From b59fdaa9aa71f61230305a8f23e41c9c7c80e7b7 Mon Sep 17 00:00:00 2001
From: Slawek Kaplonski <skaplons@redhat.com>
Date: Tue, 3 Dec 2019 10:09:06 +0100
Subject: [PATCH] Log exact error during getting value from file

Before this patch function get_value_from_file() was only
logging something like "Unable to access {filename}" but it
would be useful sometimes to check what was exact reason of
IOError so lets log this info also.

TrivialFix

Related-bug: #1853652

Change-Id: I28b1753a8d5767babbb6f06a581ffe1fc4ad75d3
---
 neutron/agent/linux/utils.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/neutron/agent/linux/utils.py b/neutron/agent/linux/utils.py
index 7f8566f4110..228a1603760 100644
--- a/neutron/agent/linux/utils.py
+++ b/neutron/agent/linux/utils.py
@@ -257,8 +257,9 @@ def get_value_from_file(filename, converter=None):
                 return converter(f.read()) if converter else f.read()
             except ValueError:
                 LOG.error('Unable to convert value in %s', filename)
-    except IOError:
-        LOG.debug('Unable to access %s', filename)
+    except IOError as error:
+        LOG.debug('Unable to access %(filename)s; Error: %(error)s',
+                  {'filename': filename, 'error': error})
 
 
 def remove_conf_files(cfg_root, uuid):