[Test] Start/Stop of snapd deamon on the cloned volume

Test Cases in this module tests the
USS functionality of snapshots snapd
on cloned volume and validated snapshots
are present inside .snaps directory by
terminating snapd on one by one nodes
and validating .snaps directory is still accessible.

Change-Id: I98d48268e7c5c5952a7f0f544960203d8634b7ac
Signed-off-by: Sri Vignesh <sselvan@redhat.com>

1 files changed, 27 insertions, 1 deletions

diff --git a/glustolibs-gluster/glustolibs/gluster/snap_ops.py b/glustolibs-gluster/glustolibs/gluster/snap_ops.py
index 1e792ada7..0fba7771b 100644
--- a/glustolibs-gluster/glustolibs/gluster/snap_ops.py
+++ b/glustolibs-gluster/glustolibs/gluster/snap_ops.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python
-#  Copyright (C) 2015-2016  Red Hat, Inc. <http://www.redhat.com>
+#  Copyright (C) 2015-2020  Red Hat, Inc. <http://www.redhat.com>
 #
 #  This program is free software; you can redistribute it and/or modify
 #  it under the terms of the GNU General Public License as published by
@@ -859,3 +859,29 @@ def snap_deactivate(mnode, snapname):
 
     cmd = "gluster snapshot deactivate %s --mode=script" % snapname
     return g.run(mnode, cmd)
+
+
+def terminate_snapd_on_node(mnode):
+    """Terminate snapd on the specified node
+
+    Args:
+        mnode(str):node on which commands has to be executed
+
+    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.
+    """
+    cmd = "ps aux| grep -m1 snapd | awk '{print $2}'"
+    _, out, _ = g.run(mnode, cmd)
+    if out is None:
+        g.log.error("Failed to get the snapd PID using command %s", cmd)
+        return None
+    cmd = "kill -9 %s" % out
+    return g.run(mnode, cmd)