pvc/pvcf.py

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#!/usr/bin/env python3
import os, sys, libvirt, uuid
#
# Generic function helpers for PVC
#
# > lookupByUUID
# This function is a wrapper for libvirt.lookupByUUID which fixes some problems
# 1. Takes a text UUID and handles converting it to bytes
# 2. Try's it and returns a sensible value if not
def lookupByUUID(tuuid):
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conn = None
dom = None
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libvirt_name = "qemu:///system"
# Convert the text UUID to bytes
buuid = uuid.UUID(tuuid).bytes
# Try
try:
# Open a libvirt connection
conn = libvirt.open(libvirt_name)
if conn == None:
print('>>> %s - Failed to open local libvirt connection.' % self.domuuid)
return dom
# Lookup the UUID
dom = conn.lookupByUUID(buuid)
# Fail
except:
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pass
# After everything
finally:
# Close the libvirt connection
if conn != None:
conn.close()
# Return the dom object (or None)
return dom