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Viewing changes to landscape/lib/vm_info.py

  • Committer: Package Import Robot
  • Author(s): Andreas Hasenack
  • Date: 2012-04-10 14:28:48 UTC
  • mfrom: (1.1.27)
  • mto: This revision was merged to the branch mainline in revision 35.
  • Revision ID: package-import@ubuntu.com-20120410142848-7xsy4g2xii7y7ntc
Import upstream version 12.04.3

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landscape/lib/vm_info.py
 
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"""
 
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Network introspection utilities using ioctl and the /proc filesystem.
 
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"""
 
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import os
 
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def get_vm_info(root_path="/"):
 
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    """
 
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    This is a utility that returns the virtualization type
 
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    It loops through some possible configurations and return a string with
 
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    the name of the technology being used or None if there's no match
 
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    """
 
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    def join_root_path(path):
 
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        return os.path.join(root_path, path)
 
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    xen_paths = ["proc/sys/xen", "proc/xen"]
 
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    xen_paths = map(join_root_path, xen_paths)
 
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    vz_path = os.path.join(root_path, "proc/vz")
 
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    if os.path.exists(vz_path):
 
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        return "openvz"
 
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    elif filter(os.path.exists, xen_paths):
 
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        return "xen"
 
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    # /sys/bus/xen exists on most machines, but only virtual machines have
 
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    # devices
 
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    sys_xen_path = join_root_path("sys/bus/xen/devices")
 
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    if os.path.isdir(sys_xen_path) and os.listdir(sys_xen_path):
 
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        return "xen"
 
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    cpu_info_path = os.path.join(root_path, "proc/cpuinfo")
 
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    if os.path.exists(cpu_info_path):
 
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        try:
 
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            fd = open(cpu_info_path)
 
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            cpuinfo = fd.read()
 
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            if "QEMU Virtual CPU" in cpuinfo:
 
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                return "kvm"
 
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        finally:
 
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            fd.close()
 
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    sys_vendor_path = os.path.join(root_path, "sys", "class", "dmi", "id",
 
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                                   "sys_vendor")
 
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    if os.path.exists(sys_vendor_path):
 
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        try:
 
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            fd = open(sys_vendor_path)
 
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            file_content = fd.read()
 
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            if "VMware, Inc." in file_content:
 
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                return "vmware"
 
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        finally:
 
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            fd.close()
 
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    return ""