Merge "Add host maintenance mode support for PowerVC Driver"

common-powervc/powervc/common/client/extensions/nova.py

@@ -290,6 +290,16 @@ class PVCServerManager(servers.ServerManager):
         _resp, body = self.api.client.get(url)
         return body
 
+    def set_host_maintenance_mode(self, host, mode):
+        url = "/ego/prs/hypervisor_maintenance/%s" % host
+        if mode:
+            status = "enable"
+        else:
+            status = "disable"
+        body = {"status": status,
+                "migrate": "none"}
+        return self._update(url, body)
+
 
 class StorageConnectivityGroup(client_base.Resource):
     """

nova-powervc/powervc/nova/driver/virt/powervc/driver.py

@@ -1021,7 +1021,18 @@ class PowerVCDriver(driver.ComputeDriver):
         """Start/Stop host maintenance window. On start, it triggers
         guest VMs evacuation.
         """
-        raise NotImplementedError()
+        try:
+            self._service.set_host_maintenance_mode(host, mode)
+        except Exception as e:
+            # return powervc error message to uplayer
+            LOG.error(_("Set host maintenance mode failed: %s"), e)
+            return e.message
+        # return 'on_maintenance' or 'off_maintenance' string
+        # to nova-api response if pvc performed with no Exception
+        if mode:
+            return 'on_maintenance'
+        else:
+            return 'off_maintenance'
 
     def set_host_enabled(self, host, enabled):
         """Sets the specified host's ability to accept new instances."""

nova-powervc/powervc/nova/driver/virt/powervc/service.py

@@ -60,6 +60,10 @@ class PowerVCService(object):
         self.longrun_initial_delay = CONF.powervc.longrun_initial_delay
         # Add version checking as required
 
+    def set_host_maintenance_mode(self, host, mode):
+        resp = self._manager.set_host_maintenance_mode(host, mode)
+        return resp
+
     def list_instances(self):
         """Return the names of all the instances known to the virtualization
         layer, as a list.