| /** |
| * 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.container.common.states.datanode; |
| |
| import com.google.common.base.Strings; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hdds.protocol.DatanodeDetails; |
| import org.apache.hadoop.hdds.scm.HddsServerUtil; |
| import org.apache.hadoop.hdds.scm.ScmConfigKeys; |
| import org.apache.hadoop.ozone.container.common.helpers.ContainerUtils; |
| import org.apache.hadoop.ozone.container.common.statemachine |
| .DatanodeStateMachine; |
| import org.apache.hadoop.ozone.container.common.statemachine |
| .SCMConnectionManager; |
| import org.apache.hadoop.ozone.container.common.statemachine.StateContext; |
| import org.apache.hadoop.ozone.container.common.states.DatanodeState; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| import java.util.Collection; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| |
| import static org.apache.hadoop.hdds.HddsUtils.getSCMAddresses; |
| |
| /** |
| * Init Datanode State is the task that gets run when we are in Init State. |
| */ |
| public class InitDatanodeState implements DatanodeState, |
| Callable<DatanodeStateMachine.DatanodeStates> { |
| static final Logger LOG = LoggerFactory.getLogger(InitDatanodeState.class); |
| private final SCMConnectionManager connectionManager; |
| private final Configuration conf; |
| private final StateContext context; |
| private Future<DatanodeStateMachine.DatanodeStates> result; |
| |
| /** |
| * Create InitDatanodeState Task. |
| * |
| * @param conf - Conf |
| * @param connectionManager - Connection Manager |
| * @param context - Current Context |
| */ |
| public InitDatanodeState(Configuration conf, |
| SCMConnectionManager connectionManager, |
| StateContext context) { |
| this.conf = conf; |
| this.connectionManager = connectionManager; |
| this.context = context; |
| } |
| |
| /** |
| * Computes a result, or throws an exception if unable to do so. |
| * |
| * @return computed result |
| * @throws Exception if unable to compute a result |
| */ |
| @Override |
| public DatanodeStateMachine.DatanodeStates call() throws Exception { |
| Collection<InetSocketAddress> addresses = null; |
| try { |
| addresses = getSCMAddresses(conf); |
| } catch (IllegalArgumentException e) { |
| if(!Strings.isNullOrEmpty(e.getMessage())) { |
| LOG.error("Failed to get SCM addresses: " + e.getMessage()); |
| } |
| return DatanodeStateMachine.DatanodeStates.SHUTDOWN; |
| } |
| |
| if (addresses == null || addresses.isEmpty()) { |
| LOG.error("Null or empty SCM address list found."); |
| return DatanodeStateMachine.DatanodeStates.SHUTDOWN; |
| } else { |
| for (InetSocketAddress addr : addresses) { |
| if (addr.isUnresolved()) { |
| LOG.warn("One SCM address ({}) can't (yet?) be resolved. Postpone " |
| + "initialization.", addr); |
| |
| //skip any further initialization. DatanodeStateMachine will try it |
| // again after the hb frequency |
| return this.context.getState(); |
| } |
| } |
| for (InetSocketAddress addr : addresses) { |
| connectionManager.addSCMServer(addr); |
| } |
| } |
| |
| // If datanode ID is set, persist it to the ID file. |
| persistContainerDatanodeDetails(); |
| |
| return this.context.getState().getNextState(); |
| } |
| |
| /** |
| * Persist DatanodeDetails to datanode.id file. |
| */ |
| private void persistContainerDatanodeDetails() { |
| String dataNodeIDPath = HddsServerUtil.getDatanodeIdFilePath(conf); |
| if (Strings.isNullOrEmpty(dataNodeIDPath)) { |
| LOG.error("A valid path is needed for config setting {}", |
| ScmConfigKeys.OZONE_SCM_DATANODE_ID_DIR); |
| this.context.setState(DatanodeStateMachine.DatanodeStates.SHUTDOWN); |
| return; |
| } |
| File idPath = new File(dataNodeIDPath); |
| DatanodeDetails datanodeDetails = this.context.getParent() |
| .getDatanodeDetails(); |
| if (datanodeDetails != null && !idPath.exists()) { |
| try { |
| ContainerUtils.writeDatanodeDetailsTo(datanodeDetails, idPath); |
| } catch (IOException ex) { |
| // As writing DatanodeDetails in to datanodeid file failed, which is |
| // a critical thing, so shutting down the state machine. |
| LOG.error("Writing to {} failed {}", dataNodeIDPath, ex.getMessage()); |
| this.context.setState(DatanodeStateMachine.DatanodeStates.SHUTDOWN); |
| return; |
| } |
| LOG.info("DatanodeDetails is persisted to {}", dataNodeIDPath); |
| } |
| } |
| |
| /** |
| * Called before entering this state. |
| */ |
| @Override |
| public void onEnter() { |
| LOG.trace("Entering init container state"); |
| } |
| |
| /** |
| * Called After exiting this state. |
| */ |
| @Override |
| public void onExit() { |
| LOG.trace("Exiting init container state"); |
| } |
| |
| /** |
| * Executes one or more tasks that is needed by this state. |
| * |
| * @param executor - ExecutorService |
| */ |
| @Override |
| public void execute(ExecutorService executor) { |
| result = executor.submit(this); |
| } |
| |
| /** |
| * Wait for execute to finish. |
| * |
| * @param time - Time |
| * @param timeUnit - Unit of time. |
| */ |
| @Override |
| public DatanodeStateMachine.DatanodeStates await(long time, |
| TimeUnit timeUnit) throws InterruptedException, |
| ExecutionException, TimeoutException { |
| return result.get(time, timeUnit); |
| } |
| } |