286 lines
10 KiB
Python
286 lines
10 KiB
Python
# Copyright 2013 IBM Corp.
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"""
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Module to contain all of the local OS routines
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"""
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'''
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Created on Aug 1, 2013
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@author: John Kasperski
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'''
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from oslo_log import log as logging
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from powervc.common.client import factory
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from powervc.common.constants import SERVICE_TYPES
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from powervc.common.constants import LOCAL_OS
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from powervc.common.gettextutils import _
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from powervc.neutron.client import neutron_client_bindings
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from powervc.neutron.common import constants
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from powervc.neutron.common import utils
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from powervc.neutron.db import powervc_db_v2
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from powervc.common import config as cfg
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from powervc.common import messaging
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LOG = logging.getLogger(__name__)
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class Client(neutron_client_bindings.Client):
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"""Local OS access methods"""
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def __init__(self, client, agent):
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if not client:
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return
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self.os = LOCAL_OS
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self.db = powervc_db_v2.PowerVCAgentDB()
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self.agent = agent
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super(Client, self).__init__(client, self.os)
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self._create_amqp_listeners()
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# A cache to save image uuids on power.
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self.power_image_cache = []
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# Save nova/glance client
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self.nova = None
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self.glance = None
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def _create_amqp_listeners(self):
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"""Listen for AMQP messages from the local OS"""
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LOG.debug("Enter _create_amqp_listeners(local) method")
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endpoint = messaging.NotificationEndpoint(log=LOG)
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endpoint.register_handler(constants.EVENT_NETWORK_CREATE,
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self._handle_network_create)
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endpoint.register_handler(constants.EVENT_NETWORK_UPDATE,
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self._handle_network_update)
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endpoint.register_handler(constants.EVENT_NETWORK_DELETE,
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self._handle_network_delete)
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endpoint.register_handler(constants.EVENT_SUBNET_CREATE,
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self._handle_subnet_create)
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endpoint.register_handler(constants.EVENT_SUBNET_UPDATE,
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self._handle_subnet_update)
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endpoint.register_handler(constants.EVENT_SUBNET_DELETE,
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self._handle_subnet_delete)
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endpoint.register_handler(constants.EVENT_PORT_CREATE,
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self._handle_port_create)
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endpoint.register_handler(constants.EVENT_PORT_UPDATE,
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self._handle_port_update)
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endpoint.register_handler(constants.EVENT_PORT_DELETE,
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self._handle_port_delete)
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endpoints = [
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endpoint,
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]
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LOG.debug("Starting to listen...... ")
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messaging.start_listener(cfg.AMQP_OPENSTACK_CONF,
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constants.AMQP_EXCHANGE,
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constants.AMQP_TOPIC,
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endpoints)
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LOG.debug("Exit _create_amqp_listeners(local) method")
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def _handle_network_create(self,
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context=None,
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ctxt=None,
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event_type=None,
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payload=None):
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network = payload.get('network')
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network_id = network.get('id')
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if not utils.is_network_mappable(network):
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LOG.info(_("Network %s is not mappable"), network_id)
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return
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db_net = self.db.get_network(local_id=network_id)
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if db_net:
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LOG.info(_("DB entry for network %s already exists"), network_id)
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return
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self.agent.queue_event(self.os, event_type, network)
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def _handle_network_update(self,
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context=None,
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ctxt=None,
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event_type=None,
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payload=None):
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network = payload.get('network')
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self.agent.queue_event(self.os, event_type, network)
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def _handle_network_delete(self,
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context=None,
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ctxt=None,
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event_type=None,
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payload=None):
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network_id = payload.get('network_id')
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self.agent.queue_event(self.os, event_type, network_id)
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def _handle_subnet_create(self,
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context=None,
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ctxt=None,
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event_type=None,
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payload=None):
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subnet = payload.get('subnet')
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subnet_id = subnet.get('id')
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if not utils.is_subnet_mappable(subnet):
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LOG.info(_("Subnet %s is not mappable"), subnet_id)
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return
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db_sub = self.db.get_subnet(local_id=subnet_id)
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if db_sub:
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LOG.info(_("DB entry for subnet %s already exists"), subnet_id)
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return
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self.agent.queue_event(self.os, event_type, subnet)
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def _handle_subnet_update(self,
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context=None,
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ctxt=None,
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event_type=None,
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payload=None):
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subnet = payload.get('subnet')
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self.agent.queue_event(self.os, event_type, subnet)
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def _handle_subnet_delete(self,
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context=None,
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ctxt=None,
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event_type=None,
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payload=None):
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subnet_id = payload.get('subnet_id')
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self.agent.queue_event(self.os, event_type, subnet_id)
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def _handle_port_create(self,
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context=None,
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ctxt=None,
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event_type=None,
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payload=None):
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port = payload.get('port')
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port_id = port.get('id')
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if not utils.is_port_mappable(port):
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LOG.info(_("Port %s is not mappable"), port_id)
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return
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db_port = self.db.get_port(local_id=port_id)
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if db_port:
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LOG.info(_("DB entry for port %s already exists"), port_id)
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return
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self.agent.queue_event(self.os, event_type, port)
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def _handle_port_update(self,
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context=None,
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ctxt=None,
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event_type=None,
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payload=None):
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port = payload.get('port')
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self.agent.queue_event(self.os, event_type, port)
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def _handle_port_delete(self,
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context=None,
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ctxt=None,
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event_type=None,
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payload=None):
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port_id = payload.get('port_id')
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self.agent.queue_event(self.os, event_type, port_id)
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def get_power_vm_mapping(self):
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"""
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Return dict with PowerVC to local instance uuid mappings
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"""
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vm_map = {}
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if not self.nova:
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self.nova = factory.LOCAL.get_client(str(SERVICE_TYPES.compute))
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try:
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local_instances = self.nova.manager.list_all_servers()
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except Exception as e:
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LOG.exception(_("Exception occurred getting servers: %s"), e)
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return vm_map
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for inst in local_instances:
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metadata = inst._info.get(constants.METADATA)
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if metadata:
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pvc_id = metadata.get(constants.PVC_ID)
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if pvc_id:
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vm_map[pvc_id] = inst._info.get('id')
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return vm_map
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def is_instance_valid(self, uuid):
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"""
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Check if this VM instance is still valid. Call nova client
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to retrieve the VM information.
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"""
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# Verify uuid is valid
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if not uuid or len(uuid) == 0:
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return False
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# Check to see if this is a reserved port that we created while we
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# are waiting for the PowerVC side to go away
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if uuid.startswith(constants.RSVD_PORT_PREFIX)\
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or uuid == constants.POWERVC_LOCKDEVICE_ID:
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return False
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if not self.nova:
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self.nova = factory.LOCAL.get_client(str(SERVICE_TYPES.compute))
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try:
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inst = self.nova.manager.get(uuid)
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except Exception as e:
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"""
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If the instance can not be found, exception will be thrown. These
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exceptions should be caught and not break the agent.
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"""
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LOG.exception(_("Exception occurred getting server %s: %s"),
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uuid, e)
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return False
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if inst:
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return True
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return False
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def is_instance_on_power(self, uuid):
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"""
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Return True if an instance is hosted on power.
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"""
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# Verify uuid is valid
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if not uuid or len(uuid) == 0:
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return False
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if not self.nova:
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self.nova = factory.LOCAL.get_client(str(SERVICE_TYPES.compute))
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try:
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inst = self.nova.manager.get(uuid)
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except Exception as e:
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"""
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If the instance can not be found, exception will be thrown. These
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exceptions should be caught and not break the agent.
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"""
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LOG.exception(_("Exception occurred getting server %s: %s"),
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uuid, e)
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return False
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if inst:
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metadata = inst._info[constants.METADATA]
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if constants.PVC_ID in metadata:
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# Return true if we have pvc_id for this instance.
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return True
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else:
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img_uuid = inst.image.get('id', '')
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if img_uuid in self.power_image_cache:
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return True
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else:
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# Check if the image is hosted on power.
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if not self.glance:
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self.glance = factory.LOCAL.\
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get_client(str(SERVICE_TYPES.image))
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try:
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img = self.glance.getImage(img_uuid)
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except Exception as e:
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LOG.exception(_("Exception occurred getting image "
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"%s: %s"), img_uuid, e)
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return False
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if constants.POWERVM == img.get(constants.HYPERVISOR_TYPE,
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''):
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self.power_image_cache.append(img_uuid)
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return True
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return False
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# Return false if we can't find this instance locally.
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return False
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