001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 019 package org.apache.hadoop.yarn.api.records; 020 021 import org.apache.hadoop.classification.InterfaceAudience.Public; 022 import org.apache.hadoop.classification.InterfaceStability.Stable; 023 import org.apache.hadoop.yarn.api.AMRMProtocol; 024 import org.apache.hadoop.yarn.api.ContainerManager; 025 026 /** 027 * <p><code>ContainerToken</code> is the security token used by the framework 028 * to verify authenticity of any <code>Container</code>.</p> 029 * 030 * <p>The <code>ResourceManager</code>, on container allocation provides a 031 * secure token which is verified by the <code>NodeManager</code> on 032 * container launch.</p> 033 * 034 * <p>Applications do not need to care about <code>ContainerToken</code>, they 035 * are transparently handled by the framework - the allocated 036 * <code>Container</code> includes the <code>ContainerToken</code>.</p> 037 * 038 * @see AMRMProtocol#allocate(org.apache.hadoop.yarn.api.protocolrecords.AllocateRequest) 039 * @see ContainerManager#startContainer(org.apache.hadoop.yarn.api.protocolrecords.StartContainerRequest) 040 */ 041 @Public 042 @Stable 043 public interface ContainerToken extends Token {}