public Long migrate(final HaWorkVO work) {
final long vmId = work.getInstanceId();
final VirtualMachineGuru<VMInstanceVO> mgr = findManager(work.getType());
VMInstanceVO vm = mgr.get(vmId);
if (vm == null || vm.getRemoved() != null) {
s_logger.debug("Unable to find the vm " + vmId);
return null;
}
s_logger.info("Migrating vm: " + vm.toString());
if (vm.getHostId() == null || vm.getHostId() != work.getHostId()) {
s_logger.info("VM is not longer running on the current hostId");
return null;
}
short alertType = AlertManager.ALERT_TYPE_USERVM_MIGRATE;
if (VirtualMachine.Type.DomainRouter.equals(vm.getType())) {
alertType = AlertManager.ALERT_TYPE_DOMAIN_ROUTER_MIGRATE;
} else if (VirtualMachine.Type.ConsoleProxy.equals(vm.getType())) {
alertType = AlertManager.ALERT_TYPE_CONSOLE_PROXY_MIGRATE;
}
HostVO fromHost = _hostDao.findById(vm.getHostId());
String fromHostName = ((fromHost == null) ? "unknown" : fromHost.getName());
HostVO toHost = null;
if (work.getStep() == Step.Scheduled) {
if (vm.getState() != State.Running) {
s_logger.info(
"VM's state is not ready for migration. "
+ vm.toString()
+ " State is "
+ vm.getState().toString());
return (System.currentTimeMillis() >> 10) + _migrateRetryInterval;
}
DataCenterVO dcVO = _dcDao.findById(fromHost.getDataCenterId());
HostPodVO podVO = _podDao.findById(fromHost.getPodId());
try {
toHost = mgr.prepareForMigration(vm);
if (toHost == null) {
if (s_logger.isDebugEnabled()) {
s_logger.debug("Unable to find a host for migrating vm " + vmId);
}
_alertMgr.sendAlert(
alertType,
vm.getDataCenterId(),
vm.getPodId(),
"Unable to migrate vm "
+ vm.getName()
+ " from host "
+ fromHostName
+ " in zone "
+ dcVO.getName()
+ " and pod "
+ podVO.getName(),
"Unable to find a suitable host");
}
} catch (final InsufficientCapacityException e) {
s_logger.warn("Unable to mgirate due to insufficient capacity " + vm.toString());
_alertMgr.sendAlert(
alertType,
vm.getDataCenterId(),
vm.getPodId(),
"Unable to migrate vm "
+ vm.getName()
+ " from host "
+ fromHostName
+ " in zone "
+ dcVO.getName()
+ " and pod "
+ podVO.getName(),
"Insufficient capacity");
} catch (final StorageUnavailableException e) {
s_logger.warn("Storage is unavailable: " + vm.toString());
_alertMgr.sendAlert(
alertType,
vm.getDataCenterId(),
vm.getPodId(),
"Unable to migrate vm "
+ vm.getName()
+ " from host "
+ fromHostName
+ " in zone "
+ dcVO.getName()
+ " and pod "
+ podVO.getName(),
"Storage is gone.");
}
if (toHost == null) {
_agentMgr.maintenanceFailed(vm.getHostId());
return null;
}
if (s_logger.isDebugEnabled()) {
s_logger.debug("Migrating from " + work.getHostId() + " to " + toHost.getId());
}
work.setStep(Step.Migrating);
work.setHostId(toHost.getId());
_haDao.update(work.getId(), work);
}
if (work.getStep() == Step.Migrating) {
vm = mgr.get(vmId); // let's see if anything has changed.
boolean migrated = false;
if (vm == null
|| vm.getRemoved() != null
|| vm.getHostId() == null
|| !_itMgr.stateTransitTo(vm, Event.MigrationRequested, vm.getHostId())) {
s_logger.info("Migration cancelled because state has changed: " + vm.toString());
} else {
try {
boolean isWindows =
_guestOSCategoryDao
.findById(_guestOSDao.findById(vm.getGuestOSId()).getCategoryId())
.getName()
.equalsIgnoreCase("Windows");
MigrateCommand cmd =
new MigrateCommand(vm.getInstanceName(), toHost.getPrivateIpAddress(), isWindows);
Answer answer = _agentMgr.send(fromHost.getId(), cmd);
if (answer != null && answer.getResult()) {
migrated = true;
_storageMgr.unshare(vm, fromHost);
work.setStep(Step.Investigating);
_haDao.update(work.getId(), work);
}
} catch (final AgentUnavailableException e) {
s_logger.debug("host became unavailable");
} catch (final OperationTimedoutException e) {
s_logger.debug("operation timed out");
if (e.isActive()) {
scheduleRestart(vm, true);
}
}
}
if (!migrated) {
s_logger.info("Migration was unsuccessful. Cleaning up: " + vm.toString());
DataCenterVO dcVO = _dcDao.findById(vm.getDataCenterId());
HostPodVO podVO = _podDao.findById(vm.getPodId());
_alertMgr.sendAlert(
alertType,
fromHost.getDataCenterId(),
fromHost.getPodId(),
"Unable to migrate vm "
+ vm.getName()
+ " from host "
+ fromHost.getName()
+ " in zone "
+ dcVO.getName()
+ " and pod "
+ podVO.getName(),
"Migrate Command failed. Please check logs.");
_itMgr.stateTransitTo(vm, Event.MigrationFailedOnSource, toHost.getId());
_agentMgr.maintenanceFailed(vm.getHostId());
Command cleanup = mgr.cleanup(vm, null);
_agentMgr.easySend(toHost.getId(), cleanup);
_storageMgr.unshare(vm, toHost);
return null;
}
}
if (toHost == null) {
toHost = _hostDao.findById(work.getHostId());
}
DataCenterVO dcVO = _dcDao.findById(toHost.getDataCenterId());
HostPodVO podVO = _podDao.findById(toHost.getPodId());
try {
if (!mgr.completeMigration(vm, toHost)) {
_alertMgr.sendAlert(
alertType,
toHost.getDataCenterId(),
toHost.getPodId(),
"Unable to migrate "
+ vmId
+ " to host "
+ toHost.getName()
+ " in zone "
+ dcVO.getName()
+ " and pod "
+ podVO.getName(),
"Migration not completed");
s_logger.warn("Unable to complete migration: " + vm.toString());
} else {
s_logger.info("Migration is complete: " + vm.toString());
}
return null;
} catch (final AgentUnavailableException e) {
s_logger.warn("Agent is unavailable for " + vm.toString());
} catch (final OperationTimedoutException e) {
s_logger.warn("Operation timed outfor " + vm.toString());
}
_itMgr.stateTransitTo(vm, Event.MigrationFailedOnDest, toHost.getId());
return (System.currentTimeMillis() >> 10) + _migrateRetryInterval;
}
