[afnog] Xen can only see 2.9G of 8G RAM on Dell R200 with CentOS 5.5

[Hugo Lombard]

On Fri, Apr 29, 2011 at 02:09:43PM +0200, Hugo Lombard wrote:
> 
> libvirt can expose that (and more)
> 

Quick example (requires libvirt-python):

#!/usr/bin/python -u
import libvirt
import sys
import os

if not os.access("/proc/xen", os.R_OK):
    print 'System is not running a Xen kernel'
    sys.exit(1)

conn = libvirt.openReadOnly(None)
if conn == None:
    print 'Failed to open connection to the hypervisor'
    sys.exit(1)

ids = conn.listDomainsID()
if ids == None or len(ids) == 0:
    print 'Failed to list running domains'
    sys.exit(1)

for id in ids:
    try:
        dom = conn.lookupByID(id)
        (state, maxmem, mem, nvcpu, cputime) = dom.info()
        print '%d %s %d %d' % (dom.ID(), dom.name(), mem, maxmem)
    except:
        print 'Failed to find the domain with ID %d' % id
        sys.exit(1)


-- 
Hugo Lombard