11413: Wrap destroy_node with similar logic to create_node: on exception check

the node list to determine if the node was actually destroyed successfully.

diff --git a/services/nodemanager/arvnodeman/computenode/driver/__init__.py b/services/nodemanager/arvnodeman/computenode/driver/__init__.py
index c78f1c6b8d63160c40e7e57d9b29f57d07e59dcf..29b04845b653190f88c306094486ac030add3af7 100644 (file)
--- a/services/nodemanager/arvnodeman/computenode/driver/__init__.py
+++ b/services/nodemanager/arvnodeman/computenode/driver/__init__.py
@@ -219,6 +219,23 @@ class BaseComputeNodeDriver(RetryMixin):
         return (isinstance(exception, cls.CLOUD_ERRORS) or
                 type(exception) is Exception)
 
+    def destroy_node(self, cloud_node):
+        try:
+            return self.real.destroy_node(cloud_node)
+        except self.CLOUD_ERRORS as destroy_error:
+            # Sometimes the destroy node request succeeds but times out and
+            # raises an exception instead of returning success.  If this
+            # happens, we get a noisy stack trace.  Check if the node is still
+            # on the node list.  If it is gone, we can declare victory.
+            try:
+                self.search_for_now(cloud_node.id, 'list_nodes')
+            except ValueError:
+                # If we catch ValueError, that means search_for_now didn't find
+                # it, which means destroy_node actually succeeded.
+                return True
+            # The node is still on the list.  Re-raise.
+            raise
+
     # Now that we've defined all our own methods, delegate generic, public
     # attributes of libcloud drivers that we haven't defined ourselves.
     def _delegate_to_real(attr_name):