Commit fe4f6dca authored by Michael Hanselmann's avatar Michael Hanselmann
Browse files

vcluster: Don't virtualize /etc/hosts path

/etc/hosts is a bit special as it's a system-wide file and the virtual
cluster/node root doesn't apply. The modification of /etc/hosts should
be disabled in virtual clusters. If it isn't, however, the vcluster
functions would raise an exception complaining about a path outside of
the virtual node root. This patch adds a whitelist to exclude
Signed-off-by: default avatarMichael Hanselmann <>
Reviewed-by: default avatarIustin Pop <>
parent 36683bad
......@@ -45,7 +45,7 @@ KVM_CONSOLE_WRAPPER = _autoconf.PKGLIBDIR + "/tools/kvm-console-wrapper"
KVM_IFUP = _autoconf.PKGLIBDIR + "/kvm-ifup"
SETUP_SSH = _autoconf.TOOLSDIR + "/setup-ssh"
XM_CONSOLE_WRAPPER = _autoconf.PKGLIBDIR + "/tools/xm-console-wrapper"
ETC_HOSTS = "/etc/hosts"
# Top-level paths
DATA_DIR = LOCALSTATEDIR + "/lib/ganeti"
......@@ -32,10 +32,17 @@ import os
from ganeti import compat
ETC_HOSTS = "/etc/hosts"
#: List of paths which shouldn't be virtualized
_VPATH_WHITELIST = frozenset([
def _GetRootDirectory(envname):
"""Retrieves root directory from an environment variable.
......@@ -236,7 +243,7 @@ def MakeVirtualPath(path, _noderoot=_VIRT_NODEROOT):
assert os.path.isabs(path)
if _noderoot:
if _noderoot and path not in _VPATH_WHITELIST:
return _VIRT_PATH_PREFIX + _RemoveNodePrefix(path, _noderoot=_noderoot)
return path
......@@ -252,7 +259,7 @@ def LocalizeVirtualPath(path, _noderoot=_VIRT_NODEROOT):
assert os.path.isabs(path)
if _noderoot:
if _noderoot and path not in _VPATH_WHITELIST:
if path.startswith(_VIRT_PATH_PREFIX):
return AddNodePrefix(path[len(_VIRT_PATH_PREFIX):], _noderoot=_noderoot)
......@@ -27,6 +27,7 @@ import unittest
from ganeti import utils
from ganeti import compat
from ganeti import vcluster
from ganeti import pathutils
import testutils
......@@ -200,6 +201,13 @@ class TestMakeVirtualPath(unittest.TestCase):
self.assertEqual(vcluster.MakeVirtualPath("/tmp/file", _noderoot=None),
def testWhitelisted(self):
mvp = vcluster.MakeVirtualPath
for path in vcluster._VPATH_WHITELIST:
self.assertEqual(mvp(path), path)
self.assertEqual(mvp(path, _noderoot=None), path)
self.assertEqual(mvp(path, _noderoot="/tmp"), path)
class TestLocalizeVirtualPath(unittest.TestCase):
def testWrongPrefix(self):
......@@ -225,6 +233,13 @@ class TestLocalizeVirtualPath(unittest.TestCase):
self.assertEqual(vcluster.LocalizeVirtualPath("/tmp/file", _noderoot=None),
def testWhitelisted(self):
lvp = vcluster.LocalizeVirtualPath
for path in vcluster._VPATH_WHITELIST:
self.assertEqual(lvp(path), path)
self.assertEqual(lvp(path, _noderoot=None), path)
self.assertEqual(lvp(path, _noderoot="/tmp"), path)
class TestVirtualPathPrefix(unittest.TestCase):
def test(self):
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