mirror of https://github.com/apache/cloudstack.git
1228 lines
48 KiB
Java
1228 lines
48 KiB
Java
// 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,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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package com.cloud.agent;
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import java.io.File;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.io.StringWriter;
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import java.net.InetAddress;
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import java.net.InetSocketAddress;
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import java.net.Socket;
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import java.net.UnknownHostException;
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import java.nio.channels.ClosedChannelException;
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import java.nio.charset.Charset;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.Timer;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.LinkedBlockingQueue;
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import java.util.concurrent.SynchronousQueue;
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import java.util.concurrent.ThreadPoolExecutor;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.atomic.AtomicInteger;
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import javax.naming.ConfigurationException;
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import com.cloud.resource.AgentStatusUpdater;
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import com.cloud.resource.ResourceStatusUpdater;
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import com.cloud.agent.api.PingAnswer;
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import com.cloud.utils.NumbersUtil;
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import org.apache.cloudstack.agent.lb.SetupMSListAnswer;
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import org.apache.cloudstack.agent.lb.SetupMSListCommand;
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import org.apache.cloudstack.ca.PostCertificateRenewalCommand;
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import org.apache.cloudstack.ca.SetupCertificateAnswer;
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import org.apache.cloudstack.ca.SetupCertificateCommand;
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import org.apache.cloudstack.ca.SetupKeyStoreCommand;
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import org.apache.cloudstack.ca.SetupKeystoreAnswer;
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import org.apache.cloudstack.managed.context.ManagedContextTimerTask;
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import org.apache.cloudstack.utils.security.KeyStoreUtils;
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import org.apache.commons.collections.CollectionUtils;
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import org.apache.commons.io.FileUtils;
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import org.apache.commons.lang.ObjectUtils;
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import org.apache.commons.lang3.StringUtils;
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import org.apache.logging.log4j.Logger;
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import org.apache.logging.log4j.LogManager;
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import com.cloud.agent.api.AgentControlAnswer;
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import com.cloud.agent.api.AgentControlCommand;
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import com.cloud.agent.api.Answer;
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import com.cloud.agent.api.Command;
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import com.cloud.agent.api.CronCommand;
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import com.cloud.agent.api.MaintainAnswer;
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import com.cloud.agent.api.MaintainCommand;
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import com.cloud.agent.api.PingCommand;
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import com.cloud.agent.api.ReadyCommand;
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import com.cloud.agent.api.ShutdownCommand;
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import com.cloud.agent.api.StartupAnswer;
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import com.cloud.agent.api.StartupCommand;
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import com.cloud.agent.transport.Request;
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import com.cloud.agent.transport.Response;
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import com.cloud.exception.AgentControlChannelException;
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import com.cloud.host.Host;
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import com.cloud.resource.ServerResource;
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import com.cloud.utils.PropertiesUtil;
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import com.cloud.utils.backoff.BackoffAlgorithm;
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import com.cloud.utils.concurrency.NamedThreadFactory;
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import com.cloud.utils.exception.CloudRuntimeException;
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import com.cloud.utils.exception.NioConnectionException;
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import com.cloud.utils.exception.TaskExecutionException;
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import com.cloud.utils.nio.HandlerFactory;
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import com.cloud.utils.nio.Link;
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import com.cloud.utils.nio.NioClient;
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import com.cloud.utils.nio.NioConnection;
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import com.cloud.utils.nio.Task;
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import com.cloud.utils.script.OutputInterpreter;
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import com.cloud.utils.script.Script;
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import org.apache.logging.log4j.ThreadContext;
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/**
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* @config
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* {@table
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* || Param Name | Description | Values | Default ||
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* || type | Type of server | Storage / Computing / Routing | No Default ||
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* || workers | # of workers to process the requests | int | 1 ||
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* || host | host to connect to | ip address | localhost ||
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* || port | port to connect to | port number | 8250 ||
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* || instance | Used to allow multiple agents running on the same host | String | none || * }
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*
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* For more configuration options, see the individual types.
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*
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**/
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public class Agent implements HandlerFactory, IAgentControl, AgentStatusUpdater {
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protected Logger logger = LogManager.getLogger(getClass());
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public enum ExitStatus {
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Normal(0), // Normal status = 0.
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Upgrade(65), // Exiting for upgrade.
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Configuration(66), // Exiting due to configuration problems.
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Error(67); // Exiting because of error.
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int value;
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ExitStatus(final int value) {
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this.value = value;
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}
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public int value() {
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return value;
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}
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}
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List<IAgentControlListener> _controlListeners = new ArrayList<IAgentControlListener>();
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IAgentShell _shell;
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NioConnection _connection;
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ServerResource _resource;
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Link _link;
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Long _id;
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Timer _timer = new Timer("Agent Timer");
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Timer certTimer;
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Timer hostLBTimer;
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List<WatchTask> _watchList = new ArrayList<WatchTask>();
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long _sequence = 0;
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long _lastPingResponseTime = 0;
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long _pingInterval = 0;
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AtomicInteger _inProgress = new AtomicInteger();
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StartupTask _startup = null;
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long _startupWaitDefault = 180000;
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long _startupWait = _startupWaitDefault;
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boolean _reconnectAllowed = true;
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//For time sentitive task, e.g. PingTask
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ThreadPoolExecutor _ugentTaskPool;
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ExecutorService _executor;
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Thread _shutdownThread = new ShutdownThread(this);
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private String _keystoreSetupPath;
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private String _keystoreCertImportPath;
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// for simulator use only
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public Agent(final IAgentShell shell) {
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_shell = shell;
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_link = null;
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_connection = new NioClient("Agent", _shell.getNextHost(), _shell.getPort(), _shell.getWorkers(), this);
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Runtime.getRuntime().addShutdownHook(_shutdownThread);
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_ugentTaskPool =
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new ThreadPoolExecutor(shell.getPingRetries(), 2 * shell.getPingRetries(), 10, TimeUnit.MINUTES, new SynchronousQueue<Runnable>(), new NamedThreadFactory(
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"UgentTask"));
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_executor =
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new ThreadPoolExecutor(_shell.getWorkers(), 5 * _shell.getWorkers(), 1, TimeUnit.DAYS, new LinkedBlockingQueue<Runnable>(), new NamedThreadFactory(
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"agentRequest-Handler"));
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}
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public Agent(final IAgentShell shell, final int localAgentId, final ServerResource resource) throws ConfigurationException {
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_shell = shell;
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_resource = resource;
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_link = null;
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resource.setAgentControl(this);
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final String value = _shell.getPersistentProperty(getResourceName(), "id");
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_id = value != null ? Long.parseLong(value) : null;
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logger.info("id is {}", ObjectUtils.defaultIfNull(_id, ""));
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final Map<String, Object> params = new HashMap<>();
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// merge with properties from command line to let resource access command line parameters
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for (final Map.Entry<String, Object> cmdLineProp : _shell.getCmdLineProperties().entrySet()) {
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params.put(cmdLineProp.getKey(), cmdLineProp.getValue());
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}
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if (!_resource.configure(getResourceName(), params)) {
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throw new ConfigurationException("Unable to configure " + _resource.getName());
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}
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final String host = _shell.getNextHost();
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_connection = new NioClient("Agent", host, _shell.getPort(), _shell.getWorkers(), this);
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// ((NioClient)_connection).setBindAddress(_shell.getPrivateIp());
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logger.debug("Adding shutdown hook");
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Runtime.getRuntime().addShutdownHook(_shutdownThread);
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_ugentTaskPool =
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new ThreadPoolExecutor(shell.getPingRetries(), 2 * shell.getPingRetries(), 10, TimeUnit.MINUTES, new SynchronousQueue<Runnable>(), new NamedThreadFactory(
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"UgentTask"));
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_executor =
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new ThreadPoolExecutor(_shell.getWorkers(), 5 * _shell.getWorkers(), 1, TimeUnit.DAYS, new LinkedBlockingQueue<Runnable>(), new NamedThreadFactory(
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"agentRequest-Handler"));
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logger.info("Agent [id = {} : type = {} : zone = {} : pod = {} : workers = {} : host = {} : port = {}", ObjectUtils.defaultIfNull(_id, "new"), getResourceName(),
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_shell.getZone(), _shell.getPod(), _shell.getWorkers(), host, _shell.getPort());
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}
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public String getVersion() {
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return _shell.getVersion();
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}
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public String getResourceGuid() {
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final String guid = _shell.getGuid();
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return guid + "-" + getResourceName();
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}
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public String getZone() {
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return _shell.getZone();
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}
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public String getPod() {
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return _shell.getPod();
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}
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protected void setLink(final Link link) {
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_link = link;
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}
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public ServerResource getResource() {
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return _resource;
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}
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public BackoffAlgorithm getBackoffAlgorithm() {
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return _shell.getBackoffAlgorithm();
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}
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public String getResourceName() {
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return _resource.getClass().getSimpleName();
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}
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/**
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* In case of a software based agent restart, this method
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* can help to perform explicit garbage collection of any old
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* agent instances and its inner objects.
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*/
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private void scavengeOldAgentObjects() {
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_executor.submit(new Runnable() {
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@Override
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public void run() {
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try {
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Thread.sleep(2000L);
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} catch (final InterruptedException ignored) {
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} finally {
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System.gc();
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}
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}
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});
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}
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public void start() {
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if (!_resource.start()) {
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logger.error("Unable to start the resource: {}", _resource.getName());
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throw new CloudRuntimeException("Unable to start the resource: " + _resource.getName());
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}
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_keystoreSetupPath = Script.findScript("scripts/util/", KeyStoreUtils.KS_SETUP_SCRIPT);
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if (_keystoreSetupPath == null) {
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throw new CloudRuntimeException(String.format("Unable to find the '%s' script", KeyStoreUtils.KS_SETUP_SCRIPT));
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}
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_keystoreCertImportPath = Script.findScript("scripts/util/", KeyStoreUtils.KS_IMPORT_SCRIPT);
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if (_keystoreCertImportPath == null) {
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throw new CloudRuntimeException(String.format("Unable to find the '%s' script", KeyStoreUtils.KS_IMPORT_SCRIPT));
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}
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try {
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_connection.start();
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} catch (final NioConnectionException e) {
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logger.warn("Attempt to connect to server generated NIO Connection Exception {}, trying again", e.getLocalizedMessage());
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}
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while (!_connection.isStartup()) {
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final String host = _shell.getNextHost();
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_shell.getBackoffAlgorithm().waitBeforeRetry();
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_connection = new NioClient("Agent", host, _shell.getPort(), _shell.getWorkers(), this);
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logger.info("Connecting to host:{}", host);
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try {
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_connection.start();
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} catch (final NioConnectionException e) {
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_connection.stop();
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try {
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_connection.cleanUp();
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} catch (final IOException ex) {
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logger.warn("Fail to clean up old connection. {}", ex);
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}
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logger.info("Attempted to connect to the server, but received an unexpected exception, trying again...", e);
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}
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}
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_shell.updateConnectedHost();
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scavengeOldAgentObjects();
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}
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public void stop(final String reason, final String detail) {
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logger.info("Stopping the agent: Reason = {} {}", reason, ": Detail = " + ObjectUtils.defaultIfNull(detail, ""));
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_reconnectAllowed = false;
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if (_connection != null) {
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final ShutdownCommand cmd = new ShutdownCommand(reason, detail);
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try {
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if (_link != null) {
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final Request req = new Request(_id != null ? _id : -1, -1, cmd, false);
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_link.send(req.toBytes());
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}
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} catch (final ClosedChannelException e) {
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logger.warn("Unable to send: {}", cmd.toString());
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} catch (final Exception e) {
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logger.warn("Unable to send: {} due to exception: {}", cmd.toString(), e);
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}
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logger.debug("Sending shutdown to management server");
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try {
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Thread.sleep(1000);
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} catch (final InterruptedException e) {
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logger.debug("Who the heck interrupted me here?");
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}
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_connection.stop();
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_connection = null;
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_link = null;
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}
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if (_resource != null) {
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_resource.stop();
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_resource = null;
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}
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if (_startup != null) {
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_startup = null;
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}
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if (_ugentTaskPool != null) {
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_ugentTaskPool.shutdownNow();
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_ugentTaskPool = null;
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}
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if (_executor != null) {
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_executor.shutdown();
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_executor = null;
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}
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if (_timer != null) {
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_timer.cancel();
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_timer = null;
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}
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if (hostLBTimer != null) {
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hostLBTimer.cancel();
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hostLBTimer = null;
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}
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if (certTimer != null) {
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certTimer.cancel();
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certTimer = null;
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}
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}
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public Long getId() {
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return _id;
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}
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public void setId(final Long id) {
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logger.debug("Set agent id {}", id);
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_id = id;
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_shell.setPersistentProperty(getResourceName(), "id", Long.toString(id));
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}
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private synchronized void scheduleServicesRestartTask() {
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if (certTimer != null) {
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certTimer.cancel();
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certTimer.purge();
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}
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certTimer = new Timer("Certificate Renewal Timer");
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certTimer.schedule(new PostCertificateRenewalTask(this), 5000L);
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}
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private synchronized void scheduleHostLBCheckerTask(final long checkInterval) {
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if (hostLBTimer != null) {
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hostLBTimer.cancel();
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}
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if (checkInterval > 0L) {
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logger.info("Scheduling preferred host timer task with host.lb.interval={}ms", checkInterval);
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hostLBTimer = new Timer("Host LB Timer");
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hostLBTimer.scheduleAtFixedRate(new PreferredHostCheckerTask(), checkInterval, checkInterval);
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}
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}
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public void scheduleWatch(final Link link, final Request request, final long delay, final long period) {
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synchronized (_watchList) {
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logger.debug("Adding task with request: {} to watch list", request.toString());
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final WatchTask task = new WatchTask(link, request, this);
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_timer.schedule(task, 0, period);
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_watchList.add(task);
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}
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}
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public void triggerUpdate() {
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PingCommand command = _resource.getCurrentStatus(getId());
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command.setOutOfBand(true);
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logger.debug("Sending out of band ping");
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final Request request = new Request(_id, -1, command, false);
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request.setSequence(getNextSequence());
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try {
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_link.send(request.toBytes());
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} catch (final ClosedChannelException e) {
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logger.warn("Unable to send ping update: {}", request.toString());
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}
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}
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protected void cancelTasks() {
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synchronized (_watchList) {
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for (final WatchTask task : _watchList) {
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task.cancel();
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}
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logger.debug("Clearing {} tasks of watch list", _watchList.size());
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_watchList.clear();
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}
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}
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/**
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* Cleanup agent zone properties.
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*
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* Unset zone, cluster and pod values so that host is not added back
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* when service is restarted. This will be set to proper values
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* when host is added back
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*/
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protected void cleanupAgentZoneProperties() {
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_shell.setPersistentProperty(null, "zone", "");
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_shell.setPersistentProperty(null, "cluster", "");
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_shell.setPersistentProperty(null, "pod", "");
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}
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public synchronized void lockStartupTask(final Link link) {
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_startup = new StartupTask(link);
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_timer.schedule(_startup, _startupWait);
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}
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public void sendStartup(final Link link) {
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final StartupCommand[] startup = _resource.initialize();
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if (startup != null) {
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final String msHostList = _shell.getPersistentProperty(null, "host");
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final Command[] commands = new Command[startup.length];
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for (int i = 0; i < startup.length; i++) {
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setupStartupCommand(startup[i]);
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startup[i].setMSHostList(msHostList);
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commands[i] = startup[i];
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}
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final Request request = new Request(_id != null ? _id : -1, -1, commands, false, false);
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request.setSequence(getNextSequence());
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logger.debug("Sending Startup: {}", request.toString());
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lockStartupTask(link);
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try {
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link.send(request.toBytes());
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} catch (final ClosedChannelException e) {
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logger.warn("Unable to send request: {}", request.toString());
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}
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if (_resource instanceof ResourceStatusUpdater) {
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((ResourceStatusUpdater) _resource).registerStatusUpdater(this);
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}
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}
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}
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protected void setupStartupCommand(final StartupCommand startup) {
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InetAddress addr;
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try {
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addr = InetAddress.getLocalHost();
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} catch (final UnknownHostException e) {
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logger.warn("unknown host? ", e);
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throw new CloudRuntimeException("Cannot get local IP address");
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}
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final Script command = new Script("hostname", 500, logger);
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final OutputInterpreter.OneLineParser parser = new OutputInterpreter.OneLineParser();
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final String result = command.execute(parser);
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final String hostname = result == null ? parser.getLine() : addr.toString();
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startup.setId(getId());
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if (startup.getName() == null) {
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startup.setName(hostname);
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}
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startup.setDataCenter(getZone());
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startup.setPod(getPod());
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startup.setGuid(getResourceGuid());
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startup.setResourceName(getResourceName());
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startup.setVersion(getVersion());
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}
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@Override
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public Task create(final Task.Type type, final Link link, final byte[] data) {
|
|
return new ServerHandler(type, link, data);
|
|
}
|
|
|
|
protected void reconnect(final Link link) {
|
|
if (!_reconnectAllowed) {
|
|
return;
|
|
}
|
|
synchronized (this) {
|
|
if (_startup != null) {
|
|
_startup.cancel();
|
|
_startup = null;
|
|
}
|
|
}
|
|
|
|
if (link != null) {
|
|
link.close();
|
|
link.terminated();
|
|
}
|
|
|
|
setLink(null);
|
|
cancelTasks();
|
|
|
|
_resource.disconnected();
|
|
|
|
logger.info("Lost connection to host: {}. Attempting reconnection while we still have {} commands in progress.", _shell.getConnectedHost(), _inProgress.get());
|
|
|
|
_connection.stop();
|
|
|
|
try {
|
|
_connection.cleanUp();
|
|
} catch (final IOException e) {
|
|
logger.warn("Fail to clean up old connection. {}", e);
|
|
}
|
|
|
|
while (_connection.isStartup()) {
|
|
_shell.getBackoffAlgorithm().waitBeforeRetry();
|
|
}
|
|
|
|
do {
|
|
final String host = _shell.getNextHost();
|
|
_connection = new NioClient("Agent", host, _shell.getPort(), _shell.getWorkers(), this);
|
|
logger.info("Reconnecting to host:{}", host);
|
|
try {
|
|
_connection.start();
|
|
} catch (final NioConnectionException e) {
|
|
logger.info("Attempted to re-connect to the server, but received an unexpected exception, trying again...", e);
|
|
_connection.stop();
|
|
try {
|
|
_connection.cleanUp();
|
|
} catch (final IOException ex) {
|
|
logger.warn("Fail to clean up old connection. {}", ex);
|
|
}
|
|
}
|
|
_shell.getBackoffAlgorithm().waitBeforeRetry();
|
|
} while (!_connection.isStartup());
|
|
_shell.updateConnectedHost();
|
|
logger.info("Connected to the host: {}", _shell.getConnectedHost());
|
|
}
|
|
|
|
public void processStartupAnswer(final Answer answer, final Response response, final Link link) {
|
|
boolean cancelled = false;
|
|
synchronized (this) {
|
|
if (_startup != null) {
|
|
_startup.cancel();
|
|
_startup = null;
|
|
} else {
|
|
cancelled = true;
|
|
}
|
|
}
|
|
final StartupAnswer startup = (StartupAnswer)answer;
|
|
if (!startup.getResult()) {
|
|
logger.error("Not allowed to connect to the server: {}", answer.getDetails());
|
|
System.exit(1);
|
|
}
|
|
if (cancelled) {
|
|
logger.warn("Threw away a startup answer because we're reconnecting.");
|
|
return;
|
|
}
|
|
|
|
logger.info("Process agent startup answer, agent id = {}", startup.getHostId());
|
|
|
|
setId(startup.getHostId());
|
|
_pingInterval = (long)startup.getPingInterval() * 1000; // change to ms.
|
|
|
|
setLastPingResponseTime();
|
|
scheduleWatch(link, response, _pingInterval, _pingInterval);
|
|
|
|
_ugentTaskPool.setKeepAliveTime(2 * _pingInterval, TimeUnit.MILLISECONDS);
|
|
|
|
logger.info("Startup Response Received: agent id = {}", getId());
|
|
}
|
|
|
|
protected void processRequest(final Request request, final Link link) {
|
|
boolean requestLogged = false;
|
|
Response response = null;
|
|
try {
|
|
final Command[] cmds = request.getCommands();
|
|
final Answer[] answers = new Answer[cmds.length];
|
|
|
|
for (int i = 0; i < cmds.length; i++) {
|
|
final Command cmd = cmds[i];
|
|
Answer answer;
|
|
try {
|
|
if (cmd.getContextParam("logid") != null) {
|
|
ThreadContext.put("logcontextid", cmd.getContextParam("logid"));
|
|
}
|
|
if (logger.isDebugEnabled()) {
|
|
if (!requestLogged) // ensures request is logged only once per method call
|
|
{
|
|
final String requestMsg = request.toString();
|
|
if (requestMsg != null) {
|
|
logger.debug("Request:{}",requestMsg);
|
|
}
|
|
requestLogged = true;
|
|
}
|
|
logger.debug("Processing command: {}", cmd.toString());
|
|
}
|
|
|
|
if (cmd instanceof CronCommand) {
|
|
final CronCommand watch = (CronCommand)cmd;
|
|
scheduleWatch(link, request, (long)watch.getInterval() * 1000, watch.getInterval() * 1000);
|
|
answer = new Answer(cmd, true, null);
|
|
} else if (cmd instanceof ShutdownCommand) {
|
|
final ShutdownCommand shutdown = (ShutdownCommand)cmd;
|
|
logger.debug("Received shutdownCommand, due to: {}", shutdown.getReason());
|
|
cancelTasks();
|
|
if (shutdown.isRemoveHost()) {
|
|
cleanupAgentZoneProperties();
|
|
}
|
|
_reconnectAllowed = false;
|
|
answer = new Answer(cmd, true, null);
|
|
} else if (cmd instanceof ReadyCommand && ((ReadyCommand)cmd).getDetails() != null) {
|
|
logger.debug("Not ready to connect to mgt server: {}", ((ReadyCommand)cmd).getDetails());
|
|
System.exit(1);
|
|
return;
|
|
} else if (cmd instanceof MaintainCommand) {
|
|
logger.debug("Received maintainCommand, do not cancel current tasks");
|
|
answer = new MaintainAnswer((MaintainCommand)cmd);
|
|
} else if (cmd instanceof AgentControlCommand) {
|
|
answer = null;
|
|
synchronized (_controlListeners) {
|
|
for (final IAgentControlListener listener : _controlListeners) {
|
|
answer = listener.processControlRequest(request, (AgentControlCommand)cmd);
|
|
if (answer != null) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (answer == null) {
|
|
logger.warn("No handler found to process cmd: {}", cmd.toString());
|
|
answer = new AgentControlAnswer(cmd);
|
|
}
|
|
} else if (cmd instanceof SetupKeyStoreCommand && ((SetupKeyStoreCommand) cmd).isHandleByAgent()) {
|
|
answer = setupAgentKeystore((SetupKeyStoreCommand) cmd);
|
|
} else if (cmd instanceof SetupCertificateCommand && ((SetupCertificateCommand) cmd).isHandleByAgent()) {
|
|
answer = setupAgentCertificate((SetupCertificateCommand) cmd);
|
|
if (Host.Type.Routing.equals(_resource.getType())) {
|
|
scheduleServicesRestartTask();
|
|
}
|
|
} else if (cmd instanceof SetupMSListCommand) {
|
|
answer = setupManagementServerList((SetupMSListCommand) cmd);
|
|
} else {
|
|
if (cmd instanceof ReadyCommand) {
|
|
processReadyCommand(cmd);
|
|
}
|
|
_inProgress.incrementAndGet();
|
|
try {
|
|
answer = _resource.executeRequest(cmd);
|
|
} finally {
|
|
_inProgress.decrementAndGet();
|
|
}
|
|
if (answer == null) {
|
|
logger.debug("Response: unsupported command {}", cmd.toString());
|
|
answer = Answer.createUnsupportedCommandAnswer(cmd);
|
|
}
|
|
}
|
|
} catch (final Throwable th) {
|
|
logger.warn("Caught: ", th);
|
|
final StringWriter writer = new StringWriter();
|
|
th.printStackTrace(new PrintWriter(writer));
|
|
answer = new Answer(cmd, false, writer.toString());
|
|
}
|
|
|
|
answers[i] = answer;
|
|
if (!answer.getResult() && request.stopOnError()) {
|
|
for (i++; i < cmds.length; i++) {
|
|
answers[i] = new Answer(cmds[i], false, "Stopped by previous failure");
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
response = new Response(request, answers);
|
|
} finally {
|
|
if (logger.isDebugEnabled()) {
|
|
final String responseMsg = response.toString();
|
|
if (responseMsg != null) {
|
|
logger.debug(response.toString());
|
|
}
|
|
}
|
|
|
|
if (response != null) {
|
|
try {
|
|
link.send(response.toBytes());
|
|
} catch (final ClosedChannelException e) {
|
|
logger.warn("Unable to send response: {}", response.toString());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
public Answer setupAgentKeystore(final SetupKeyStoreCommand cmd) {
|
|
final String keyStorePassword = cmd.getKeystorePassword();
|
|
final long validityDays = cmd.getValidityDays();
|
|
|
|
logger.debug("Setting up agent keystore file and generating CSR");
|
|
|
|
final File agentFile = PropertiesUtil.findConfigFile("agent.properties");
|
|
if (agentFile == null) {
|
|
return new Answer(cmd, false, "Failed to find agent.properties file");
|
|
}
|
|
final String keyStoreFile = agentFile.getParent() + "/" + KeyStoreUtils.KS_FILENAME;
|
|
final String csrFile = agentFile.getParent() + "/" + KeyStoreUtils.CSR_FILENAME;
|
|
|
|
String storedPassword = _shell.getPersistentProperty(null, KeyStoreUtils.KS_PASSPHRASE_PROPERTY);
|
|
if (StringUtils.isEmpty(storedPassword)) {
|
|
storedPassword = keyStorePassword;
|
|
_shell.setPersistentProperty(null, KeyStoreUtils.KS_PASSPHRASE_PROPERTY, storedPassword);
|
|
}
|
|
|
|
Script script = new Script(_keystoreSetupPath, 300000, logger);
|
|
script.add(agentFile.getAbsolutePath());
|
|
script.add(keyStoreFile);
|
|
script.add(storedPassword);
|
|
script.add(String.valueOf(validityDays));
|
|
script.add(csrFile);
|
|
String result = script.execute();
|
|
if (result != null) {
|
|
throw new CloudRuntimeException("Unable to setup keystore file");
|
|
}
|
|
|
|
final String csrString;
|
|
try {
|
|
csrString = FileUtils.readFileToString(new File(csrFile), Charset.defaultCharset());
|
|
} catch (IOException e) {
|
|
throw new CloudRuntimeException("Unable to read generated CSR file", e);
|
|
}
|
|
return new SetupKeystoreAnswer(csrString);
|
|
}
|
|
|
|
private Answer setupAgentCertificate(final SetupCertificateCommand cmd) {
|
|
final String certificate = cmd.getCertificate();
|
|
final String privateKey = cmd.getPrivateKey();
|
|
final String caCertificates = cmd.getCaCertificates();
|
|
|
|
logger.debug("Importing received certificate to agent's keystore");
|
|
|
|
final File agentFile = PropertiesUtil.findConfigFile("agent.properties");
|
|
if (agentFile == null) {
|
|
return new Answer(cmd, false, "Failed to find agent.properties file");
|
|
}
|
|
final String keyStoreFile = agentFile.getParent() + "/" + KeyStoreUtils.KS_FILENAME;
|
|
final String certFile = agentFile.getParent() + "/" + KeyStoreUtils.CERT_FILENAME;
|
|
final String privateKeyFile = agentFile.getParent() + "/" + KeyStoreUtils.PKEY_FILENAME;
|
|
final String caCertFile = agentFile.getParent() + "/" + KeyStoreUtils.CACERT_FILENAME;
|
|
|
|
try {
|
|
FileUtils.writeStringToFile(new File(certFile), certificate, Charset.defaultCharset());
|
|
FileUtils.writeStringToFile(new File(caCertFile), caCertificates, Charset.defaultCharset());
|
|
logger.debug("Saved received client certificate to: {}", certFile);
|
|
} catch (IOException e) {
|
|
throw new CloudRuntimeException("Unable to save received agent client and ca certificates", e);
|
|
}
|
|
|
|
String ksPassphrase = _shell.getPersistentProperty(null, KeyStoreUtils.KS_PASSPHRASE_PROPERTY);
|
|
Script script = new Script(_keystoreCertImportPath, 300000, logger);
|
|
script.add(agentFile.getAbsolutePath());
|
|
script.add(ksPassphrase);
|
|
script.add(keyStoreFile);
|
|
script.add(KeyStoreUtils.AGENT_MODE);
|
|
script.add(certFile);
|
|
script.add("");
|
|
script.add(caCertFile);
|
|
script.add("");
|
|
script.add(privateKeyFile);
|
|
script.add(privateKey);
|
|
String result = script.execute();
|
|
if (result != null) {
|
|
throw new CloudRuntimeException("Unable to import certificate into keystore file");
|
|
}
|
|
return new SetupCertificateAnswer(true);
|
|
}
|
|
|
|
private void processManagementServerList(final List<String> msList, final String lbAlgorithm, final Long lbCheckInterval) {
|
|
if (CollectionUtils.isNotEmpty(msList) && StringUtils.isNotEmpty(lbAlgorithm)) {
|
|
try {
|
|
final String newMSHosts = String.format("%s%s%s", com.cloud.utils.StringUtils.toCSVList(msList), IAgentShell.hostLbAlgorithmSeparator, lbAlgorithm);
|
|
_shell.setPersistentProperty(null, "host", newMSHosts);
|
|
_shell.setHosts(newMSHosts);
|
|
_shell.resetHostCounter();
|
|
logger.info("Processed new management server list: {}", newMSHosts);
|
|
} catch (final Exception e) {
|
|
throw new CloudRuntimeException("Could not persist received management servers list", e);
|
|
}
|
|
}
|
|
if ("shuffle".equals(lbAlgorithm)) {
|
|
scheduleHostLBCheckerTask(0);
|
|
} else {
|
|
scheduleHostLBCheckerTask(_shell.getLbCheckerInterval(lbCheckInterval));
|
|
}
|
|
}
|
|
|
|
private Answer setupManagementServerList(final SetupMSListCommand cmd) {
|
|
processManagementServerList(cmd.getMsList(), cmd.getLbAlgorithm(), cmd.getLbCheckInterval());
|
|
return new SetupMSListAnswer(true);
|
|
}
|
|
|
|
public void processResponse(final Response response, final Link link) {
|
|
final Answer answer = response.getAnswer();
|
|
logger.debug("Received response: {}", response.toString());
|
|
if (answer instanceof StartupAnswer) {
|
|
processStartupAnswer(answer, response, link);
|
|
} else if (answer instanceof AgentControlAnswer) {
|
|
// Notice, we are doing callback while holding a lock!
|
|
synchronized (_controlListeners) {
|
|
for (final IAgentControlListener listener : _controlListeners) {
|
|
listener.processControlResponse(response, (AgentControlAnswer)answer);
|
|
}
|
|
}
|
|
} else if (answer instanceof PingAnswer && (((PingAnswer) answer).isSendStartup()) && _reconnectAllowed) {
|
|
logger.info("Management server requested startup command to reinitialize the agent");
|
|
sendStartup(link);
|
|
} else {
|
|
setLastPingResponseTime();
|
|
}
|
|
}
|
|
|
|
public void processReadyCommand(final Command cmd) {
|
|
final ReadyCommand ready = (ReadyCommand)cmd;
|
|
// Set human readable sizes;
|
|
Boolean humanReadable = ready.getEnableHumanReadableSizes();
|
|
if (humanReadable != null){
|
|
NumbersUtil.enableHumanReadableSizes = humanReadable;
|
|
}
|
|
|
|
logger.info("Processing agent ready command, agent id = {}", ready.getHostId());
|
|
if (ready.getHostId() != null) {
|
|
setId(ready.getHostId());
|
|
}
|
|
|
|
processManagementServerList(ready.getMsHostList(), ready.getLbAlgorithm(), ready.getLbCheckInterval());
|
|
|
|
logger.info("Ready command is processed for agent id = {}", getId());
|
|
}
|
|
|
|
public void processOtherTask(final Task task) {
|
|
final Object obj = task.get();
|
|
if (obj instanceof Response) {
|
|
if (System.currentTimeMillis() - _lastPingResponseTime > _pingInterval * _shell.getPingRetries()) {
|
|
logger.error("Ping Interval has gone past {}. Won't reconnect to mgt server, as connection is still alive", _pingInterval * _shell.getPingRetries());
|
|
return;
|
|
}
|
|
|
|
final PingCommand ping = _resource.getCurrentStatus(getId());
|
|
final Request request = new Request(_id, -1, ping, false);
|
|
request.setSequence(getNextSequence());
|
|
logger.debug("Sending ping: {}", request.toString());
|
|
|
|
try {
|
|
task.getLink().send(request.toBytes());
|
|
//if i can send pingcommand out, means the link is ok
|
|
setLastPingResponseTime();
|
|
} catch (final ClosedChannelException e) {
|
|
logger.warn("Unable to send request: {}", request.toString());
|
|
}
|
|
|
|
} else if (obj instanceof Request) {
|
|
final Request req = (Request)obj;
|
|
final Command command = req.getCommand();
|
|
if (command.getContextParam("logid") != null) {
|
|
ThreadContext.put("logcontextid", command.getContextParam("logid"));
|
|
}
|
|
Answer answer = null;
|
|
_inProgress.incrementAndGet();
|
|
try {
|
|
answer = _resource.executeRequest(command);
|
|
} finally {
|
|
_inProgress.decrementAndGet();
|
|
}
|
|
if (answer != null) {
|
|
final Response response = new Response(req, answer);
|
|
|
|
logger.debug("Watch Sent: {}", response.toString());
|
|
try {
|
|
task.getLink().send(response.toBytes());
|
|
} catch (final ClosedChannelException e) {
|
|
logger.warn("Unable to send response: {}", response.toString());
|
|
}
|
|
}
|
|
} else {
|
|
logger.warn("Ignoring an unknown task");
|
|
}
|
|
}
|
|
|
|
public synchronized void setLastPingResponseTime() {
|
|
_lastPingResponseTime = System.currentTimeMillis();
|
|
}
|
|
|
|
protected synchronized long getNextSequence() {
|
|
return _sequence++;
|
|
}
|
|
|
|
@Override
|
|
public void registerControlListener(final IAgentControlListener listener) {
|
|
synchronized (_controlListeners) {
|
|
_controlListeners.add(listener);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void unregisterControlListener(final IAgentControlListener listener) {
|
|
synchronized (_controlListeners) {
|
|
_controlListeners.remove(listener);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public AgentControlAnswer sendRequest(final AgentControlCommand cmd, final int timeoutInMilliseconds) throws AgentControlChannelException {
|
|
final Request request = new Request(getId(), -1, new Command[] {cmd}, true, false);
|
|
request.setSequence(getNextSequence());
|
|
|
|
final AgentControlListener listener = new AgentControlListener(request);
|
|
|
|
registerControlListener(listener);
|
|
try {
|
|
postRequest(request);
|
|
synchronized (listener) {
|
|
try {
|
|
listener.wait(timeoutInMilliseconds);
|
|
} catch (final InterruptedException e) {
|
|
logger.warn("sendRequest is interrupted, exit waiting");
|
|
}
|
|
}
|
|
|
|
return listener.getAnswer();
|
|
} finally {
|
|
unregisterControlListener(listener);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void postRequest(final AgentControlCommand cmd) throws AgentControlChannelException {
|
|
final Request request = new Request(getId(), -1, new Command[] {cmd}, true, false);
|
|
request.setSequence(getNextSequence());
|
|
postRequest(request);
|
|
}
|
|
|
|
private void postRequest(final Request request) throws AgentControlChannelException {
|
|
if (_link != null) {
|
|
try {
|
|
_link.send(request.toBytes());
|
|
} catch (final ClosedChannelException e) {
|
|
logger.warn("Unable to post agent control request: {}", request.toString());
|
|
throw new AgentControlChannelException("Unable to post agent control request due to " + e.getMessage());
|
|
}
|
|
} else {
|
|
throw new AgentControlChannelException("Unable to post agent control request as link is not available");
|
|
}
|
|
}
|
|
|
|
public class AgentControlListener implements IAgentControlListener {
|
|
private AgentControlAnswer _answer;
|
|
private final Request _request;
|
|
|
|
public AgentControlListener(final Request request) {
|
|
_request = request;
|
|
}
|
|
|
|
public AgentControlAnswer getAnswer() {
|
|
return _answer;
|
|
}
|
|
|
|
@Override
|
|
public Answer processControlRequest(final Request request, final AgentControlCommand cmd) {
|
|
return null;
|
|
}
|
|
|
|
@Override
|
|
public void processControlResponse(final Response response, final AgentControlAnswer answer) {
|
|
if (_request.getSequence() == response.getSequence()) {
|
|
_answer = answer;
|
|
synchronized (this) {
|
|
notifyAll();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
protected class ShutdownThread extends Thread {
|
|
Agent _agent;
|
|
|
|
public ShutdownThread(final Agent agent) {
|
|
super("AgentShutdownThread");
|
|
_agent = agent;
|
|
}
|
|
|
|
@Override
|
|
public void run() {
|
|
_agent.stop(ShutdownCommand.Requested, null);
|
|
}
|
|
}
|
|
|
|
public class WatchTask extends ManagedContextTimerTask {
|
|
protected Request _request;
|
|
protected Agent _agent;
|
|
protected Link _link;
|
|
|
|
public WatchTask(final Link link, final Request request, final Agent agent) {
|
|
super();
|
|
_request = request;
|
|
_link = link;
|
|
_agent = agent;
|
|
}
|
|
|
|
@Override
|
|
protected void runInContext() {
|
|
logger.trace("Scheduling {}", (_request instanceof Response ? "Ping" : "Watch Task"));
|
|
try {
|
|
if (_request instanceof Response) {
|
|
_ugentTaskPool.submit(new ServerHandler(Task.Type.OTHER, _link, _request));
|
|
} else {
|
|
_link.schedule(new ServerHandler(Task.Type.OTHER, _link, _request));
|
|
}
|
|
} catch (final ClosedChannelException e) {
|
|
logger.warn("Unable to schedule task because channel is closed");
|
|
}
|
|
}
|
|
}
|
|
|
|
public class StartupTask extends ManagedContextTimerTask {
|
|
protected Link _link;
|
|
protected volatile boolean cancelled = false;
|
|
|
|
public StartupTask(final Link link) {
|
|
logger.debug("Startup task created");
|
|
_link = link;
|
|
}
|
|
|
|
@Override
|
|
public synchronized boolean cancel() {
|
|
// TimerTask.cancel may fail depends on the calling context
|
|
if (!cancelled) {
|
|
cancelled = true;
|
|
_startupWait = _startupWaitDefault;
|
|
logger.debug("Startup task cancelled");
|
|
return super.cancel();
|
|
}
|
|
return true;
|
|
}
|
|
|
|
@Override
|
|
protected synchronized void runInContext() {
|
|
if (!cancelled) {
|
|
logger.info("The startup command is now cancelled");
|
|
cancelled = true;
|
|
_startup = null;
|
|
_startupWait = _startupWaitDefault * 2;
|
|
reconnect(_link);
|
|
}
|
|
}
|
|
}
|
|
|
|
public class AgentRequestHandler extends Task {
|
|
public AgentRequestHandler(final Task.Type type, final Link link, final Request req) {
|
|
super(type, link, req);
|
|
}
|
|
|
|
@Override
|
|
protected void doTask(final Task task) throws TaskExecutionException {
|
|
final Request req = (Request)get();
|
|
if (!(req instanceof Response)) {
|
|
processRequest(req, task.getLink());
|
|
}
|
|
}
|
|
}
|
|
|
|
public class ServerHandler extends Task {
|
|
public ServerHandler(final Task.Type type, final Link link, final byte[] data) {
|
|
super(type, link, data);
|
|
}
|
|
|
|
public ServerHandler(final Task.Type type, final Link link, final Request req) {
|
|
super(type, link, req);
|
|
}
|
|
|
|
@Override
|
|
public void doTask(final Task task) throws TaskExecutionException {
|
|
if (task.getType() == Task.Type.CONNECT) {
|
|
_shell.getBackoffAlgorithm().reset();
|
|
setLink(task.getLink());
|
|
sendStartup(task.getLink());
|
|
} else if (task.getType() == Task.Type.DATA) {
|
|
Request request;
|
|
try {
|
|
request = Request.parse(task.getData());
|
|
if (request instanceof Response) {
|
|
//It's for pinganswer etc, should be processed immediately.
|
|
processResponse((Response)request, task.getLink());
|
|
} else {
|
|
//put the requests from mgt server into another thread pool, as the request may take a longer time to finish. Don't block the NIO main thread pool
|
|
//processRequest(request, task.getLink());
|
|
_executor.submit(new AgentRequestHandler(getType(), getLink(), request));
|
|
}
|
|
} catch (final ClassNotFoundException e) {
|
|
logger.error("Unable to find this request ");
|
|
} catch (final Exception e) {
|
|
logger.error("Error parsing task", e);
|
|
}
|
|
} else if (task.getType() == Task.Type.DISCONNECT) {
|
|
reconnect(task.getLink());
|
|
return;
|
|
} else if (task.getType() == Task.Type.OTHER) {
|
|
processOtherTask(task);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Task stops the current agent and launches a new agent
|
|
* when there are no outstanding jobs in the agent's task queue
|
|
*/
|
|
public class PostCertificateRenewalTask extends ManagedContextTimerTask {
|
|
|
|
private Agent agent;
|
|
|
|
public PostCertificateRenewalTask(final Agent agent) {
|
|
this.agent = agent;
|
|
}
|
|
|
|
@Override
|
|
protected void runInContext() {
|
|
while (true) {
|
|
try {
|
|
if (_inProgress.get() == 0) {
|
|
logger.debug("Running post certificate renewal task to restart services.");
|
|
|
|
// Let the resource perform any post certificate renewal cleanups
|
|
_resource.executeRequest(new PostCertificateRenewalCommand());
|
|
|
|
IAgentShell shell = agent._shell;
|
|
ServerResource resource = agent._resource.getClass().newInstance();
|
|
|
|
// Stop current agent
|
|
agent.cancelTasks();
|
|
agent._reconnectAllowed = false;
|
|
Runtime.getRuntime().removeShutdownHook(agent._shutdownThread);
|
|
agent.stop(ShutdownCommand.Requested, "Restarting due to new X509 certificates");
|
|
|
|
// Nullify references for GC
|
|
agent._shell = null;
|
|
agent._watchList = null;
|
|
agent._shutdownThread = null;
|
|
agent._controlListeners = null;
|
|
agent = null;
|
|
|
|
// Start a new agent instance
|
|
shell.launchNewAgent(resource);
|
|
return;
|
|
}
|
|
logger.debug("Other tasks are in progress, will retry post certificate renewal command after few seconds");
|
|
|
|
Thread.sleep(5000);
|
|
} catch (final Exception e) {
|
|
logger.warn("Failed to execute post certificate renewal command:", e);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
public class PreferredHostCheckerTask extends ManagedContextTimerTask {
|
|
|
|
@Override
|
|
protected void runInContext() {
|
|
try {
|
|
final String[] msList = _shell.getHosts();
|
|
if (msList == null || msList.length < 1) {
|
|
return;
|
|
}
|
|
final String preferredHost = msList[0];
|
|
final String connectedHost = _shell.getConnectedHost();
|
|
logger.trace("Running preferred host checker task, connected host={}, preferred host={}", connectedHost, preferredHost);
|
|
|
|
if (preferredHost != null && !preferredHost.equals(connectedHost) && _link != null) {
|
|
boolean isHostUp = true;
|
|
try (final Socket socket = new Socket()) {
|
|
socket.connect(new InetSocketAddress(preferredHost, _shell.getPort()), 5000);
|
|
} catch (final IOException e) {
|
|
isHostUp = false;
|
|
logger.trace("Host: {} is not reachable", preferredHost);
|
|
|
|
}
|
|
if (isHostUp && _link != null && _inProgress.get() == 0) {
|
|
logger.debug("Preferred host {} is found to be reachable, trying to reconnect", preferredHost);
|
|
|
|
_shell.resetHostCounter();
|
|
reconnect(_link);
|
|
}
|
|
}
|
|
} catch (Throwable t) {
|
|
logger.error("Error caught while attempting to connect to preferred host", t);
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
}
|