378 lines
10 KiB
Python
Executable file
378 lines
10 KiB
Python
Executable file
#!/usr/bin/python
|
|
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
Virt management features
|
|
|
|
Copyright 2007, 2012 Red Hat, Inc
|
|
Michael DeHaan <michael.dehaan@gmail.com>
|
|
Seth Vidal <skvidal@fedoraproject.org>
|
|
|
|
This software may be freely redistributed under the terms of the GNU
|
|
general public license.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
"""
|
|
|
|
VIRT_FAILED = 1
|
|
VIRT_SUCCESS = 0
|
|
VIRT_UNAVAILABLE=2
|
|
|
|
try:
|
|
import libvirt
|
|
except ImportError:
|
|
print "failed=True msg='libvirt python module unavailable'"
|
|
sys.exit(1)
|
|
|
|
ALL_COMMANDS = []
|
|
VM_COMMANDS = ['create','status', 'start', 'stop', 'pause', 'unpause',
|
|
'shutdown', 'undefine', 'destroy', 'get_xml', 'autostart']
|
|
HOST_COMMANDS = ['freemem', 'list_vms', 'info', 'nodeinfo', 'virttype']
|
|
ALL_COMMANDS.extend(VM_COMMANDS)
|
|
ALL_COMMANDS.extend(HOST_COMMANDS)
|
|
|
|
VIRT_STATE_NAME_MAP = {
|
|
0 : "running",
|
|
1 : "running",
|
|
2 : "running",
|
|
3 : "paused",
|
|
4 : "shutdown",
|
|
5 : "shutdown",
|
|
6 : "crashed"
|
|
}
|
|
|
|
class LibvirtConnection(object):
|
|
|
|
def __init__(self):
|
|
|
|
cmd = subprocess.Popen("uname -r", shell=True, stdout=subprocess.PIPE,
|
|
close_fds=True)
|
|
output = cmd.communicate()[0]
|
|
|
|
if output.find("xen") != -1:
|
|
conn = libvirt.open(None)
|
|
else:
|
|
conn = libvirt.open("qemu:///system")
|
|
|
|
if not conn:
|
|
raise Exception("hypervisor connection failure")
|
|
|
|
self.conn = conn
|
|
|
|
def find_vm(self, vmid):
|
|
"""
|
|
Extra bonus feature: vmid = -1 returns a list of everything
|
|
"""
|
|
conn = self.conn
|
|
|
|
vms = []
|
|
|
|
# this block of code borrowed from virt-manager:
|
|
# get working domain's name
|
|
ids = conn.listDomainsID()
|
|
for id in ids:
|
|
vm = conn.lookupByID(id)
|
|
vms.append(vm)
|
|
# get defined domain
|
|
names = conn.listDefinedDomains()
|
|
for name in names:
|
|
vm = conn.lookupByName(name)
|
|
vms.append(vm)
|
|
|
|
if vmid == -1:
|
|
return vms
|
|
|
|
for vm in vms:
|
|
if vm.name() == vmid:
|
|
return vm
|
|
|
|
raise Exception("virtual machine %s not found" % vmid)
|
|
|
|
def shutdown(self, vmid):
|
|
return self.find_vm(vmid).shutdown()
|
|
|
|
def pause(self, vmid):
|
|
return self.suspend(self.conn,vmid)
|
|
|
|
def unpause(self, vmid):
|
|
return self.resume(self.conn,vmid)
|
|
|
|
def suspend(self, vmid):
|
|
return self.find_vm(vmid).suspend()
|
|
|
|
def resume(self, vmid):
|
|
return self.find_vm(vmid).resume()
|
|
|
|
def create(self, vmid):
|
|
return self.find_vm(vmid).create()
|
|
|
|
def destroy(self, vmid):
|
|
return self.find_vm(vmid).destroy()
|
|
|
|
def undefine(self, vmid):
|
|
return self.find_vm(vmid).undefine()
|
|
|
|
def get_status2(self, vm):
|
|
state = vm.info()[0]
|
|
return VIRT_STATE_NAME_MAP.get(state,"unknown")
|
|
|
|
def get_status(self, vmid):
|
|
state = self.find_vm(vmid).info()[0]
|
|
return VIRT_STATE_NAME_MAP.get(state,"unknown")
|
|
|
|
def nodeinfo(self):
|
|
return self.conn.getInfo()
|
|
|
|
def get_type(self):
|
|
return self.conn.getType()
|
|
|
|
def get_maxVcpus(self, vmid):
|
|
vm = self.conn.lookupByName(vmid)
|
|
return vm.maxVcpus()
|
|
|
|
def get_maxMemory(self, vmid):
|
|
vm = self.conn.lookupByName(vmid)
|
|
return vm.maxMemory()
|
|
|
|
def getFreeMemory(self):
|
|
return self.conn.getFreeMemory()
|
|
|
|
def get_autostart(self, vmid):
|
|
vm = self.conn.lookupByName(vmid)
|
|
return vm.autostart()
|
|
|
|
def set_autostart(self, vmid, val):
|
|
vm = self.conn.lookupByName(vmid)
|
|
return vm.setAutostart(val)
|
|
|
|
|
|
|
|
class Virt(object):
|
|
|
|
def __get_conn(self):
|
|
self.conn = LibvirtConnection()
|
|
return self.conn
|
|
|
|
def get_vm(self, vmid):
|
|
self.__get_conn()
|
|
return self.conn.find_vm(vmid)
|
|
|
|
def state(self):
|
|
vms = self.list_vms()
|
|
state = []
|
|
for vm in vms:
|
|
state_blurb = self.conn.get_status(vm)
|
|
state.append("%s %s" % (vm,state_blurb))
|
|
return state
|
|
|
|
def info(self):
|
|
vms = self.list_vms()
|
|
info = dict()
|
|
for vm in vms:
|
|
data = self.conn.find_vm(vm).info()
|
|
# libvirt returns maxMem, memory, and cpuTime as long()'s, which
|
|
# xmlrpclib tries to convert to regular int's during serialization.
|
|
# This throws exceptions, so convert them to strings here and
|
|
# assume the other end of the xmlrpc connection can figure things
|
|
# out or doesn't care.
|
|
info[vm] = {
|
|
"state" : VIRT_STATE_NAME_MAP.get(data[0],"unknown"),
|
|
"maxMem" : str(data[1]),
|
|
"memory" : str(data[2]),
|
|
"nrVirtCpu" : data[3],
|
|
"cpuTime" : str(data[4]),
|
|
}
|
|
info[vm]["autostart"] = self.conn.get_autostart(vm)
|
|
|
|
return info
|
|
|
|
def nodeinfo(self):
|
|
self.__get_conn()
|
|
info = dict()
|
|
data = self.conn.nodeinfo()
|
|
info = {
|
|
"cpumodel" : str(data[0]),
|
|
"phymemory" : str(data[1]),
|
|
"cpus" : str(data[2]),
|
|
"cpumhz" : str(data[3]),
|
|
"numanodes" : str(data[4]),
|
|
"sockets" : str(data[5]),
|
|
"cpucores" : str(data[6]),
|
|
"cputhreads" : str(data[7])
|
|
}
|
|
return info
|
|
|
|
def list_vms(self):
|
|
self.conn = self.__get_conn()
|
|
vms = self.conn.find_vm(-1)
|
|
results = []
|
|
for x in vms:
|
|
try:
|
|
results.append(x.name())
|
|
except:
|
|
pass
|
|
return results
|
|
|
|
def virttype(self):
|
|
return self.__get_conn().get_type()
|
|
|
|
def autostart(self, vmid):
|
|
self.conn = self.__get_conn()
|
|
return self.conn.set_autostart(vmid, True)
|
|
|
|
def freemem(self):
|
|
self.conn = self.__get_conn()
|
|
return self.conn.getFreeMemory()
|
|
|
|
def shutdown(self, vmid):
|
|
""" Make the machine with the given vmid stop running. Whatever that takes. """
|
|
self.__get_conn()
|
|
self.conn.shutdown(vmid)
|
|
return 0
|
|
|
|
|
|
def pause(self, vmid):
|
|
""" Pause the machine with the given vmid. """
|
|
|
|
self.__get_conn()
|
|
return self.conn.suspend(vmid)
|
|
|
|
def unpause(self, vmid):
|
|
""" Unpause the machine with the given vmid. """
|
|
|
|
self.__get_conn()
|
|
return self.conn.resume(vmid)
|
|
|
|
def create(self, vmid):
|
|
""" Start the machine via the given vmid """
|
|
|
|
self.__get_conn()
|
|
return self.conn.create(vmid)
|
|
|
|
def start(self, vmid):
|
|
""" Start the machine via the given id/name """
|
|
|
|
self.__get_conn()
|
|
return self.conn.create(vmid)
|
|
|
|
def destroy(self, vmid):
|
|
""" Pull the virtual power from the virtual domain, giving it virtually no time to virtually shut down. """
|
|
self.__get_conn()
|
|
return self.conn.destroy(vmid)
|
|
|
|
def undefine(self, vmid):
|
|
""" Stop a domain, and then wipe it from the face of the earth. (delete disk/config file) """
|
|
|
|
self.__get_conn()
|
|
return self.conn.undefine(vmid)
|
|
|
|
def status(self, vmid):
|
|
"""
|
|
Return a state suitable for server consumption. Aka, codes.py values, not XM output.
|
|
"""
|
|
self.__get_conn()
|
|
return self.conn.get_status(vmid)
|
|
|
|
def get_xml(self, vmid):
|
|
"""
|
|
Receive a Vm id as input
|
|
Return an xml describing vm config returned by a libvirt call
|
|
"""
|
|
|
|
conn = libvirt.openReadOnly(None)
|
|
if conn == None:
|
|
return (-1,'Failed to open connection to the hypervisor')
|
|
try:
|
|
domV = conn.lookupByName(vmid)
|
|
except:
|
|
return (-1,'Failed to find the main domain')
|
|
return domV.XMLDesc(0)
|
|
|
|
def get_maxVcpus(self, vmid):
|
|
"""
|
|
Gets the max number of VCPUs on a guest
|
|
"""
|
|
|
|
self.__get_conn()
|
|
return self.conn.get_maxVcpus(vmid)
|
|
|
|
def get_max_memory(self, vmid):
|
|
"""
|
|
Gets the max memory on a guest
|
|
"""
|
|
|
|
self.__get_conn()
|
|
return self.conn.get_MaxMemory(vmid)
|
|
|
|
def core(module):
|
|
|
|
state = module.params.get('state', None)
|
|
guest = module.params.get('name', None)
|
|
command = module.params.get('command', None)
|
|
|
|
v = Virt()
|
|
res = {}
|
|
|
|
|
|
if state:
|
|
if not guest:
|
|
module.fail_json(msg = "state change requires a guest specified")
|
|
|
|
res['changed'] = False
|
|
if state == 'running':
|
|
if v.status(guest) is not 'running':
|
|
res['changed'] = True
|
|
res['msg'] = v.start(guest)
|
|
elif state == 'shutdown':
|
|
if v.status(guest) is not 'shutdown':
|
|
res['changed'] = True
|
|
res['msg'] = v.shutdown(guest)
|
|
else:
|
|
module.fail_json(msg="unexpected state")
|
|
|
|
return VIRT_SUCCESS, res
|
|
|
|
if command:
|
|
if command in VM_COMMANDS:
|
|
if not guest:
|
|
module.fail_json(msg = "%s requires 1 argument: guest" % command)
|
|
res = getattr(v, command)(guest)
|
|
if type(res) != dict:
|
|
res = { command: res }
|
|
return VIRT_SUCCESS, res
|
|
|
|
elif hasattr(v, command):
|
|
res = getattr(v, command)()
|
|
if type(res) != dict:
|
|
res = { command: res }
|
|
return VIRT_SUCCESS, res
|
|
|
|
else:
|
|
module.fail_json(msg="Command %s not recognized" % basecmd)
|
|
|
|
module.fail_json(msg="expected state or command parameter to be specified")
|
|
|
|
def main():
|
|
|
|
module = AnsibleModule(argument_spec=dict(
|
|
name = dict(aliases=['guest']),
|
|
state = dict(choices=['running', 'shutdown']),
|
|
command = dict(choices=ALL_COMMANDS),
|
|
))
|
|
|
|
rc = VIRT_SUCCESS
|
|
try:
|
|
rc, result = core(module)
|
|
except Exception, e:
|
|
module.fail_json(msg=str(e))
|
|
|
|
if rc != 0: # something went wrong emit the msg
|
|
module.fail_json(rc=rc, msg=result)
|
|
else:
|
|
module.exit_json(**result)
|
|
|
|
|
|
# this is magic, see lib/ansible/module_common.py
|
|
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
|
|
main()
|