| /** |
| * 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; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.util.ZKUtil; |
| import org.apache.hadoop.yarn.conf.YarnConfiguration; |
| import org.apache.zookeeper.data.ACL; |
| |
| import java.util.Collections; |
| import java.util.List; |
| |
| /** |
| * Helper class that provides utility methods specific to ZK operations |
| */ |
| @InterfaceAudience.Private |
| public class RMZKUtils { |
| private static final Log LOG = LogFactory.getLog(RMZKUtils.class); |
| |
| /** |
| * Utility method to fetch the ZK ACLs from the configuration |
| */ |
| public static List<ACL> getZKAcls(Configuration conf) throws Exception { |
| // Parse authentication from configuration. |
| String zkAclConf = |
| conf.get(YarnConfiguration.RM_ZK_ACL, |
| YarnConfiguration.DEFAULT_RM_ZK_ACL); |
| try { |
| zkAclConf = ZKUtil.resolveConfIndirection(zkAclConf); |
| return ZKUtil.parseACLs(zkAclConf); |
| } catch (Exception e) { |
| LOG.error("Couldn't read ACLs based on " + YarnConfiguration.RM_ZK_ACL); |
| throw e; |
| } |
| } |
| |
| /** |
| * Utility method to fetch ZK auth info from the configuration |
| */ |
| public static List<ZKUtil.ZKAuthInfo> getZKAuths(Configuration conf) |
| throws Exception { |
| String zkAuthConf = conf.get(YarnConfiguration.RM_ZK_AUTH); |
| try { |
| zkAuthConf = ZKUtil.resolveConfIndirection(zkAuthConf); |
| if (zkAuthConf != null) { |
| return ZKUtil.parseAuth(zkAuthConf); |
| } else { |
| return Collections.emptyList(); |
| } |
| } catch (Exception e) { |
| LOG.error("Couldn't read Auth based on " + YarnConfiguration.RM_ZK_AUTH); |
| throw e; |
| } |
| } |
| } |