Get information about current domains using python + libvirt

Question

I am trying to make a simple script that will get various information about starting domains on the xen host.

So far I have:

import libvirt import pprint conn = libvirt.open('xen:///') for id in conn.listDomainsID(): dom = conn.lookupByID(id) infos = libvirt.virDomainGetInfo(dom) 

which gives me the following error:

 AttributeError: 'module' object has no attribute 'virDomainGetInfo' 

Which, according to the API (http://www.libvirt.org/html/libvirt-libvirt.html#virDomainGetInfo), should at least return something to me.

Any clue? (I'm new to python)

Answer 1

From the documentation: http://www.libvirt.org/python.html

 There is a couple of function who don't map directly to their C counterparts due to specificities in their argument conversions: * virConnectListDomains is replaced by virDomain::listDomainsID(self) which returns a list of the integer ID for the currently running domains * virDomainGetInfo is replaced by virDomain::info() which returns a list of 1. state: one of the state values (virDomainState) 2. maxMemory: the maximum memory used by the domain 3. memory: the current amount of memory used by the domain 4. nbVirtCPU: the number of virtual CPU 5. cpuTime: the time used by the domain in nanoseconds 

Answer 2

To get documentation on libvirt APIs in python, use the on-line help.

Run your python interpreter (just enter python into the shell).

 >>> import libvirt >>> help(libvirt) 

This will give you detailed libvirt documentation.

Answer 3

 import libvirt import xml.etree.ElementTree as ET conn = libvirt.open(name) domain = conn.lookupByName(domain_name) domain_config = ET.fromstring(domain.XMLDesc()) domain_disks = domain_config.findall('//disk')