Examples with NoTransitionException com.cloud.utils.fsm.NoTransitionException used on opensource projects

Example 31 with NoTransitionException

use of com.cloud.utils.fsm.NoTransitionException in project cloudstack by apache.

the class AgentManagerImpl method handleDisconnectWithInvestigation.

protected boolean handleDisconnectWithInvestigation(final AgentAttache attache, Status.Event event) {
    final long hostId = attache.getId();
    HostVO host = _hostDao.findById(hostId);
    if (host != null) {
        Status nextStatus = null;
        try {
            nextStatus = host.getStatus().getNextStatus(event);
        } catch (final NoTransitionException ne) {
            /*
                 * Agent may be currently in status of Down, Alert, Removed, namely there is no next status for some events. Why this can happen? Ask God not me. I hate there was
                 * no piece of comment for code handling race condition. God knew what race condition the code dealt with!
                 */
            s_logger.debug("Caught exception while getting agent's next status", ne);
        }
        if (nextStatus == Status.Alert) {
            /* OK, we are going to the bad status, let's see what happened */
            s_logger.info("Investigating why host " + hostId + " has disconnected with event " + event);
            Status determinedState = investigate(attache);
            // if state cannot be determined do nothing and bail out
            if (determinedState == null) {
                if ((System.currentTimeMillis() >> 10) - host.getLastPinged() > AlertWait.value()) {
                    s_logger.warn("Agent " + hostId + " state cannot be determined for more than " + AlertWait + "(" + AlertWait.value() + ") seconds, will go to Alert state");
                    determinedState = Status.Alert;
                } else {
                    s_logger.warn("Agent " + hostId + " state cannot be determined, do nothing");
                    return false;
                }
            }
            final Status currentStatus = host.getStatus();
            s_logger.info("The agent from host " + hostId + " state determined is " + determinedState);
            if (determinedState == Status.Down) {
                final String message = "Host is down: " + host.getId() + "-" + host.getName() + ". Starting HA on the VMs";
                s_logger.error(message);
                if (host.getType() != Host.Type.SecondaryStorage && host.getType() != Host.Type.ConsoleProxy) {
                    _alertMgr.sendAlert(AlertManager.AlertType.ALERT_TYPE_HOST, host.getDataCenterId(), host.getPodId(), "Host down, " + host.getId(), message);
                }
                event = Status.Event.HostDown;
            } else if (determinedState == Status.Up) {
                /* Got ping response from host, bring it back */
                s_logger.info("Agent is determined to be up and running");
                agentStatusTransitTo(host, Status.Event.Ping, _nodeId);
                return false;
            } else if (determinedState == Status.Disconnected) {
                s_logger.warn("Agent is disconnected but the host is still up: " + host.getId() + "-" + host.getName());
                if (currentStatus == Status.Disconnected) {
                    if ((System.currentTimeMillis() >> 10) - host.getLastPinged() > AlertWait.value()) {
                        s_logger.warn("Host " + host.getId() + " has been disconnected past the wait time it should be disconnected.");
                        event = Status.Event.WaitedTooLong;
                    } else {
                        s_logger.debug("Host " + host.getId() + " has been determined to be disconnected but it hasn't passed the wait time yet.");
                        return false;
                    }
                } else if (currentStatus == Status.Up) {
                    final DataCenterVO dcVO = _dcDao.findById(host.getDataCenterId());
                    final HostPodVO podVO = _podDao.findById(host.getPodId());
                    final String hostDesc = "name: " + host.getName() + " (id:" + host.getId() + "), availability zone: " + dcVO.getName() + ", pod: " + podVO.getName();
                    if (host.getType() != Host.Type.SecondaryStorage && host.getType() != Host.Type.ConsoleProxy) {
                        _alertMgr.sendAlert(AlertManager.AlertType.ALERT_TYPE_HOST, host.getDataCenterId(), host.getPodId(), "Host disconnected, " + hostDesc, "If the agent for host [" + hostDesc + "] is not restarted within " + AlertWait + " seconds, host will go to Alert state");
                    }
                    event = Status.Event.AgentDisconnected;
                }
            } else {
                // if we end up here we are in alert state, send an alert
                final DataCenterVO dcVO = _dcDao.findById(host.getDataCenterId());
                final HostPodVO podVO = _podDao.findById(host.getPodId());
                final String podName = podVO != null ? podVO.getName() : "NO POD";
                final String hostDesc = "name: " + host.getName() + " (id:" + host.getId() + "), availability zone: " + dcVO.getName() + ", pod: " + podName;
                _alertMgr.sendAlert(AlertManager.AlertType.ALERT_TYPE_HOST, host.getDataCenterId(), host.getPodId(), "Host in ALERT state, " + hostDesc, "In availability zone " + host.getDataCenterId() + ", host is in alert state: " + host.getId() + "-" + host.getName());
            }
        } else {
            s_logger.debug("The next status of agent " + host.getId() + " is not Alert, no need to investigate what happened");
        }
    }
    handleDisconnectWithoutInvestigation(attache, event, true, true);
    // Maybe the host magically reappeared?
    host = _hostDao.findById(hostId);
    if (host != null && host.getStatus() == Status.Down) {
        _haMgr.scheduleRestartForVmsOnHost(host, true);
    }
    return true;
}

Example 32 with NoTransitionException

use of com.cloud.utils.fsm.NoTransitionException in project cloudstack by apache.

the class XenserverSnapshotStrategy method backupSnapshot.

@Override
public SnapshotInfo backupSnapshot(SnapshotInfo snapshot) {
    SnapshotInfo parentSnapshot = snapshot.getParent();
    if (parentSnapshot != null && snapshot.getPath().equalsIgnoreCase(parentSnapshot.getPath())) {
        s_logger.debug("backup an empty snapshot");
        // don't need to backup this snapshot
        SnapshotDataStoreVO parentSnapshotOnBackupStore = snapshotStoreDao.findBySnapshot(parentSnapshot.getId(), DataStoreRole.Image);
        if (parentSnapshotOnBackupStore != null && parentSnapshotOnBackupStore.getState() == State.Ready) {
            DataStore store = dataStoreMgr.getDataStore(parentSnapshotOnBackupStore.getDataStoreId(), parentSnapshotOnBackupStore.getRole());
            SnapshotInfo snapshotOnImageStore = (SnapshotInfo) store.create(snapshot);
            snapshotOnImageStore.processEvent(Event.CreateOnlyRequested);
            SnapshotObjectTO snapTO = new SnapshotObjectTO();
            snapTO.setPath(parentSnapshotOnBackupStore.getInstallPath());
            CreateObjectAnswer createSnapshotAnswer = new CreateObjectAnswer(snapTO);
            snapshotOnImageStore.processEvent(Event.OperationSuccessed, createSnapshotAnswer);
            SnapshotObject snapObj = (SnapshotObject) snapshot;
            try {
                snapObj.processEvent(Snapshot.Event.OperationNotPerformed);
            } catch (NoTransitionException e) {
                s_logger.debug("Failed to change state: " + snapshot.getId() + ": " + e.toString());
                throw new CloudRuntimeException(e.toString());
            }
            return snapshotDataFactory.getSnapshot(snapObj.getId(), store);
        } else {
            s_logger.debug("parent snapshot hasn't been backed up yet");
        }
    }
    // determine full snapshot backup or not
    boolean fullBackup = true;
    SnapshotDataStoreVO parentSnapshotOnBackupStore = snapshotStoreDao.findLatestSnapshotForVolume(snapshot.getVolumeId(), DataStoreRole.Image);
    SnapshotDataStoreVO parentSnapshotOnPrimaryStore = snapshotStoreDao.findLatestSnapshotForVolume(snapshot.getVolumeId(), DataStoreRole.Primary);
    HypervisorType hypervisorType = snapshot.getBaseVolume().getHypervisorType();
    if (parentSnapshotOnPrimaryStore != null && parentSnapshotOnBackupStore != null && hypervisorType == Hypervisor.HypervisorType.XenServer) {
        // CS does incremental backup only for XenServer
        // In case of volume migration from one pool to other pool, CS should take full snapshot to avoid any issues with delta chain,
        // to check if this is a migrated volume, compare the current pool id of volume and store_id of oldest snapshot on primary for this volume.
        // Why oldest? Because at this point CS has two snapshot on primary entries for same volume, one with old pool_id and other one with
        // current pool id. So, verify and if volume found to be migrated, delete snapshot entry with previous pool store_id.
        SnapshotDataStoreVO oldestSnapshotOnPrimary = snapshotStoreDao.findOldestSnapshotForVolume(snapshot.getVolumeId(), DataStoreRole.Primary);
        VolumeVO volume = volumeDao.findById(snapshot.getVolumeId());
        if (oldestSnapshotOnPrimary != null) {
            if (oldestSnapshotOnPrimary.getDataStoreId() == volume.getPoolId() && oldestSnapshotOnPrimary.getId() != parentSnapshotOnPrimaryStore.getId()) {
                int _deltaSnapshotMax = NumbersUtil.parseInt(configDao.getValue("snapshot.delta.max"), SnapshotManager.DELTAMAX);
                int deltaSnap = _deltaSnapshotMax;
                int i;
                for (i = 1; i < deltaSnap; i++) {
                    Long prevBackupId = parentSnapshotOnBackupStore.getParentSnapshotId();
                    if (prevBackupId == 0) {
                        break;
                    }
                    parentSnapshotOnBackupStore = snapshotStoreDao.findBySnapshot(prevBackupId, DataStoreRole.Image);
                    if (parentSnapshotOnBackupStore == null) {
                        break;
                    }
                }
                if (i >= deltaSnap) {
                    fullBackup = true;
                } else {
                    fullBackup = false;
                }
            } else if (oldestSnapshotOnPrimary.getId() != parentSnapshotOnPrimaryStore.getId()) {
                // if there is an snapshot entry for previousPool(primary storage) of migrated volume, delete it becasue CS created one more snapshot entry for current pool
                snapshotStoreDao.remove(oldestSnapshotOnPrimary.getId());
            }
        }
    }
    snapshot.addPayload(fullBackup);
    return snapshotSvr.backupSnapshot(snapshot);
}

Example 33 with NoTransitionException

use of com.cloud.utils.fsm.NoTransitionException in project cloudstack by apache.

the class DefaultVMSnapshotStrategy method takeVMSnapshot.

@Override
public VMSnapshot takeVMSnapshot(VMSnapshot vmSnapshot) {
    Long hostId = vmSnapshotHelper.pickRunningHost(vmSnapshot.getVmId());
    UserVm userVm = userVmDao.findById(vmSnapshot.getVmId());
    VMSnapshotVO vmSnapshotVO = (VMSnapshotVO) vmSnapshot;
    try {
        vmSnapshotHelper.vmSnapshotStateTransitTo(vmSnapshotVO, VMSnapshot.Event.CreateRequested);
    } catch (NoTransitionException e) {
        throw new CloudRuntimeException(e.getMessage());
    }
    CreateVMSnapshotAnswer answer = null;
    boolean result = false;
    try {
        GuestOSVO guestOS = guestOSDao.findById(userVm.getGuestOSId());
        List<VolumeObjectTO> volumeTOs = vmSnapshotHelper.getVolumeTOList(userVm.getId());
        VMSnapshotTO current = null;
        VMSnapshotVO currentSnapshot = vmSnapshotDao.findCurrentSnapshotByVmId(userVm.getId());
        if (currentSnapshot != null)
            current = vmSnapshotHelper.getSnapshotWithParents(currentSnapshot);
        VMSnapshotOptions options = ((VMSnapshotVO) vmSnapshot).getOptions();
        boolean quiescevm = true;
        if (options != null)
            quiescevm = options.needQuiesceVM();
        VMSnapshotTO target = new VMSnapshotTO(vmSnapshot.getId(), vmSnapshot.getName(), vmSnapshot.getType(), null, vmSnapshot.getDescription(), false, current, quiescevm);
        if (current == null)
            vmSnapshotVO.setParent(null);
        else
            vmSnapshotVO.setParent(current.getId());
        HostVO host = hostDao.findById(hostId);
        GuestOSHypervisorVO guestOsMapping = guestOsHypervisorDao.findByOsIdAndHypervisor(guestOS.getId(), host.getHypervisorType().toString(), host.getHypervisorVersion());
        CreateVMSnapshotCommand ccmd = new CreateVMSnapshotCommand(userVm.getInstanceName(), userVm.getUuid(), target, volumeTOs, guestOS.getDisplayName());
        if (guestOsMapping == null) {
            ccmd.setPlatformEmulator(null);
        } else {
            ccmd.setPlatformEmulator(guestOsMapping.getGuestOsName());
        }
        ccmd.setWait(_wait);
        answer = (CreateVMSnapshotAnswer) agentMgr.send(hostId, ccmd);
        if (answer != null && answer.getResult()) {
            processAnswer(vmSnapshotVO, userVm, answer, hostId);
            s_logger.debug("Create vm snapshot " + vmSnapshot.getName() + " succeeded for vm: " + userVm.getInstanceName());
            result = true;
            for (VolumeObjectTO volumeTo : answer.getVolumeTOs()) {
                publishUsageEvent(EventTypes.EVENT_VM_SNAPSHOT_CREATE, vmSnapshot, userVm, volumeTo);
            }
            return vmSnapshot;
        } else {
            String errMsg = "Creating VM snapshot: " + vmSnapshot.getName() + " failed";
            if (answer != null && answer.getDetails() != null)
                errMsg = errMsg + " due to " + answer.getDetails();
            s_logger.error(errMsg);
            throw new CloudRuntimeException(errMsg);
        }
    } catch (OperationTimedoutException e) {
        s_logger.debug("Creating VM snapshot: " + vmSnapshot.getName() + " failed: " + e.toString());
        throw new CloudRuntimeException("Creating VM snapshot: " + vmSnapshot.getName() + " failed: " + e.toString());
    } catch (AgentUnavailableException e) {
        s_logger.debug("Creating VM snapshot: " + vmSnapshot.getName() + " failed", e);
        throw new CloudRuntimeException("Creating VM snapshot: " + vmSnapshot.getName() + " failed: " + e.toString());
    } finally {
        if (!result) {
            try {
                vmSnapshotHelper.vmSnapshotStateTransitTo(vmSnapshot, VMSnapshot.Event.OperationFailed);
            } catch (NoTransitionException e1) {
                s_logger.error("Cannot set vm snapshot state due to: " + e1.getMessage());
            }
        }
    }
}

Example 34 with NoTransitionException

use of com.cloud.utils.fsm.NoTransitionException in project cloudstack by apache.

the class DefaultVMSnapshotStrategy method deleteVMSnapshot.

@Override
public boolean deleteVMSnapshot(VMSnapshot vmSnapshot) {
    UserVmVO userVm = userVmDao.findById(vmSnapshot.getVmId());
    VMSnapshotVO vmSnapshotVO = (VMSnapshotVO) vmSnapshot;
    try {
        vmSnapshotHelper.vmSnapshotStateTransitTo(vmSnapshot, VMSnapshot.Event.ExpungeRequested);
    } catch (NoTransitionException e) {
        s_logger.debug("Failed to change vm snapshot state with event ExpungeRequested");
        throw new CloudRuntimeException("Failed to change vm snapshot state with event ExpungeRequested: " + e.getMessage());
    }
    try {
        Long hostId = vmSnapshotHelper.pickRunningHost(vmSnapshot.getVmId());
        List<VolumeObjectTO> volumeTOs = vmSnapshotHelper.getVolumeTOList(vmSnapshot.getVmId());
        String vmInstanceName = userVm.getInstanceName();
        VMSnapshotTO parent = vmSnapshotHelper.getSnapshotWithParents(vmSnapshotVO).getParent();
        VMSnapshotTO vmSnapshotTO = new VMSnapshotTO(vmSnapshot.getId(), vmSnapshot.getName(), vmSnapshot.getType(), vmSnapshot.getCreated().getTime(), vmSnapshot.getDescription(), vmSnapshot.getCurrent(), parent, true);
        GuestOSVO guestOS = guestOSDao.findById(userVm.getGuestOSId());
        DeleteVMSnapshotCommand deleteSnapshotCommand = new DeleteVMSnapshotCommand(vmInstanceName, vmSnapshotTO, volumeTOs, guestOS.getDisplayName());
        Answer answer = agentMgr.send(hostId, deleteSnapshotCommand);
        if (answer != null && answer.getResult()) {
            DeleteVMSnapshotAnswer deleteVMSnapshotAnswer = (DeleteVMSnapshotAnswer) answer;
            processAnswer(vmSnapshotVO, userVm, answer, hostId);
            for (VolumeObjectTO volumeTo : deleteVMSnapshotAnswer.getVolumeTOs()) {
                publishUsageEvent(EventTypes.EVENT_VM_SNAPSHOT_DELETE, vmSnapshot, userVm, volumeTo);
            }
            return true;
        } else {
            String errMsg = (answer == null) ? null : answer.getDetails();
            s_logger.error("Delete vm snapshot " + vmSnapshot.getName() + " of vm " + userVm.getInstanceName() + " failed due to " + errMsg);
            throw new CloudRuntimeException("Delete vm snapshot " + vmSnapshot.getName() + " of vm " + userVm.getInstanceName() + " failed due to " + errMsg);
        }
    } catch (OperationTimedoutException e) {
        throw new CloudRuntimeException("Delete vm snapshot " + vmSnapshot.getName() + " of vm " + userVm.getInstanceName() + " failed due to " + e.getMessage());
    } catch (AgentUnavailableException e) {
        throw new CloudRuntimeException("Delete vm snapshot " + vmSnapshot.getName() + " of vm " + userVm.getInstanceName() + " failed due to " + e.getMessage());
    }
}

Example 35 with NoTransitionException

use of com.cloud.utils.fsm.NoTransitionException in project cloudstack by apache.

the class DataObjectManagerImpl method deleteAsync.

@Override
public void deleteAsync(DataObject data, AsyncCompletionCallback<CommandResult> callback) {
    try {
        objectInDataStoreMgr.update(data, Event.DestroyRequested);
    } catch (NoTransitionException e) {
        s_logger.debug("destroy failed", e);
        CreateCmdResult res = new CreateCmdResult(null, null);
        callback.complete(res);
    } catch (ConcurrentOperationException e) {
        s_logger.debug("destroy failed", e);
        CreateCmdResult res = new CreateCmdResult(null, null);
        callback.complete(res);
    }
    DeleteContext<CommandResult> context = new DeleteContext<CommandResult>(callback, data);
    AsyncCallbackDispatcher<DataObjectManagerImpl, CommandResult> caller = AsyncCallbackDispatcher.create(this);
    caller.setCallback(caller.getTarget().deleteAsynCallback(null, null)).setContext(context);
    data.getDataStore().getDriver().deleteAsync(data.getDataStore(), data, caller);
    return;
}