name : function_virt_check.py import os import tuned.logs from . import base from tuned.utils.commands import commands class virt_check(base.Function): """ Checks whether running inside virtual machine (VM) or on bare metal. If running inside VM expands to argument 1, otherwise expands to argument 2 (even on error). """ def __init__(self): # 2 arguments super(virt_check, self).__init__("virt_check", 2, 2) def execute(self, args): if not super(virt_check, self).execute(args): return None (ret, out) = self._cmd.execute(["virt-what"]) if ret == 0 and len(out) > 0: return args[0] return args[1]