| /* |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.storm.container; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import org.apache.storm.daemon.supervisor.ExitCodeCallback; |
| |
| /** |
| * A plugin to support resource isolation and limitation within Storm. |
| */ |
| public interface ResourceIsolationInterface { |
| |
| /** |
| * Called when starting up. |
| * |
| * @param conf the cluster config |
| * @throws IOException on any error. |
| */ |
| void prepare(Map<String, Object> conf) throws IOException; |
| |
| /** |
| * This function should be used prior to starting the worker to reserve resources for the worker. |
| * |
| * @param workerId worker id of the worker to start |
| * @param workerMemory the amount of memory for the worker or null if not enforced |
| * @param workerCpu the amount of cpu for the worker or null if not enforced |
| * @param numaId NUMA zone if applicable the worker should be bound to |
| */ |
| void reserveResourcesForWorker(String workerId, Integer workerMemory, Integer workerCpu, String numaId); |
| |
| /** |
| * This function will be called when the worker needs to shutdown. This function should include logic to clean up |
| * after a worker is shutdown. |
| * |
| * @param workerId worker id to shutdown and clean up after |
| */ |
| void releaseResourcesForWorker(String workerId); |
| |
| /** |
| * After reserving resources for the worker (i.e. calling reserveResourcesForWorker), |
| * this function can be used to launch worker process. |
| * @param user the user who runs the command as |
| * @param topologyId the Id of the topology |
| * @param topoConf the topology configuration |
| * @param port the port where the worker is on |
| * @param workerId the Id of the worker |
| * @param command the command to run |
| * @param env the environment to run the command |
| * @param logPrefix the prefix to include in the logs |
| * @param processExitCallback a callback for when the process exits |
| * @param targetDir the working directory to run the command in |
| * @throws IOException on I/O exception |
| */ |
| void launchWorkerProcess(String user, String topologyId, Map<String, Object> topoConf, |
| int port, String workerId, |
| List<String> command, Map<String, String> env, |
| String logPrefix, ExitCodeCallback processExitCallback, File targetDir) throws IOException; |
| |
| /** |
| * Get the current memory usage of the a given worker. |
| * @param user the user that the worker is running as |
| * @param workerId the id of the worker |
| * @param port the port of the worker |
| * @return the amount of memory the worker is using in bytes or -1 if not supported |
| * @throws IOException on I/O exception |
| */ |
| long getMemoryUsage(String user, String workerId, int port) throws IOException; |
| |
| /** |
| * Get the amount of free memory in MB. |
| * This might not be the entire box, it might be within a parent resource group. |
| * @return The amount of memory in MB that are free on the system. |
| * @throws IOException on I/O exception |
| */ |
| long getSystemFreeMemoryMb() throws IOException; |
| |
| /** |
| * Kill the given worker. |
| * @param user the user that the worker is running as |
| * @param workerId the id of the worker to kill |
| * @throws IOException on I/O exception |
| */ |
| void kill(String user, String workerId) throws IOException; |
| |
| /** |
| * Kill the given worker forcefully. |
| * @param user the user that the worker is running as |
| * @param workerId the id of the worker to kill |
| * @throws IOException on I/O exception |
| */ |
| void forceKill(String user, String workerId) throws IOException; |
| |
| /** |
| * Check if all the processes are dead. |
| * @param user the user that the processes are running as |
| * @param workerId the id of the worker to kill |
| * @return true if all the processed are dead; false otherwise |
| * @throws IOException on I/O exception |
| */ |
| boolean areAllProcessesDead(String user, String workerId) throws IOException; |
| |
| /** |
| * Run profiling command. |
| * @param user the user that the worker is running as |
| * @param workerId the id of the worker |
| * @param command the command to run |
| * @param env the environment to run the command |
| * @param logPrefix the prefix to include in the logs |
| * @param targetDir the working directory to run the command in |
| * @return true if succeeds; false otherwise |
| * @throws IOException on I/O exception |
| * @throws InterruptedException if interrupted |
| */ |
| boolean runProfilingCommand(String user, String workerId, List<String> command, Map<String, String> env, |
| String logPrefix, File targetDir) throws IOException, InterruptedException; |
| |
| |
| void cleanup(String user, String workerId, int port) throws IOException; |
| |
| /** |
| * Return true if resources are being managed. |
| * The {@link DefaultResourceIsolationManager} will have it return false since it doesn't really manage resources. |
| * @return true if resources are being managed. |
| */ |
| boolean isResourceManaged(); |
| } |