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Porting the virt module to new module core.

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This commit is contained in:
Michael DeHaan 2012-07-30 21:16:29 -04:00
parent da44fb1e43
commit d0f6410326
1 changed files with 48 additions and 120 deletions
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168
library/virt
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@ -17,29 +17,23 @@ VIRT_FAILED = 1
VIRT_SUCCESS = 0
VIRT_UNAVAILABLE=2
try:
import json
except ImportError:
import simplejson as json
# other modules
import os
import sys
import subprocess
import syslog
try:
import libvirt
except ImportError:
print json.dumps({
"failed" : True,
"msg" : "libvirt python module unavailable",
"rc": VIRT_UNAVAILABLE,
})
print "failed=True msg='libvirt python module unavailable'"
sys.exit(1)
import shlex
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",
@ -175,7 +169,6 @@ class Virt(object):
state.append("%s %s" % (vm,state_blurb))
return state
def info(self):
vms = self.list_vms()
info = dict()
@ -227,7 +220,6 @@ class Virt(object):
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)
@ -237,87 +229,60 @@ class Virt(object):
return self.conn.getFreeMemory()
def shutdown(self, vmid):
"""
Make the machine with the given vmid stop running.
Whatever that takes.
"""
""" 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. """
"""
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.
"""
""" 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 """
"""
Start the machine via the given mac address.
"""
self.__get_conn()
return self.conn.create(vmid)
def start(self, vmid):
""" Start the machine via the given id/name """
"""
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.
"""
""" 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.
by deleting the disk image and its configuration file.
"""
""" 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')
@ -327,7 +292,6 @@ class Virt(object):
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
@ -344,59 +308,18 @@ class Virt(object):
self.__get_conn()
return self.conn.get_MaxMemory(vmid)
def main():
rc = VIRT_SUCCESS
vm_commands = ['create','status', 'start', 'stop', 'pause', 'unpause',
'shutdown', 'undefine', 'destroy', 'get_xml', 'autostart']
host_commands = ['freemem', 'list_vms', 'info', 'nodeinfo', 'virttype']
msg = """
virtmodule arguments:
state=[running|shutdown] guest=guestname
command=some_virt_command [guest=guestname]
"""
if len(sys.argv) == 1:
return VIRT_FAILED, msg
def core(module):
argfile = sys.argv[1]
if not os.path.exists(argfile):
msg = "Argument file not found"
return VIRT_FAILED, msg
args = open(argfile, 'r').read()
items = shlex.split(args)
syslog.openlog('ansible-%s' % os.path.basename(__file__))
syslog.syslog(syslog.LOG_NOTICE, 'Invoked with %s' % args)
if not len(items):
return VIRT_FAILED, msg
# guest=name state=[running|shutdown|destroyed|undefined]
# command=[some command] [guest=name]
params = {}
if '=' not in args:
msg = "No proper arguments provided to virt module: %s" % args
return VIRT_FAILED, msg
for x in items:
(k, v) = x.split("=")
params[k] = v
state = params.get('state', None)
guest = params.get('guest', params.get('name', None))
command = params.get('command', None)
options = params.get('options', [])
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:
msg = "state change requires a guest specified"
return VIRT_FAILED, msg
module.fail_json(msg = "state change requires a guest specified")
res['changed'] = False
if state == 'running':
@ -407,15 +330,15 @@ def main():
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 command in VM_COMMANDS:
if not guest:
msg = "%s requires 1 argument: guest" % command
return VIRT_FAILED, msg
module.fail_json(msg = "%s requires 1 argument: guest" % command)
res = getattr(v, command)(guest)
if type(res) != dict:
res = { command: res }
@ -428,25 +351,30 @@ def main():
return rc, res
else:
msg = "Command %s not recognized" % basecmd
rc = VIRT_FAILED
return rc, msg
module.fail_json(msg="Command %s not recognized" % basecmd)
module.fail_json(msg="expected state or command parameter to be specified")
if __name__ == "__main__":
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 = main()
rc, result = core(module)
except Exception, e:
rc = 1
result = str(e)
module.fail_json(msg=str(e))
if rc != 0: # something went wrong emit the msg
print json.dumps({
"failed" : rc,
"msg" : result,
"rc": rc,
})
sys.exit(rc)
module.fail_json(rc=rc, msg=result)
else:
print json.dumps(result)
module.exit_json(**result)
# this is magic, see lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
main()