Remove path_exists from NFS/GlusterFS drivers

mkdir -p will not throw an error if the path already exists,
so this method is unneeded in these classes.

Change-Id: I65a67cb75f83f65a6f80c7a90f77c2c5133bd41b

2 files changed, 4 insertions, 22 deletions

diff --git a/nova/tests/virt/libvirt/test_libvirt_volume.py b/nova/tests/virt/libvirt/test_libvirt_volume.py
index 86773dd10..59e7d7fea 100644
--- a/nova/tests/virt/libvirt/test_libvirt_volume.py
+++ b/nova/tests/virt/libvirt/test_libvirt_volume.py
@@ -444,7 +444,7 @@ class LibvirtVolumeTestCase(test.TestCase):
         libvirt_driver.disconnect_volume(connection_info, "vde")
 
         expected_commands = [
-            ('stat', export_mnt_base),
+            ('mkdir', '-p', export_mnt_base),
             ('mount', '-t', 'nfs', export_string, export_mnt_base)]
         self.assertEqual(self.executes, expected_commands)
 
@@ -500,7 +500,7 @@ class LibvirtVolumeTestCase(test.TestCase):
         libvirt_driver.disconnect_volume(connection_info, "vde")
 
         expected_commands = [
-            ('stat', export_mnt_base),
+            ('mkdir', '-p', export_mnt_base),
             ('mount', '-t', 'glusterfs', export_string, export_mnt_base)]
         self.assertEqual(self.executes, expected_commands)
 
diff --git a/nova/virt/libvirt/volume.py b/nova/virt/libvirt/volume.py
index ef8818743..10eb979dc 100644
--- a/nova/virt/libvirt/volume.py
+++ b/nova/virt/libvirt/volume.py
@@ -491,8 +491,7 @@ class LibvirtNFSVolumeDriver(LibvirtBaseVolumeDriver):
 
     def _mount_nfs(self, mount_path, nfs_share, ensure=False):
         """Mount nfs export to mount path."""
-        if not self._path_exists(mount_path):
-            utils.execute('mkdir', '-p', mount_path)
+        utils.execute('mkdir', '-p', mount_path)
 
         # Construct the NFS mount command.
         nfs_cmd = ['mount', '-t', 'nfs']
@@ -513,14 +512,6 @@ class LibvirtNFSVolumeDriver(LibvirtBaseVolumeDriver):
         """returns string that represents hash of base_str (in hex format)."""
         return hashlib.md5(base_str).hexdigest()
 
-    @staticmethod
-    def _path_exists(path):
-        """Check path."""
-        try:
-            return utils.execute('stat', path, run_as_root=True)
-        except processutils.ProcessExecutionError:
-            return False
-
 
 class LibvirtAOEVolumeDriver(LibvirtBaseVolumeDriver):
     """Driver to attach AoE volumes to libvirt."""
@@ -616,8 +607,7 @@ class LibvirtGlusterfsVolumeDriver(LibvirtBaseVolumeDriver):
 
     def _mount_glusterfs(self, mount_path, glusterfs_share, ensure=False):
         """Mount glusterfs export to mount path."""
-        if not self._path_exists(mount_path):
-            utils.execute('mkdir', '-p', mount_path)
+        utils.execute('mkdir', '-p', mount_path)
 
         try:
             utils.execute('mount', '-t', 'glusterfs', glusterfs_share,
@@ -634,14 +624,6 @@ class LibvirtGlusterfsVolumeDriver(LibvirtBaseVolumeDriver):
         """returns string that represents hash of base_str (in hex format)."""
         return hashlib.md5(base_str).hexdigest()
 
-    @staticmethod
-    def _path_exists(path):
-        """Check path."""
-        try:
-            return utils.execute('stat', path, run_as_root=True)
-        except processutils.ProcessExecutionError:
-            return False
-
 
 class LibvirtFibreChannelVolumeDriver(LibvirtBaseVolumeDriver):
     """Driver to attach Fibre Channel Network volumes to libvirt."""