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Detect if VMs is outdated (#168)

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If so - VMs restart is required to see latest template changes.
This commit is contained in:
Marek Marczykowski 2011-04-02 02:11:41 +02:00
parent 5e3b3fe922
commit ab244d803f
1 changed files with 24 additions and 0 deletions
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24
dom0/qvm-core/qubes.py
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@ -480,6 +480,30 @@ class QubesVm(object):
else:
return False
def is_outdated(self):
# Makes sense only on VM based on template
if self.template_vm is None:
return False
if not self.is_running():
return False
rootimg_inode = os.stat(self.template_vm.root_img)
rootcow_inode = os.stat(self.template_vm.rootcow_img)
current_dmdev = "/dev/mapper/snapshot-{0:x}:{1}-{2:x}:{3}".format(
rootimg_inode[2], rootimg_inode[1],
rootcow_inode[2], rootcow_inode[1])
# Don't know why, but 51712 is xvda
# backend node name not available through xenapi :(
p = subprocess.Popen (["xenstore-read",
"/local/domain/0/backend/vbd/{0}/51712/node".format(self.get_xid())],
stdout=subprocess.PIPE)
used_dmdev = p.communicate()[0].strip()
return used_dmdev != current_dmdev
def get_disk_usage(self, file_or_dir):
if not os.path.exists(file_or_dir):
return 0