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Plugin used to manage virtualization
/*
* RHQ Management Platform
* Copyright (C) 2005-2008 Red Hat, Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package org.rhq.plugins.virt;
import java.util.Set;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.libvirt.LibvirtException;
import org.libvirt.DomainInfo.DomainState;
import org.rhq.core.domain.configuration.Configuration;
import org.rhq.core.domain.configuration.ConfigurationUpdateStatus;
import org.rhq.core.domain.measurement.AvailabilityType;
import org.rhq.core.domain.measurement.MeasurementDataNumeric;
import org.rhq.core.domain.measurement.MeasurementReport;
import org.rhq.core.domain.measurement.MeasurementScheduleRequest;
import org.rhq.core.pluginapi.configuration.ConfigurationFacet;
import org.rhq.core.pluginapi.configuration.ConfigurationUpdateReport;
import org.rhq.core.pluginapi.inventory.CreateChildResourceFacet;
import org.rhq.core.pluginapi.inventory.CreateResourceReport;
import org.rhq.core.pluginapi.inventory.DeleteResourceFacet;
import org.rhq.core.pluginapi.inventory.InvalidPluginConfigurationException;
import org.rhq.core.pluginapi.inventory.ResourceComponent;
import org.rhq.core.pluginapi.inventory.ResourceContext;
import org.rhq.core.pluginapi.measurement.MeasurementFacet;
import org.rhq.core.pluginapi.operation.OperationFacet;
import org.rhq.core.pluginapi.operation.OperationResult;
/**
* Component for managing both virtual hosts and guests though some features are guest only and only
* defined in the guest metadata.
*
* @author Greg Hinkle
*/
public class VirtualizationDomainComponent implements ResourceComponent, MeasurementFacet,
OperationFacet, ConfigurationFacet, CreateChildResourceFacet, DeleteResourceFacet {
private Log log = LogFactory.getLog(VirtualizationDomainComponent.class);
private String domainName;
private String uri;
private long cpuNanosLast;
private long cpuCheckedLast;
ResourceContext resourceContext;
public void start(ResourceContext resourceContext)
throws InvalidPluginConfigurationException, Exception {
uri = resourceContext.getPluginConfiguration().getSimpleValue("connectionURI", "");
domainName = resourceContext.getResourceKey();
this.resourceContext = resourceContext;
}
public void stop() {
}
public AvailabilityType getAvailability() {
try {
LibVirtConnection virt = getConnection();
DomainState state = virt.getDomainInfo(domainName).domainInfo.state;
switch (state) {
case VIR_DOMAIN_RUNNING:
return AvailabilityType.UP;
case VIR_DOMAIN_PAUSED:
return AvailabilityType.UP;
default:
return AvailabilityType.DOWN;
}
} catch (LibvirtException e) {
log.error("Exception caught retriveing the domain info for " + domainName);
throw new RuntimeException(e);
}
}
public void getValues(MeasurementReport report, Set metrics) throws Exception {
LibVirtConnection virt = this.getConnection();
for (MeasurementScheduleRequest request : metrics) {
if (request.getName().equals("cpuTime")) {
report.addData(new MeasurementDataNumeric(request,
(double) virt.getDomainInfo(domainName).domainInfo.cpuTime));
} else if (request.getName().equals("cpuPercentage")) {
long checked = System.nanoTime();
long cpuNanos = virt.getDomainInfo(domainName).domainInfo.cpuTime;
if (cpuCheckedLast != 0) {
long duration = checked - cpuCheckedLast;
long diff = cpuNanos - cpuNanosLast;
double percentage = ((double) diff) / ((double) duration);
report.addData(new MeasurementDataNumeric(request, percentage));
}
cpuCheckedLast = checked;
cpuNanosLast = cpuNanos;
} else if (request.getName().equals("memoryUsage")) {
report.addData(new MeasurementDataNumeric(request,
(double) virt.getDomainInfo(domainName).domainInfo.memory));
}
}
}
public OperationResult invokeOperation(String name, Configuration parameters) throws InterruptedException,
Exception {
int result = -1;
LibVirtConnection virt = getConnection();
log.info("Executing " + name + " operation on domain " + getDomainName());
if (name.equals("reboot")) {
result = virt.domainReboot(this.domainName);
} else if (name.equals("restore")) {
result = virt.domainRestore(parameters.getSimpleValue("fromPath", null));
} else if (name.equals("resume")) {
result = virt.domainResume(this.domainName);
} else if (name.equals("save")) {
result = virt.domainSave(this.domainName, parameters.getSimpleValue("toPath", null));
} else if (name.equals("shutdown")) {
result = virt.domainShutdown(this.domainName);
} else if (name.equals("suspend")) {
result = virt.domainSuspend(this.domainName);
} else if (name.equals("start")) {
result = virt.domainCreate(this.domainName);
} else if (name.equals("destroy")) {
result = virt.domainDestroy(this.domainName);
}
if (result < 0) {
throw new Exception("Failed to run " + name + " command. Result was: " + result);
} else {
return new OperationResult();
}
}
public Configuration loadResourceConfiguration() throws LibvirtException {
LibVirtConnection virt = getConnection();
String xml = virt.getDomainXML(this.domainName);
return XMLEditor.getDomainConfiguration(xml);
}
public void updateResourceConfiguration(ConfigurationUpdateReport report) {
try {
LibVirtConnection virt = getConnection();
String xml = virt.getDomainXML(this.domainName);
Configuration oldConfig = loadResourceConfiguration();
if (oldConfig == null) {
throw new IllegalStateException("Failed to parse the XML specification for domain '" + domainName + "'.");
}
Configuration newConfig = report.getConfiguration();
String newXml = XMLEditor.updateDomainXML(report.getConfiguration(), xml);
log.info("Calling libvirt to redefine domain");
if (!virt.defineDomain(newXml)) {
log.warn("Call to redefine domain did not return a domain pointer");
}
// TODO GH: There seems to be some situations where an xml define doesn't change settings so we try a more direct approach here
// TODO BK: Make this operations on the domain
if (!oldConfig.getSimple("memory").getLongValue().equals(newConfig.getSimple("memory").getLongValue())) {
virt.setMaxMemory(domainName, newConfig.getSimple("memory").getLongValue());
}
if (!oldConfig.getSimple("currentMemory").getLongValue().equals(
newConfig.getSimple("currentMemory").getLongValue())) {
virt.setMemory(domainName, newConfig.getSimple("currentMemory").getLongValue());
}
if (!oldConfig.getSimple("vcpu").getIntegerValue().equals(newConfig.getSimple("vcpu").getIntegerValue())) {
virt.setVcpus(domainName, newConfig.getSimple("vcpu").getIntegerValue());
}
report.setStatus(ConfigurationUpdateStatus.SUCCESS);
} catch (LibvirtException e) {
throw new RuntimeException(e);
}
}
public CreateResourceReport createResource(CreateResourceReport report) {
String xml = XMLEditor.getDomainXml(report.getResourceConfiguration());
/*
log.info("Defining new domain");
log.debug("New virtualization domain xml:\n" + xml);
try {
this.virt.defineDomain(xml);
report.setStatus(CreateResourceStatus.SUCCESS);
} catch (LibvirtException e) {
log.error("Exception creating the domain", e);
report.setStatus(CreateResourceStatus.FAILURE);
}*/
return report;
}
public LibVirtConnection getConnection() throws LibvirtException {
return resourceContext.getParentResourceComponent().getConnection();
}
public String getDomainName() {
return this.domainName;
}
public void deleteResource() throws Exception {
LibVirtConnection virt = this.getConnection() ;
virt.domainDelete(domainName) ;
}
}