def _get_tree (path):
""" return a dict , parsed from xenstore-ls """
cmd = "xenstore-ls %s" % (path)
out = call_cmd (cmd)
lines = out.split ("\n")
_static = {
'node': {},
'last_key': None,
'last_value': None,
'last_space': 0,
}
stack = []
def __process (space, key, value):
#print _static['last_space'], space, _static['last_key'], _static['last_value'], key, value
if _static['last_key'] is None:
_static['last_space'] = 0
elif _static['last_value'] == "" and _static['last_space'] + 1 == space:
_static['node'][_static['last_key']] = {}
stack.append (_static['node'])
_static['node'] = _static['node'][_static['last_key']]
elif _static['last_space'] > space:
_static['node'][_static['last_key']] = _static['last_value']
for i in xrange (0, _static['last_space'] - space):
_static['node'] = stack.pop ()
else:
assert _static['last_space'] == space
_static['node'][_static['last_key']] = _static['last_value']
_static['last_key'] = key
_static['last_value'] = value
_static['last_space'] = space
return
reg_key_value = re.compile (r"^(\s*)([\w\-]+)\s*=\s*\"(.*)\".*$")
for line in lines:
om = re.match (reg_key_value, line)
if not om:
raise Exception ("unexpect format: %s" % (line))
space = len (om.group (1))
key = om.group (2)
value = om.group (3)
__process (space, key, value)
__process (0, None, None)
return _static['node']
def destroy (domain):
call_cmd ("xm destroy %s" % (domain))
def shutdown (domain):
call_cmd ("xm shutdown %s" % (domain))
def restore (path):
call_cmd ("xm restore %s" % (path))
def save (domain, path):
call_cmd ("xm save %s %s" % (domain, path))
def create (xen_config):
if not os.path.exists (xen_config):
raise Exception ("%s not exist" % (xen_config))
call_cmd ("xm create %s" % (xen_config))
def _read (path):
return call_cmd ("xenstore-read %s" % (path))
def _list (path):
out = call_cmd ("xenstore-list %s" % (path))
return out.split ("\n")
def mem_total ():
""" return mem total (MB) in Xen """
out = call_cmd ("xl info | grep total_memory")
return int(out.strip("\r\n").split (":")[1].strip ())
def mem_free ():
""" return mem free (MB) in Xen """
out = call_cmd ("xl info | grep free_memory")
return int(out.strip("\r\n").split (":")[1].strip ())