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// 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.hypervisor;
import com.cloud.agent.api.Command;
import com.cloud.agent.api.to.DataObjectType;
import com.cloud.agent.api.to.VirtualMachineTO;
import com.cloud.host.HostVO;
import com.cloud.host.dao.HostDao;
import com.cloud.hypervisor.Hypervisor.HypervisorType;
import com.cloud.storage.DataStoreRole;
import com.cloud.storage.GuestOSHypervisorVO;
import com.cloud.storage.GuestOSVO;
import com.cloud.storage.dao.GuestOSDao;
import com.cloud.storage.dao.GuestOSHypervisorDao;
import com.cloud.utils.Pair;
import com.cloud.utils.exception.CloudRuntimeException;
import com.cloud.vm.VirtualMachine;
import com.cloud.vm.VirtualMachineProfile;
import org.apache.cloudstack.storage.command.CopyCommand;
import org.apache.cloudstack.storage.command.StorageSubSystemCommand;
import org.apache.log4j.Logger;
import javax.inject.Inject;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.Map;
public class KVMGuru extends HypervisorGuruBase implements HypervisorGuru {
@Inject
GuestOSDao _guestOsDao;
@Inject
GuestOSHypervisorDao _guestOsHypervisorDao;
@Inject
HostDao _hostDao;
public static final Logger s_logger = Logger.getLogger(KVMGuru.class);
@Override
public HypervisorType getHypervisorType() {
return HypervisorType.KVM;
}
protected KVMGuru() {
super();
}
/**
* Retrieve host max CPU speed
*/
protected double getHostCPUSpeed(HostVO host) {
return host.getSpeed();
}
protected double getVmSpeed(VirtualMachineTO to) {
return to.getMaxSpeed() != null ? to.getMaxSpeed() : to.getSpeed();
}
/**
* Set VM CPU quota percentage with respect to host CPU on 'to' if CPU limit option is set
* @param to vm to
* @param vmProfile vm profile
*/
protected void setVmQuotaPercentage(VirtualMachineTO to, VirtualMachineProfile vmProfile) {
if (to.getLimitCpuUse()) {
VirtualMachine vm = vmProfile.getVirtualMachine();
HostVO host = _hostDao.findById(vm.getHostId());
if (host == null) {
throw new CloudRuntimeException("Host with id: " + vm.getHostId() + " not found");
}
s_logger.debug("Limiting CPU usage for VM: " + vm.getUuid() + " on host: " + host.getUuid());
double hostMaxSpeed = getHostCPUSpeed(host);
double maxSpeed = getVmSpeed(to);
try {
BigDecimal percent = new BigDecimal(maxSpeed / hostMaxSpeed);
percent = percent.setScale(2, RoundingMode.HALF_DOWN);
if (percent.compareTo(new BigDecimal(1)) == 1) {
s_logger.debug("VM " + vm.getUuid() + " CPU MHz exceeded host " + host.getUuid() + " CPU MHz, limiting VM CPU to the host maximum");
percent = new BigDecimal(1);
}
to.setCpuQuotaPercentage(percent.doubleValue());
s_logger.debug("Host: " + host.getUuid() + " max CPU speed = " + hostMaxSpeed + "MHz, VM: " + vm.getUuid() +
"max CPU speed = " + maxSpeed + "MHz. Setting CPU quota percentage as: " + percent.doubleValue());
} catch (NumberFormatException e) {
s_logger.error("Error calculating VM: " + vm.getUuid() + " quota percentage, it wll not be set. Error: " + e.getMessage(), e);
}
}
}
@Override
public VirtualMachineTO implement(VirtualMachineProfile vm) {
VirtualMachineTO to = toVirtualMachineTO(vm);
setVmQuotaPercentage(to, vm);
// Determine the VM's OS description
GuestOSVO guestOS = _guestOsDao.findByIdIncludingRemoved(vm.getVirtualMachine().getGuestOSId());
to.setOs(guestOS.getDisplayName());
HostVO host = _hostDao.findById(vm.getVirtualMachine().getHostId());
GuestOSHypervisorVO guestOsMapping = null;
if (host != null) {
guestOsMapping = _guestOsHypervisorDao.findByOsIdAndHypervisor(guestOS.getId(), getHypervisorType().toString(), host.getHypervisorVersion());
}
if (guestOsMapping == null || host == null) {
to.setPlatformEmulator("Other");
} else {
to.setPlatformEmulator(guestOsMapping.getGuestOsName());
}
return to;
}
@Override
public Pair<Boolean, Long> getCommandHostDelegation(long hostId, Command cmd) {
if (cmd instanceof CopyCommand) {
CopyCommand c = (CopyCommand) cmd;
boolean inSeq = true;
if (c.getSrcTO().getObjectType() == DataObjectType.SNAPSHOT ||
c.getDestTO().getObjectType() == DataObjectType.SNAPSHOT) {
inSeq = false;
} else if (c.getDestTO().getDataStore().getRole() == DataStoreRole.Image ||
c.getDestTO().getDataStore().getRole() == DataStoreRole.ImageCache) {
inSeq = false;
}
c.setExecuteInSequence(inSeq);
}
if (cmd instanceof StorageSubSystemCommand) {
StorageSubSystemCommand c = (StorageSubSystemCommand)cmd;
c.setExecuteInSequence(false);
}
return new Pair<Boolean, Long>(false, new Long(hostId));
}
@Override
public boolean trackVmHostChange() {
return false;
}
@Override
public Map<String, String> getClusterSettings(long vmId) {
return null;
}
}