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/* |
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* i-scream central monitoring system |
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* http://www.i-scream.org.uk |
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* Copyright (C) 2000-2002 i-scream |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* as published by the Free Software Foundation; either version 2 |
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* of the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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*/ |
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|
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//---PACKAGE DECLARATION--- |
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package uk.org.iscream.client.monitors; |
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package uk.org.iscream.cms.server.client.monitors; |
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//---IMPORTS--- |
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import java.util.HashMap; |
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import java.util.ArrayList; |
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import java.util.HashSet; |
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import java.util.Set; |
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import java.util.Iterator; |
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import java.text.NumberFormat; |
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import uk.org.iscream.client.*; |
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import uk.org.iscream.core.*; |
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import uk.org.iscream.util.*; |
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import uk.org.iscream.componentmanager.*; |
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import uk.org.iscream.cms.server.client.*; |
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import uk.org.iscream.cms.server.core.*; |
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import uk.org.iscream.cms.util.*; |
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import uk.org.iscream.cms.server.componentmanager.*; |
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/** |
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* This Monitor watches the Disks for all machines |
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*/ |
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public final String REVISION = "$Revision$"; |
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|
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/** |
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* A description of this monitor |
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*/ |
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public final String DESC = "Monitors all host disks."; |
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|
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//---STATIC METHODS--- |
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//---CONSTRUCTORS--- |
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//---PUBLIC METHODS--- |
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|
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/** |
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* Analyse a packet of data, and generate an alert if |
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* necessary. |
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* |
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* @param packet the XMLPacket to analyse |
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*/ |
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public void analysePacket(XMLPacket packet) { |
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String source = packet.getParam("packet.attributes.machine_name"); |
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if(!checkBooleanConfig(source, "Monitor." + _name + ".enable")) { |
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return; |
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} |
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if (!_hosts.containsKey(source)) { |
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_hosts.put(source, new HashMap()); |
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} |
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if (!_hostsInode.containsKey(source)) { |
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_hostsInode.put(source, new HashMap()); |
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} |
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HashMap diskRegisters = (HashMap) _hosts.get(source); |
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HashMap diskInodeRegisters = (HashMap) _hostsInode.get(source); |
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|
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// key prefix |
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String keyPrefix = "packet.disk.p"; |
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|
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// a temporary holder for all the disk attributes we find |
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HashSet disks = new HashSet(); |
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|
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// a tempory holder for all the disk attributes we find |
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ArrayList disks = new ArrayList(); |
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|
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// unfortunatly we need to check the whole packet |
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// to find the disks, and then get the data attributes |
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Set packetSet = packet.getSet(); |
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Iterator i = packetSet.iterator(); |
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while (i.hasNext()) { |
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String dataKey = (String) i.next(); |
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if(dataKey.startsWith("packet.disk.p")) { |
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if(!disks.contains(dataKey)) { |
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String diskNumber = ""; |
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if(dataKey.startsWith(keyPrefix)) { |
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// pos is after "packet.disk.p" |
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int pos = keyPrefix.length(); |
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String diskNumber = dataKey.substring(pos, dataKey.indexOf('.', pos)); |
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String thisDisk = keyPrefix.concat(diskNumber); |
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|
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if(!disks.contains(thisDisk)) { |
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// add the disk to our list |
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disks.add(thisDisk); |
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|
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// pos is after "packet.disk.p" |
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int pos = 13; |
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while (dataKey.charAt(pos) != '.') { |
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diskNumber = diskNumber + dataKey.charAt(pos); |
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pos++; |
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} |
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|
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// add the disk to our list, with the packet data |
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|
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// used (we won't use this value - but we need it to forget about it ;) |
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disks.add("packet.disk.p" + diskNumber + ".attributes.used"); |
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|
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// device |
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disks.add("packet.disk.p" + diskNumber + ".attributes.name"); |
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String device = packet.getParam("packet.disk.p" + diskNumber + ".attributes.name"); |
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String device = packet.getParam(thisDisk + ".attributes.name"); |
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// mount point |
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disks.add("packet.disk.p" + diskNumber + ".attributes.mount"); |
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String mount = packet.getParam("packet.disk.p" + diskNumber + ".attributes.mount"); |
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String mount = packet.getParam(thisDisk + ".attributes.mount"); |
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|
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// these next two will be used to calculate the %age |
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// total |
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disks.add("packet.disk.p" + diskNumber + ".attributes.kbytes"); |
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String total = packet.getParam("packet.disk.p" + diskNumber + ".attributes.kbytes"); |
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String total = packet.getParam(thisDisk + ".attributes.total"); |
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// available |
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disks.add("packet.disk.p" + diskNumber + ".attributes.avail"); |
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String avail = packet.getParam("packet.disk.p" + diskNumber + ".attributes.avail"); |
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String avail = packet.getParam(thisDisk + ".attributes.avail"); |
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|
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String totalInodes = packet.getParam(thisDisk + ".attributes.totalinodes"); |
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String availInodes = packet.getParam(thisDisk + ".attributes.freeinodes"); |
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|
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// *** now process this disk *** |
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|
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// check if we've seen this disk before on a previous run |
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// if not, we need to create a register for it |
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if(!diskRegisters.containsKey(diskNumber)) { |
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diskRegisters.put(diskNumber, new Register(source, _name, mount)); |
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// nb. use the mount as the key as this is unlikely to change, |
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// unlike diskNumber which could easily change |
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// (diskNumber is based on the order of df's output!) |
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if(!diskRegisters.containsKey(mount)) { |
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diskRegisters.put(mount, new Register(source, _name, mount)); |
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} |
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if(!diskInodeRegisters.containsKey(mount)) { |
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diskInodeRegisters.put(mount, new Register(source, _nameInode, mount)); |
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} |
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|
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// get the register for this disk |
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Register reg = (Register) diskRegisters.get(diskNumber); |
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Register reg = (Register) diskRegisters.get(mount); |
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Register regInode = (Register) diskInodeRegisters.get(mount); |
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|
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// get the packet data |
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double diskTotal, diskAvail; |
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int diskInodeTotal, diskInodeAvail; |
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try { |
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|
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if(total==null || avail==null) { |
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if(total==null || avail==null || totalInodes==null || availInodes==null) { |
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throw new NumberFormatException("Disk data invalid"); |
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} |
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diskTotal = Double.parseDouble(total); |
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diskAvail = Double.parseDouble(avail); |
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diskInodeTotal = Integer.parseInt(totalInodes); |
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diskInodeAvail = Integer.parseInt(availInodes); |
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} catch (NumberFormatException e) { |
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_logger.write(this.toString(), Logger.WARNING, "Received packet from "+source+" with bad disk information: "+e); |
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// don't try to continue and process, try next disk |
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} |
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boolean useValue = false; |
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boolean useValueInode = false; |
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try { |
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String option = _cp.getProperty("Host." + source, "Monitor." + _name + ".thresholdMeasure"); |
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// try looking for a mount-point specific thresholdMeasure first |
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String option = _cp.getProperty("Host." + source, "Monitor." + _name + "." + mount + ".thresholdMeasure"); |
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if (option.equals("VALUE")) { |
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useValue = true; |
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} |
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} |
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option = _cp.getProperty("Host." + source, "Monitor." + _nameInode + "." + mount + ".thresholdMeasure"); |
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if (option.equals("VALUE")) { |
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useValueInode = true; |
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} |
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} catch (PropertyNotFoundException e) { |
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// we default to percentage |
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try { |
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// now look for a more general thresholdMeasure |
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String option = _cp.getProperty("Host." + source, "Monitor." + _name + ".thresholdMeasure"); |
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if (option.equals("VALUE")) { |
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useValue = true; |
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} |
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option = _cp.getProperty("Host." + source, "Monitor." + _nameInode + ".thresholdMeasure"); |
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if (option.equals("VALUE")) { |
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useValueInode = true; |
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} |
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} catch (PropertyNotFoundException f) { |
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// we default to percentage in any case |
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} |
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} |
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|
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// this bit determines if the disk check is a % check |
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// or a kb check |
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double diskInUse; |
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// or a byte check |
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String type; |
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double curValue; |
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int newThreshold; |
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if(useValue) { |
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// kb disk in use |
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diskInUse = diskTotal - diskAvail; |
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type = "kb"; |
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// byte disk available |
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curValue = diskAvail; |
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// negate check |
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newThreshold = checkAttributeThreshold(curValue, reg, true); |
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type = "bytes"; |
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} else { |
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// % disk in use |
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diskInUse = (1 - (diskAvail / diskTotal)) * 100; |
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curValue = (1 - ((double)diskAvail / (double)diskTotal)) * 100; |
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// normal check |
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newThreshold = checkAttributeThreshold(curValue, reg, false); |
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type = "%"; |
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} |
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int newThreshold = checkAttributeThreshold(diskInUse, reg); |
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String typeInode; |
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double curValueInode; |
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int newThresholdInode; |
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if(useValueInode) { |
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// inodes available |
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curValueInode = diskInodeAvail; |
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// negate check |
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newThresholdInode = checkAttributeThreshold(curValueInode, regInode, true); |
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typeInode = "count"; |
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} else { |
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// % inodes in use |
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curValueInode = (1 - ((double)diskInodeAvail / (double)diskInodeTotal)) * 100; |
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// normal check |
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newThresholdInode = checkAttributeThreshold(curValueInode, regInode, false); |
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typeInode = "%"; |
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} |
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|
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// format the diskInUse to a String |
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NumberFormat nf = NumberFormat.getInstance(); |
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nf.setMaximumFractionDigits(2); |
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nf.setMinimumFractionDigits(2); |
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String strDiskInUse = nf.format(diskInUse); |
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String strCurValue = nf.format(curValue); |
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String strCurValueInode = nf.format(curValueInode); |
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|
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// say which disk had the problem |
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String attributeName = "Disk in use " + type + " on " + mount + " (" + device + ")"; |
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String attributeNameInode = "Disk inodes in use " + type + " on " + mount + " (" + device +")"; |
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|
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processAlert(newThreshold, attributeName, reg, source, strDiskInUse); |
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processAlert(newThreshold, attributeName, reg, source, strCurValue); |
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processAlert(newThresholdInode, attributeNameInode, regInode, source, strCurValueInode); |
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} |
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} |
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} |
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* Overrides the {@link java.lang.Object#toString() Object.toString()} |
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* method to provide clean logging (every class should have this). |
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* |
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* This uses the uk.org.iscream.util.NameFormat class |
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* This uses the uk.org.iscream.cms.util.NameFormat class |
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* to format the toString() |
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* |
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* @return the name of this class and its CVS revision |
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} |
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|
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//---PRIVATE METHODS--- |
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|
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private int checkAttributeThreshold(double diskInUse, Register reg) { |
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|
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/** |
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* Checks a piece of current data, and returns the |
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* threshold it breaches, if any. |
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* |
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* The option to negate the check can be used in |
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* situations where being *below* the threshold |
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* is an 'alertable' situation. In this specific |
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* case, we'd do this with kb disk checks. |
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* |
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* @param value the current value |
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* @param reg the Register for the host |
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* @param negateCheck whether to negate the check |
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* @return the threshold level breached, if any |
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*/ |
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private int checkAttributeThreshold(double value, Register reg, boolean negateCheck) { |
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for(int thresholdLevel = Alert.thresholdLevels.length - 1; thresholdLevel >= 0; thresholdLevel--) { |
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if (reg.getThreshold(thresholdLevel) != -1.0) { |
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if(((double) reg.getThreshold(thresholdLevel)) < diskInUse) { |
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return thresholdLevel; |
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if(!negateCheck) { |
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// normal check - has the value gone *over* the threshold |
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if(((double) reg.getThreshold(thresholdLevel)) < value) { |
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return thresholdLevel; |
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} |
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} |
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else { |
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// negated check - has the value gone *under* the threshold |
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if(((double) reg.getThreshold(thresholdLevel)) > value) { |
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return thresholdLevel; |
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} |
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} |
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} |
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} |
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return Alert.thresholdNORMAL; |
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|
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//---ACCESSOR/MUTATOR METHODS--- |
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|
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/** |
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* Returns a reference to a specific Queue for this |
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* monitor. This Queue returns only the data packets |
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* (based on type) that we want too look at. |
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* |
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* @return a reference to a Queue |
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*/ |
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protected Queue getQueue() { |
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return MonitorManager.getInstance().getDataQueue(); |
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} |
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private String _name = "Disk"; |
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|
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/** |
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* Inodes have the name "DiskInode" in the |
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* configuration. |
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*/ |
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private String _nameInode = "DiskInode"; |
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|
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/** |
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* A reference to the configuration proxy in use |
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*/ |
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private ConfigurationProxy _cp = ConfigurationProxy.getInstance(); |
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< |
|
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> |
|
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/** |
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* A HashMap of Registers (or groups of Registers), one |
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* for each host we're monitoring. |
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> |
*/ |
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|
private HashMap _hosts = new HashMap(); |
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|
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/** |
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* A HashMap of Registers (or groups of Registers), one |
| 340 |
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* for each host we're monitoring (inodes). |
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*/ |
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private HashMap _hostsInode = new HashMap(); |
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|
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//---STATIC ATTRIBUTES--- |
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|
