Source code for ceilometer.compute.virt.xenapi.inspector

# Copyright 2014 Intel
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""Implementation of Inspector abstraction for XenAPI."""

from oslo_config import cfg
from oslo_utils import units
import six.moves.urllib.parse as urlparse
try:
    import XenAPI as api
except ImportError:
    api = None

from ceilometer.compute.pollsters import util
from ceilometer.compute.virt import inspector as virt_inspector
from ceilometer.i18n import _

opt_group = cfg.OptGroup(name='xenapi',
                         title='Options for XenAPI')

OPTS = [
    cfg.StrOpt('connection_url',
               help='URL for connection to XenServer/Xen Cloud Platform.'),
    cfg.StrOpt('connection_username',
               default='root',
               help='Username for connection to XenServer/Xen Cloud '
                    'Platform.'),
    cfg.StrOpt('connection_password',
               help='Password for connection to XenServer/Xen Cloud Platform.',
               secret=True),
]

CONF = cfg.CONF
CONF.register_group(opt_group)
CONF.register_opts(OPTS, group=opt_group)


[docs]class XenapiException(virt_inspector.InspectorException): pass
def swap_xapi_host(url, host_addr): """Replace the XenServer address present in 'url' with 'host_addr'.""" temp_url = urlparse.urlparse(url) # The connection URL is served by XAPI and doesn't support having a # path for the connection url after the port. And username/password # will be pass separately. So the URL like "http://abc:abc@abc:433/abc" # should not appear for XAPI case. temp_netloc = temp_url.netloc.replace(temp_url.hostname, '%s' % host_addr) replaced = temp_url._replace(netloc=temp_netloc) return urlparse.urlunparse(replaced) def get_api_session(): if not api: raise ImportError(_('XenAPI not installed')) url = CONF.xenapi.connection_url username = CONF.xenapi.connection_username password = CONF.xenapi.connection_password if not url or password is None: raise XenapiException(_('Must specify connection_url, and ' 'connection_password to use')) try: session = (api.xapi_local() if url == 'unix://local' else api.Session(url)) session.login_with_password(username, password) except api.Failure as e: if e.details[0] == 'HOST_IS_SLAVE': master = e.details[1] url = swap_xapi_host(url, master) try: session = api.Session(url) session.login_with_password(username, password) except api.Failure as es: raise XenapiException(_('Could not connect slave host: %s ') % es.details[0]) else: msg = _("Could not connect to XenAPI: %s") % e.details[0] raise XenapiException(msg) return session
[docs]class XenapiInspector(virt_inspector.Inspector): def __init__(self): super(XenapiInspector, self).__init__() self.session = get_api_session() def _get_host_ref(self): """Return the xenapi host on which nova-compute runs on.""" return self.session.xenapi.session.get_this_host(self.session.handle) def _call_xenapi(self, method, *args): return self.session.xenapi_request(method, args) def _lookup_by_name(self, instance_name): vm_refs = self._call_xenapi("VM.get_by_name_label", instance_name) n = len(vm_refs) if n == 0: raise virt_inspector.InstanceNotFoundException( _('VM %s not found in XenServer') % instance_name) elif n > 1: raise XenapiException( _('Multiple VM %s found in XenServer') % instance_name) else: return vm_refs[0]
[docs] def inspect_cpu_util(self, instance, duration=None): instance_name = util.instance_name(instance) vm_ref = self._lookup_by_name(instance_name) vcpus_number = int(self._call_xenapi("VM.get_VCPUs_max", vm_ref)) if vcpus_number <= 0: msg = _("Could not get VM %s CPU number") % instance_name raise XenapiException(msg) utils = 0.0 for index in range(vcpus_number): utils += float(self._call_xenapi("VM.query_data_source", vm_ref, "cpu%d" % index)) utils = utils / int(vcpus_number) * 100 return virt_inspector.CPUUtilStats(util=utils)
[docs] def inspect_memory_usage(self, instance, duration=None): instance_name = util.instance_name(instance) vm_ref = self._lookup_by_name(instance_name) total_mem = float(self._call_xenapi("VM.query_data_source", vm_ref, "memory")) try: free_mem = float(self._call_xenapi("VM.query_data_source", vm_ref, "memory_internal_free")) except api.Failure: # If PV tools is not installed in the guest instance, it's # impossible to get free memory. So give it a default value # as 0. free_mem = 0 # memory provided from XenServer is in Bytes; # memory_internal_free provided from XenServer is in KB, # converting it to MB. memory_usage = (total_mem - free_mem * units.Ki) / units.Mi return virt_inspector.MemoryUsageStats(usage=memory_usage)
[docs] def inspect_vnic_rates(self, instance, duration=None): instance_name = util.instance_name(instance) vm_ref = self._lookup_by_name(instance_name) vif_refs = self._call_xenapi("VM.get_VIFs", vm_ref) if vif_refs: for vif_ref in vif_refs: vif_rec = self._call_xenapi("VIF.get_record", vif_ref) vif_metrics_ref = self._call_xenapi( "VIF.get_metrics", vif_ref) vif_metrics_rec = self._call_xenapi( "VIF_metrics.get_record", vif_metrics_ref) interface = virt_inspector.Interface( name=vif_rec['uuid'], mac=vif_rec['MAC'], fref=None, parameters=None) rx_rate = float(vif_metrics_rec['io_read_kbs']) * units.Ki tx_rate = float(vif_metrics_rec['io_write_kbs']) * units.Ki stats = virt_inspector.InterfaceRateStats(rx_rate, tx_rate) yield (interface, stats)
[docs] def inspect_disk_rates(self, instance, duration=None): instance_name = util.instance_name(instance) vm_ref = self._lookup_by_name(instance_name) vbd_refs = self._call_xenapi("VM.get_VBDs", vm_ref) if vbd_refs: for vbd_ref in vbd_refs: vbd_rec = self._call_xenapi("VBD.get_record", vbd_ref) vbd_metrics_ref = self._call_xenapi("VBD.get_metrics", vbd_ref) vbd_metrics_rec = self._call_xenapi("VBD_metrics.get_record", vbd_metrics_ref) disk = virt_inspector.Disk(device=vbd_rec['device']) # Stats provided from XenServer are in KB/s, # converting it to B/s. read_rate = float(vbd_metrics_rec['io_read_kbs']) * units.Ki write_rate = float(vbd_metrics_rec['io_write_kbs']) * units.Ki disk_rate_info = virt_inspector.DiskRateStats( read_bytes_rate=read_rate, read_requests_rate=0, write_bytes_rate=write_rate, write_requests_rate=0) yield(disk, disk_rate_info)

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