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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.
"""This is a simple, but working proof of concept of using pyghmi.ipmi.bmc to
control a VM
"""
import argparse
import sys
import threading
import libvirt
import pyghmi.ipmi.bmc as bmc
def lifecycle_callback(connection, domain, event, detail, console):
console.state = console.domain.state(0)
def error_handler(unused, error):
if (error[0] == libvirt.VIR_ERR_RPC
and error[1] == libvirt.VIR_FROM_STREAMS):
return
def stream_callback(stream, events, console):
try:
data = console.stream.recv(1024)
except Exception:
return
if console.sol:
console.sol.send_data(data)
class LibvirtBmc(bmc.Bmc):
"""A class to provide an IPMI interface to the VirtualBox APIs."""
def __init__(self, authdata, hypervisor, domain, port):
super(LibvirtBmc, self).__init__(authdata, port)
# Rely on libvirt to throw on bad data
self.conn = libvirt.open(hypervisor)
self.name = domain
self.domain = self.conn.lookupByName(domain)
self.state = self.domain.state(0)
self.stream = None
self.run_console = False
self.conn.domainEventRegister(lifecycle_callback, self)
self.sol_thread = None
def cold_reset(self):
# Reset of the BMC, not managed system, here we will exit the demo
print('shutting down in response to BMC cold reset request')
sys.exit(0)
def get_power_state(self):
if self.domain.isActive():
return 'on'
else:
return 'off'
def power_off(self):
if not self.domain.isActive():
return 0xd5 # Not valid in this state
self.domain.destroy()
def power_on(self):
if self.domain.isActive():
return 0xd5 # Not valid in this state
self.domain.create()
def power_reset(self):
if not self.domain.isActive():
return 0xd5 # Not valid in this state
self.domain.reset()
def power_shutdown(self):
if not self.domain.isActive():
return 0xd5 # Not valid in this state
self.domain.shutdown()
def is_active(self):
return self.domain.isActive()
def check_console(self):
if (self.state[0] == libvirt.VIR_DOMAIN_RUNNING
or self.state[0] == libvirt.VIR_DOMAIN_PAUSED):
if self.stream is None:
self.stream = self.conn.newStream(libvirt.VIR_STREAM_NONBLOCK)
self.domain.openConsole(None, self.stream, 0)
self.stream.eventAddCallback(libvirt.VIR_STREAM_EVENT_READABLE,
stream_callback, self)
else:
if self.stream:
self.stream.eventRemoveCallback()
self.stream = None
return self.run_console
def activate_payload(self, request, session):
super(LibvirtBmc, self).activate_payload(request, session)
self.run_console = True
self.sol_thread = threading.Thread(target=self.loop)
self.sol_thread.start()
def deactivate_payload(self, request, session):
self.run_console = False
self.sol_thread.join()
super(LibvirtBmc, self).deactivate_payload(request, session)
def iohandler(self, data):
if self.stream:
self.stream.send(data)
def loop(self):
while self.check_console():
libvirt.virEventRunDefaultImpl()
def main():
parser = argparse.ArgumentParser(
prog='virshbmc',
description='Pretend to be a BMC and proxy to virsh',
formatter_class=argparse.ArgumentDefaultsHelpFormatter
)
parser.add_argument('--port',
dest='port',
type=int,
default=623,
help='(UDP) port to listen on')
parser.add_argument('--connect',
dest='hypervisor',
default='qemu:///system',
help='The hypervisor to connect to')
parser.add_argument('--domain',
dest='domain',
required=True,
help='The name of the domain to manage')
args = parser.parse_args()
libvirt.virEventRegisterDefaultImpl()
libvirt.registerErrorHandler(error_handler, None)
mybmc = LibvirtBmc({'admin': 'password'},
hypervisor=args.hypervisor,
domain=args.domain,
port=args.port)
mybmc.listen()
if __name__ == '__main__':
sys.exit(main())
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