| /** |
| * 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.yarn.server.nodemanager.containermanager.resourceplugin; |
| |
| import com.google.common.collect.ImmutableSet; |
| import org.apache.commons.lang3.StringUtils; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.yarn.conf.YarnConfiguration; |
| import org.apache.hadoop.yarn.exceptions.YarnException; |
| import org.apache.hadoop.yarn.server.nodemanager.Context; |
| import org.apache.hadoop.yarn.server.nodemanager.containermanager.resourceplugin.gpu.GpuResourcePlugin; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import static org.apache.hadoop.yarn.api.records.ResourceInformation.GPU_URI; |
| |
| /** |
| * Manages {@link ResourcePlugin} configured on this NodeManager. |
| */ |
| public class ResourcePluginManager { |
| private static final Logger LOG = |
| LoggerFactory.getLogger(ResourcePluginManager.class); |
| private static final Set<String> SUPPORTED_RESOURCE_PLUGINS = ImmutableSet.of( |
| GPU_URI); |
| |
| private Map<String, ResourcePlugin> configuredPlugins = Collections.EMPTY_MAP; |
| |
| public synchronized void initialize(Context context) |
| throws YarnException { |
| Configuration conf = context.getConf(); |
| String[] plugins = conf.getStrings(YarnConfiguration.NM_RESOURCE_PLUGINS); |
| |
| if (plugins != null) { |
| Map<String, ResourcePlugin> pluginMap = new HashMap<>(); |
| |
| // Initialize each plugins |
| for (String resourceName : plugins) { |
| resourceName = resourceName.trim(); |
| if (!SUPPORTED_RESOURCE_PLUGINS.contains(resourceName)) { |
| String msg = |
| "Trying to initialize resource plugin with name=" + resourceName |
| + ", it is not supported, list of supported plugins:" |
| + StringUtils.join(",", |
| SUPPORTED_RESOURCE_PLUGINS); |
| LOG.error(msg); |
| throw new YarnException(msg); |
| } |
| |
| if (pluginMap.containsKey(resourceName)) { |
| // Duplicated items, ignore ... |
| continue; |
| } |
| |
| ResourcePlugin plugin = null; |
| if (resourceName.equals(GPU_URI)) { |
| plugin = new GpuResourcePlugin(); |
| } |
| |
| if (plugin == null) { |
| throw new YarnException( |
| "This shouldn't happen, plugin=" + resourceName |
| + " should be loaded and initialized"); |
| } |
| plugin.initialize(context); |
| pluginMap.put(resourceName, plugin); |
| } |
| |
| configuredPlugins = Collections.unmodifiableMap(pluginMap); |
| } |
| } |
| |
| public synchronized void cleanup() throws YarnException { |
| for (ResourcePlugin plugin : configuredPlugins.values()) { |
| plugin.cleanup(); |
| } |
| } |
| |
| /** |
| * Get resource name (such as gpu/fpga) to plugin references. |
| * @return read-only map of resource name to plugins. |
| */ |
| public synchronized Map<String, ResourcePlugin> getNameToPlugins() { |
| return configuredPlugins; |
| } |
| } |