Examples with MastershipRole org.onosproject.net.MastershipRole used on opensource projects

Example 6 with MastershipRole

use of org.onosproject.net.MastershipRole in project onos by opennetworkinglab.

the class DeviceManager method handleMastershipEvent.

private void handleMastershipEvent(MastershipEvent event) {
    log.debug("Handling mastership event");
    final DeviceId did = event.subject();
    // myNextRole suggested by MastershipService event
    MastershipRole myNextRole;
    if (event.type() == MastershipEvent.Type.SUSPENDED) {
        // FIXME STANDBY OR NONE?
        myNextRole = NONE;
    } else if (localNodeId.equals(event.roleInfo().master())) {
        // confirm latest info
        MastershipTerm term = termService.getMastershipTerm(did);
        final boolean iHaveControl = term != null && localNodeId.equals(term.master());
        if (iHaveControl) {
            myNextRole = MASTER;
        } else {
            myNextRole = STANDBY;
        }
    } else if (event.roleInfo().backups().contains(localNodeId)) {
        myNextRole = STANDBY;
    } else {
        myNextRole = NONE;
    }
    log.debug("Device {} local status is {}", did, localStatus(did));
    final boolean isGracePeriodOn = inGracePeriod(did);
    final boolean isReachable = isReachable(did, isGracePeriodOn);
    // Passed the grace period and it is still not reachable
    if (!isGracePeriodOn && !isReachable) {
        // device is not connected to this node, nevertheless we should get a role
        if (mastershipService.getLocalRole(did) == NONE) {
            log.debug("Node was instructed to be {} role for {}, " + "but this node cannot reach the device " + "and role is already None. Asking a new role " + "and then apply the disconnection protocol.", myNextRole, did);
            try {
                mastershipService.requestRoleFor(did).get();
            } catch (InterruptedException e) {
                Thread.currentThread().interrupt();
                log.error("Interrupted waiting for Mastership", e);
            } catch (ExecutionException e) {
                log.error("Encountered an error waiting for Mastership", e);
            }
        } else if (myNextRole != NONE) {
            log.warn("Node was instructed to be {} role for {}, " + "but this node cannot reach the device. " + "Apply the disconnection protocol.", myNextRole, did);
        }
        // Let's put some order in the candidates list
        roleToAcknowledge.remove(did);
        updateMastershipFor(did);
    } else if (isReachable) {
        // cost us a lot as it is equivalent to a probe.
        if (store.getDevice(did) != null) {
            log.info("{} is reachable - reasserting the role", did);
            reassertRole(did, myNextRole);
        } else {
            log.debug("Device is not yet/no longer in the store: {}", did);
        }
    } else {
        // Do not proceed furthermore if the grace period is still on
        log.debug("Skipping mastership event {}", event);
    }
}

Example 7 with MastershipRole

use of org.onosproject.net.MastershipRole in project onos by opennetworkinglab.

the class DeviceManager method updateMastershipFor.

/**
 * Update the mastership for this device. If there is a node able
 * to reach the device and this node is the master move the
 * mastership to the next node still connected to this device.
 * If the current node is a backup, it demotes itself to the bottom
 * of the candidates list
 *
 * @param deviceId the device for which we have to update the mastership
 * @return the NodeId of any node that can reach the device, or null if
 * none of the ONOS instances can reach the device
 */
private NodeId updateMastershipFor(DeviceId deviceId) {
    Map<NodeId, CompletableFuture<Boolean>> probes = Maps.newHashMap();
    // Request a probe only if the node is ready
    for (ControllerNode onosNode : clusterService.getNodes()) {
        if (!clusterService.getState(onosNode.id()).isReady() || localNodeId.equals(onosNode.id())) {
            continue;
        }
        probes.put(onosNode.id(), communicationService.sendAndReceive(deviceId, PROBE_SUBJECT, SERIALIZER::encode, SERIALIZER::decode, onosNode.id()));
    }
    // Returns the first node able to reach the device
    // FIXME [SDFAB-935] optimize by looking at the MastershipInfo
    boolean isReachable;
    NodeId nextMaster = null;
    // FIXME Should we expose timeout? Understand if there is need to signal to the caller
    for (Map.Entry<NodeId, CompletableFuture<Boolean>> probe : probes.entrySet()) {
        isReachable = Tools.futureGetOrElse(probe.getValue(), PROBE_TIMEOUT_MILLIS, TimeUnit.MILLISECONDS, Boolean.FALSE);
        if (isReachable) {
            nextMaster = probe.getKey();
        }
    }
    // FIXME [SDFAB-935] optimize demote by looking at the MastershipInfo;
    if (nextMaster != null) {
        log.info("Device {} is still connected to {}", deviceId, nextMaster);
        MastershipRole myRole = mastershipService.getLocalRole(deviceId);
        if (myRole == MASTER) {
            log.info("Handing over the mastership of {} to next master {}", deviceId, nextMaster);
            mastershipAdminService.setRole(nextMaster, deviceId, MASTER);
        // Do not demote here because setRole can return before the mastership has been passed.
        // Current implementation promotes first the nextMaster as top of candidate list and then
        // transfer the leadership. We can use the BACKUP events to do demote or leverage periodic
        // checks.
        } else if (myRole == STANDBY) {
            log.info("Demote current instance to the bottom of the candidates list for {}", deviceId);
            mastershipAdminService.demote(localNodeId, deviceId);
        } else {
            log.debug("No valid role for {}", deviceId);
        }
    }
    return nextMaster;
}

Example 8 with MastershipRole

use of org.onosproject.net.MastershipRole in project onos by opennetworkinglab.

the class SimpleMastershipStore method setStandby.

@Override
public synchronized CompletableFuture<MastershipEvent> setStandby(NodeId nodeId, DeviceId deviceId) {
    MastershipRole role = getRole(nodeId, deviceId);
    switch(role) {
        case MASTER:
            NodeId backup = reelect(deviceId, nodeId);
            if (backup == null) {
                // no master alternative
                masterMap.remove(deviceId);
                // TODO: Should there be new event type for no MASTER?
                return CompletableFuture.completedFuture(new MastershipEvent(MASTER_CHANGED, deviceId, getMastership(deviceId)));
            } else {
                NodeId prevMaster = masterMap.put(deviceId, backup);
                incrementTerm(deviceId);
                addToBackup(deviceId, prevMaster);
                return CompletableFuture.completedFuture(new MastershipEvent(MASTER_CHANGED, deviceId, getMastership(deviceId)));
            }
        case STANDBY:
        case NONE:
            boolean modified = addToBackup(deviceId, nodeId);
            if (modified) {
                return CompletableFuture.completedFuture(new MastershipEvent(BACKUPS_CHANGED, deviceId, getMastership(deviceId)));
            }
            break;
        default:
            log.warn("unknown Mastership Role {}", role);
    }
    return null;
}

Example 9 with MastershipRole

use of org.onosproject.net.MastershipRole in project onos by opennetworkinglab.

the class ConsistentDeviceMastershipStore method requestRole.

@Override
public CompletableFuture<MastershipRole> requestRole(DeviceId deviceId) {
    checkArgument(deviceId != null, DEVICE_ID_NULL);
    String leadershipTopic = createDeviceMastershipTopic(deviceId);
    Leadership leadership = leadershipService.runForLeadership(leadershipTopic);
    NodeId leader = leadership == null ? null : leadership.leaderNodeId();
    List<NodeId> candidates = leadership == null ? ImmutableList.of() : ImmutableList.copyOf(leadership.candidates());
    MastershipRole role = Objects.equals(localNodeId, leader) ? MastershipRole.MASTER : candidates.contains(localNodeId) ? MastershipRole.STANDBY : MastershipRole.NONE;
    return CompletableFuture.completedFuture(role);
}

Example 10 with MastershipRole

use of org.onosproject.net.MastershipRole in project onos by opennetworkinglab.

the class DeviceRoleCommand method doExecute.

@Override
protected void doExecute() {
    MastershipAdminService service = get(MastershipAdminService.class);
    MastershipRole mastershipRole = MastershipRole.valueOf(role.toUpperCase());
    Futures.getUnchecked(service.setRole(new NodeId(node), deviceId(uri), mastershipRole));
}