eventlet>=0.17.4
oslo.concurrency>=2.3.0                 # Apache-2.0
oslo.config>=2.1.0                     # Apache-2.0
oslo.i18n>=1.5.0                        # Apache-2.0
oslo.log>=1.8.0                         # Apache-2.0
oslo.service>=0.6.0                     # Apache-2.0
pbr<2.0,>=1.4