fireinfo/hypervisor.py

   1 #!/usr/bin/python
   2
   3 import _fireinfo
   4 import system
   5
   6 class Hypervisor(object):
   7         def __init__(self):
   8                 self.__info = _fireinfo.get_hypervisor()
   9
  10         @property
  11         def system(self):
  12                 """
  13                         Return the current instance of the System class.
  14
  15                         We need to do that as a property because otherwise
  16                         we get a recursion.
  17                 """
  18                 return system.System()
  19
  20         @property
  21         def vendor(self):
  22                 """
  23                         Returns the name of the hypervisor vendor.
  24                 """
  25                 if not self.virtual:
  26                         return None
  27
  28                 # Some of the hypervisors can be detected in a right way.
  29                 # We can return them at this place.
  30                 if self.__info["hypervisor"] in ("Xen", "VMWare", "KVM"):
  31                         return self.__info["hypervisor"]
  32
  33                 # Citrix Xen says it is Microsoft Hv.
  34                 if self.__info["hypervisor"] == "Microsoft" and \
  35                                 self.system.bios_vendor == "Xen":
  36                         return "Xen"
  37
  38                 if not self.__info["hypervisor"]:
  39                         # On VMWare systems, the bios vendor string contains "VMWare".
  40                         if self.__is_hypervisor_vmware():
  41                                 return "VMWare"
  42
  43                         # VirtualBox got "innotek GmbH" as bios vendor.
  44                         elif self.__is_hypervisor_virtualbox():
  45                                 return "VirtualBox"
  46
  47                 return "unknown"
  48
  49         @property
  50         def type(self):
  51                 """
  52                         Returns if the host is running in full virt mode or
  53                         if it is running in a paravirtualized environment.
  54                 """
  55                 if not self.virtual:
  56                         return None
  57
  58                 return self.__info["virtype"]
  59
  60         @property
  61         def virtual(self):
  62                 """
  63                         Returns true if the host is running in a virtual environment.
  64                         Otherwise: false.
  65                 """
  66                 return _fireinfo.is_virtualized() or \
  67                         "hypervisor" in self.system.cpu.flags or \
  68                         self.__is_hypervisor_virtualbox() or \
  69                         self.__is_hypervisor_vmware()
  70
  71         def __is_hypervisor_virtualbox(self):
  72                 """
  73                         Check for virtualbox hypervisor by comparing the bios vendor string
  74                         to "innotek GmbH".
  75                 """
  76                 return self.system.bios_vendor == "innotek GmbH"
  77
  78         def __is_hypervisor_vmware(self):
  79                 """
  80                         Check for the VMWare hypervisor by the VMWare Hypervisor port check.
  81
  82                         http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458
  83                 """
  84                 return self.system.bios_vendor.startswith("VMWare-") and \
  85                         _fireinfo.vmware_hypervisor_port_check()
  86
  87
  88 if __name__ == "__main__":
  89         h = Hypervisor()
  90
  91         print "Vendor:", h.vendor
  92         print "Type:", h.type
  93         print "Virtual:", h.virtual