[Xen-API] trying to get some data out of XenAPI

["Henning Sprang" <henning_sprang@xxxxxx>]

Hi,
I wanted to try to get some data out of the XenAPI for monitoring a Xen host.

So, in the end I want ro read some of the host and vm metrics
(hints on how to get total cpu usage and vm cpu usage would be great - but I 
guess when i have the first steps this will be obvious). From what I heard and 
read about the API, this must be very easy.

But there are no simple examples to get started using the api. The 
xenapi_create.py seems to operate in a totally different environment - I 
actually don't really see how it uses the API itself.

Now I try to get started with the code from Ewan's presenbtation at the Xen 
summit, and I end up getting this:

The code I run:

import sys
sys.path.append('/usr/lib/python')

>from xen.xm.XenAPI import Session
session = Session('http://localhost:9363/')
session.login_with_password('henning', 'test')
print session
vm_list = session.xenapi.VM.get_all()
for vm_ref in vm_list:
        vm_record = session.xenapi.VM.get_record(session, vm_ref)
        print "VM name:" + vm_record.name_label
        VM.start(session, vm_ref, false)
        vbd_list = VM.get_VBDs(session, vm_ref)

But all I get is 


<ServerProxy for localhost:9363/>
Traceback (most recent call last):
  File "xenapi-test.py", line 28, in ?
    vm_record = session.xenapi.VM.get_record(session, vm_ref)
  File "/usr/lib/python/xen/xm/XenAPI.py", line 213, in __call__
    return self.__send(self.__name, args)
  File "/usr/lib/python/xen/xm/XenAPI.py", line 141, in xenapi_request
    result = _parse_result(getattr(self, methodname)(*full_params))
  File "/usr/lib/python/xen/xm/XenAPI.py", line 188, in _parse_result
    raise Failure(result['ErrorDescription'])
xen.xm.XenAPI.Failure: The VM handle {'last_login_method': 
'login_with_password', '_ServerProxy__transport': {'verbose': 0}, 
'_ServerProxy__handler': '/', '_ServerProxy__host': 'localhost:9363', 
'_ServerProxy__verbose': 0, '_ServerProxy__allow_none': 1, '_session': 
'b11780a0-0bd1-a60d-7537-be5da410fb3a', '_ServerProxy__encoding': None, 
'last_login_params': ['henning', 'test']} is invalid.


My authentication is set to "none" in the xend config - so any login should be 
working. I also tried if there is a method login() without any password, but 
failed, I also tried using two emtpy strings for logging in, and, last but not 
least, I tried to use pam authentication, but always got wrong password errors. 
There seem to be missing something here.

Henning




_______________________________________________
xen-api mailing list
xen-api@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-api