| /** |
| * 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.hdfs.server.namenode.ha; |
| |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| import java.net.URI; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.CommonConfigurationKeysPublic; |
| import org.apache.hadoop.ha.HAServiceProtocol.HAServiceState; |
| import org.apache.hadoop.hdfs.DFSUtilClient; |
| import org.apache.hadoop.hdfs.HAUtilClient; |
| import org.apache.hadoop.hdfs.client.HdfsClientConfigKeys; |
| import org.apache.hadoop.io.retry.FailoverProxyProvider; |
| import org.apache.hadoop.security.UserGroupInformation; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public abstract class AbstractNNFailoverProxyProvider<T> implements |
| FailoverProxyProvider <T> { |
| protected static final Logger LOG = |
| LoggerFactory.getLogger(AbstractNNFailoverProxyProvider.class); |
| |
| protected Configuration conf; |
| protected Class<T> xface; |
| protected HAProxyFactory<T> factory; |
| protected UserGroupInformation ugi; |
| protected AtomicBoolean fallbackToSimpleAuth; |
| |
| protected AbstractNNFailoverProxyProvider() { |
| } |
| |
| protected AbstractNNFailoverProxyProvider(Configuration conf, URI uri, |
| Class<T> xface, HAProxyFactory<T> factory) { |
| this.conf = new Configuration(conf); |
| this.xface = xface; |
| this.factory = factory; |
| try { |
| this.ugi = UserGroupInformation.getCurrentUser(); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| |
| int maxRetries = this.conf.getInt( |
| HdfsClientConfigKeys.Failover.CONNECTION_RETRIES_KEY, |
| HdfsClientConfigKeys.Failover.CONNECTION_RETRIES_DEFAULT); |
| this.conf.setInt( |
| CommonConfigurationKeysPublic.IPC_CLIENT_CONNECT_MAX_RETRIES_KEY, |
| maxRetries); |
| |
| int maxRetriesOnSocketTimeouts = this.conf.getInt( |
| HdfsClientConfigKeys |
| .Failover.CONNECTION_RETRIES_ON_SOCKET_TIMEOUTS_KEY, |
| HdfsClientConfigKeys |
| .Failover.CONNECTION_RETRIES_ON_SOCKET_TIMEOUTS_DEFAULT); |
| this.conf.setInt( |
| CommonConfigurationKeysPublic |
| .IPC_CLIENT_CONNECT_MAX_RETRIES_ON_SOCKET_TIMEOUTS_KEY, |
| maxRetriesOnSocketTimeouts); |
| } |
| |
| /** |
| * Inquire whether logical HA URI is used for the implementation. If it is |
| * used, a special token handling may be needed to make sure a token acquired |
| * from a node in the HA pair can be used against the other node. |
| * |
| * @return true if logical HA URI is used. false, if not used. |
| */ |
| public abstract boolean useLogicalURI(); |
| |
| /** |
| * Set for tracking if a secure client falls back to simple auth. This method |
| * is synchronized only to stifle a Findbugs warning. |
| * |
| * @param fallbackToSimpleAuth - set to true or false during this method to |
| * indicate if a secure client falls back to simple auth |
| */ |
| public synchronized void setFallbackToSimpleAuth( |
| AtomicBoolean fallbackToSimpleAuth) { |
| this.fallbackToSimpleAuth = fallbackToSimpleAuth; |
| } |
| |
| public synchronized AtomicBoolean getFallbackToSimpleAuth() { |
| return fallbackToSimpleAuth; |
| } |
| |
| /** |
| * ProxyInfo to a NameNode. Includes its address. |
| */ |
| public static class NNProxyInfo<T> extends ProxyInfo<T> { |
| private InetSocketAddress address; |
| /** |
| * The currently known state of the NameNode represented by this ProxyInfo. |
| * This may be out of date if the NameNode has changed state since the last |
| * time the state was checked. If the NameNode could not be contacted, this |
| * will store null to indicate an unknown state. |
| */ |
| private HAServiceState cachedState; |
| |
| public NNProxyInfo(InetSocketAddress address) { |
| super(null, address.toString()); |
| this.address = address; |
| } |
| |
| public InetSocketAddress getAddress() { |
| return address; |
| } |
| |
| public void setCachedState(HAServiceState state) { |
| cachedState = state; |
| } |
| |
| public HAServiceState getCachedState() { |
| return cachedState; |
| } |
| } |
| |
| @Override |
| public Class<T> getInterface() { |
| return xface; |
| } |
| |
| /** |
| * Create a proxy if it has not been created yet. |
| */ |
| protected NNProxyInfo<T> createProxyIfNeeded(NNProxyInfo<T> pi) { |
| if (pi.proxy == null) { |
| assert pi.getAddress() != null : "Proxy address is null"; |
| try { |
| pi.proxy = factory.createProxy(conf, |
| pi.getAddress(), xface, ugi, false, getFallbackToSimpleAuth()); |
| } catch (IOException ioe) { |
| LOG.error("{} Failed to create RPC proxy to NameNode at {}", |
| this.getClass().getSimpleName(), pi.address, ioe); |
| throw new RuntimeException(ioe); |
| } |
| } |
| return pi; |
| } |
| |
| /** |
| * Get list of configured NameNode proxy addresses. |
| * Randomize the list if requested. |
| */ |
| protected List<NNProxyInfo<T>> getProxyAddresses(URI uri, String addressKey) { |
| final List<NNProxyInfo<T>> proxies = new ArrayList<NNProxyInfo<T>>(); |
| Map<String, Map<String, InetSocketAddress>> map = |
| DFSUtilClient.getAddresses(conf, null, addressKey); |
| Map<String, InetSocketAddress> addressesInNN = map.get(uri.getHost()); |
| |
| if (addressesInNN == null || addressesInNN.size() == 0) { |
| throw new RuntimeException("Could not find any configured addresses " + |
| "for URI " + uri); |
| } |
| |
| Collection<InetSocketAddress> addressesOfNns = addressesInNN.values(); |
| for (InetSocketAddress address : addressesOfNns) { |
| proxies.add(new NNProxyInfo<T>(address)); |
| } |
| // Randomize the list to prevent all clients pointing to the same one |
| boolean randomized = getRandomOrder(conf, uri); |
| if (randomized) { |
| Collections.shuffle(proxies); |
| } |
| |
| // The client may have a delegation token set for the logical |
| // URI of the cluster. Clone this token to apply to each of the |
| // underlying IPC addresses so that the IPC code can find it. |
| HAUtilClient.cloneDelegationTokenForLogicalUri(ugi, uri, addressesOfNns); |
| return proxies; |
| } |
| |
| /** |
| * Check whether random order is configured for failover proxy provider |
| * for the namenode/nameservice. |
| * |
| * @param conf Configuration |
| * @param nameNodeUri The URI of namenode/nameservice |
| * @return random order configuration |
| */ |
| public static boolean getRandomOrder( |
| Configuration conf, URI nameNodeUri) { |
| String host = nameNodeUri.getHost(); |
| String configKeyWithHost = HdfsClientConfigKeys.Failover.RANDOM_ORDER |
| + "." + host; |
| |
| if (conf.get(configKeyWithHost) != null) { |
| return conf.getBoolean( |
| configKeyWithHost, |
| HdfsClientConfigKeys.Failover.RANDOM_ORDER_DEFAULT); |
| } |
| |
| return conf.getBoolean( |
| HdfsClientConfigKeys.Failover.RANDOM_ORDER, |
| HdfsClientConfigKeys.Failover.RANDOM_ORDER_DEFAULT); |
| } |
| } |