YARN-9475. [YARN-9473] Create basic VE plugin. Contributed by Peter Bacsko.
This commit is contained in:
Zhankun Tang
parent
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/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.hadoop.yarn.server.nodemanager.containermanager.resourceplugin.com.nec;
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import org.apache.hadoop.fs.FileUtil;
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import org.apache.hadoop.util.Shell;
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import org.apache.hadoop.util.Shell.CommandExecutor;
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import org.apache.hadoop.yarn.server.nodemanager.api.deviceplugin.Device;
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import org.apache.hadoop.yarn.server.nodemanager.api.deviceplugin.DevicePlugin;
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import org.apache.hadoop.yarn.server.nodemanager.api.deviceplugin.DevicePluginScheduler;
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import org.apache.hadoop.yarn.server.nodemanager.api.deviceplugin.DeviceRegisterRequest;
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import org.apache.hadoop.yarn.server.nodemanager.api.deviceplugin.DeviceRuntimeSpec;
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import org.apache.hadoop.yarn.server.nodemanager.api.deviceplugin.YarnRuntimeType;
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import org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources.ResourceHandlerException;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import com.google.common.annotations.VisibleForTesting;
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import java.io.File;
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import java.io.IOException;
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import java.util.Arrays;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.Map;
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import java.util.Set;
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import java.util.function.Consumer;
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import java.util.function.Function;
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/**
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* A device framework plugin which supports NEC Vector Engine.
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*
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*/
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public class NECVEPlugin implements DevicePlugin, DevicePluginScheduler {
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private static final String HADOOP_COMMON_HOME = "HADOOP_COMMON_HOME";
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private static final String ENV_SCRIPT_PATH = "NEC_VE_GET_SCRIPT_PATH";
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private static final String ENV_SCRIPT_NAME = "NEC_VE_GET_SCRIPT_NAME";
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private static final String DEFAULT_SCRIPT_NAME = "nec-ve-get.py";
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private static final Logger LOG = LoggerFactory.getLogger(NECVEPlugin.class);
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private static final String[] DEFAULT_BINARY_SEARCH_DIRS = new String[]{
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"/usr/bin", "/bin", "/opt/nec/ve/bin"};
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private String binaryPath;
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private Function<String[], CommandExecutor>
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commandExecutorProvider = this::createCommandExecutor;
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public NECVEPlugin() throws ResourceHandlerException {
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this(System::getenv, DEFAULT_BINARY_SEARCH_DIRS);
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}
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@VisibleForTesting
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NECVEPlugin(Function<String, String> envProvider, String[] scriptPaths)
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throws ResourceHandlerException {
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String binaryName = DEFAULT_SCRIPT_NAME;
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String envScriptName = envProvider.apply(ENV_SCRIPT_NAME);
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if (envScriptName != null) {
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binaryName = envScriptName;
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}
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LOG.info("Use {} as script name.", envScriptName);
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// Try to find the script based on an environment variable, if set
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boolean found = false;
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String envBinaryPath = envProvider.apply(ENV_SCRIPT_PATH);
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if (envBinaryPath != null) {
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this.binaryPath = getScriptFromEnvSetting(envBinaryPath);
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found = binaryPath != null;
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}
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// Try $HADOOP_COMMON_HOME
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if (!found) {
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// print a warning only if the env variable was defined
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if (envBinaryPath != null) {
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LOG.warn("Script {} does not exist, falling back " +
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"to $HADOOP_COMMON_HOME/sbin/DevicePluginScript/", envBinaryPath);
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}
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this.binaryPath = getScriptFromHadoopCommon(envProvider, binaryName);
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found = binaryPath != null;
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}
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// Try the default search directories
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if (!found) {
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LOG.info("Script not found under" +
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" $HADOOP_COMMON_HOME/sbin/DevicePluginScript/," +
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" falling back to default search directories");
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this.binaryPath = getScriptFromSearchDirs(binaryName, scriptPaths);
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found = binaryPath != null;
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}
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// Script not found
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if (!found) {
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LOG.error("Script not found in "
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+ Arrays.toString(scriptPaths));
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throw new ResourceHandlerException(
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"No binary found for " + NECVEPlugin.class.getName());
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}
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}
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public DeviceRegisterRequest getRegisterRequestInfo() {
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return DeviceRegisterRequest.Builder.newInstance()
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.setResourceName("nec.com/ve").build();
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}
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public Set<Device> getDevices() {
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Set<Device> devices = null;
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CommandExecutor executor =
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commandExecutorProvider.apply(new String[]{this.binaryPath});
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try {
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executor.execute();
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String output = executor.getOutput();
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devices = parseOutput(output);
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} catch (IOException e) {
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LOG.warn(e.toString());
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}
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return devices;
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}
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public DeviceRuntimeSpec onDevicesAllocated(Set<Device> set,
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YarnRuntimeType yarnRuntimeType) {
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return null;
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}
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/**
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* Parses the output of the external Python script.
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*
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* Sample line:
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* id=0, dev=/dev/ve0, state=ONLINE, busId=0000:65:00.0, major=243, minor=0
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*/
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private Set<Device> parseOutput(String output) {
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Set<Device> devices = new HashSet<>();
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LOG.info("Parsing output: {}", output);
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String[] lines = output.split("\n");
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for (String line : lines) {
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Device.Builder builder = Device.Builder.newInstance();
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// map key --> builder calls
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Map<String, Consumer<String>> builderInvocations =
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getBuilderInvocationsMap(builder);
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String[] keyValues = line.trim().split(",");
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for (String keyValue : keyValues) {
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String[] tokens = keyValue.trim().split("=");
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if (tokens.length != 2) {
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LOG.error("Unknown format of script output! Skipping this line");
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continue;
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}
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final String key = tokens[0];
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final String value = tokens[1];
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Consumer<String> builderInvocation = builderInvocations.get(key);
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if (builderInvocation != null) {
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builderInvocation.accept(value);
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} else {
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LOG.warn("Unknown key {}, ignored", key);
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}
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}// for key value pairs
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Device device = builder.build();
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if (device.isHealthy()) {
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devices.add(device);
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} else {
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LOG.warn("Skipping device {} because it's not healthy", device);
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}
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}
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return devices;
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}
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@Override
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public void onDevicesReleased(Set<Device> releasedDevices) {
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// nop
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}
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@Override
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public Set<Device> allocateDevices(Set<Device> availableDevices, int count,
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Map<String, String> env) {
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// Can consider topology, utilization.etc
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Set<Device> allocated = new HashSet<>();
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int number = 0;
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for (Device d : availableDevices) {
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allocated.add(d);
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number++;
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if (number == count) {
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break;
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}
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}
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return allocated;
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}
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private CommandExecutor createCommandExecutor(String[] command) {
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return new Shell.ShellCommandExecutor(
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command);
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}
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private String getScriptFromEnvSetting(String envBinaryPath) {
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LOG.info("Checking script path: {}", envBinaryPath);
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File f = new File(envBinaryPath);
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if (!f.exists()) {
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LOG.warn("Script {} does not exist", envBinaryPath);
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return null;
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}
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if (f.isDirectory()) {
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LOG.warn("Specified path {} is a directory", envBinaryPath);
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return null;
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}
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if (!FileUtil.canExecute(f)) {
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LOG.warn("Script {} is not executable", envBinaryPath);
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return null;
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}
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LOG.info("Found script: {}", envBinaryPath);
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return envBinaryPath;
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}
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private String getScriptFromHadoopCommon(
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Function<String, String> envProvider, String binaryName) {
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String scriptPath = null;
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String hadoopCommon = envProvider.apply(HADOOP_COMMON_HOME);
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if (hadoopCommon != null) {
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String targetPath = hadoopCommon +
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"/sbin/DevicePluginScript/" + binaryName;
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LOG.info("Checking script {}: ", targetPath);
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if (new File(targetPath).exists()) {
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LOG.info("Found script: {}", targetPath);
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scriptPath = targetPath;
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}
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} else {
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LOG.info("$HADOOP_COMMON_HOME is not set");
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}
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return scriptPath;
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}
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private String getScriptFromSearchDirs(String binaryName,
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String[] scriptPaths) {
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String scriptPath = null;
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for (String dir : scriptPaths) {
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File f = new File(dir, binaryName);
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if (f.exists()) {
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LOG.info("Found script: {}", dir);
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scriptPath = f.getAbsolutePath();
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break;
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}
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}
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return scriptPath;
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}
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private Map<String, Consumer<String>> getBuilderInvocationsMap(
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Device.Builder builder) {
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Map<String, Consumer<String>> builderInvocations = new HashMap<>();
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builderInvocations.put("id", v -> builder.setId(Integer.parseInt(v)));
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builderInvocations.put("dev", v -> builder.setDevPath(v));
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builderInvocations.put("state", v -> {
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if (v.equals("ONLINE")) {
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builder.setHealthy(true);
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}
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builder.setStatus(v);
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});
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builderInvocations.put("busId", v -> builder.setBusID(v));
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builderInvocations.put("major",
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v -> builder.setMajorNumber(Integer.parseInt(v)));
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builderInvocations.put("minor",
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v -> builder.setMinorNumber(Integer.parseInt(v)));
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return builderInvocations;
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}
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@VisibleForTesting
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void setCommandExecutorProvider(
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Function<String[], CommandExecutor> provider) {
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this.commandExecutorProvider = provider;
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}
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@VisibleForTesting
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String getBinaryPath() {
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return binaryPath;
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}
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}
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@ -0,0 +1,19 @@
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/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.hadoop.yarn.server.nodemanager.containermanager.resourceplugin.com.nec;
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