKEN_TYPE)).asSubclass(AuthenticationToken.class); |
| |
| if (!(KerberosToken.class.isAssignableFrom(traceTokenType))) { |
| // We're not using Kerberos to talk to Accumulo, but we might still need it for talking to |
| // HDFS/ZK for |
| // instance information. |
| log.info("Handling login under the assumption that Accumulo users are not using Kerberos."); |
| SecurityUtil.serverLogin(acuConf); |
| } else { |
| // We're using Kerberos to talk to Accumulo, so check for trace user specific auth details. |
| // We presume this same user will have the needed access for the service to interact with |
| // HDFS/ZK for |
| // instance information. |
| log.info("Handling login under the assumption that Accumulo users are using Kerberos."); |
| Map<String,String> loginMap = acuConf |
| .getAllPropertiesWithPrefix(Property.TRACE_TOKEN_PROPERTY_PREFIX); |
| String keyTab = loginMap.get(Property.TRACE_TOKEN_PROPERTY_PREFIX.getKey() + "keytab"); |
| if (keyTab == null || keyTab.length() == 0) { |
| keyTab = acuConf.getPath(Property.GENERAL_KERBEROS_KEYTAB); |
| } |
| if (keyTab == null || keyTab.length() == 0) |
| return; |
| |
| String principalConfig = acuConf.get(Property.TRACE_USER); |
| if (principalConfig == null || principalConfig.length() == 0) |
| return; |
| |
| log.info("Attempting to login as {} with {}", principalConfig, keyTab); |
| SecurityUtil.serverLogin(acuConf, keyTab, principalConfig); |
| } |
| } catch (IOException | ClassNotFoundException exception) { |
| final String msg = String.format( |
| "Failed to retrieve trace user token information based on property %1s.", |
| Property.TRACE_TOKEN_TYPE); |
| log.error(msg, exception); |
| throw new RuntimeException(msg, exception); |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| final String app = "tracer"; |
| ServerOpts opts = new ServerOpts(); |
| opts.parseArgs(app, args); |
| ServerContext context = new ServerContext(opts.getSiteConfiguration()); |
| loginTracer(context.getConfiguration()); |
| MetricsSystemHelper.configure(TraceServer.class.getSimpleName()); |
| Accumulo.init(context, app); |
| TraceServer server = new TraceServer(context, opts.getAddress()); |
| try { |
| server.run(); |
| } finally { |
| log.info("tracer stopping"); |
| context.getZooReaderWriter().getZooKeeper().close(); |
| } |
| } |
| |
| @Override |
| public void process(WatchedEvent event) { |
| log.debug("event {} {} {}", event.getPath(), event.getType(), event.getState()); |
| if (event.getState() == KeeperState.Expired) { |
| log.warn("Trace server lost zookeeper registration at {} ", event.getPath()); |
| server.stop(); |
| } else if (event.getType() == EventType.NodeDeleted) { |
| log.warn("Trace server zookeeper entry lost {}", event.getPath()); |
| server.stop(); |
| } |
| if (event.getPath() != null) { |
| try { |
| if (context.getZooReaderWriter().exists(event.getPath(), this)) |
| return; |
| } catch (Exception ex) { |
| log.error("{}", ex.getMessage(), ex); |
| } |
| log.warn("Trace server unable to reset watch on zookeeper registration"); |
| server.stop(); |
| } |
| } |
| |
| } |
