1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright (c) 2010 Citrix Systems, Inc.
#
# 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.
"""
Management class for VM-related functions (spawn, reboot, etc).
"""
import logging
from nova import db
from nova import context
from nova.auth.manager import AuthManager
from nova.virt.xenapi.network_utils import NetworkHelper
from nova.virt.xenapi.vm_utils import VMHelper
XenAPI = None
class VMOps(object):
"""
Management class for VM-related tasks
"""
def __init__(self, session):
global XenAPI
if XenAPI is None:
XenAPI = __import__('XenAPI')
self._session = session
# Load XenAPI module in the helper class
VMHelper.late_import()
def list_instances(self):
"""List VM instances"""
vms = []
for vm in self._session.get_xenapi().VM.get_all():
rec = self._session.get_xenapi().VM.get_record(vm)
if not rec["is_a_template"] and not rec["is_control_domain"]:
vms.append(rec["name_label"])
return vms
def spawn(self, instance):
"""Create VM instance"""
vm = VMHelper.lookup(self._session, instance.name)
if vm is not None:
raise Exception('Attempted to create non-unique name %s' %
instance.name)
bridge = db.network_get_by_instance(context.get_admin_context(),
instance['id'])['bridge']
network_ref = \
NetworkHelper.find_network_with_bridge(self._session, bridge)
user = AuthManager().get_user(instance.user_id)
project = AuthManager().get_project(instance.project_id)
vdi_uuid = VMHelper.fetch_image(
self._session, instance.image_id, user, project, True)
kernel = VMHelper.fetch_image(
self._session, instance.kernel_id, user, project, False)
ramdisk = VMHelper.fetch_image(
self._session, instance.ramdisk_id, user, project, False)
vdi_ref = self._session.call_xenapi('VDI.get_by_uuid', vdi_uuid)
vm_ref = VMHelper.create_vm(
self._session, instance, kernel, ramdisk)
VMHelper.create_vbd(self._session, vm_ref, vdi_ref, 0, True)
if network_ref:
VMHelper.create_vif(self._session, vm_ref,
network_ref, instance.mac_address)
logging.debug('Starting VM %s...', vm_ref)
self._session.call_xenapi('VM.start', vm_ref, False, False)
logging.info('Spawning VM %s created %s.', instance.name,
vm_ref)
def reboot(self, instance):
"""Reboot VM instance"""
instance_name = instance.name
vm = VMHelper.lookup(self._session, instance_name)
if vm is None:
raise Exception('instance not present %s' % instance_name)
task = self._session.call_xenapi('Async.VM.clean_reboot', vm)
self._session.wait_for_task(instance.id, task)
def destroy(self, instance):
"""Destroy VM instance"""
vm = VMHelper.lookup(self._session, instance.name)
if vm is None:
# Don't complain, just return. This lets us clean up instances
# that have already disappeared from the underlying platform.
return
# Get the VDIs related to the VM
vdis = VMHelper.lookup_vm_vdis(self._session, vm)
try:
task = self._session.call_xenapi('Async.VM.hard_shutdown',
vm)
self._session.wait_for_task(instance.id, task)
except XenAPI.Failure, exc:
logging.warn(exc)
# Disk clean-up
if vdis:
for vdi in vdis:
try:
task = self._session.call_xenapi('Async.VDI.destroy', vdi)
self._session.wait_for_task(instance.id, task)
except XenAPI.Failure, exc:
logging.warn(exc)
try:
task = self._session.call_xenapi('Async.VM.destroy', vm)
self._session.wait_for_task(instance.id, task)
except XenAPI.Failure, exc:
logging.warn(exc)
def _wait_with_callback(self, instance_id, task, callback):
ret = None
try:
ret = self._session.wait_for_task(instance_id, task)
except XenAPI.Failure, exc:
logging.warn(exc)
callback(ret)
def pause(self, instance, callback):
"""Pause VM instance"""
instance_name = instance.name
vm = VMHelper.lookup(self._session, instance_name)
if vm is None:
raise Exception('instance not present %s' % instance_name)
task = self._session.call_xenapi('Async.VM.pause', vm)
self._wait_with_callback(instance.id, task, callback)
def unpause(self, instance, callback):
"""Unpause VM instance"""
instance_name = instance.name
vm = VMHelper.lookup(self._session, instance_name)
if vm is None:
raise Exception('instance not present %s' % instance_name)
task = self._session.call_xenapi('Async.VM.unpause', vm)
self._wait_with_callback(instance.id, task, callback)
def get_info(self, instance_id):
"""Return data about VM instance"""
vm = VMHelper.lookup_blocking(self._session, instance_id)
if vm is None:
raise Exception('instance not present %s' % instance_id)
rec = self._session.get_xenapi().VM.get_record(vm)
return VMHelper.compile_info(rec)
def get_diagnostics(self, instance_id):
"""Return data about VM diagnostics"""
vm = VMHelper.lookup(self._session, instance_id)
if vm is None:
raise Exception("instance not present %s" % instance_id)
rec = self._session.get_xenapi().VM.get_record(vm)
return VMHelper.compile_diagnostics(self._session, rec)
def get_console_output(self, instance):
"""Return snapshot of console"""
# TODO: implement this to fix pylint!
return 'FAKE CONSOLE OUTPUT of instance'
|