Examples with DataCenterDeployment com.cloud.deploy.DataCenterDeployment used on opensource projects

Example 16 with DataCenterDeployment

use of com.cloud.deploy.DataCenterDeployment in project cloudstack by apache.

the class InternalLoadBalancerVMManagerImpl method getDeploymentPlanAndInternalLbVms.

protected Pair<DeploymentPlan, List<DomainRouterVO>> getDeploymentPlanAndInternalLbVms(final DeployDestination dest, final long guestNetworkId, final Ip requestedGuestIp) {
    final long dcId = dest.getDataCenter().getId();
    final DeploymentPlan plan = new DataCenterDeployment(dcId);
    final List<DomainRouterVO> internalLbVms = findInternalLbVms(guestNetworkId, requestedGuestIp);
    return new Pair<DeploymentPlan, List<DomainRouterVO>>(plan, internalLbVms);
}

Example 17 with DataCenterDeployment

use of com.cloud.deploy.DataCenterDeployment in project cloudstack by apache.

the class VirtualMachineManagerImpl method orchestrateMigrateAway.

private void orchestrateMigrateAway(final String vmUuid, final long srcHostId, final DeploymentPlanner planner) throws InsufficientServerCapacityException {
    final VMInstanceVO vm = _vmDao.findByUuid(vmUuid);
    if (vm == null) {
        String message = String.format("Unable to find VM with uuid [%s].", vmUuid);
        s_logger.warn(message);
        throw new CloudRuntimeException(message);
    }
    ServiceOfferingVO offeringVO = _offeringDao.findById(vm.getId(), vm.getServiceOfferingId());
    final VirtualMachineProfile profile = new VirtualMachineProfileImpl(vm, null, offeringVO, null, null);
    final Long hostId = vm.getHostId();
    if (hostId == null) {
        String message = String.format("Unable to migrate %s due to it does not have a host id.", vm.toString());
        s_logger.warn(message);
        throw new CloudRuntimeException(message);
    }
    final Host host = _hostDao.findById(hostId);
    Long poolId = null;
    final List<VolumeVO> vols = _volsDao.findReadyRootVolumesByInstance(vm.getId());
    for (final VolumeVO rootVolumeOfVm : vols) {
        final StoragePoolVO rootDiskPool = _storagePoolDao.findById(rootVolumeOfVm.getPoolId());
        if (rootDiskPool != null) {
            poolId = rootDiskPool.getId();
        }
    }
    final ExcludeList excludes = new ExcludeList();
    excludes.addHost(hostId);
    DataCenterDeployment plan = getMigrationDeployment(vm, host, poolId, excludes);
    DeployDestination dest = null;
    while (true) {
        try {
            plan.setMigrationPlan(true);
            dest = _dpMgr.planDeployment(profile, plan, excludes, planner);
        } catch (final AffinityConflictException e2) {
            String message = String.format("Unable to create deployment, affinity rules associted to the %s conflict.", vm.toString());
            s_logger.warn(message, e2);
            throw new CloudRuntimeException(message, e2);
        }
        if (dest == null) {
            s_logger.warn("Unable to find destination for migrating the vm " + profile);
            throw new InsufficientServerCapacityException("Unable to find a server to migrate to.", DataCenter.class, host.getDataCenterId());
        }
        if (s_logger.isDebugEnabled()) {
            s_logger.debug("Found destination " + dest + " for migrating to.");
        }
        excludes.addHost(dest.getHost().getId());
        try {
            migrate(vm, srcHostId, dest);
            return;
        } catch (ResourceUnavailableException | ConcurrentOperationException e) {
            s_logger.warn(String.format("Unable to migrate %s to %s due to [%s]", vm.toString(), dest.getHost().toString(), e.getMessage()), e);
        }
        try {
            advanceStop(vmUuid, true);
            throw new CloudRuntimeException("Unable to migrate " + vm);
        } catch (final ResourceUnavailableException | ConcurrentOperationException | OperationTimedoutException e) {
            s_logger.error(String.format("Unable to stop %s due to [%s].", vm.toString(), e.getMessage()), e);
            throw new CloudRuntimeException("Unable to migrate " + vm);
        }
    }
}

Example 18 with DataCenterDeployment

use of com.cloud.deploy.DataCenterDeployment in project cloudstack by apache.

the class VirtualMachineManagerImpl method findHostAndMigrate.

@Override
public void findHostAndMigrate(final String vmUuid, final Long newSvcOfferingId, final Map<String, String> customParameters, final ExcludeList excludes) throws InsufficientCapacityException, ConcurrentOperationException, ResourceUnavailableException {
    final VMInstanceVO vm = _vmDao.findByUuid(vmUuid);
    if (vm == null) {
        throw new CloudRuntimeException("Unable to find " + vmUuid);
    }
    ServiceOfferingVO newServiceOffering = _offeringDao.findById(newSvcOfferingId);
    if (newServiceOffering.isDynamic()) {
        newServiceOffering.setDynamicFlag(true);
        newServiceOffering = _offeringDao.getComputeOffering(newServiceOffering, customParameters);
    }
    final VirtualMachineProfile profile = new VirtualMachineProfileImpl(vm, null, newServiceOffering, null, null);
    final Long srcHostId = vm.getHostId();
    final Long oldSvcOfferingId = vm.getServiceOfferingId();
    if (srcHostId == null) {
        throw new CloudRuntimeException("Unable to scale the vm because it doesn't have a host id");
    }
    final Host host = _hostDao.findById(srcHostId);
    final DataCenterDeployment plan = new DataCenterDeployment(host.getDataCenterId(), host.getPodId(), host.getClusterId(), null, null, null);
    excludes.addHost(vm.getHostId());
    vm.setServiceOfferingId(newSvcOfferingId);
    DeployDestination dest = null;
    try {
        dest = _dpMgr.planDeployment(profile, plan, excludes, null);
    } catch (final AffinityConflictException e2) {
        String message = String.format("Unable to create deployment, affinity rules associted to the %s conflict.", vm.toString());
        s_logger.warn(message, e2);
        throw new CloudRuntimeException(message);
    }
    if (dest != null) {
        if (s_logger.isDebugEnabled()) {
            s_logger.debug(" Found " + dest + " for scaling the vm to.");
        }
    }
    if (dest == null) {
        throw new InsufficientServerCapacityException("Unable to find a server to scale the vm to.", host.getClusterId());
    }
    excludes.addHost(dest.getHost().getId());
    try {
        migrateForScale(vm.getUuid(), srcHostId, dest, oldSvcOfferingId);
    } catch (ResourceUnavailableException | ConcurrentOperationException e) {
        s_logger.warn(String.format("Unable to migrate %s to %s due to [%s]", vm.toString(), dest.getHost().toString(), e.getMessage()), e);
        throw e;
    }
}

Example 19 with DataCenterDeployment

use of com.cloud.deploy.DataCenterDeployment in project cloudstack by apache.

the class VirtualMachineManagerImpl method orchestrateStart.

@Override
public void orchestrateStart(final String vmUuid, final Map<VirtualMachineProfile.Param, Object> params, final DeploymentPlan planToDeploy, final DeploymentPlanner planner) throws InsufficientCapacityException, ConcurrentOperationException, ResourceUnavailableException {
    final CallContext cctxt = CallContext.current();
    final Account account = cctxt.getCallingAccount();
    final User caller = cctxt.getCallingUser();
    VMInstanceVO vm = _vmDao.findByUuid(vmUuid);
    final VirtualMachineGuru vmGuru = getVmGuru(vm);
    final Ternary<VMInstanceVO, ReservationContext, ItWorkVO> start = changeToStartState(vmGuru, vm, caller, account);
    if (start == null) {
        return;
    }
    vm = start.first();
    final ReservationContext ctx = start.second();
    ItWorkVO work = start.third();
    VMInstanceVO startedVm = null;
    final ServiceOfferingVO offering = _offeringDao.findById(vm.getId(), vm.getServiceOfferingId());
    final VirtualMachineTemplate template = _entityMgr.findByIdIncludingRemoved(VirtualMachineTemplate.class, vm.getTemplateId());
    DataCenterDeployment plan = new DataCenterDeployment(vm.getDataCenterId(), vm.getPodIdToDeployIn(), null, null, null, null, ctx);
    if (planToDeploy != null && planToDeploy.getDataCenterId() != 0) {
        if (s_logger.isDebugEnabled()) {
            s_logger.debug("advanceStart: DeploymentPlan is provided, using dcId:" + planToDeploy.getDataCenterId() + ", podId: " + planToDeploy.getPodId() + ", clusterId: " + planToDeploy.getClusterId() + ", hostId: " + planToDeploy.getHostId() + ", poolId: " + planToDeploy.getPoolId());
        }
        plan = new DataCenterDeployment(planToDeploy.getDataCenterId(), planToDeploy.getPodId(), planToDeploy.getClusterId(), planToDeploy.getHostId(), planToDeploy.getPoolId(), planToDeploy.getPhysicalNetworkId(), ctx);
    }
    final HypervisorGuru hvGuru = _hvGuruMgr.getGuru(vm.getHypervisorType());
    // check resource count if ResourceCountRunningVMsonly.value() = true
    final Account owner = _entityMgr.findById(Account.class, vm.getAccountId());
    if (VirtualMachine.Type.User.equals(vm.type) && ResourceCountRunningVMsonly.value()) {
        resourceCountIncrement(owner.getAccountId(), new Long(offering.getCpu()), new Long(offering.getRamSize()));
    }
    boolean canRetry = true;
    ExcludeList avoids = null;
    try {
        final Journal journal = start.second().getJournal();
        if (planToDeploy != null) {
            avoids = planToDeploy.getAvoids();
        }
        if (avoids == null) {
            avoids = new ExcludeList();
        }
        if (s_logger.isDebugEnabled()) {
            s_logger.debug("Deploy avoids pods: " + avoids.getPodsToAvoid() + ", clusters: " + avoids.getClustersToAvoid() + ", hosts: " + avoids.getHostsToAvoid());
        }
        boolean planChangedByVolume = false;
        boolean reuseVolume = true;
        final DataCenterDeployment originalPlan = plan;
        int retry = StartRetry.value();
        while (retry-- != 0) {
            s_logger.debug("VM start attempt #" + (StartRetry.value() - retry));
            if (reuseVolume) {
                final List<VolumeVO> vols = _volsDao.findReadyRootVolumesByInstance(vm.getId());
                for (final VolumeVO vol : vols) {
                    final Long volTemplateId = vol.getTemplateId();
                    if (volTemplateId != null && volTemplateId != template.getId()) {
                        if (s_logger.isDebugEnabled()) {
                            s_logger.debug(vol + " of " + vm + " is READY, but template ids don't match, let the planner reassign a new pool");
                        }
                        continue;
                    }
                    final StoragePool pool = (StoragePool) dataStoreMgr.getPrimaryDataStore(vol.getPoolId());
                    if (!pool.isInMaintenance()) {
                        if (s_logger.isDebugEnabled()) {
                            s_logger.debug("Root volume is ready, need to place VM in volume's cluster");
                        }
                        final long rootVolDcId = pool.getDataCenterId();
                        final Long rootVolPodId = pool.getPodId();
                        final Long rootVolClusterId = pool.getClusterId();
                        if (planToDeploy != null && planToDeploy.getDataCenterId() != 0) {
                            final Long clusterIdSpecified = planToDeploy.getClusterId();
                            if (clusterIdSpecified != null && rootVolClusterId != null) {
                                if (!rootVolClusterId.equals(clusterIdSpecified)) {
                                    if (s_logger.isDebugEnabled()) {
                                        s_logger.debug("Cannot satisfy the deployment plan passed in since the ready Root volume is in different cluster. volume's cluster: " + rootVolClusterId + ", cluster specified: " + clusterIdSpecified);
                                    }
                                    throw new ResourceUnavailableException("Root volume is ready in different cluster, Deployment plan provided cannot be satisfied, unable to create a deployment for " + vm, Cluster.class, clusterIdSpecified);
                                }
                            }
                            plan = new DataCenterDeployment(planToDeploy.getDataCenterId(), planToDeploy.getPodId(), planToDeploy.getClusterId(), planToDeploy.getHostId(), vol.getPoolId(), null, ctx);
                        } else {
                            plan = new DataCenterDeployment(rootVolDcId, rootVolPodId, rootVolClusterId, null, vol.getPoolId(), null, ctx);
                            if (s_logger.isDebugEnabled()) {
                                s_logger.debug(vol + " is READY, changing deployment plan to use this pool's dcId: " + rootVolDcId + " , podId: " + rootVolPodId + " , and clusterId: " + rootVolClusterId);
                            }
                            planChangedByVolume = true;
                        }
                    }
                }
            }
            final VirtualMachineProfileImpl vmProfile = new VirtualMachineProfileImpl(vm, template, offering, owner, params);
            logBootModeParameters(params);
            DeployDestination dest = null;
            try {
                dest = _dpMgr.planDeployment(vmProfile, plan, avoids, planner);
            } catch (final AffinityConflictException e2) {
                s_logger.warn("Unable to create deployment, affinity rules associted to the VM conflict", e2);
                throw new CloudRuntimeException("Unable to create deployment, affinity rules associted to the VM conflict");
            }
            if (dest == null) {
                if (planChangedByVolume) {
                    plan = originalPlan;
                    planChangedByVolume = false;
                    reuseVolume = false;
                    continue;
                }
                throw new InsufficientServerCapacityException("Unable to create a deployment for " + vmProfile, DataCenter.class, plan.getDataCenterId(), areAffinityGroupsAssociated(vmProfile));
            }
            avoids.addHost(dest.getHost().getId());
            if (!template.isDeployAsIs()) {
                journal.record("Deployment found - Attempt #" + (StartRetry.value() - retry), vmProfile, dest);
            }
            long destHostId = dest.getHost().getId();
            vm.setPodIdToDeployIn(dest.getPod().getId());
            final Long cluster_id = dest.getCluster().getId();
            final ClusterDetailsVO cluster_detail_cpu = _clusterDetailsDao.findDetail(cluster_id, VmDetailConstants.CPU_OVER_COMMIT_RATIO);
            final ClusterDetailsVO cluster_detail_ram = _clusterDetailsDao.findDetail(cluster_id, VmDetailConstants.MEMORY_OVER_COMMIT_RATIO);
            if (userVmDetailsDao.findDetail(vm.getId(), VmDetailConstants.CPU_OVER_COMMIT_RATIO) == null && (Float.parseFloat(cluster_detail_cpu.getValue()) > 1f || Float.parseFloat(cluster_detail_ram.getValue()) > 1f)) {
                userVmDetailsDao.addDetail(vm.getId(), VmDetailConstants.CPU_OVER_COMMIT_RATIO, cluster_detail_cpu.getValue(), true);
                userVmDetailsDao.addDetail(vm.getId(), VmDetailConstants.MEMORY_OVER_COMMIT_RATIO, cluster_detail_ram.getValue(), true);
            } else if (userVmDetailsDao.findDetail(vm.getId(), VmDetailConstants.CPU_OVER_COMMIT_RATIO) != null) {
                userVmDetailsDao.addDetail(vm.getId(), VmDetailConstants.CPU_OVER_COMMIT_RATIO, cluster_detail_cpu.getValue(), true);
                userVmDetailsDao.addDetail(vm.getId(), VmDetailConstants.MEMORY_OVER_COMMIT_RATIO, cluster_detail_ram.getValue(), true);
            }
            vmProfile.setCpuOvercommitRatio(Float.parseFloat(cluster_detail_cpu.getValue()));
            vmProfile.setMemoryOvercommitRatio(Float.parseFloat(cluster_detail_ram.getValue()));
            StartAnswer startAnswer = null;
            try {
                if (!changeState(vm, Event.OperationRetry, destHostId, work, Step.Prepare)) {
                    throw new ConcurrentOperationException("Unable to update the state of the Virtual Machine " + vm.getUuid() + " oldstate: " + vm.getState() + "Event :" + Event.OperationRetry);
                }
            } catch (final NoTransitionException e1) {
                throw new ConcurrentOperationException(e1.getMessage());
            }
            try {
                resetVmNicsDeviceId(vm.getId());
                _networkMgr.prepare(vmProfile, dest, ctx);
                if (vm.getHypervisorType() != HypervisorType.BareMetal) {
                    volumeMgr.prepare(vmProfile, dest);
                }
                if (!reuseVolume) {
                    reuseVolume = true;
                }
                vmGuru.finalizeVirtualMachineProfile(vmProfile, dest, ctx);
                final VirtualMachineTO vmTO = hvGuru.implement(vmProfile);
                checkAndSetEnterSetupMode(vmTO, params);
                handlePath(vmTO.getDisks(), vm.getHypervisorType());
                Commands cmds = new Commands(Command.OnError.Stop);
                cmds.addCommand(new StartCommand(vmTO, dest.getHost(), getExecuteInSequence(vm.getHypervisorType())));
                vmGuru.finalizeDeployment(cmds, vmProfile, dest, ctx);
                addExtraConfig(vmTO);
                work = _workDao.findById(work.getId());
                if (work == null || work.getStep() != Step.Prepare) {
                    throw new ConcurrentOperationException("Work steps have been changed: " + work);
                }
                _workDao.updateStep(work, Step.Starting);
                _agentMgr.send(destHostId, cmds);
                _workDao.updateStep(work, Step.Started);
                startAnswer = cmds.getAnswer(StartAnswer.class);
                if (startAnswer != null && startAnswer.getResult()) {
                    handlePath(vmTO.getDisks(), startAnswer.getIqnToData());
                    final String host_guid = startAnswer.getHost_guid();
                    if (host_guid != null) {
                        final HostVO finalHost = _resourceMgr.findHostByGuid(host_guid);
                        if (finalHost == null) {
                            throw new CloudRuntimeException("Host Guid " + host_guid + " doesn't exist in DB, something went wrong while processing start answer: " + startAnswer);
                        }
                        destHostId = finalHost.getId();
                    }
                    if (vmGuru.finalizeStart(vmProfile, destHostId, cmds, ctx)) {
                        syncDiskChainChange(startAnswer);
                        if (!changeState(vm, Event.OperationSucceeded, destHostId, work, Step.Done)) {
                            s_logger.error("Unable to transition to a new state. VM uuid: " + vm.getUuid() + "VM oldstate:" + vm.getState() + "Event:" + Event.OperationSucceeded);
                            throw new ConcurrentOperationException("Failed to deploy VM" + vm.getUuid());
                        }
                        final GPUDeviceTO gpuDevice = startAnswer.getVirtualMachine().getGpuDevice();
                        if (gpuDevice != null) {
                            _resourceMgr.updateGPUDetails(destHostId, gpuDevice.getGroupDetails());
                        }
                        if (userVmDetailsDao.findDetail(vm.getId(), VmDetailConstants.DEPLOY_VM) != null) {
                            userVmDetailsDao.removeDetail(vm.getId(), VmDetailConstants.DEPLOY_VM);
                        }
                        startedVm = vm;
                        if (s_logger.isDebugEnabled()) {
                            s_logger.debug("Start completed for VM " + vm);
                        }
                        final Host vmHost = _hostDao.findById(destHostId);
                        if (vmHost != null && (VirtualMachine.Type.ConsoleProxy.equals(vm.getType()) || VirtualMachine.Type.SecondaryStorageVm.equals(vm.getType())) && caManager.canProvisionCertificates()) {
                            final Map<String, String> sshAccessDetails = _networkMgr.getSystemVMAccessDetails(vm);
                            for (int retries = 3; retries > 0; retries--) {
                                try {
                                    setupAgentSecurity(vmHost, sshAccessDetails, vm);
                                    return;
                                } catch (final AgentUnavailableException | OperationTimedoutException e) {
                                    s_logger.error("Retrying after catching exception while trying to secure agent for systemvm id=" + vm.getId(), e);
                                }
                            }
                            throw new CloudRuntimeException("Failed to setup and secure agent for systemvm id=" + vm.getId());
                        }
                        return;
                    } else {
                        if (s_logger.isDebugEnabled()) {
                            s_logger.info("The guru did not like the answers so stopping " + vm);
                        }
                        StopCommand stopCmd = new StopCommand(vm, getExecuteInSequence(vm.getHypervisorType()), false);
                        stopCmd.setControlIp(getControlNicIpForVM(vm));
                        Map<String, Boolean> vlanToPersistenceMap = getVlanToPersistenceMapForVM(vm.getId());
                        if (MapUtils.isNotEmpty(vlanToPersistenceMap)) {
                            stopCmd.setVlanToPersistenceMap(vlanToPersistenceMap);
                        }
                        final StopCommand cmd = stopCmd;
                        final Answer answer = _agentMgr.easySend(destHostId, cmd);
                        if (answer != null && answer instanceof StopAnswer) {
                            final StopAnswer stopAns = (StopAnswer) answer;
                            if (vm.getType() == VirtualMachine.Type.User) {
                                final String platform = stopAns.getPlatform();
                                if (platform != null) {
                                    final Map<String, String> vmmetadata = new HashMap<>();
                                    vmmetadata.put(vm.getInstanceName(), platform);
                                    syncVMMetaData(vmmetadata);
                                }
                            }
                        }
                        if (answer == null || !answer.getResult()) {
                            s_logger.warn("Unable to stop " + vm + " due to " + (answer != null ? answer.getDetails() : "no answers"));
                            _haMgr.scheduleStop(vm, destHostId, WorkType.ForceStop);
                            throw new ExecutionException("Unable to stop this VM, " + vm.getUuid() + " so we are unable to retry the start operation");
                        }
                        throw new ExecutionException("Unable to start  VM:" + vm.getUuid() + " due to error in finalizeStart, not retrying");
                    }
                }
                s_logger.info("Unable to start VM on " + dest.getHost() + " due to " + (startAnswer == null ? " no start answer" : startAnswer.getDetails()));
                if (startAnswer != null && startAnswer.getContextParam("stopRetry") != null) {
                    break;
                }
            } catch (OperationTimedoutException e) {
                s_logger.debug("Unable to send the start command to host " + dest.getHost() + " failed to start VM: " + vm.getUuid());
                if (e.isActive()) {
                    _haMgr.scheduleStop(vm, destHostId, WorkType.CheckStop);
                }
                canRetry = false;
                throw new AgentUnavailableException("Unable to start " + vm.getHostName(), destHostId, e);
            } catch (final ResourceUnavailableException e) {
                s_logger.warn("Unable to contact resource.", e);
                if (!avoids.add(e)) {
                    if (e.getScope() == Volume.class || e.getScope() == Nic.class) {
                        throw e;
                    } else {
                        s_logger.warn("unexpected ResourceUnavailableException : " + e.getScope().getName(), e);
                        throw e;
                    }
                }
            } catch (final InsufficientCapacityException e) {
                s_logger.warn("Insufficient capacity ", e);
                if (!avoids.add(e)) {
                    if (e.getScope() == Volume.class || e.getScope() == Nic.class) {
                        throw e;
                    } else {
                        s_logger.warn("unexpected InsufficientCapacityException : " + e.getScope().getName(), e);
                    }
                }
            } catch (ExecutionException | NoTransitionException e) {
                s_logger.error("Failed to start instance " + vm, e);
                throw new AgentUnavailableException("Unable to start instance due to " + e.getMessage(), destHostId, e);
            } catch (final StorageAccessException e) {
                s_logger.warn("Unable to access storage on host", e);
            } finally {
                if (startedVm == null && canRetry) {
                    final Step prevStep = work.getStep();
                    _workDao.updateStep(work, Step.Release);
                    if ((prevStep == Step.Started || prevStep == Step.Starting) && startAnswer != null && startAnswer.getResult()) {
                        cleanup(vmGuru, vmProfile, work, Event.OperationFailed, false);
                    } else {
                        cleanup(vmGuru, vmProfile, work, Event.OperationFailed, true);
                    }
                }
            }
        }
    } finally {
        if (startedVm == null) {
            if (VirtualMachine.Type.User.equals(vm.type) && ResourceCountRunningVMsonly.value()) {
                resourceCountDecrement(owner.getAccountId(), new Long(offering.getCpu()), new Long(offering.getRamSize()));
            }
            if (canRetry) {
                try {
                    changeState(vm, Event.OperationFailed, null, work, Step.Done);
                } catch (final NoTransitionException e) {
                    throw new ConcurrentOperationException(e.getMessage());
                }
            }
        }
        if (planToDeploy != null) {
            planToDeploy.setAvoids(avoids);
        }
    }
    if (startedVm == null) {
        throw new CloudRuntimeException("Unable to start instance '" + vm.getHostName() + "' (" + vm.getUuid() + "), see management server log for details");
    }
}

Example 20 with DataCenterDeployment

use of com.cloud.deploy.DataCenterDeployment in project cloudstack by apache.

the class VirtualMachineManagerImpl method prepareVmStorageMigration.

private Map<Volume, StoragePool> prepareVmStorageMigration(VMInstanceVO vm, Map<Long, Long> volumeToPool) {
    Map<Volume, StoragePool> volumeToPoolMap = new HashMap<>();
    if (MapUtils.isEmpty(volumeToPool)) {
        throw new CloudRuntimeException(String.format("Unable to migrate %s: missing volume to pool mapping.", vm.toString()));
    }
    Cluster cluster = null;
    Long dataCenterId = null;
    for (Map.Entry<Long, Long> entry : volumeToPool.entrySet()) {
        StoragePool pool = _storagePoolDao.findById(entry.getValue());
        if (pool.getClusterId() != null) {
            cluster = _clusterDao.findById(pool.getClusterId());
            break;
        }
        dataCenterId = pool.getDataCenterId();
    }
    Long podId = null;
    Long clusterId = null;
    if (cluster != null) {
        dataCenterId = cluster.getDataCenterId();
        podId = cluster.getPodId();
        clusterId = cluster.getId();
    }
    if (dataCenterId == null) {
        String msg = "Unable to migrate vm: failed to create deployment destination with given volume to pool map";
        s_logger.debug(msg);
        throw new CloudRuntimeException(msg);
    }
    final DataCenterDeployment destination = new DataCenterDeployment(dataCenterId, podId, clusterId, null, null, null);
    // Create a map of which volume should go in which storage pool.
    final VirtualMachineProfile profile = new VirtualMachineProfileImpl(vm);
    volumeToPoolMap = createMappingVolumeAndStoragePool(profile, destination, volumeToPool);
    try {
        stateTransitTo(vm, Event.StorageMigrationRequested, null);
    } catch (final NoTransitionException e) {
        String msg = String.format("Unable to migrate vm: %s", vm.getUuid());
        s_logger.warn(msg, e);
        throw new CloudRuntimeException(msg, e);
    }
    return volumeToPoolMap;
}