Ensure CoreExceptions are handled gracefully (#476)

Ensure CoreExceptions are handled gracefully

SUMMARY

CoreExceptions, when raised, should have a reasonably helpful and
actionable message associated with them. This adds a final check in
module execution to gracefully fail from these exceptions. A new
fail_from_exception method is added both to simplify exiting the module,
and to ensure that any chained exceptions are available when using -vvv.

ISSUE TYPE

COMPONENT NAME

ADDITIONAL INFORMATION

Reviewed-by: Alina Buzachis <None>
Reviewed-by: Joseph Torcasso <None>

plugins/modules/k8s_rollback.py

@@ -262,9 +262,12 @@ def main():
         module_class=AnsibleModule, argument_spec=argspec(), supports_check_mode=True
     )
 
-    client = get_api_client(module=module)
-    svc = K8sService(client, module)
-    execute_module(svc)
+    try:
+        client = get_api_client(module=module)
+        svc = K8sService(client, module)
+        execute_module(svc)
+    except CoreException as e:
+        module.fail_from_exception(e)
 
 
 if __name__ == "__main__":