Hi all,
I wrote a small python-script to monitor the status of the started VMs
based on the xenmon.py and the following code I got from Anthony Liguori:
----------------------------------------
import sys
sys.path.append('/usr/lib/python')
sys.path.append('/usr/lib64/python')
from xen.xend.XendClient import server
from xen.xend import sxp
def parse_doms_info(info):
def get_info(n, t, d):
return t(sxp.child_value(info, n, d))
return {
'dom' : get_info('domid', int, -1),
'name' : get_info('name', str, '??'),
'mem' : get_info('memory', int, 0),
'vcpus' : get_info('online_vcpus', int, 0),
'state' : get_info('state', str, '??'),
'cpu_time' : get_info('cpu_time', float, 0),
'ssidref' : get_info('ssidref', int, 0),
}
doms = server.xend_list_domains()
print 'Name ID Mem(MiB) VCPUs State Time(s)'
for dom in doms:
d = parse_doms_info(dom)
if (d['ssidref'] != 0):
d['ssidstr'] = (" s:%04x/p:%04x" %
((d['ssidref'] >> 16) & 0xffff,
d['ssidref'] & 0xffff))
else:
d['ssidstr'] = ""
print ("%(name)-32s %(dom)3d %(mem)8d %(vcpus)5d %(state)5s%
(cpu_time)7.1f% (ssidstr)s" % d)
----------------------------------------
I wrote the script on SUSE SLES 10.0 Beta 3 with Xen 3.0_8659-2.
Unfortunately this script (and therefor my one too) ist not running
anymore with the latest SUSE SLES 10.0 Beta 9 that includes Xen
3.0.2_09434-2 :-(
It breaks at line "doms = server.xend_list_domains()" with the following
error:
----------------------------------------
Traceback (most recent call last):
File "xentest1.py", line 22, in ?
doms = server.xend_list_domains()
File "/usr/lib/python2.4/xmlrpclib.py", line 1096, in __call__
return self.__send(self.__name, args)
File "/usr/lib/python2.4/xmlrpclib.py", line 1383, in __request
verbose=self.__verbose
File "/usr/lib/python2.4/site-packages/xen/util/xmlrpclib2.py", line
46, in request
return Transport.request(self, host, '/RPC2', request_body, verbose)
File "/usr/lib/python2.4/xmlrpclib.py", line 1147, in request
return self._parse_response(h.getfile(), sock)
File "/usr/lib/python2.4/xmlrpclib.py", line 1286, in _parse_response
return u.close()
File "/usr/lib/python2.4/xmlrpclib.py", line 744, in close
raise Fault(**self._stack[0])
xmlrpclib.Fault: <Fault 1: 'Traceback (most recent call last):\n File
"/usr/lib/python2.4/site-packages/xen/util/xmlrpclib2.py", line 74, in
_marshaled_dispatch\n response = self._dispatch(method, params)\n
File "/usr/lib/python2.4/SimpleXMLRPCServer.py", line 408, in
_dispatch\n raise Exception(\'method "%s" is not supported\' %
method)\nException: method "xend_list_domains" is not supported\n'>
----------------------------------------
If I see right it now uses "/usr/lib/python2.4/SimpleXMLRPCServer.py"
(what does not exist in Xen 3.0_8659-2) and breaks because the method
"xend_list_domains" is not supported anymore I use to get the
domain-informations with the script.
Is there a better way to get the VM-status like name, memory, state,
CPU-usage etc. via Python than using the mechanism from xenmon.py and
the above one?
Thanks a lot for your answers,
--
Chau y hasta luego,
Thorolf
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