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2a40951148
Consistently use "is" or "is not" to compare variables to None, because doing so is preferrable, as per PEP 8 (http://www.python.org/dev/peps/pep-0008/#programming-recommendations): > Comparisons to singletons like None should always be done with is or > is not, never the equality operators.
51 lines
1.3 KiB
Python
Executable File
51 lines
1.3 KiB
Python
Executable File
#!/usr/bin/env python
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# domstart - make sure a given domU is running, if not start it
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import libvirt
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import sys
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import os
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import libxml2
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import pdb
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# Parse the XML description of domU from FNAME
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# and return a tuple (name, xmldesc) where NAME
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# is the name of the domain, and xmldesc is the contetn of FNAME
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def read_domain(fname):
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fp = open(fname, "r")
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xmldesc = fp.read()
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fp.close()
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doc = libxml2.parseDoc(xmldesc)
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name = doc.xpathNewContext().xpathEval("/domain/name")[0].content
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return (name, xmldesc)
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def usage():
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print 'Usage: %s domain.xml' % sys.argv[0]
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print ' Check that the domain described by DOMAIN.XML is running'
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print ' If the domain is not running, create it'
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print ' DOMAIN.XML must be a XML description of the domain'
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print ' in libvirt\'s XML format'
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if len(sys.argv) != 2:
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usage()
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sys.exit(2)
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(name, xmldesc) = read_domain(sys.argv[1])
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conn = libvirt.open(None)
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if conn is None:
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print 'Failed to open connection to the hypervisor'
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sys.exit(1)
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try:
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dom = conn.lookupByName(name)
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except libvirt.libvirtError:
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print "Starting domain %s ... " % name,
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sys.stdout.flush()
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dom = conn.createLinux(xmldesc, 0)
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if dom is None:
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print "failed"
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sys.exit(1)
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else:
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print "done"
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