[ussuri][goal] Drop python 2.7 support and testing

OpenStack is dropping the py2.7 support in ussuri cycle.

Complete discussion & schedule can be found in
- http://lists.openstack.org/pipermail/openstack-discuss/2019-October/010142.html
- https://etherpad.openstack.org/p/drop-python2-support

Ussuri Communtiy-wide goal:
https://governance.openstack.org/tc/goals/selected/ussuri/drop-py27.html

Parent tox py36/py37 jobs to openstack-tox-py36/37 so that the correct
interpreter is installed.

Change-Id: I14a01f0a9989195e30c3ed0dadec35490f41bd48

.zuul.yaml

@@ -1,146 +1,144 @@
 - project:
     templates:
       - check-requirements
-      - lib-forward-testing
       - lib-forward-testing-python3
       - openstack-cover-jobs
-      - openstack-python-jobs
       - openstack-python3-train-jobs
       - periodic-stable-jobs
       - publish-openstack-docs-pti
       - release-notes-jobs-python3
     check:
       jobs:
-        - tooz-tox-py27-etcd
+        - tooz-tox-py37-etcd
         - tooz-tox-py36-etcd
-        - tooz-tox-py27-etcd3
+        - tooz-tox-py37-etcd3
         - tooz-tox-py36-etcd3
-        - tooz-tox-py27-etcd3gw
+        - tooz-tox-py37-etcd3gw
         - tooz-tox-py36-etcd3gw
-        - tooz-tox-py27-zookeeper
+        - tooz-tox-py37-zookeeper
         - tooz-tox-py36-zookeeper
-        - tooz-tox-py27-redis
+        - tooz-tox-py37-redis
         - tooz-tox-py36-redis
-        - tooz-tox-py27-sentinel
+        - tooz-tox-py37-sentinel
         - tooz-tox-py36-sentinel
-        - tooz-tox-py27-memcached
+        - tooz-tox-py37-memcached
         - tooz-tox-py36-memcached
-        - tooz-tox-py27-postgresql
+        - tooz-tox-py37-postgresql
         - tooz-tox-py36-postgresql
-        - tooz-tox-py27-mysql
+        - tooz-tox-py37-mysql
         - tooz-tox-py36-mysql
-        - tooz-tox-py27-consul
+        - tooz-tox-py37-consul
         - tooz-tox-py36-consul
     gate:
       jobs:
-        - tooz-tox-py27-etcd
+        - tooz-tox-py37-etcd
         - tooz-tox-py36-etcd
-        - tooz-tox-py27-etcd3
+        - tooz-tox-py37-etcd3
         - tooz-tox-py36-etcd3
-        - tooz-tox-py27-etcd3gw
+        - tooz-tox-py37-etcd3gw
         - tooz-tox-py36-etcd3gw
-        - tooz-tox-py27-zookeeper
+        - tooz-tox-py37-zookeeper
         - tooz-tox-py36-zookeeper
-        - tooz-tox-py27-redis
+        - tooz-tox-py37-redis
         - tooz-tox-py36-redis
-        - tooz-tox-py27-sentinel
+        - tooz-tox-py37-sentinel
         - tooz-tox-py36-sentinel
-        - tooz-tox-py27-memcached
+        - tooz-tox-py37-memcached
         - tooz-tox-py36-memcached
-        - tooz-tox-py27-postgresql
+        - tooz-tox-py37-postgresql
         - tooz-tox-py36-postgresql
-        - tooz-tox-py27-mysql
+        - tooz-tox-py37-mysql
         - tooz-tox-py36-mysql
-        - tooz-tox-py27-consul
+        - tooz-tox-py37-consul
         - tooz-tox-py36-consul
 
 - job:
-    name: tooz-tox-py27-consul
+    name: tooz-tox-py37-consul
-    parent: openstack-tox
+    parent: openstack-tox-py37
     description: |
-      Run tests using ``py27-consul`` environment.
+      Run tests using ``py37-consul`` environment.
     vars:
       tox_envlist: mysql-python
 
 - job:
-    name: tooz-tox-py27-etcd
+    name: tooz-tox-py37-etcd
-    parent: openstack-tox
+    parent: openstack-tox-py37
     description: |
-      Run tests using ``py27-etcd`` environment.
+      Run tests using ``py37-etcd`` environment.
     vars:
-      tox_envlist: py27-etcd
+      tox_envlist: py37-etcd
 
 - job:
-    name: tooz-tox-py27-etcd3
+    name: tooz-tox-py37-etcd3
-    parent: openstack-tox
+    parent: openstack-tox-py37
     description: |
-      Run tests using ``py27-etcd3`` environment.
+      Run tests using ``py37-etcd3`` environment.
     vars:
-      tox_envlist: py27-etcd3
+      tox_envlist: py37-etcd3
 
 - job:
-    name: tooz-tox-py27-etcd3gw
+    name: tooz-tox-py37-etcd3gw
-    parent: openstack-tox
+    parent: openstack-tox-py37
     description: |
-      Run tests using ``py27-etcd3gw`` environment.
+      Run tests using ``py37-etcd3gw`` environment.
     vars:
-      tox_envlist: py27-etcd3gw
+      tox_envlist: py37-etcd3gw
 
 - job:
-    name: tooz-tox-py27-memcached
+    name: tooz-tox-py37-memcached
-    parent: openstack-tox
+    parent: openstack-tox-py37
     description: |
-      Run tests using ``py27-memcached`` environment.
+      Run tests using ``py37-memcached`` environment.
     vars:
-      tox_envlist: py27-memcached
+      tox_envlist: py37-memcached
 
 - job:
-    name: tooz-tox-py27-mysql
+    name: tooz-tox-py37-mysql
-    parent: openstack-tox
+    parent: openstack-tox-py37
     description: |
-      Run tests using ``py27-mysql`` environment.
+      Run tests using ``py37-mysql`` environment.
     vars:
-      tox_envlist: py27-mysql
+      tox_envlist: py37-mysql
 
 - job:
-    name: tooz-tox-py27-postgresql
+    name: tooz-tox-py37-postgresql
-    parent: openstack-tox
+    parent: openstack-tox-py37
     description: |
-      Run tests using ``py27-postgresql`` environment.
+      Run tests using ``py37-postgresql`` environment.
     vars:
-      tox_envlist: py27-postgresql
+      tox_envlist: py37-postgresql
 
 - job:
-    name: tooz-tox-py27-redis
+    name: tooz-tox-py37-redis
-    parent: openstack-tox
+    parent: openstack-tox-py37
     description: |
-      Run tests using ``py27-redis`` environment.
+      Run tests using ``py37-redis`` environment.
     vars:
-      tox_envlist: py27-redis
+      tox_envlist: py37-redis
     pre-run:
       - playbooks/stop-redis.yaml
 
 - job:
-    name: tooz-tox-py27-sentinel
+    name: tooz-tox-py37-sentinel
-    parent: openstack-tox
+    parent: openstack-tox-py37
     description: |
-      Run tests using ``py27-sentinel`` environment.
+      Run tests using ``py37-sentinel`` environment.
     vars:
-      tox_envlist: py27-sentinel
+      tox_envlist: py37-sentinel
     pre-run:
       - playbooks/stop-redis.yaml
 
 - job:
-    name: tooz-tox-py27-zookeeper
+    name: tooz-tox-py37-zookeeper
-    parent: openstack-tox
+    parent: openstack-tox-py37
     description: |
-      Run tests using ``py27-zookeeper`` environment.
+      Run tests using ``py37-zookeeper`` environment.
     vars:
-      tox_envlist: py27-zookeeper
+      tox_envlist: py37-zookeeper
 
 - job:
     name: tooz-tox-py36-consul
-    parent: openstack-tox
+    parent: openstack-tox-py36
     description: |
       Run tests using ``py36-consul`` environment.
     vars:
@@ -148,7 +146,7 @@
 
 - job:
     name: tooz-tox-py36-etcd
-    parent: openstack-tox
+    parent: openstack-tox-py36
     description: |
       Run tests using ``py36-etcd`` environment.
     vars:
@@ -156,7 +154,7 @@
 
 - job:
     name: tooz-tox-py36-etcd3
-    parent: openstack-tox
+    parent: openstack-tox-py36
     description: |
       Run tests using ``py36-etcd3`` environment.
     vars:
@@ -164,7 +162,7 @@
 
 - job:
     name: tooz-tox-py36-etcd3gw
-    parent: openstack-tox
+    parent: openstack-tox-py36
     description: |
       Run tests using ``py36-etcd3gw`` environment.
     vars:
@@ -172,7 +170,7 @@
 
 - job:
     name: tooz-tox-py36-memcached
-    parent: openstack-tox
+    parent: openstack-tox-py36
     description: |
       Run tests using ``py36-memcached`` environment.
     vars:
@@ -180,7 +178,7 @@
 
 - job:
     name: tooz-tox-py36-mysql
-    parent: openstack-tox
+    parent: openstack-tox-py36
     description: |
       Run tests using ``py36-mysql`` environment.
     vars:
@@ -188,7 +186,7 @@
 
 - job:
     name: tooz-tox-py36-postgresql
-    parent: openstack-tox
+    parent: openstack-tox-py36
     description: |
       Run tests using ``py36-postgresql`` environment.
     vars:
@@ -196,7 +194,7 @@
 
 - job:
     name: tooz-tox-py36-redis
-    parent: openstack-tox
+    parent: openstack-tox-py36
     description: |
       Run tests using ``py36-redis`` environment.
     vars:
@@ -206,7 +204,7 @@
 
 - job:
     name: tooz-tox-py36-sentinel
-    parent: openstack-tox
+    parent: openstack-tox-py36
     description: |
       Run tests using ``py36-sentinel`` environment.
     vars:
@@ -216,7 +214,7 @@
 
 - job:
     name: tooz-tox-py36-zookeeper
-    parent: openstack-tox
+    parent: openstack-tox-py36
     description: |
       Run tests using ``py36-zookeeper`` environment.
     vars:

doc/requirements.txt

@@ -1,5 +1,4 @@
-sphinx!=1.6.6,!=1.6.7,>=1.6.2,<2.0.0;python_version=='2.7' # BSD
+sphinx!=1.6.6,!=1.6.7,>=1.6.2,!=2.1.0 # BSD
-sphinx!=1.6.6,!=1.6.7,>=1.6.2,!=2.1.0;python_version>='3.4' # BSD
 openstackdocstheme>=1.11.0 # Apache-2.0
 reno>=1.8.0 # Apache-2.0
 

releasenotes/notes/drop-python-2-7-73d3113c69d724d6.yaml

@@ -0,0 +1,5 @@
+---
+upgrade:
+  - |
+    Python 2.7 support has been dropped. The minimum version of Python now
+    supported by tooz is Python 3.6.

requirements.txt

@@ -4,12 +4,10 @@
 pbr>=1.6 # Apache-2.0
 stevedore>=1.16.0 # Apache-2.0
 six>=1.9.0 # MIT
-enum34>=1.0.4;python_version=='2.7' or python_version=='2.6' or python_version=='3.3' # BSD
 voluptuous>=0.8.9 # BSD License
 msgpack>=0.4.0 # Apache-2.0
 fasteners>=0.7 # Apache-2.0
 tenacity>=3.2.1  # Apache-2.0
-futures>=3.0;python_version=='2.7' or python_version=='2.6' # BSD
 futurist>=1.2.0 # Apache-2.0
 oslo.utils>=3.15.0 # Apache-2.0
 oslo.serialization>=1.10.0 # Apache-2.0

setup.cfg

@@ -6,6 +6,7 @@ summary = Coordination library for distributed systems.
 description-file = README.rst
 license = Apache-2
 home-page = https://docs.openstack.org/tooz/latest/
+python-requires = >=3.6
 classifier =
     Environment :: OpenStack
     Intended Audience :: Developers
@@ -13,11 +14,11 @@ classifier =
     License :: OSI Approved :: Apache Software License
     Operating System :: POSIX :: Linux
     Programming Language :: Python
-    Programming Language :: Python :: 2
-    Programming Language :: Python :: 2.7
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3 :: Only
+    Programming Language :: Python :: Implementation :: CPython
     Topic :: System :: Distributed Computing
 
 [files]
@@ -64,5 +65,3 @@ memcached =
   pymemcache!=1.3.0,>=1.2.9 # Apache 2.0 License
 ipc =
   sysv-ipc>=0.6.8 # BSD License
-[wheel]
-universal = 1

tox.ini

@@ -1,8 +1,10 @@
 [tox]
 minversion = 3.1.0
-envlist = py27,py37,py{27,36}-{zookeeper,redis,sentinel,memcached,postgresql,mysql,consul,etcd,etcd3,etcd3gw},pep8
+envlist = py37,py{36,37}-{zookeeper,redis,sentinel,memcached,postgresql,mysql,consul,etcd,etcd3,etcd3gw},pep8
+ignore_basepython_conflict = True
 
 [testenv]
+basepython = python3
 # We need to install a bit more than just `test-requirements' because those drivers have
 # custom tests that we always run
 deps = .[zake,ipc,memcached,mysql,etcd,etcd3,etcd3gw]
@@ -36,17 +38,12 @@ commands =
     {toxinidir}/run-tests.sh stestr run "{posargs}"
     {toxinidir}/run-examples.sh
 
-[testenv:py27]
-basepython = python2.7
-
 [testenv:venv]
-basepython = python3
 # This target is used by the gate go run Sphinx to build the doc
 deps = {[testenv:docs]deps}
 commands = {posargs}
 
 [testenv:cover]
-basepython = python3
 deps = {[testenv]deps}
 setenv = {[testenv]setenv}
     PYTHON=coverage run --source tooz --parallel-mode
@@ -58,13 +55,11 @@ commands =
     coverage xml -o cover/coverage.xml
 
 [testenv:docs]
-basepython = python3
 deps = -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -W -b html doc/source doc/build/html
 
 [testenv:pep8]
-basepython = python3
+deps = hacking<2.1,>=2.0
-deps = hacking<0.13,>=0.12
       doc8
 commands =
     flake8
@@ -75,6 +70,5 @@ exclude=.venv,.git,.tox,dist,*egg,*.egg-info,build,examples,doc
 show-source = True
 
 [testenv:releasenotes]
-basepython = python3
 deps = -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html