Re: How to add debug messages in Ganeti project

[Gangbiao Liu]

On Tue, Apr 21, 2015 at 5:17 PM, Petr Pudlák <pud...@google.com> wrote:
> Hi,

Hi Petr,

>
> in Ganeti we never use 'print', you need to use the logging framework to see
> messages in appropriate logs. Look for 'logging.debug', 'logging.info' etc.
> calls in the code to see how logging is used in Ganeti.
>

Actually, I have also tried logging.info and logging.debug as follows

diff --git a/lib/storage/filestorage.py b/lib/storage/filestorage.py
index 0e37d59..8910313 100644
--- a/lib/storage/filestorage.py
+++ b/lib/storage/filestorage.py
@@ -35,6 +35,7 @@
 import logging
 import errno
 import os
+import sys

 from ganeti import compat
 from ganeti import constants
@@ -44,6 +45,7 @@ from ganeti import utils
 from ganeti.utils import io
 from ganeti.storage import base

+logging.basicConfig(stream=sys.stdout, level=logging.DEBUG)

 class FileDeviceHelper(object):

@@ -436,6 +438,8 @@ def CheckFileStoragePathAcceptance(
                                       " was not accessible." % _filename)

   if _ComputeWrongFileStoragePaths([path]):
+    logging.info('Path is %s', path)
+    logging.debug('Path is %s', path)
     raise errors.FileStoragePathError("Path '%s' uses a forbidden prefix" %
                                       path)


However, I cannot still get any log messages (I added above) from
stdout or log files under /var/log/ganeti. I find 'doc/design-2.0.rst'
says logging system of Ganeti will be switched completely to the
standard python logging module so I use above way. Currently, I find
other parts of Ganeti have realized/used Log/LogInfo/LogWarning/...
APIs. Let me see how to use them.


Cheers, Gangbiao