// Licensed to the Apache Software Foundation (ASF) under one // or more contributor license agreements. See the NOTICE file // distributed with this work for additional information // regarding copyright ownership. The ASF licenses this file // to you under the Apache License, Version 2.0 (the // "License"); you may not use this file except in compliance // with the License. You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, // software distributed under the License is distributed on an // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY // KIND, either express or implied. See the License for the // specific language governing permissions and limitations // under the License. package com.cloud.alert; import java.util.Map; import javax.inject.Inject; import javax.naming.ConfigurationException; import org.apache.log4j.Logger; import org.springframework.stereotype.Component; import com.cloud.cluster.ClusterManager; import com.cloud.cluster.ClusterNodeJoinEventArgs; import com.cloud.cluster.ClusterNodeLeftEventArgs; import com.cloud.cluster.ManagementServerHostVO; import com.cloud.cluster.dao.ManagementServerHostDao; import com.cloud.utils.component.AdapterBase; import com.cloud.utils.events.EventArgs; import com.cloud.utils.events.SubscriptionMgr; @Component public class ClusterAlertAdapter extends AdapterBase implements AlertAdapter { private static final Logger s_logger = Logger.getLogger(ClusterAlertAdapter.class); @Inject private AlertManager _alertMgr; @Inject private ManagementServerHostDao _mshostDao; public void onClusterAlert(Object sender, EventArgs args) { if (s_logger.isDebugEnabled()) { s_logger.debug("Receive cluster alert, EventArgs: " + args.getClass().getName()); } if (args instanceof ClusterNodeJoinEventArgs) { onClusterNodeJoined(sender, (ClusterNodeJoinEventArgs)args); } else if (args instanceof ClusterNodeLeftEventArgs) { onClusterNodeLeft(sender, (ClusterNodeLeftEventArgs)args); } else { s_logger.error("Unrecognized cluster alert event"); } } private void onClusterNodeJoined(Object sender, ClusterNodeJoinEventArgs args) { if (s_logger.isDebugEnabled()) { for (ManagementServerHostVO mshost : args.getJoinedNodes()) { s_logger.debug("Handle cluster node join alert, joined node: " + mshost.getServiceIP() + ", msidL: " + mshost.getMsid()); } } for (ManagementServerHostVO mshost : args.getJoinedNodes()) { if (mshost.getId() == args.getSelf().longValue()) { if (s_logger.isDebugEnabled()) { s_logger.debug("Management server node " + mshost.getServiceIP() + " is up, send alert"); } _alertMgr.sendAlert(AlertManager.AlertType.ALERT_TYPE_MANAGMENT_NODE, 0, new Long(0), "Management server node " + mshost.getServiceIP() + " is up", ""); break; } } } private void onClusterNodeLeft(Object sender, ClusterNodeLeftEventArgs args) { if (s_logger.isDebugEnabled()) { for (ManagementServerHostVO mshost : args.getLeftNodes()) { s_logger.debug("Handle cluster node left alert, leaving node: " + mshost.getServiceIP() + ", msid: " + mshost.getMsid()); } } for (ManagementServerHostVO mshost : args.getLeftNodes()) { if (mshost.getId() != args.getSelf().longValue()) { if (_mshostDao.increaseAlertCount(mshost.getId()) > 0) { if (s_logger.isDebugEnabled()) { s_logger.debug("Detected management server node " + mshost.getServiceIP() + " is down, send alert"); } _alertMgr.sendAlert(AlertManager.AlertType.ALERT_TYPE_MANAGMENT_NODE, 0, new Long(0), "Management server node " + mshost.getServiceIP() + " is down", ""); } else { if (s_logger.isDebugEnabled()) { s_logger.debug("Detected management server node " + mshost.getServiceIP() + " is down, but alert has already been set"); } } } } } @Override public boolean configure(String name, Map<String, Object> params) throws ConfigurationException { if (s_logger.isInfoEnabled()) { s_logger.info("Start configuring cluster alert manager : " + name); } try { SubscriptionMgr.getInstance().subscribe(ClusterManager.ALERT_SUBJECT, this, "onClusterAlert"); } catch (SecurityException e) { throw new ConfigurationException("Unable to register cluster event subscription"); } catch (NoSuchMethodException e) { throw new ConfigurationException("Unable to register cluster event subscription"); } return true; } }