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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.
81 lines
2.0 KiB
Python
Executable File
81 lines
2.0 KiB
Python
Executable File
#!/usr/bin/env python
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# dominfo - print some information about a domain
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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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def usage():
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print 'Usage: %s DOMAIN' % sys.argv[0]
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print ' Print information about the domain DOMAIN'
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def print_section(title):
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print "\n%s" % title
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print "=" * 60
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def print_entry(key, value):
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print "%-10s %-10s" % (key, value)
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def print_xml(key, ctx, path):
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res = ctx.xpathEval(path)
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if res is None or len(res) == 0:
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value="Unknown"
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else:
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value = res[0].content
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print_entry(key, value)
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return value
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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 = sys.argv[1]
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# Connect to libvirt
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conn = libvirt.openReadOnly(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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# Annoyiingly, libvirt prints its own error message here
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except libvirt.libvirtError:
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print "Domain %s is not running" % name
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sys.exit(0)
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info = dom.info()
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print_section("Domain info")
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print_entry("State:", info[0])
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print_entry("MaxMem:", info[1])
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print_entry("UsedMem:", info[2])
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print_entry("VCPUs:", info[3])
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# Read some info from the XML desc
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xmldesc = dom.XMLDesc(0)
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doc = libxml2.parseDoc(xmldesc)
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ctx = doc.xpathNewContext()
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print_section("Kernel")
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print_xml("Type:", ctx, "/domain/os/type")
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print_xml("Kernel:", ctx, "/domain/os/kernel")
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print_xml("initrd:", ctx, "/domain/os/initrd")
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print_xml("cmdline:", ctx, "/domain/os/cmdline")
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print_section("Devices")
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devs = ctx.xpathEval("/domain/devices/*")
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for d in devs:
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ctx.setContextNode(d)
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#pdb.set_trace()
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type = print_xml("Type:", ctx, "@type")
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if type == "file":
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print_xml("Source:", ctx, "source/@file")
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print_xml("Target:", ctx, "target/@dev")
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elif type == "block":
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print_xml("Source:", ctx, "source/@dev")
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print_xml("Target:", ctx, "target/@dev")
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elif type == "bridge":
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print_xml("Source:", ctx, "source/@bridge")
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print_xml("MAC Addr:", ctx, "mac/@address")
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