示例#1
0
    def _get_nodes_from_nodespec(self, sess: Session,
                                 nodespec: str) -> List[Node]:
        """
        Given a node spec, return the list of nodes matching the spec.

        :param Session sess: a database session
        :param str nodespec: a node spec

        :return List[Node]:  a list of nodes matching the spec

        """
        node_api = NodesDbHandler()
        nodes = node_api.expand_nodespec(sess,
                                         nodespec,
                                         include_installer=False)
        if not nodes:
            return []

        return nodes
示例#2
0
class NodeManager(TortugaObjectManager):     \
        # pylint: disable=too-many-public-methods

    def __init__(self):
        super(NodeManager, self).__init__()

        self._nodeDbApi = NodeDbApi()
        self._cm = ConfigManager()
        self._bhm = osUtility.getOsObjectFactory().getOsBootHostManager(
            self._cm)
        self._syncApi = SyncApi()
        self._nodesDbHandler = NodesDbHandler()
        self._addHostManager = AddHostManager()
        self._logger = logging.getLogger(NODE_NAMESPACE)

    def __validateHostName(self, hostname: str, name_format: str) -> None:
        """
        Raises:
            ConfigurationError
        """

        bWildcardNameFormat = (name_format == '*')

        if hostname and not bWildcardNameFormat:
            # Host name specified, but hardware profile does not
            # allow setting the host name
            raise ConfigurationError(
                'Hardware profile does not allow setting host names'
                ' of imported nodes')
        elif not hostname and bWildcardNameFormat:
            # Host name not specified but hardware profile expects it
            raise ConfigurationError(
                'Hardware profile requires host names to be set')

    def createNewNode(self,
                      session: Session,
                      addNodeRequest: dict,
                      dbHardwareProfile: HardwareProfileModel,
                      dbSoftwareProfile: Optional[SoftwareProfileModel] = None,
                      validateIp: bool = True,
                      bGenerateIp: bool = True,
                      dns_zone: Optional[str] = None) -> NodeModel:
        """
        Convert the addNodeRequest into a Nodes object

        Raises:
            NicNotFound
        """

        self._logger.debug(
            'createNewNode(): session=[%s], addNodeRequest=[%s],'
            ' dbHardwareProfile=[%s], dbSoftwareProfile=[%s],'
            ' validateIp=[%s], bGenerateIp=[%s]' %
            (id(session), addNodeRequest, dbHardwareProfile.name,
             dbSoftwareProfile.name if dbSoftwareProfile else '(none)',
             validateIp, bGenerateIp))

        hostname = addNodeRequest['name'] \
            if 'name' in addNodeRequest else None

        # Ensure no conflicting options (ie. specifying host name for
        # hardware profile in which host names are generated)
        self.__validateHostName(hostname, dbHardwareProfile.nameFormat)

        node = NodeModel(name=hostname)

        if 'rack' in addNodeRequest:
            node.rack = addNodeRequest['rack']

        node.addHostSession = addNodeRequest['addHostSession']

        # Complete initialization of new node record
        nic_defs = addNodeRequest['nics'] \
            if 'nics' in addNodeRequest else []

        AddHostServerLocal().initializeNode(session,
                                            node,
                                            dbHardwareProfile,
                                            dbSoftwareProfile,
                                            nic_defs,
                                            bValidateIp=validateIp,
                                            bGenerateIp=bGenerateIp,
                                            dns_zone=dns_zone)

        # Set hardware profile of new node
        node.hardwareprofile = dbHardwareProfile

        node.softwareprofile = dbSoftwareProfile

        # Return the new node
        return node

    def getNode(self, session: Session, name, optionDict: OptionDict = None) \
            -> Node:
        """
        Get node by name

        Raises:
            NodeNotFound
        """

        return self.__populate_nodes(session, [
            self._nodeDbApi.getNode(
                session, name, optionDict=get_default_relations(optionDict))
        ])[0]

    def getNodeById(self,
                    session: Session,
                    nodeId: int,
                    optionDict: OptionDict = None) -> Node:
        """
        Get node by node id

        Raises:
            NodeNotFound
        """

        return self.__populate_nodes(session, [
            self._nodeDbApi.getNodeById(
                session,
                int(nodeId),
                optionDict=get_default_relations(optionDict))
        ])[0]

    def getNodeByIp(self,
                    session: Session,
                    ip: str,
                    optionDict: Dict[str, bool] = None) -> Node:
        """
        Get node by IP address

        Raises:
            NodeNotFound
        """

        return self.__populate_nodes(session, [
            self._nodeDbApi.getNodeByIp(
                session, ip, optionDict=get_default_relations(optionDict))
        ])[0]

    def getNodeList(self,
                    session,
                    tags=None,
                    optionDict: Optional[OptionDict] = None) -> List[Node]:
        """
        Return all nodes

        """
        return self.__populate_nodes(
            session,
            self._nodeDbApi.getNodeList(
                session,
                tags=tags,
                optionDict=get_default_relations(optionDict)))

    def __populate_nodes(self, session: Session,
                         nodes: List[Node]) -> List[Node]:
        """
        Expand non-database fields in Node objects

        """
        class SoftwareProfileMetadataCache(defaultdict):
            def __missing__(self, key):
                metadata = \
                    SoftwareProfileManager().get_software_profile_metadata(
                        session, key
                    )

                self[key] = metadata

                return metadata

        swprofile_map = SoftwareProfileMetadataCache()

        for node in nodes:
            if not node.getSoftwareProfile():
                continue

            node.getSoftwareProfile().setMetadata(
                swprofile_map[node.getSoftwareProfile().getName()])

        return nodes

    def updateNode(self, session: Session, nodeName: str,
                   updateNodeRequest: dict) -> None:
        """
        Calls updateNode() method of resource adapter
        """

        self._logger.debug('updateNode(): name=[{0}]'.format(nodeName))

        try:
            node = self._nodesDbHandler.getNode(session, nodeName)

            if 'nics' in updateNodeRequest:
                nic = updateNodeRequest['nics'][0]

                if 'ip' in nic:
                    node.nics[0].ip = nic['ip']
                    node.nics[0].boot = True

            # Call resource adapter
            # self._nodesDbHandler.updateNode(session, node, updateNodeRequest)

            adapter = self.__getResourceAdapter(node.hardwareprofile)

            adapter.updateNode(session, node, updateNodeRequest)

            run_post_install = False

            #
            # Capture previous state and node data as dict for firing the
            # event later on
            #
            previous_state = node.state
            node_dict = Node.getFromDbDict(node.__dict__).getCleanDict()

            if 'state' in updateNodeRequest:
                run_post_install = \
                    node.state == state.NODE_STATE_ALLOCATED and \
                    updateNodeRequest['state'] == state.NODE_STATE_PROVISIONED

                node.state = updateNodeRequest['state']
                node_dict['state'] = updateNodeRequest['state']

            session.commit()

            #
            # If the node state has changed, then fire the node state changed
            # event
            #
            if node_dict['state'] != previous_state:
                NodeStateChanged.fire(node=node_dict,
                                      previous_state=previous_state)

            if run_post_install:
                self._logger.debug(
                    'updateNode(): run-post-install for node [{0}]'.format(
                        node.name))

                self.__scheduleUpdate()
        except Exception:
            session.rollback()

            raise

    def updateNodeStatus(self,
                         session: Session,
                         nodeName: str,
                         node_state: Optional[str] = None,
                         bootFrom: int = None):
        """Update node status

        If neither 'state' nor 'bootFrom' are not None, this operation will
        update only the 'lastUpdated' timestamp.

        Returns:
            bool indicating whether state and/or bootFrom differed from
            current value
        """

        value = 'None' if bootFrom is None else \
            '1 (disk)' if int(bootFrom) == 1 else '0 (network)'

        self._logger.debug(
            'updateNodeStatus(): node=[%s], node_state=[{%s}],'
            ' bootFrom=[{%s}]', nodeName, node_state, value)

        dbNode = self._nodesDbHandler.getNode(session, nodeName)

        #
        # Capture previous state and node data in dict form for the
        # event later on
        #
        previous_state = dbNode.state
        node_dict = Node.getFromDbDict(dbNode.__dict__).getCleanDict()

        # Bitfield representing node changes (0 = state change,
        # 1 = bootFrom # change)
        changed = 0

        if node_state is not None and node_state != dbNode.state:
            # 'state' changed
            changed |= 1

        if bootFrom is not None and bootFrom != dbNode.bootFrom:
            # 'bootFrom' changed
            changed |= 2

        if changed:
            # Create custom log message
            msg = 'Node [%s] state change:' % (dbNode.name)

            if changed & 1:
                msg += ' state: [%s] -> [%s]' % (dbNode.state, node_state)

                dbNode.state = node_state
                node_dict['state'] = node_state

            if changed & 2:
                msg += ' bootFrom: [%d] -> [%d]' % (dbNode.bootFrom, bootFrom)

                dbNode.bootFrom = bootFrom

            self._logger.info(msg)
        else:
            self._logger.info('Updated timestamp for node [%s]' %
                              (dbNode.name))

        dbNode.lastUpdate = time.strftime('%Y-%m-%d %H:%M:%S',
                                          time.localtime(time.time()))

        result = bool(changed)

        # Only change local boot configuration if the hardware profile is
        # not marked as 'remote' and we're not acting on the installer
        # node.
        if dbNode.softwareprofile and \
                dbNode.softwareprofile.type != 'installer' and \
                dbNode.hardwareprofile.location != 'remote':
            # update local boot configuration for on-premise nodes
            self._bhm.writePXEFile(session, dbNode, localboot=bootFrom)

        session.commit()

        #
        # If the node state has changed, fire the node state changed
        # event
        #
        if state and (previous_state != state):
            NodeStateChanged.fire(node=node_dict,
                                  previous_state=previous_state)

        return result

    def __process_nodeErrorDict(self, nodeErrorDict):
        result = {}
        nodes_deleted = []

        for key, nodeList in nodeErrorDict.items():
            result[key] = [dbNode.name for dbNode in nodeList]

            if key == 'NodesDeleted':
                for node in nodeList:
                    node_deleted = {
                        'name': node.name,
                        'hardwareprofile': node.hardwareprofile.name,
                        'addHostSession': node.addHostSession,
                    }

                    if node.softwareprofile:
                        node_deleted['softwareprofile'] = \
                            node.softwareprofile.name

                    nodes_deleted.append(node_deleted)

        return result, nodes_deleted

    def deleteNode(self, session, nodespec: str, force: bool = False):
        """
        Delete node by nodespec

        Raises:
            NodeNotFound
        """

        kitmgr = KitActionsManager()
        kitmgr.session = session

        try:
            nodes = self._nodesDbHandler.expand_nodespec(
                session, nodespec, include_installer=False)
            if not nodes:
                raise NodeNotFound('No nodes matching nodespec [%s]' %
                                   (nodespec))

            self.__validate_delete_nodes_request(nodes, force)

            self.__preDeleteHost(kitmgr, nodes)

            nodeErrorDict = self.__delete_node(session, nodes)

            # REALLY!?!? Convert a list of Nodes objects into a list of
            # node names so we can report the list back to the end-user.
            # This needs to be FIXED!

            result, nodes_deleted = self.__process_nodeErrorDict(nodeErrorDict)

            session.commit()

            # ============================================================
            # Perform actions *after* node deletion(s) have been committed
            # to database.
            # ============================================================

            self.__postDeleteHost(kitmgr, nodes_deleted)

            addHostSessions = set(
                [tmpnode['addHostSession'] for tmpnode in nodes_deleted])

            if addHostSessions:
                self._addHostManager.delete_sessions(addHostSessions)

            for nodeName in result['NodesDeleted']:
                # Remove the Puppet cert
                self._bhm.deletePuppetNodeCert(nodeName)

                self._bhm.nodeCleanup(nodeName)

                self._logger.info('Node [%s] deleted' % (nodeName))

            # Schedule a cluster update
            self.__scheduleUpdate()

            return result
        except Exception:
            session.rollback()

            raise

    def __validate_delete_nodes_request(self, nodes: List[NodeModel],
                                        force: bool):
        """
        Raises:
            DeleteNodeFailed
        """

        swprofile_distribution: Dict[SoftwareProfileModel, int] = {}

        for node in nodes:
            if node.softwareprofile not in swprofile_distribution:
                swprofile_distribution[node.softwareprofile] = 0

            swprofile_distribution[node.softwareprofile] += 1

        errors: List[str] = []

        for software_profile, num_nodes_deleted in \
                swprofile_distribution.items():
            if software_profile.lockedState == 'HardLocked':
                errors.append(
                    f'Nodes cannot be deleted from hard locked software'
                    ' profile [{software_profile.name}]')

                continue

            if software_profile.minNodes and \
                    len(software_profile.nodes) - num_nodes_deleted < \
                        software_profile.minNodes:
                if force and software_profile.lockedState == 'SoftLocked':
                    # allow deletion of nodes when force is set and profile
                    # is soft locked
                    continue

                # do not allow number of software profile nodes to drop
                # below configured minimum
                errors.append(
                    'Software profile [{}] requires minimum of {} nodes;'
                    ' denied request to delete {} node(s)'.format(
                        software_profile.name, software_profile.minNodes,
                        num_nodes_deleted))

                continue

            if software_profile.lockedState == 'SoftLocked' and not force:
                errors.append(
                    'Nodes cannot be deleted from soft locked software'
                    f' profile [{software_profile.name}]')

        if errors:
            raise OperationFailed('\n'.join(errors))

    def __delete_node(self, session: Session, dbNodes: List[NodeModel]) \
            -> Dict[str, List[NodeModel]]:
        """
        Raises:
            DeleteNodeFailed
        """

        result: Dict[str, list] = {
            'NodesDeleted': [],
            'DeleteNodeFailed': [],
            'SoftwareProfileLocked': [],
            'SoftwareProfileHardLocked': [],
        }

        nodes: Dict[HardwareProfileModel, List[NodeModel]] = {}
        events_to_fire: List[dict] = []

        #
        # Mark node states as deleted in the database
        #
        for dbNode in dbNodes:
            #
            # Capture previous state and node data as a dict for firing
            # the event later on
            #
            event_data = {
                'previous_state': dbNode.state,
                'node': Node.getFromDbDict(dbNode.__dict__).getCleanDict()
            }

            dbNode.state = state.NODE_STATE_DELETED
            event_data['node']['state'] = 'Deleted'

            if dbNode.hardwareprofile not in nodes:
                nodes[dbNode.hardwareprofile] = [dbNode]
            else:
                nodes[dbNode.hardwareprofile].append(dbNode)

        session.commit()

        #
        # Fire node state change events
        #
        for event in events_to_fire:
            NodeStateChanged.fire(node=event['node'],
                                  previous_state=event['previous_state'])

        #
        # Call resource adapter with batch(es) of node lists keyed on
        # hardware profile.
        #
        for hwprofile, hwprofile_nodes in nodes.items():
            # Get the ResourceAdapter
            adapter = self.__get_resource_adapter(session, hwprofile)

            # Call the resource adapter
            adapter.deleteNode(hwprofile_nodes)

            # Iterate over all nodes in hardware profile, completing the
            # delete operation.
            for dbNode in hwprofile_nodes:
                for tag in dbNode.tags:
                    if len(tag.nodes) == 1 and \
                            not tag.softwareprofiles and \
                            not tag.hardwareprofiles:
                        session.delete(tag)

                # Delete the Node
                self._logger.debug('Deleting node [%s]' % (dbNode.name))

                session.delete(dbNode)

                result['NodesDeleted'].append(dbNode)

        return result

    def __get_resource_adapter(self, session: Session,
                               hardwareProfile: HardwareProfileModel):
        """
        Raises:
            OperationFailed
        """

        if not hardwareProfile.resourceadapter:
            raise OperationFailed(
                'Hardware profile [%s] does not have an associated'
                ' resource adapter' % (hardwareProfile.name))

        adapter = resourceAdapterFactory.get_api(
            hardwareProfile.resourceadapter.name)

        adapter.session = session

        return adapter

    def __process_delete_node_result(self, nodeErrorDict):
        # REALLY!?!? Convert a list of Nodes objects into a list of
        # node names so we can report the list back to the end-user.
        # This needs to be FIXED!

        result = {}
        nodes_deleted = []

        for key, nodeList in nodeErrorDict.items():
            result[key] = [dbNode.name for dbNode in nodeList]

            if key == 'NodesDeleted':
                for node in nodeList:
                    node_deleted = {
                        'name': node.name,
                        'hardwareprofile': node.hardwareprofile.name,
                    }

                    if node.softwareprofile:
                        node_deleted['softwareprofile'] = \
                            node.softwareprofile.name

                    nodes_deleted.append(node_deleted)

        return result, nodes_deleted

    def __preDeleteHost(self, kitmgr: KitActionsManager, nodes):
        self._logger.debug('__preDeleteHost(): nodes=[%s]' %
                           (' '.join([node.name for node in nodes])))

        for node in nodes:
            kitmgr.pre_delete_host(
                node.hardwareprofile.name,
                node.softwareprofile.name if node.softwareprofile else None,
                nodes=[node.name])

    def __postDeleteHost(self, kitmgr, nodes_deleted):
        # 'nodes_deleted' is a list of dicts of the following format:
        #
        # {
        #     'name': 'compute-01',
        #     'softwareprofile': 'Compute',
        #     'hardwareprofile': 'LocalIron',
        # }
        #
        # if the node does not have an associated software profile, the
        # dict does not contain the key 'softwareprofile'.

        self._logger.debug('__postDeleteHost(): nodes_deleted=[%s]' %
                           (nodes_deleted))

        if not nodes_deleted:
            self._logger.debug('No nodes deleted in this operation')

            return

        for node_dict in nodes_deleted:
            kitmgr.post_delete_host(node_dict['hardwareprofile'],
                                    node_dict['softwareprofile'] if
                                    'softwareprofile' in node_dict else None,
                                    nodes=[node_dict['name']])

    def __scheduleUpdate(self):
        self._syncApi.scheduleClusterUpdate()

    def getInstallerNode(self,
                         session,
                         optionDict: Optional[OptionDict] = None):
        return self._nodeDbApi.getNode(
            session,
            self._cm.getInstaller(),
            optionDict=get_default_relations(optionDict))

    def getProvisioningInfo(self, session: Session, nodeName):
        return self._nodeDbApi.getProvisioningInfo(session, nodeName)

    def startupNode(self,
                    session,
                    nodespec: str,
                    remainingNodeList: List[NodeModel] = None,
                    bootMethod: str = 'n') -> None:
        """
        Raises:
            NodeNotFound
        """

        try:
            nodes = self._nodesDbHandler.expand_nodespec(session, nodespec)

            if not nodes:
                raise NodeNotFound('No matching nodes for nodespec [%s]' %
                                   (nodespec))

            # Break list of nodes into dict keyed on hardware profile
            nodes_dict = self.__processNodeList(nodes)

            for dbHardwareProfile, detailsDict in nodes_dict.items():
                # Get the ResourceAdapter
                adapter = self.__getResourceAdapter(dbHardwareProfile)

                # Call startup action extension
                adapter.startupNode(detailsDict['nodes'],
                                    remainingNodeList=remainingNodeList or [],
                                    tmpBootMethod=bootMethod)

            session.commit()
        except TortugaException:
            session.rollback()
            raise
        except Exception as ex:
            session.rollback()
            self._logger.exception(str(ex))
            raise

    def shutdownNode(self, session, nodespec: str, bSoftShutdown: bool = False) \
            -> None:
        """
        Raises:
            NodeNotFound
        """

        try:
            nodes = self._nodesDbHandler.expand_nodespec(session, nodespec)

            if not nodes:
                raise NodeNotFound('No matching nodes for nodespec [%s]' %
                                   (nodespec))

            d = self.__processNodeList(nodes)

            for dbHardwareProfile, detailsDict in d.items():
                # Get the ResourceAdapter
                adapter = self.__getResourceAdapter(dbHardwareProfile)

                # Call shutdown action extension
                adapter.shutdownNode(detailsDict['nodes'], bSoftShutdown)

            session.commit()
        except TortugaException:
            session.rollback()
            raise
        except Exception as ex:
            session.rollback()
            self._logger.exception(str(ex))
            raise

    def rebootNode(self,
                   session,
                   nodespec: str,
                   bSoftReset: bool = False,
                   bReinstall: bool = False) -> None:
        """
        Raises:
            NodeNotFound
        """

        nodes = self._nodesDbHandler.expand_nodespec(session, nodespec)
        if not nodes:
            raise NodeNotFound('No nodes matching nodespec [%s]' % (nodespec))

        if bReinstall:
            for dbNode in nodes:
                self._bhm.setNodeForNetworkBoot(session, dbNode)

        for dbHardwareProfile, detailsDict in \
                self.__processNodeList(nodes).items():
            # iterate over hardware profile/nodes dict to reboot each
            # node
            adapter = self.__getResourceAdapter(dbHardwareProfile)

            # Call reboot action extension
            adapter.rebootNode(detailsDict['nodes'], bSoftReset)

        session.commit()

    def getNodesByNodeState(self, session, node_state: str,
                            optionDict: Optional[OptionDict] = None) \
            -> TortugaObjectList:
        """
        Get nodes by state
        """

        return self.__populate_nodes(
            session,
            self._nodeDbApi.getNodesByNodeState(
                session,
                node_state,
                optionDict=get_default_relations(optionDict)))

    def getNodesByNameFilter(self, session, nodespec: str,
                             optionDict: OptionDict = None,
                             include_installer: Optional[bool] = True) \
            -> TortugaObjectList:
        """
        Return TortugaObjectList of Node objects matching nodespec
        """

        return self.__populate_nodes(
            session,
            self._nodeDbApi.getNodesByNameFilter(
                session,
                nodespec,
                optionDict=get_default_relations(optionDict),
                include_installer=include_installer))

    def getNodesByAddHostSession(self, session, addHostSession: str,
                                 optionDict: OptionDict = None) \
            -> TortugaObjectList:
        """
        Return TortugaObjectList of Node objects matching add host session
        """

        return self.__populate_nodes(
            session,
            self._nodeDbApi.getNodesByAddHostSession(
                session,
                addHostSession,
                optionDict=get_default_relations(optionDict)))

    def __processNodeList(self, dbNodes: List[NodeModel]) \
            -> Dict[HardwareProfileModel, Dict[str, list]]:
        """
        Returns dict indexed by hardware profile, each with a list of
        nodes in the hardware profile
        """

        d: Dict[HardwareProfileModel, Dict[str, list]] = {}

        for dbNode in dbNodes:
            if dbNode.hardwareprofile not in d:
                d[dbNode.hardwareprofile] = {
                    'nodes': [],
                }

            d[dbNode.hardwareprofile]['nodes'].append(dbNode)

        return d

    def __getResourceAdapter(self, hardwareProfile: HardwareProfileModel):
        """
        Raises:
            OperationFailed
        """

        if not hardwareProfile.resourceadapter:
            raise OperationFailed(
                'Hardware profile [%s] does not have an associated'
                ' resource adapter' % (hardwareProfile.name))

        return resourceAdapterFactory.get_api(
            hardwareProfile.resourceadapter.name) \
            if hardwareProfile.resourceadapter else None
示例#3
0
class NodeManager(TortugaObjectManager):     \
        # pylint: disable=too-many-public-methods

    def __init__(self):
        super(NodeManager, self).__init__()

        self._nodeDbApi = NodeDbApi()
        self._cm = ConfigManager()
        self._bhm = osUtility.getOsObjectFactory().getOsBootHostManager(
            self._cm)
        self._syncApi = SyncApi()
        self._nodesDbHandler = NodesDbHandler()
        self._addHostManager = AddHostManager()
        self._logger = logging.getLogger(NODE_NAMESPACE)

    def __validateHostName(self, hostname: str, name_format: str) -> None:
        """
        Raises:
            ConfigurationError
        """

        bWildcardNameFormat = (name_format == '*')

        if hostname and not bWildcardNameFormat:
            # Host name specified, but hardware profile does not
            # allow setting the host name
            raise ConfigurationError(
                'Hardware profile does not allow setting host names'
                ' of imported nodes')
        elif not hostname and bWildcardNameFormat:
            # Host name not specified but hardware profile expects it
            raise ConfigurationError(
                'Hardware profile requires host names to be set')

    def createNewNode(self,
                      session: Session,
                      addNodeRequest: dict,
                      dbHardwareProfile: HardwareProfileModel,
                      dbSoftwareProfile: Optional[SoftwareProfileModel] = None,
                      validateIp: bool = True,
                      bGenerateIp: bool = True,
                      dns_zone: Optional[str] = None) -> NodeModel:
        """
        Convert the addNodeRequest into a Nodes object

        Raises:
            NicNotFound
        """

        self._logger.debug(
            'createNewNode(): session=[%s], addNodeRequest=[%s],'
            ' dbHardwareProfile=[%s], dbSoftwareProfile=[%s],'
            ' validateIp=[%s], bGenerateIp=[%s]' %
            (id(session), addNodeRequest, dbHardwareProfile.name,
             dbSoftwareProfile.name if dbSoftwareProfile else '(none)',
             validateIp, bGenerateIp))

        hostname = addNodeRequest['name'] \
            if 'name' in addNodeRequest else None

        # Ensure no conflicting options (ie. specifying host name for
        # hardware profile in which host names are generated)
        self.__validateHostName(hostname, dbHardwareProfile.nameFormat)

        node: Node = NodeModel(name=hostname)

        if 'rack' in addNodeRequest:
            node.rack = addNodeRequest['rack']

        node.addHostSession = addNodeRequest['addHostSession']

        # Complete initialization of new node record
        nic_defs = addNodeRequest['nics'] \
            if 'nics' in addNodeRequest else []

        AddHostServerLocal().initializeNode(session,
                                            node,
                                            dbHardwareProfile,
                                            dbSoftwareProfile,
                                            nic_defs,
                                            bValidateIp=validateIp,
                                            bGenerateIp=bGenerateIp,
                                            dns_zone=dns_zone)

        node.hardwareprofile = dbHardwareProfile
        node.softwareprofile = dbSoftwareProfile

        #
        # Fire the tags changed event for all creates that have tags...
        # we have to convert this to a node object because... our API
        # is inconsistent!
        #
        n = Node.getFromDbDict(node.__dict__)
        if n.getTags():
            NodeTagsChanged.fire(node=n.getCleanDict(), previous_tags={})

        # Return the new node
        return node

    def getNode(self, session: Session, name, optionDict: OptionDict = None) \
            -> Node:
        """
        Get node by name

        Raises:
            NodeNotFound
        """

        return self.__populate_nodes(session, [
            self._nodeDbApi.getNode(
                session, name, optionDict=get_default_relations(optionDict))
        ])[0]

    def getNodeById(self,
                    session: Session,
                    nodeId: int,
                    optionDict: OptionDict = None) -> Node:
        """
        Get node by node id

        Raises:
            NodeNotFound
        """

        return self.__populate_nodes(session, [
            self._nodeDbApi.getNodeById(
                session,
                int(nodeId),
                optionDict=get_default_relations(optionDict))
        ])[0]

    def getNodeByIp(self,
                    session: Session,
                    ip: str,
                    optionDict: Dict[str, bool] = None) -> Node:
        """
        Get node by IP address

        Raises:
            NodeNotFound
        """

        return self.__populate_nodes(session, [
            self._nodeDbApi.getNodeByIp(
                session, ip, optionDict=get_default_relations(optionDict))
        ])[0]

    def getNodeList(self,
                    session,
                    tags=None,
                    optionDict: Optional[OptionDict] = None) -> List[Node]:
        """
        Return all nodes

        """
        return self.__populate_nodes(
            session,
            self._nodeDbApi.getNodeList(
                session,
                tags=tags,
                optionDict=get_default_relations(optionDict)))

    def __populate_nodes(self, session: Session, nodes: List[Node]) \
            -> List[Node]:
        """
        Expand non-database fields in Node objects

        """
        class SoftwareProfileMetadataCache(defaultdict):
            def __missing__(self, key):
                metadata = \
                    SoftwareProfileManager().get_software_profile_metadata(
                        session, key
                    )

                self[key] = metadata

                return metadata

        swprofile_map = SoftwareProfileMetadataCache()

        for node in nodes:
            if not node.getSoftwareProfile():
                continue

            node.getSoftwareProfile().setMetadata(
                swprofile_map[node.getSoftwareProfile().getName()])

        return nodes

    def updateNode(self, session: Session, nodeName: str,
                   updateNodeRequest: dict) -> None:
        """
        Calls updateNode() method of resource adapter
        """

        self._logger.debug('updateNode(): name=[{0}]'.format(nodeName))

        try:
            #
            # Get the old version for comparison later
            #
            node_old: Node = self.getNode(session, nodeName)

            db_node = self._nodesDbHandler.getNode(session, nodeName)
            if 'nics' in updateNodeRequest:
                nic = updateNodeRequest['nics'][0]
                if 'ip' in nic:
                    db_node.nics[0].ip = nic['ip']
                    db_node.nics[0].boot = True

            adapter = self.__getResourceAdapter(session,
                                                db_node.hardwareprofile)
            adapter.updateNode(session, db_node, updateNodeRequest)
            run_post_install = False

            if 'state' in updateNodeRequest:
                run_post_install = \
                    db_node.state == state.NODE_STATE_ALLOCATED and \
                    updateNodeRequest['state'] == state.NODE_STATE_PROVISIONED
                db_node.state = updateNodeRequest['state']

            session.commit()

            #
            # Fire events as required
            #
            # Get the current/new state of the node from the DB
            #
            node: Node = self.getNode(session, nodeName)
            if node.getState() != node_old.getState():
                NodeStateChanged.fire(node=node.getCleanDict(),
                                      previous_state=node_old.getState())
            if node.getTags() != node_old.getTags():
                NodeTagsChanged.fire(node=node.getCleanDict(),
                                     previous_tags=node_old.getTags())

            if run_post_install:
                self._logger.debug(
                    'updateNode(): run-post-install for node [{0}]'.format(
                        db_node.name))
                self.__scheduleUpdate()

        except Exception:
            session.rollback()
            raise

    def updateNodeStatus(self,
                         session: Session,
                         nodeName: str,
                         node_state: Optional[str] = None,
                         bootFrom: int = None):
        """Update node status

        If neither 'state' nor 'bootFrom' are not None, this operation will
        update only the 'lastUpdated' timestamp.

        Returns:
            bool indicating whether state and/or bootFrom differed from
            current value
        """

        value = 'None' if bootFrom is None else \
            '1 (disk)' if int(bootFrom) == 1 else '0 (network)'

        self._logger.debug(
            'updateNodeStatus(): node=[%s], node_state=[{%s}],'
            ' bootFrom=[{%s}]', nodeName, node_state, value)

        dbNode = self._nodesDbHandler.getNode(session, nodeName)

        #
        # Capture previous state and node data in dict form for the
        # event later on
        #
        previous_state = dbNode.state
        node_dict = Node.getFromDbDict(dbNode.__dict__).getCleanDict()

        # Bitfield representing node changes (0 = state change,
        # 1 = bootFrom # change)
        changed = 0

        if node_state is not None and node_state != dbNode.state:
            # 'state' changed
            changed |= 1

        if bootFrom is not None and bootFrom != dbNode.bootFrom:
            # 'bootFrom' changed
            changed |= 2

        if changed:
            # Create custom log message
            msg = 'Node [%s] state change:' % (dbNode.name)

            if changed & 1:
                msg += ' state: [%s] -> [%s]' % (dbNode.state, node_state)

                dbNode.state = node_state
                node_dict['state'] = node_state

            if changed & 2:
                msg += ' bootFrom: [%d] -> [%d]' % (dbNode.bootFrom, bootFrom)

                dbNode.bootFrom = bootFrom

            self._logger.info(msg)
        else:
            self._logger.info('Updated timestamp for node [%s]' %
                              (dbNode.name))

        dbNode.lastUpdate = time.strftime('%Y-%m-%d %H:%M:%S',
                                          time.gmtime(time.time()))

        result = bool(changed)

        # Only change local boot configuration if the hardware profile is
        # not marked as 'remote' and we're not acting on the installer
        # node.
        if dbNode.softwareprofile and \
                dbNode.softwareprofile.type != 'installer' and \
                dbNode.hardwareprofile.location != 'remote':
            # update local boot configuration for on-premise nodes
            self._bhm.writePXEFile(session, dbNode, localboot=bootFrom)

        session.commit()

        #
        # If the node state has changed, fire the node state changed
        # event
        #
        if state and (previous_state != state):
            NodeStateChanged.fire(node=node_dict,
                                  previous_state=previous_state)

        return result

    def deleteNode(self, session: Session, nodespec: str, force: bool = False):
        """
        Delete nodes by node spec

        :param Session session: a database session
        :param str nodespec:    a node spec
        :param bool force:      whether or not this is a force operation

        """
        try:
            nodes = self.__get_nodes_for_deletion(session, nodespec)

            kitmgr = KitActionsManager()
            kitmgr.session = session
            self.__delete_nodes(session, kitmgr, nodes)

        except Exception:
            session.rollback()
            raise

    def __get_nodes_for_deletion(self, session: Session,
                                 nodespec: str) -> List[NodeModel]:
        """
        Gets a list of nodes from a node spec.

        :param Session session: a database session
        :param str nodespec:    a node spec

        :raise NodeNotFound:

        """
        nodes = self._nodesDbHandler.expand_nodespec(session,
                                                     nodespec,
                                                     include_installer=False)
        if not nodes:
            raise NodeNotFound(
                'No nodes matching nodespec [{}]'.format(nodespec))

        return nodes

    def __delete_nodes(self, session: Session, kitmgr: KitActionsManager,
                       nodes: List[NodeModel]) -> None:
        """
        :raises DeleteNodeFailed:
        """

        hwprofile_nodes = self.__pre_delete_nodes(kitmgr, nodes)

        # commit node state changes to database
        session.commit()

        for hwprofile, node_data_dicts in hwprofile_nodes.items():
            # build list of NodeModels
            node_objs: List[NodeModel] = [
                node_data_dict['node'] for node_data_dict in node_data_dicts
            ]

            # Call resource adapter deleteNode() entry point
            self.__get_resource_adapter(session,
                                        hwprofile).deleteNode(node_objs)

            # Perform delete node action for each node in hwprofile
            for node_data_dict in node_data_dicts:
                # get JSON object for node record
                node_dict = NodeSchema(
                    only=('hardwareprofile', 'softwareprofile', 'name',
                          'state'),
                    exclude=('softwareprofile.metadata', )).dump(
                        node_data_dict['node']).data

                # Delete the Node
                self._logger.debug('Deleting node [%s]', node_dict['name'])

                #
                # Fire node state change events
                #
                NodeStateChanged.fire(
                    node=node_dict,
                    previous_state=node_data_dict['previous_state'])

                session.delete(node_data_dict['node'])

                # Commit the actual deletion of this node to the DB.  This is required
                # as the post_delete hooks may use a different DB session and we have
                # already commited some changes for this node.
                session.commit()

                self.__post_delete(kitmgr, node_dict)

                self._logger.info('Node [%s] deleted', node_dict['name'])

            # clean up add host session cache
            self._addHostManager.delete_sessions(
                set([
                    node.addHostSession for node in node_objs
                    if node.addHostSession
                ]))

        self.__scheduleUpdate()

    def __pre_delete_nodes(self, kitmgr: KitActionsManager,
                           nodes: List[NodeModel]) \
            -> DefaultDict[HardwareProfileModel, List[NodeModel]]:
        """Collect nodes being deleted, call pre-delete kit action,
        mark them for deletion, and return dict containing nodes
        keyed by hardware profile.
        """

        hwprofile_nodes = defaultdict(list)

        #
        # Mark node states as deleted in the database
        #
        for node in nodes:
            # call pre-delete host kit action
            kitmgr.pre_delete_host(node.hardwareprofile.name,
                                   get_node_swprofile_name(node),
                                   nodes=[node.name])

            #
            # Capture previous state and node data as a dict for firing
            # the event later on
            #
            hwprofile_nodes[node.hardwareprofile].append({
                'node':
                node,
                'previous_state':
                node.state
            })

            # mark node deleted
            node.state = state.NODE_STATE_DELETED

        return hwprofile_nodes

    def __get_resource_adapter(self, session: Session,
                               hardwareProfile: HardwareProfileModel):
        """
        Raises:
            OperationFailed
        """

        if not hardwareProfile.resourceadapter:
            raise OperationFailed(
                'Hardware profile [%s] does not have an associated'
                ' resource adapter' % (hardwareProfile.name))

        adapter = resourceAdapterFactory.get_api(
            hardwareProfile.resourceadapter.name)

        adapter.session = session

        return adapter

    def __process_delete_node_result(self, nodeErrorDict):
        # REALLY!?!? Convert a list of Nodes objects into a list of
        # node names so we can report the list back to the end-user.
        # This needs to be FIXED!

        result = {}
        nodes_deleted = []

        for key, nodeList in nodeErrorDict.items():
            result[key] = [dbNode.name for dbNode in nodeList]

            if key == 'NodesDeleted':
                for node in nodeList:
                    node_deleted = {
                        'name': node.name,
                        'hardwareprofile': node.hardwareprofile.name,
                    }

                    if node.softwareprofile:
                        node_deleted['softwareprofile'] = \
                            node.softwareprofile.name

                    nodes_deleted.append(node_deleted)

        return result, nodes_deleted

    def __post_delete(self, kitmgr: KitActionsManager, node: dict):
        """Call post-delete kit action for deleted node and clean up node
        state files (ie. Puppet certificate, etc.).

        'node' is a JSON object representing the deleted node.
        """

        kitmgr.post_delete_host(node['hardwareprofile']['name'],
                                node['softwareprofile']['name']
                                if node['softwareprofile'] else None,
                                nodes=[node['name']])

        # remove Puppet cert, etc.
        self.__cleanup_node_state_files(node)

    def __cleanup_node_state_files(self, node_dict: dict):
        # Remove the Puppet cert
        self._bhm.deletePuppetNodeCert(node_dict['name'])

        self._bhm.nodeCleanup(node_dict['name'])

    def __scheduleUpdate(self):
        self._syncApi.scheduleClusterUpdate()

    def getInstallerNode(self,
                         session,
                         optionDict: Optional[OptionDict] = None):
        return self._nodeDbApi.getNode(
            session,
            self._cm.getInstaller(),
            optionDict=get_default_relations(optionDict))

    def getProvisioningInfo(self, session: Session, nodeName):
        return self._nodeDbApi.getProvisioningInfo(session, nodeName)

    def startupNode(self,
                    session,
                    nodespec: str,
                    remainingNodeList: List[NodeModel] = None,
                    bootMethod: str = 'n') -> None:
        """
        Raises:
            NodeNotFound
        """

        try:
            nodes = self._nodesDbHandler.expand_nodespec(session, nodespec)

            if not nodes:
                raise NodeNotFound('No matching nodes for nodespec [%s]' %
                                   (nodespec))

            # Break list of nodes into dict keyed on hardware profile
            nodes_dict = self.__processNodeList(nodes)

            for dbHardwareProfile, detailsDict in nodes_dict.items():
                # Get the ResourceAdapter
                adapter = self.__getResourceAdapter(session, dbHardwareProfile)

                # Call startup action extension
                adapter.startupNode(detailsDict['nodes'],
                                    remainingNodeList=remainingNodeList or [],
                                    tmpBootMethod=bootMethod)

            session.commit()
        except TortugaException:
            session.rollback()
            raise
        except Exception as ex:
            session.rollback()
            self._logger.exception(str(ex))
            raise

    def shutdownNode(self,
                     session,
                     nodespec: str,
                     bSoftShutdown: bool = False) -> None:
        """
        Raises:
            NodeNotFound
        """

        try:
            nodes = self._nodesDbHandler.expand_nodespec(session, nodespec)

            if not nodes:
                raise NodeNotFound('No matching nodes for nodespec [%s]' %
                                   (nodespec))

            d = self.__processNodeList(nodes)

            for dbHardwareProfile, detailsDict in d.items():
                # Get the ResourceAdapter
                adapter = self.__getResourceAdapter(session, dbHardwareProfile)

                # Call shutdown action extension
                adapter.shutdownNode(detailsDict['nodes'], bSoftShutdown)

            session.commit()
        except TortugaException:
            session.rollback()
            raise
        except Exception as ex:
            session.rollback()
            self._logger.exception(str(ex))
            raise

    def rebootNode(self,
                   session,
                   nodespec: str,
                   bSoftReset: bool = False,
                   bReinstall: bool = False) -> None:
        """
        Raises:
            NodeNotFound
        """

        nodes = self._nodesDbHandler.expand_nodespec(session, nodespec)
        if not nodes:
            raise NodeNotFound('No nodes matching nodespec [%s]' % (nodespec))

        if bReinstall:
            for dbNode in nodes:
                self._bhm.setNodeForNetworkBoot(session, dbNode)

        for dbHardwareProfile, detailsDict in \
                self.__processNodeList(nodes).items():
            # iterate over hardware profile/nodes dict to reboot each
            # node
            adapter = self.__getResourceAdapter(session, dbHardwareProfile)

            # Call reboot action extension
            adapter.rebootNode(detailsDict['nodes'], bSoftReset)

        session.commit()

    def getNodesByNodeState(self, session, node_state: str,
                            optionDict: Optional[OptionDict] = None) \
            -> TortugaObjectList:
        """
        Get nodes by state
        """

        return self.__populate_nodes(
            session,
            self._nodeDbApi.getNodesByNodeState(
                session,
                node_state,
                optionDict=get_default_relations(optionDict)))

    def getNodesByNameFilter(self, session, nodespec: str,
                             optionDict: OptionDict = None,
                             include_installer: Optional[bool] = True) \
            -> TortugaObjectList:
        """
        Return TortugaObjectList of Node objects matching nodespec
        """

        return self.__populate_nodes(
            session,
            self._nodeDbApi.getNodesByNameFilter(
                session,
                nodespec,
                optionDict=get_default_relations(optionDict),
                include_installer=include_installer))

    def getNodesByAddHostSession(self, session, addHostSession: str,
                                 optionDict: OptionDict = None) \
            -> TortugaObjectList:
        """
        Return TortugaObjectList of Node objects matching add host session
        """

        return self.__populate_nodes(
            session,
            self._nodeDbApi.getNodesByAddHostSession(
                session,
                addHostSession,
                optionDict=get_default_relations(optionDict)))

    def __processNodeList(self, dbNodes: List[NodeModel]) \
            -> Dict[HardwareProfileModel, Dict[str, list]]:
        """
        Returns dict indexed by hardware profile, each with a list of
        nodes in the hardware profile
        """

        d: Dict[HardwareProfileModel, Dict[str, list]] = {}

        for dbNode in dbNodes:
            if dbNode.hardwareprofile not in d:
                d[dbNode.hardwareprofile] = {
                    'nodes': [],
                }

            d[dbNode.hardwareprofile]['nodes'].append(dbNode)

        return d

    def __getResourceAdapter(self, session: Session,
                             hardwareProfile: HardwareProfileModel) \
            -> Optional[ResourceAdapter]:
        """
        Raises:
            OperationFailed
        """

        if not hardwareProfile.resourceadapter:
            raise OperationFailed(
                'Hardware profile [%s] does not have an associated'
                ' resource adapter' % (hardwareProfile.name))

        adapter = resourceAdapterFactory.get_api(
            hardwareProfile.resourceadapter.name) \
            if hardwareProfile.resourceadapter else None

        if not adapter:
            return None

        adapter.session = session

        return adapter