openstack/virtualbmc
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# virtualbmc
A virtual BMC for controlling virtual machines with IPMI commands

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Virtual BMC
===========
A virtual BMC for controlling virtual machines with IPMI commands
Usage
-----
#. Create a virtual machine
#. Run the virtual BMC::
python ./virtualbmc.py --domain-name <virtual machine name>
#. Control it via IPMI::
# Power the virtual machine on or off
ipmitool -I lanplus -U admin -P password -H 127.0.0.1 power on|off
# Check the power status
ipmitool -I lanplus -U admin -P password -H 127.0.0.1 power status
# Set the boot device to network, hd or cdrom
ipmitool -I lanplus -U admin -P password -H 127.0.0.1 chassis bootdev pxe|disk|cdrom
# Get the current boot device
ipmitool -I lanplus -U admin -P password -H 127.0.0.1 chassis bootparam get 5

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# 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.
import argparse
import sys
import xml.etree.ElementTree as ET
import libvirt
import pyghmi.ipmi.bmc as bmc
# Power states
POWEROFF = 0
POWERON = 1
# Boot device maps
GET_BOOT_DEVICES_MAP = {
'network': 4,
'hd': 8,
'cdrom': 0x14,
}
SET_BOOT_DEVICES_MAP = {
'network': 'network',
'hd': 'hd',
'optical': 'cdrom',
}
class VirtualBMC(bmc.Bmc):
def __init__(self, username, password, port, address,
domain_name, libvirt_uri):
super(VirtualBMC, self).__init__({username: password},
port=port, address=address)
self.domain_name = domain_name
# Create the connection
self.conn = libvirt.open(libvirt_uri)
if self.conn is None:
print('Failed to open connection to the hypervisor '
'using the libvirt URI: "%s"' % libvirt_uri)
sys.exit(1)
try:
self.domain = self.conn.lookupByName(self.domain_name)
except libvirt.libvirtError:
print('Failed to find the domain "%s"' % self.domain_name)
sys.exit(1)
def get_boot_device(self):
parsed = ET.fromstring(self.domain.XMLDesc())
boot_devs = parsed.findall('.//os/boot')
boot_dev = boot_devs[0].attrib['dev']
return GET_BOOT_DEVICES_MAP.get(boot_dev, 0)
def set_boot_device(self, bootdevice):
device = SET_BOOT_DEVICES_MAP.get(bootdevice)
if device is None:
print('Uknown boot device: %s' % bootdevice)
return 0xd5
parsed = ET.fromstring(self.domain.XMLDesc())
os = parsed.find('os')
boot_list = os.findall('boot')
# Clear boot list
for boot_el in boot_list:
os.remove(boot_el)
boot_el = ET.SubElement(os, 'boot')
boot_el.set('dev', device)
try:
self.conn.defineXML(ET.tostring(parsed))
except libvirt.libvirtError as e:
print('Failed setting the boot device to "%s" on the '
'"%s" domain' % (device, self.domain_name))
def get_power_state(self):
try:
if self.domain.isActive():
return POWERON
except libvirt.libvirtError as e:
print('Error getting the power state of domain "%s". '
'Error: %s' % (self.domain_name, e))
return
return POWEROFF
def power_off(self):
try:
self.domain.destroy()
except libvirt.libvirtError as e:
print('Error powering off the domain "%s". Error: %s' %
(self.domain_name, e))
return
def power_on(self):
try:
self.domain.create()
except libvirt.libvirtError as e:
print('Error powering on the domain "%s". Error: %s' %
(self.domain_name, e))
return
if __name__ == '__main__':
parser = argparse.ArgumentParser(
prog='Virtual BMC',
description='Virtual BMC for controlling virtual instances',
)
parser.add_argument('--username',
dest='username',
default='admin',
help='The BMC username; defaults to "admin"')
parser.add_argument('--password',
dest='password',
default='password',
help='The BMC password; defaults to "password"')
parser.add_argument('--port',
dest='port',
type=int,
default=623,
help='Port to listen on; defaults to 623')
parser.add_argument('--address',
dest='address',
default='::',
help='Address to bind to; defaults to ::')
parser.add_argument('--domain-name',
dest='domain_name',
required=True,
help='The name of the virtual machine')
parser.add_argument('--libvirt-uri',
dest='libvirt_uri',
default="qemu:///system",
help='The libvirt URI; defaults to "qemu:///system"')
args = parser.parse_args()
vbmc = VirtualBMC(username=args.username,
password=args.password,
port=args.port,
address=args.address,
domain_name=args.domain_name,
libvirt_uri=args.libvirt_uri)
vbmc.listen()