Release 0.12: Retry EBUSY in guest agent

CHANGELOG.rst

@@ -11,6 +11,23 @@ to `semantic versioning`_.
 .. _Keep a Changelog: http://keepachangelog.com/
 .. _semantic versioning: http://semver.org/
 
+`Release 0.12`_ (2019-12-05)
+----------------------------
+
+Retry character device access in guest agent when ``EBUSY`` error is reported.
+
+At my employer we operate 200+ virtual servers that have Negotiator installed
+and in recent months we've started building more and more monitoring on top of
+Negotiator, resulting in hundreds of invocations per day. This is when I
+started seeing intermittent errors like the following::
+
+ IOError: [Errno 16] Device or resource busy: '/dev/vport2p2'
+
+The new retry on ``EBUSY`` behavior is intended to minimize occurrences of such
+race conditions.
+
+.. _Release 0.12: https://github.com/xolox/python-negotiator/compare/0.11...0.12
+
 `Release 0.11`_ (2019-10-11)
 ----------------------------
 

common/negotiator_common/__init__.py

@@ -32,7 +32,7 @@
 from negotiator_common.config import BUILTIN_COMMANDS_DIRECTORY, USER_COMMANDS_DIRECTORY
 
 # Semi-standard module versioning.
-__version__ = '0.11'
+__version__ = '0.12'
 
 # Initialize a logger for this module.
 logger = logging.getLogger(__name__)

guest/negotiator_guest/__init__.py

@@ -30,7 +30,7 @@
 from negotiator_common.utils import GracefulShutdown
 
 # Semi-standard module versioning.
-__version__ = '0.11'
+__version__ = '0.12'
 
 # Initialize a logger for this module.
 logger = logging.getLogger(__name__)

guest/setup.py

@@ -51,7 +51,7 @@
       ]),
       install_requires=[
           'coloredlogs >= 5.0',
-          'negotiator-common >= 0.11',
+          'negotiator-common >= 0.12',
       ],
       classifiers=[
           'Development Status :: 4 - Beta',

host/negotiator_host/__init__.py

@@ -29,7 +29,7 @@
 from executor import ExternalCommandFailed, execute
 
 # Semi-standard module versioning.
-__version__ = '0.11'
+__version__ = '0.12'
 
 # Initialize a logger for this module.
 logger = logging.getLogger(__name__)

host/setup.py

@@ -51,7 +51,7 @@
       ]),
       install_requires=[
           'coloredlogs >= 5.0',
-          'negotiator-common >= 0.11',
+          'negotiator-common >= 0.12',
       ],
       classifiers=[
           'Development Status :: 4 - Beta',