Fix exception that is not properly raised

This commit fixes an exception that was not properly raised, and
also makes the exception more relevant.

This also fixes an outstanding bug where, if the agent
was not associated with a node, get_node_uuid() would fail in an
unexpected manner.

Change-Id: Ifca474a73dd50b5fd2242e5b7e938a5db04f27a8

1 files changed, 11 insertions, 0 deletions

diff --git a/ironic_python_agent/errors.py b/ironic_python_agent/errors.py
index 5c6bdb2c..7219fbda 100644
--- a/ironic_python_agent/errors.py
+++ b/ironic_python_agent/errors.py
@@ -236,3 +236,14 @@ class VirtualMediaBootError(RESTError):
 
 class ExtensionError(Exception):
     pass
+
+
+class UnknownNodeError(Exception):
+    """Error raised when the agent is not associated with an Ironic node."""
+
+    message = 'Agent is not associated with an Ironic node.'
+
+    def __init__(self, message=None):
+        if message is not None:
+            self.message = message
+        super(UnknownNodeError, self).__init__(self.message)