pkg_resources.ContextualVersionConflict: (oslo.i18n 1.3.1 (/usr/local/lib/python2.7/dist-packages), Requirement.parse('oslo.i18n>=1.5.0'), set(['oslo.utils']))

[Eduard Biceri-Matei]

Trying to install devstack stable/juno 2014.2.2

C-sch service fails to start

home/devstack$ /usr/local/bin/cinder-scheduler --config-file /etc/cinder/cinder.conf & echo $! >/opt/stack/status/stack/c-sch.pid; fg || echo "c-sch failed to start" | tee "/opt/stack/status/stack/c-sch.failure"
[1] 40391
/usr/local/bin/cinder-scheduler --config-file /etc/cinder/cinder.conf
Traceback (most recent call last):
  File "/usr/local/bin/cinder-scheduler", line 4, in <module>
    __import__('pkg_resources').require('cinder==2014.2.2')
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 3057, in <module>
    working_set = WorkingSet._build_master()
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 641, in _build_master
    return cls._build_from_requirements(__requires__)
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 654, in _build_from_requirements
    dists = ws.resolve(reqs, Environment())
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 832, in resolve
    raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.ContextualVersionConflict: (oslo.i18n 1.3.1 (/usr/local/lib/python2.7/dist-packages), Requirement.parse('oslo.i18n>=1.5.0'), set(['oslo.utils']))
c-sch failed to start

Local.conf
[[local|localrc]]
HOST_IP=172.20.52.251
FLAT_INTERFACE=pubbr
FIXED_RANGE=172.20.52.0/26
FIXED_NETWORK_SIZE=62
FLOATING_RANGE=172.20.52.0/26
MULTI_HOST=1
LOGFILE=/opt/stack/logs/stack.sh.log
ADMIN_PASSWORD=***
MYSQL_PASSWORD=***
RABBIT_PASSWORD=***
SERVICE_PASSWORD=***
SERVICE_TOKEN=***

CINDER_BRANCH=2014.2.2
GLANCE_BRANCH=2014.2.2
HEAT_BRANCH=2014.2.2
HORIZON_BRANCH=2014.2.2
KEYSTONE_BRANCH=2014.2.2
NEUTRON_BRANCH=2014.2.2
NOVA_BRANCH=2014.2.2
SWIFT_BRANCH=2014.2.2
TROVE_BRANCH=2014.2.2

DATABASE_TYPE=mysql
SERVICE_HOST=172.20.52.252
MYSQL_HOST=172.20.52.252
RABBIT_HOST=172.20.52.252
GLANCE_HOSTPORT=172.20.52.252:9292
ENABLED_SERVICES=n-cpu,n-net,n-api,c-sch,c-api,c-vol

[Philippe Ploegaert (philippe-ploegaert)]

Issues occurs when installing 2nd node - first node is ok.

On 2nd node we install less components:
ENABLED_SERVICES=n-cpu,n-net,n-api,c-sch,c-api,c-vol

Further debugging showed oslo-utils 1.5.0 gets installed,
manually installing oslo-utils 1.4.0 fixes the cinder startup issue.

Log file shows:
2015-04-30 01:08:10.085 | Collecting keystonemiddleware<1.4.0,>=1.0.0
2015-04-30 01:08:15.162 | /usr/local/lib/python2.7/dist-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:79: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
2015-04-30 01:08:15.162 | InsecurePlatformWarning
2015-04-30 01:08:15.287 | Downloading keystonemiddleware-1.3.1-py2.py3-none-any.whl (74kB)
2015-04-30 01:08:15.349 | Requirement already satisfied (use --upgrade to upgrade): WebOb>=1.2.3 in /usr/lib/python2.7/dist-packages (from keystonemiddleware<1.4.0,>=1.0.0)
2015-04-30 01:08:15.350 | Collecting six>=1.7.0 (from keystonemiddleware<1.4.0,>=1.0.0)
2015-04-30 01:08:15.371 | Using cached six-1.9.0-py2.py3-none-any.whl
2015-04-30 01:08:15.379 | Collecting pycadf>=0.6.0 (from keystonemiddleware<1.4.0,>=1.0.0)
2015-04-30 01:08:15.431 | Downloading pycadf-0.9.0-py2-none-any.whl (49kB)
2015-04-30 01:08:15.471 | Collecting oslo.utils>=1.1.0 (from keystonemiddleware<1.4.0,>=1.0.0)
2015-04-30 01:08:15.501 | Downloading oslo.utils-1.5.0-py2.py3-none-any.whl (56kB)

[Sean McGinnis (sean-mcginnis)]

Automatically unassigning due to inactivity.

[Juan Pedro Paredes (juampe)]

To fix first uninstall the old package
pip uninstall oslo.i18n