bugfix: Graceful shutdown of VMs

Cleanup phase of PVVP scenario sometimes causes server reboot.
It seems, that forced kill of VMs is the root cause. So graceful
shutdown of VMs was introduced.

Change-Id: I427404406fd7174d2a034f3cf0b51fe0833f9ecf
JIRA: VSPERF-271
Signed-off-by: Martin Klozik <martinx.klozik@intel.com>
Reviewed-by: Maryam Tahhan <maryam.tahhan@intel.com>
Reviewed-by: Al Morton <acmorton@att.com>
Reviewed-by: Christian Trautman <ctrautma@redhat.com>
Reviewed-by: Brian Castelli <brian.castelli@spirent.com>

1 files changed, 25 insertions, 10 deletions

diff --git a/vnfs/qemu/qemu.py b/vnfs/qemu/qemu.py
index cb6d9ecc..ec728c5c 100644
--- a/vnfs/qemu/qemu.py
+++ b/vnfs/qemu/qemu.py
@@ -62,6 +62,10 @@ class IVnfQemu(IVnf):
         else:
             self._net2 = self._net2.split(',')[self._number]
 
+        # set guest loopback application based on VNF configuration
+        # cli option take precedence to config file values
+        self._guest_loopback = S.getValue('GUEST_LOOPBACK')[self._number]
+
 
         name = 'Client%d' % self._number
         vnc = ':%d' % self._number
@@ -116,6 +120,21 @@ class IVnfQemu(IVnf):
         if self._timeout:
             self._config_guest_loopback()
 
+    def stop(self):
+        """
+        Stops VNF instance gracefully first.
+        """
+        # exit testpmd if needed
+        if self._guest_loopback == 'testpmd':
+            self.execute_and_wait('stop', 120, "Done")
+            self.execute_and_wait('quit', 120, "bye")
+
+        # turn off VM
+        self.execute_and_wait('poweroff', 120, "Power down")
+
+        # just for case that graceful shutdown failed
+        super(IVnfQemu, self).stop()
+
     # helper functions
 
     def _login(self, timeout=120):
@@ -196,24 +215,20 @@ class IVnfQemu(IVnf):
 
     def _config_guest_loopback(self):
         """
-        Configure VM to run VNF (e.g. port forwarding application)
+        Configure VM to run VNF, e.g. port forwarding application based on the configuration
         """
-        # set guest loopback application based on VNF configuration
-        # cli option take precedence to config file values
-        guest_loopback = S.getValue('GUEST_LOOPBACK')[self._number]
-
-        if guest_loopback == 'testpmd':
+        if self._guest_loopback == 'testpmd':
             self._login()
             self._configure_testpmd()
-        elif guest_loopback == 'l2fwd':
+        elif self._guest_loopback == 'l2fwd':
             self._login()
             self._configure_l2fwd()
-        elif guest_loopback == 'linux_bridge':
+        elif self._guest_loopback == 'linux_bridge':
             self._login()
             self._configure_linux_bridge()
-        elif guest_loopback != 'buildin':
+        elif self._guest_loopback != 'buildin':
             self._logger.error('Unsupported guest loopback method "%s" was specified. Option'
-                               ' "buildin" will be used as a fallback.', guest_loopback)
+                               ' "buildin" will be used as a fallback.', self._guest_loopback)
 
     def wait(self, prompt=S.getValue('GUEST_PROMPT'), timeout=30):
         super(IVnfQemu, self).wait(prompt=prompt, timeout=timeout)