/*
* *
* 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.runtime;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
/** An abstraction for various container runtime implementations. Examples
* include Process Tree, Docker, Appc runtimes etc., These implementations
* are meant for low-level OS container support - dependencies on
* higher-level nodemananger constructs should be avoided.
*/
@InterfaceAudience.Private
@InterfaceStability.Unstable
public interface ContainerRuntime {
/** Prepare a container to be ready for launch */
void prepareContainer(ContainerRuntimeContext ctx)
throws ContainerExecutionException;
/** Launch a container. */
void launchContainer(ContainerRuntimeContext ctx)
throws ContainerExecutionException;
/** Signal a container - request to terminate, status check etc., */
void signalContainer(ContainerRuntimeContext ctx)
throws ContainerExecutionException;
/** Any container cleanup that may be required. */
void reapContainer(ContainerRuntimeContext ctx)
throws ContainerExecutionException;
}