Add library to reset particular volume option

Currently there is a library to reset the volume entirely.
There needs to be a library to reset a particular volume option
because if a user has set a lot of other volume options then it
becomes a tedious job to reset and set the other options explicitly.

The library function 'reset_volume_option' takes particular
volume options as a string and resets it.

Change-Id: I2049ea4a49d321d921d940f34e124d1f34bfa068
Signed-off-by: Vinayak Papnoi <vpapnoi@redhat.com>

1 files changed, 35 insertions, 0 deletions

diff --git a/glustolibs-gluster/glustolibs/gluster/volume_ops.py b/glustolibs-gluster/glustolibs/gluster/volume_ops.py
index e478ed979..0b3c94b07 100644
--- a/glustolibs-gluster/glustolibs/gluster/volume_ops.py
+++ b/glustolibs-gluster/glustolibs/gluster/volume_ops.py
@@ -594,6 +594,41 @@ def set_volume_options(mnode, volname, options):
     return _rc
 
 
+def reset_volume_option(mnode, volname, option, force=False):
+    """Resets the volume option
+
+    Args:
+        mnode (str): Node on which cmd has to be executed
+        volname (str): volume name
+        option (str): volume option
+
+    Kwargs:
+        force (bool): If this option is set to True, then reset volume
+            will get executed with force option. If it is set to False,
+            then reset volume will get executed without force option
+
+    Returns:
+        tuple: Tuple containing three elements (ret, out, err).
+            The first element 'ret' is of type 'int' and is the return value
+            of command execution.
+
+            The second element 'out' is of type 'str' and is the stdout value
+            of the command execution.
+
+            The third element 'err' is of type 'str' and is the stderr value
+            of the command execution.
+
+    Example:
+        reset_volume_option("abc.xyz.com", "testvol", "option")
+    """
+    if force:
+        cmd = ("gluster volume reset %s %s force --mode=script"
+               % (volname, option))
+    else:
+        cmd = "gluster volume reset %s %s --mode=script" % (volname, option)
+    return g.run(mnode, cmd)
+
+
 def volume_info(mnode, volname='all'):
     """Executes gluster volume info cli command