Fix config value in example_config.py

Update README with ctrl-c issue and wrap callback with try/catch

README.rst

@@ -65,7 +65,7 @@ Running
    construction. e.g. ``SelfSignDriver(**drivers['selfsign'])``
 
    The *actions* section contains actions to perform on different events. So
-   far the possible events are:
+   far the possible events are
 
     - Successful refresh of a certificate
     - Failure to refresh a certificate
@@ -99,6 +99,15 @@ with. This can be done using ::
 
     openssl genrsa 2048 > ca.key
 
+Known Issues
+"""""""""""
+
+Ctrl-C doens't work
+
+    Currently you cannot interrupt the cathead process due to APScheduler not
+    supporting this. When you run ``cathead config.py`` in the terminal you have to
+    termiate the process with ``Ctrl-z`` and ``kill %1`` (or whatever job it was).
+
 Naming
 """"""
 

cathead/scheduler.py

@@ -50,7 +50,10 @@ class Scheduler(object):
             self._scheduler.add_job(watcher.check_and_update, 'interval',
                                     seconds=new_interval, id=key_path)
             if callback:
-                callback()
+                try:
+                    callback()
+                except Exception as e:
+                    LOG.exception(e)
         return success_callback
 
     def _create_failure_callback(self, key_path):

example_config.py

@@ -19,7 +19,7 @@ CONF = {
         {
             'name': 'selfsign',
             'driver': 'cathead.drivers.selfsign.SelfSignDriver',
-            'ca_key': 'ca.p.key',
+            'ca_key_file': 'ca.p.key',
         },
         {
             'name': 'eca',