180 lines
7.1 KiB
Python
180 lines
7.1 KiB
Python
# Copyright 2014 Intel
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# (C) Copyright 2015 Hewlett Packard Enterprise Development Company LP
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Implementation of Inspector abstraction for XenAPI."""
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from eventlet import timeout
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from oslo_config import cfg
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from oslo_utils import units
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try:
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import XenAPI as api
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except ImportError:
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api = None
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from monasca_agent.collector.virt import inspector as virt_inspector
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opt_group = cfg.OptGroup(name='xenapi',
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title='Options for XenAPI')
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OPTS = [
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cfg.StrOpt('connection_url',
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help='URL for connection to XenServer/Xen Cloud Platform.'),
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cfg.StrOpt('connection_username',
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default='root',
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help='Username for connection to XenServer/Xen Cloud '
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'Platform.'),
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cfg.StrOpt('connection_password',
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help='Password for connection to XenServer/Xen Cloud Platform.',
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secret=True),
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cfg.IntOpt('login_timeout',
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default=10,
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help='Timeout in seconds for XenAPI login.'),
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]
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CONF = cfg.CONF
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CONF.register_group(opt_group)
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CONF.register_opts(OPTS, group=opt_group)
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def get_instance_name(instance):
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"""Shortcut to get instance name."""
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return getattr(instance, 'OS-EXT-SRV-ATTR:instance_name', None)
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class XenapiException(virt_inspector.InspectorException):
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pass
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def get_api_session():
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if not api:
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raise ImportError('XenAPI not installed')
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url = CONF.xenapi.connection_url
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username = CONF.xenapi.connection_username
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password = CONF.xenapi.connection_password
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if not url or password is None:
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raise XenapiException('Must specify connection_url, and '
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'connection_password to use')
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exception = api.Failure("Unable to log in to XenAPI "
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"(is the Dom0 disk full?)")
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try:
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session = api.Session(url)
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with timeout.Timeout(CONF.xenapi.login_timeout, exception):
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session.login_with_password(username, password)
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except api.Failure as e:
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msg = "Could not connect to XenAPI: %s" % e.details[0]
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raise XenapiException(msg)
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return session
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class XenapiInspector(virt_inspector.Inspector):
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def __init__(self):
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super(XenapiInspector, self).__init__()
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self.session = get_api_session()
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def _get_host_ref(self):
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"""Return the xenapi host on which nova-compute runs on."""
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return self.session.xenapi.session.get_this_host(self.session.handle)
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def _call_xenapi(self, method, *args):
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return self.session.xenapi_request(method, args)
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def _lookup_by_name(self, instance_name):
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vm_refs = self._call_xenapi("VM.get_by_name_label", instance_name)
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n = len(vm_refs)
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if n == 0:
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raise virt_inspector.InstanceNotFoundException(
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'VM %s not found in XenServer' % instance_name)
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elif n > 1:
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raise XenapiException(
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'Multiple VM %s found in XenServer' % instance_name)
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else:
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return vm_refs[0]
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def inspect_cpu_util(self, instance, duration=None):
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instance_name = get_instance_name(instance)
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vm_ref = self._lookup_by_name(instance_name)
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metrics_ref = self._call_xenapi("VM.get_metrics", vm_ref)
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metrics_rec = self._call_xenapi("VM_metrics.get_record",
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metrics_ref)
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vcpus_number = metrics_rec['VCPUs_number']
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vcpus_utils = metrics_rec['VCPUs_utilisation']
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if len(vcpus_utils) == 0:
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msg = "Could not get VM %s CPU Utilization" % instance_name
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raise XenapiException(msg)
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utils = 0.0
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for num in range(int(vcpus_number)):
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utils += vcpus_utils.get(str(num))
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utils = utils / int(vcpus_number) * 100
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return virt_inspector.CPUUtilStats(util=utils)
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def inspect_memory_usage(self, instance, duration=None):
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instance_name = get_instance_name(instance)
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vm_ref = self._lookup_by_name(instance_name)
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metrics_ref = self._call_xenapi("VM.get_metrics", vm_ref)
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metrics_rec = self._call_xenapi("VM_metrics.get_record",
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metrics_ref)
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# Stat provided from XenServer is in B, converting it to MB.
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memory = int(metrics_rec['memory_actual']) / units.Mi
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return virt_inspector.MemoryUsageStats(usage=memory)
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def inspect_vnic_rates(self, instance, duration=None):
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instance_name = get_instance_name(instance)
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vm_ref = self._lookup_by_name(instance_name)
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vif_refs = self._call_xenapi("VM.get_VIFs", vm_ref)
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if vif_refs:
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for vif_ref in vif_refs:
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vif_rec = self._call_xenapi("VIF.get_record", vif_ref)
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vif_metrics_ref = self._call_xenapi(
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"VIF.get_metrics", vif_ref)
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vif_metrics_rec = self._call_xenapi(
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"VIF_metrics.get_record", vif_metrics_ref)
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interface = virt_inspector.Interface(
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name=vif_rec['uuid'],
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mac=vif_rec['MAC'],
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fref=None,
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parameters=None)
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rx_rate = float(vif_metrics_rec['io_read_kbs']) * units.Ki
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tx_rate = float(vif_metrics_rec['io_write_kbs']) * units.Ki
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stats = virt_inspector.InterfaceRateStats(rx_rate, tx_rate)
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yield (interface, stats)
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def inspect_disk_rates(self, instance, duration=None):
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instance_name = get_instance_name(instance)
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vm_ref = self._lookup_by_name(instance_name)
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vbd_refs = self._call_xenapi("VM.get_VBDs", vm_ref)
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if vbd_refs:
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for vbd_ref in vbd_refs:
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vbd_rec = self._call_xenapi("VBD.get_record", vbd_ref)
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vbd_metrics_ref = self._call_xenapi("VBD.get_metrics",
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vbd_ref)
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vbd_metrics_rec = self._call_xenapi("VBD_metrics.get_record",
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vbd_metrics_ref)
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disk = virt_inspector.Disk(device=vbd_rec['device'])
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# Stats provided from XenServer are in KB/s,
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# converting it to B/s.
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read_rate = float(vbd_metrics_rec['io_read_kbs']) * units.Ki
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write_rate = float(vbd_metrics_rec['io_write_kbs']) * units.Ki
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disk_rate_info = virt_inspector.DiskRateStats(
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read_bytes_rate=read_rate,
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read_requests_rate=0,
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write_bytes_rate=write_rate,
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write_requests_rate=0)
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yield(disk, disk_rate_info)
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