Connect to a libvirt machine and get information on domains

First configure libvirtd:

/etc/libvirtd/libvirtd.conf:

    listen_tls=1
    listen_tcp=0
    tls_no_verify_certificate=0
    tls_no_verify_certificate=0

Create certificates for libvirtd and put the client ones in /etc/pki/libvirt as described on the http://libvirt.org/remote.html:"libvirtd website".

Restart libvirtd and there you go.

The following skript helps:

  import sys
  import libvirt
  uri=sys.argv[1]
  conn=libvirt.openReadOnly(uri)
   for i in conn.listDomainsID():
    dom=conn.lookupByID(i)
    info=dom.info()
    print "Dom %s, state: %u, maxMemory: %u, memory: %u, nbVirtCPU: %u, cpuTime: %u" %(dom.name(), info[0], info[1], info[2], info[3], info[4])

Descripton of info:

• unsigned char state : the running state, one of virDomainFlags
• unsigned long maxMem : the maximum memory in KBytes allowed
• unsigned long memory : the memory in KBytes used by the domain
• unsigned short nrVirtCpu : the number of virtual CPUs for the domain
• unsigned long long cpuTime : the CPU time used in nanoseconds

On URIs:

You might want to use the no_verify=1 parameter if certs cannot be verified. Given vmhost1 as xen virtualized hostname the url would be: xen://xenhost1/?no_verify=1

Further external information:

• How to configure libvirt for remote management