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#!/usr/bin/env python
# domstart - make sure a given domU is running, if not start it
import libvirt
import sys
import os
import libxml2
import pdb
# Parse the XML description of domU from FNAME
# and return a tuple (name, xmldesc) where NAME
# is the name of the domain, and xmldesc is the contetn of FNAME
def read_domain(fname):
fp = open(fname, "r")
xmldesc = fp.read()
fp.close()
doc = libxml2.parseDoc(xmldesc)
name = doc.xpathNewContext().xpathEval("/domain/name")[0].content
return (name, xmldesc)
def usage():
print('Usage: %s domain.xml' % sys.argv[0])
print(' Check that the domain described by DOMAIN.XML is running')
print(' If the domain is not running, create it')
print(' DOMAIN.XML must be a XML description of the domain')
print(' in libvirt\'s XML format')
if len(sys.argv) != 2:
usage()
sys.exit(2)
(name, xmldesc) = read_domain(sys.argv[1])
conn = libvirt.open(None)
if conn is None:
print('Failed to open connection to the hypervisor')
sys.exit(1)
try:
dom = conn.lookupByName(name)
except libvirt.libvirtError:
print("Starting domain %s ... " % name)
dom = conn.createLinux(xmldesc, 0)
if dom is None:
print("failed")
sys.exit(1)
else:
print("done")
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