mirror of https://github.com/apache/cloudstack.git
104 lines
3.6 KiB
Java
104 lines
3.6 KiB
Java
/**
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* Copyright (C) 2011 Cloud.com, Inc. All rights reserved.
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*/
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package com.cloud.ha;
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import java.util.Date;
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import java.util.Map;
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import java.util.concurrent.TimeUnit;
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import javax.ejb.Local;
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import javax.naming.ConfigurationException;
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import com.cloud.alert.AlertManager;
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import com.cloud.configuration.dao.ConfigurationDao;
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import com.cloud.server.ManagementServer;
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import com.cloud.usage.dao.UsageJobDao;
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import com.cloud.utils.component.ComponentLocator;
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import com.cloud.utils.component.Inject;
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import com.cloud.utils.db.Transaction;
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@Local(value={HighAvailabilityManager.class})
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public class HighAvailabilityManagerExtImpl extends HighAvailabilityManagerImpl {
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@Inject
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UsageJobDao _usageJobDao;
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ConfigurationDao configDao;
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@Override
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public boolean configure(final String name, final Map<String, Object> xmlParams) throws ConfigurationException {
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super.configure(name, xmlParams);
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ComponentLocator locator = ComponentLocator.getLocator(ManagementServer.Name);
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configDao = locator.getDao(ConfigurationDao.class);
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if (configDao == null)
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{
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s_logger.warn("Unable to get a configuration dao to check config value for enableUsageServer");
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return false;
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}
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return true;
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}
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@Override
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public boolean start()
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{
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super.start();
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boolean enableUsage = new Boolean(configDao.getValue("enable.usage.server"));
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//By default, usage is enabled for production
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//Devs might override this value to disable usage in their setup
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if(enableUsage)
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{
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_executor.scheduleAtFixedRate(new UsageServerMonitorTask(), 60*60, 10*60, TimeUnit.SECONDS); // schedule starting in one hour to execute every 10 minutes
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}
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return true;
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}
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protected class UsageServerMonitorTask implements Runnable {
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@Override
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public void run() {
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if (s_logger.isInfoEnabled()) {
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s_logger.info("checking health of usage server");
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}
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try {
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boolean isRunning = false;
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Transaction txn = Transaction.open(Transaction.USAGE_DB);
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try {
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Date lastHeartbeat = _usageJobDao.getLastHeartbeat();
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if (lastHeartbeat != null) {
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long sinceLastHeartbeat = System.currentTimeMillis() - lastHeartbeat.getTime();
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if (sinceLastHeartbeat <= (10 * 60 * 1000)) {
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// if it's been less than 10 minutes since the last heartbeat, then it appears to be running, otherwise send an alert
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isRunning = true;
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}
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}
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if (s_logger.isDebugEnabled()) {
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s_logger.debug("usage server running? " + isRunning + ", heartbeat: " + lastHeartbeat);
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}
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} finally {
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txn.close();
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// switch back to VMOPS db
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Transaction swap = Transaction.open(Transaction.CLOUD_DB);
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swap.close();
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}
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if (!isRunning) {
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_alertMgr.sendAlert(AlertManager.ALERT_TYPE_USAGE_SERVER, 0, new Long(0), "No usage server process running", "No usage server process has been detected, some attention is required");
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} else {
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_alertMgr.clearAlert(AlertManager.ALERT_TYPE_USAGE_SERVER, 0, 0);
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}
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} catch (Exception ex) {
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s_logger.warn("Error while monitoring usage job", ex);
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}
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}
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}
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}
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