openstack/os-ken
Code Issues Proposed changes

flags: Inject __class__ attribute to LooseVersion

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Currently, ryu-manager uses distutils.version.LooseVersion for
"--zapi-frr-version" to parse the given version sting.
With custom type class for oslo_config.cfg.Opt, oslo_config might access
__class__ attribute for equal comparison.
But in case on Python 2, LooseVersion does not have __class__ attribute
and it causes AttributeError. (This error is not always reproduced)

This patch injects required attribute into LooseVersion and avoids this
problem.

Signed-off-by: IWASE Yusuke <iwase.yusuke0@gmail.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
This commit is contained in:
IWASE Yusuke 2017-11-02 11:26:29 +09:00 committed by FUJITA Tomonori
parent eda4940eb8
commit 5bde6ae440
1 changed files with 7 additions and 0 deletions
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7
ryu/flags.py
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@ -86,6 +86,13 @@ DEFAULT_ZSERV_ROUTER_ID = '1.1.1.1'
# should be None.
DEFAULT_ZSERV_FRR_VERSION = '0.0'
# Hack: In oslo_config.cfg.Opt, ConfigType might access __class__ attribute
# for equal comparison, but on Python 2, LooseVersion does not have __class__
# attribute and it causes AttributeError. So here inject __class__ attribute
# into LooseVersion class.
if not hasattr(LooseVersion, '__class__'):
LooseVersion.__class__ = LooseVersion
CONF.register_cli_opts([
cfg.StrOpt(
'server-host', default=DEFAULT_ZSERV_HOST,