Drop python 2.7 support and testing

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

ironic-staging-drivers is ready with python 3 and ok to drop the
python 2.7 support.

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://review.opendev.org/#/c/691178/

Change-Id: Iab168e51cdfed11a3982da717e6cb40dbcaabfd5

.zuul.yaml

@@ -13,14 +13,14 @@
     required-projects:
       - openstack/devstack-gate
       - openstack/ironic
+      - openstack/ironic-python-agent-builder
       - x/ironic-staging-drivers
 
 - project:
     vars:
       rtd_webhook_id: '44747'
     templates:
-      - openstack-python-jobs
-      - openstack-python3-train-jobs
+      - openstack-python3-ussuri-jobs
       - openstack-lower-constraints-jobs
       - docs-on-readthedocs
       - check-requirements

playbooks/legacy/ironic-staging-drivers-dsvm-all-drivers/run.yaml

@@ -47,9 +47,11 @@
           export DEVSTACK_GATE_NEUTRON=1
           export DEVSTACK_GATE_VIRT_DRIVER=ironic
           export DEVSTACK_GATE_IRONIC_DRIVER=ipmi
+          export DEVSTACK_GATE_USE_PYTHON3=True
           export BRANCH_OVERRIDE=default
           export PROJECTS="openstack/ironic $PROJECTS"
           export PROJECTS="x/ironic-staging-drivers $PROJECTS"
+          export PROJECTS="openstack/ironic-python-agent-builder $PROJECTS"
           if [ "$BRANCH_OVERRIDE" != "default" ] ; then
               export OVERRIDE_ZUUL_BRANCH=$BRANCH_OVERRIDE
           fi

releasenotes/notes/drop-py-2-7-d93c0bafe22119d6.yaml

@@ -0,0 +1,6 @@
+---
+upgrade:
+  - |
+    Python 2.7 support has been dropped. Last release of ironic-staging-drivers
+    to support Python 2.7 is OpenStack Train. The minimum version of Python now
+    supported by ironic-staging-drivers is Python 3.6.

setup.cfg

@@ -13,8 +13,6 @@ 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

test-requirements.txt

@@ -8,7 +8,6 @@ flake8-import-order==0.11 # LGPLv3
 coverage!=4.4,>=4.0 # Apache-2.0
 doc8>=0.6.0 # Apache-2.0
 python-subunit>=1.0.0 # Apache-2.0/BSD
-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;python_version>='3.4' # BSD
 oslotest>=3.2.0 # Apache-2.0
 testscenarios>=0.4 # Apache-2.0/BSD

tox.ini

@@ -1,9 +1,10 @@
 [tox]
 minversion = 1.8
 skipsdist = True
-envlist = py3,py27,pep8
+envlist = py3,pep8
 
 [testenv]
+basepython = python3
 usedevelop = True
 install_command = pip install -U {opts} {packages}
 setenv = VIRTUAL_ENV={envdir}
@@ -20,17 +21,14 @@ commands =
 passenv = http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY
 
 [testenv:pep8]
-basepython = python3
 commands =
     flake8 {posargs}
     doc8 README.rst CONTRIBUTING.rst HACKING.rst doc/source
 
 [testenv:venv]
-basepython = python3
 commands = {posargs}
 
 [testenv:cover]
-basepython = python3
 setenv =
     VIRTUAL_ENV={envdir}
     LANGUAGE=en_US
@@ -43,15 +41,12 @@ commands =
     coverage html -d ./cover --omit='*tests*'
 
 [testenv:docs]
-basepython = python3
 commands = python setup.py build_sphinx
 
 [testenv:debug]
-basepython = python3
 commands = oslo_debug_helper {posargs}
 
 [testenv:releasenotes]
-basepython = python3
 commands = sphinx-build -a -E -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 
 [flake8]
@@ -67,7 +62,6 @@ max-complexity=17
 enable-extensions=H106,H203,H904
 
 [testenv:lower-constraints]
-basepython = python3
 deps =
   -c{toxinidir}/lower-constraints.txt
   -r{toxinidir}/test-requirements.txt