ryu 4.2.1 breaks python 2.7 environments

[Bob Ball]

ryu >= 4.1 is broken for Python 2.7 environments - the following commit requires ovs>=2.6.0.dev0 for all environments:
https://github.com/osrg/ryu/commit/b8cb2d22aab1b761e9e2de2df1a93cc60ed60dfa

Contrastingly, upper-constraints prevents ovs>2.5.0 in Python 2.7 environments:
https://git.openstack.org/cgit/openstack/requirements/tree/upper-constraints.txt#n229

This is showing up as a breakage in the XenServer Neutron CI (currently on internal testing before commenting externally): pkg_resources.ContextualVersionConflict: (ovs 2.5.0 (/usr/local/lib/python2.7/dist-packages), Requirement.parse('ovs>=2.6.0.dev0'), set(['ryu']))

Example failure logs at:
http://dd6b71949550285df7dc-dda4e480e005aaa13ec303551d2d8155.r49.cf1.rackcdn.com/05/243105/11/2000/logs/screen-q-agt.txt.gz

[YAMAMOTO Takashi (yamamoto)]

either bump ovs for 2.7, or clamp ryu for 2.7?

[Bob Ball (bob-ball)]

Seems that changes to requirements don't get added to a bug report against neutron :)

Fix proposed at https://review.openstack.org/320027

[YAMAMOTO Takashi (yamamoto)]

https://sourceforge.net/p/ryu/mailman/message/35113365/

[YAMAMOTO Takashi (yamamoto)]

the ovs requirement in question was removed on ryu master. [1]
and a patch release including the change is now available on pypi. [2]
so you can now add !=4.2.1 to requirements and use 4.2.2.

[1] https://github.com/osrg/ryu/commit/9e3aaaf2d812a08201ff615bec0317d80840f094
[2] https://pypi.python.org/pypi/ryu/4.2.2

[huan (huan-xie)]

Thanks Yamamoto, will change ryu to 4.2.2

[huan (huan-xie)]

Change ryu to 4.2.2 fixed the problem, see patchset https://review.openstack.org/#/c/320027/