| /** |
| * 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.resourcemanager.scheduler.fair; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.apache.hadoop.classification.InterfaceAudience.Private; |
| import org.apache.hadoop.classification.InterfaceStability.Unstable; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.security.Groups; |
| import org.apache.hadoop.util.ReflectionUtils; |
| import org.w3c.dom.Element; |
| import org.w3c.dom.Node; |
| import org.w3c.dom.NodeList; |
| |
| @Private |
| @Unstable |
| public class QueuePlacementPolicy { |
| private static final Map<String, Class<? extends QueuePlacementRule>> ruleClasses; |
| static { |
| Map<String, Class<? extends QueuePlacementRule>> map = |
| new HashMap<String, Class<? extends QueuePlacementRule>>(); |
| map.put("user", QueuePlacementRule.User.class); |
| map.put("primaryGroup", QueuePlacementRule.PrimaryGroup.class); |
| map.put("secondaryGroupExistingQueue", |
| QueuePlacementRule.SecondaryGroupExistingQueue.class); |
| map.put("specified", QueuePlacementRule.Specified.class); |
| map.put("nestedUserQueue", |
| QueuePlacementRule.NestedUserQueue.class); |
| map.put("default", QueuePlacementRule.Default.class); |
| map.put("reject", QueuePlacementRule.Reject.class); |
| ruleClasses = Collections.unmodifiableMap(map); |
| } |
| |
| private final List<QueuePlacementRule> rules; |
| private final Map<FSQueueType, Set<String>> configuredQueues; |
| private final Groups groups; |
| |
| public QueuePlacementPolicy(List<QueuePlacementRule> rules, |
| Map<FSQueueType, Set<String>> configuredQueues, Configuration conf) |
| throws AllocationConfigurationException { |
| for (int i = 0; i < rules.size()-1; i++) { |
| if (rules.get(i).isTerminal()) { |
| throw new AllocationConfigurationException("Rules after rule " |
| + i + " in queue placement policy can never be reached"); |
| } |
| } |
| if (!rules.get(rules.size()-1).isTerminal()) { |
| throw new AllocationConfigurationException( |
| "Could get past last queue placement rule without assigning"); |
| } |
| this.rules = rules; |
| this.configuredQueues = configuredQueues; |
| groups = new Groups(conf); |
| } |
| |
| /** |
| * Builds a QueuePlacementPolicy from an xml element. |
| */ |
| public static QueuePlacementPolicy fromXml(Element el, |
| Map<FSQueueType, Set<String>> configuredQueues, Configuration conf) |
| throws AllocationConfigurationException { |
| List<QueuePlacementRule> rules = new ArrayList<QueuePlacementRule>(); |
| NodeList elements = el.getChildNodes(); |
| for (int i = 0; i < elements.getLength(); i++) { |
| Node node = elements.item(i); |
| if (node instanceof Element) { |
| QueuePlacementRule rule = createAndInitializeRule(node); |
| rules.add(rule); |
| } |
| } |
| return new QueuePlacementPolicy(rules, configuredQueues, conf); |
| } |
| |
| /** |
| * Create and initialize a rule given a xml node |
| * @param node |
| * @return QueuePlacementPolicy |
| * @throws AllocationConfigurationException |
| */ |
| public static QueuePlacementRule createAndInitializeRule(Node node) |
| throws AllocationConfigurationException { |
| Element element = (Element) node; |
| |
| String ruleName = element.getAttribute("name"); |
| if ("".equals(ruleName)) { |
| throw new AllocationConfigurationException("No name provided for a " |
| + "rule element"); |
| } |
| |
| Class<? extends QueuePlacementRule> clazz = ruleClasses.get(ruleName); |
| if (clazz == null) { |
| throw new AllocationConfigurationException("No rule class found for " |
| + ruleName); |
| } |
| QueuePlacementRule rule = ReflectionUtils.newInstance(clazz, null); |
| rule.initializeFromXml(element); |
| return rule; |
| } |
| |
| /** |
| * Build a simple queue placement policy from the allow-undeclared-pools and |
| * user-as-default-queue configuration options. |
| */ |
| public static QueuePlacementPolicy fromConfiguration(Configuration conf, |
| Map<FSQueueType, Set<String>> configuredQueues) { |
| boolean create = conf.getBoolean( |
| FairSchedulerConfiguration.ALLOW_UNDECLARED_POOLS, |
| FairSchedulerConfiguration.DEFAULT_ALLOW_UNDECLARED_POOLS); |
| boolean userAsDefaultQueue = conf.getBoolean( |
| FairSchedulerConfiguration.USER_AS_DEFAULT_QUEUE, |
| FairSchedulerConfiguration.DEFAULT_USER_AS_DEFAULT_QUEUE); |
| List<QueuePlacementRule> rules = new ArrayList<QueuePlacementRule>(); |
| rules.add(new QueuePlacementRule.Specified().initialize(create, null)); |
| if (userAsDefaultQueue) { |
| rules.add(new QueuePlacementRule.User().initialize(create, null)); |
| } |
| if (!userAsDefaultQueue || !create) { |
| rules.add(new QueuePlacementRule.Default().initialize(true, null)); |
| } |
| try { |
| return new QueuePlacementPolicy(rules, configuredQueues, conf); |
| } catch (AllocationConfigurationException ex) { |
| throw new RuntimeException("Should never hit exception when loading" + |
| "placement policy from conf", ex); |
| } |
| } |
| |
| /** |
| * Applies this rule to an app with the given requested queue and user/group |
| * information. |
| * |
| * @param requestedQueue |
| * The queue specified in the ApplicationSubmissionContext |
| * @param user |
| * The user submitting the app |
| * @return |
| * The name of the queue to assign the app to. Or null if the app should |
| * be rejected. |
| * @throws IOException |
| * If an exception is encountered while getting the user's groups |
| */ |
| public String assignAppToQueue(String requestedQueue, String user) |
| throws IOException { |
| for (QueuePlacementRule rule : rules) { |
| String queue = rule.assignAppToQueue(requestedQueue, user, groups, |
| configuredQueues); |
| if (queue == null || !queue.isEmpty()) { |
| return queue; |
| } |
| } |
| throw new IllegalStateException("Should have applied a rule before " + |
| "reaching here"); |
| } |
| |
| public List<QueuePlacementRule> getRules() { |
| return rules; |
| } |
| } |