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

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

Blazar is ready with python 3 and ok to drop 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 Community-wide goal:
https://governance.openstack.org/tc/goals/selected/ussuri/drop-py27.html

Co-Authored-By: Ghanshyam Mann <gmann@ghanshyammann.com>

Change-Id: I69bd82f8a1156f2f2eb636ea96c439c0645cc102

.zuul.yaml

@@ -20,32 +20,10 @@
       - openstack/python-blazarclient
       - openstack/blazar-tempest-plugin
 
-- job:
-    name: blazar-devstack-dsvm-py35
-    parent: legacy-dsvm-base
-    irrelevant-files:
-      - ^.*\.rst$
-      - ^blazar/tests/.*$
-      - ^doc/.*$
-      - ^releasenotes/.*$
-      - ^test-requirements.txt$
-      - ^tools/.*$
-      - ^tox.ini$
-    run: playbooks/legacy/blazar-devstack-dsvm-py35/run.yaml
-    post-run: playbooks/legacy/blazar-devstack-dsvm-py35/post.yaml
-    timeout: 4200
-    required-projects:
-      - openstack/devstack
-      - openstack/devstack-gate
-      - openstack/blazar
-      - openstack/blazar-nova
-      - openstack/python-blazarclient
-      - openstack/blazar-tempest-plugin
-
 - job:
     name: blazar-devstack-dsvm-ipv6-only
-    parent: blazar-devstack-dsvm-py35
+    parent: blazar-devstack-dsvm
-    run: playbooks/legacy/blazar-devstack-dsvm-py35/run-ipv6.yaml
+    run: playbooks/legacy/blazar-devstack-dsvm/run-ipv6.yaml
     required-projects:
       - openstack/tempest
 
@@ -54,14 +32,12 @@
       - check-requirements
       - openstack-cover-jobs
       - openstack-lower-constraints-jobs
-      - openstack-python-jobs
       - openstack-python3-ussuri-jobs
       - publish-openstack-docs-pti
       - release-notes-jobs-python3
     check:
       jobs:
         - blazar-devstack-dsvm
-        - blazar-devstack-dsvm-py35
         - blazar-devstack-dsvm-ipv6-only
         - openstack-tox-pylint:
             voting: false
@@ -69,5 +45,4 @@
       queue: blazar
       jobs:
         - blazar-devstack-dsvm
-        - blazar-devstack-dsvm-py35
         - blazar-devstack-dsvm-ipv6-only

playbooks/legacy/blazar-devstack-dsvm-py35/post.yaml

@@ -1,15 +0,0 @@
-- hosts: primary
-  tasks:
-
-    - name: Copy files from {{ ansible_user_dir }}/workspace/ on node
-      synchronize:
-        src: '{{ ansible_user_dir }}/workspace/'
-        dest: '{{ zuul.executor.log_root }}'
-        mode: pull
-        copy_links: true
-        verify_host: true
-        rsync_opts:
-          - --include=/logs/**
-          - --include=*/
-          - --exclude=*
-          - --prune-empty-dirs

playbooks/legacy/blazar-devstack-dsvm-py35/run.yaml

@@ -1,65 +0,0 @@
-- hosts: all
-  name: legacy-blazar-devstack-dsvm-py35
-  tasks:
-
-    - name: Ensure legacy workspace directory
-      file:
-        path: '{{ ansible_user_dir }}/workspace'
-        state: directory
-
-    - shell:
-        cmd: |
-          set -e
-          set -x
-          cat > clonemap.yaml << EOF
-          clonemap:
-            - name: openstack/devstack-gate
-              dest: devstack-gate
-          EOF
-          /usr/zuul-env/bin/zuul-cloner -m clonemap.yaml --cache-dir /opt/git \
-              https://opendev.org \
-              openstack/devstack-gate
-        executable: /bin/bash
-        chdir: '{{ ansible_user_dir }}/workspace'
-      environment: '{{ zuul | zuul_legacy_vars }}'
-
-    - shell:
-        cmd: |
-          set -e
-          set -x
-          cat << 'EOF' >>"/tmp/dg-local.conf"
-          [[local|localrc]]
-          enable_plugin blazar https://opendev.org/openstack/blazar
-          # Swift is not ready for python3 yet
-          disable_service s-account
-          disable_service s-container
-          disable_service s-object
-          disable_service s-proxy
-          # Without Swift, c-bak cannot run (in the Gate at least)
-          disable_service c-bak
-          # Enable Tempest plugin
-          TEMPEST_PLUGINS='/opt/stack/new/blazar-tempest-plugin'
-          EOF
-        executable: /bin/bash
-        chdir: '{{ ansible_user_dir }}/workspace'
-      environment: '{{ zuul | zuul_legacy_vars }}'
-
-    - shell:
-        cmd: |
-          set -e
-          set -x
-          export DEVSTACK_GATE_USE_PYTHON3=True
-          export PYTHONUNBUFFERED=true
-          export DEVSTACK_GATE_TEMPEST=1
-          export ENABLED_SERVICES=blazar,blazar-a,blazar-m,tempest
-          export PROJECTS="openstack/blazar $PROJECTS"
-          export PROJECTS="openstack/blazar-nova $PROJECTS"
-          export PROJECTS="openstack/python-blazarclient $PROJECTS"
-          export PROJECTS="openstack/blazar-tempest-plugin $PROJECTS"
-          export DEVSTACK_GATE_TEMPEST_REGEX="blazar_tempest_plugin"
-          export TEMPEST_CONCURRENCY=1
-          cp devstack-gate/devstack-vm-gate-wrap.sh ./safe-devstack-vm-gate-wrap.sh
-          ./safe-devstack-vm-gate-wrap.sh
-        executable: /bin/bash
-        chdir: '{{ ansible_user_dir }}/workspace'
-      environment: '{{ zuul | zuul_legacy_vars }}'

playbooks/legacy/blazar-devstack-dsvm/run.yaml

@@ -1,5 +1,5 @@
 - hosts: all
-  name: Autoconverted job legacy-blazar-devstack-dsvm from old job gate-blazar-devstack-dsvm
+  name: legacy-blazar-devstack-dsvm-py35
   tasks:
 
     - name: Ensure legacy workspace directory
@@ -30,6 +30,13 @@
           cat << 'EOF' >>"/tmp/dg-local.conf"
           [[local|localrc]]
           enable_plugin blazar https://opendev.org/openstack/blazar
+          # Swift is not ready for python3 yet
+          disable_service s-account
+          disable_service s-container
+          disable_service s-object
+          disable_service s-proxy
+          # Without Swift, c-bak cannot run (in the Gate at least)
+          disable_service c-bak
           # Enable Tempest plugin
           TEMPEST_PLUGINS='/opt/stack/new/blazar-tempest-plugin'
           EOF
@@ -41,6 +48,7 @@
         cmd: |
           set -e
           set -x
+          export DEVSTACK_GATE_USE_PYTHON3=True
           export PYTHONUNBUFFERED=true
           export DEVSTACK_GATE_TEMPEST=1
           export ENABLED_SERVICES=blazar,blazar-a,blazar-m,tempest

releasenotes/notes/drop-python2-support-148148077280122c.yaml

@@ -0,0 +1,6 @@
+---
+upgrade:
+  - |
+    Python 2.7 support has been dropped. The last release of Blazar supporting
+    Python 2.7 is OpenStack Train. The minimum version of Python now supported
+    by Blazar is Python 3.6.

setup.cfg

@@ -5,8 +5,6 @@ description-file = README.rst
 license = Apache Software License
 classifiers =
     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

tox.ini

@@ -1,9 +1,11 @@
 [tox]
-envlist = py27,py36,py37,pep8
+envlist = py36,py37,pep8
-minversion = 2.0
+minversion = 3.1.1
 skipsdist = True
+ignore_basepython_conflict = True
 
 [testenv]
+basepython = python3
 usedevelop = True
 whitelist_externals = rm
 install_command = pip install -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master} {opts} {packages}
@@ -18,7 +20,6 @@ commands =
 sitepackages = False
 
 [testenv:cover]
-basepython = python3
 setenv =
   {[testenv]setenv}
   PYTHON=coverage run --source blazar --parallel-mode
@@ -31,15 +32,12 @@ commands =
   coverage report
 
 [testenv:pep8]
-basepython = python3
 commands = flake8 {posargs}
 
 [testenv:venv]
-basepython = python3
 commands = {posargs}
 
 [testenv:docs]
-basepython = python3
 deps =
     -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
     -r{toxinidir}/requirements.txt
@@ -50,7 +48,6 @@ commands =
     python setup.py build_sphinx
 
 [testenv:pdf-docs]
-basepython = python3
 deps = {[testenv:docs]deps}
 whitelist_externals = make
 commands =
@@ -58,7 +55,6 @@ commands =
     make -C doc/build/pdf
 
 [testenv:genconfig]
-basepython = python3
 commands = oslo-config-generator --config-file=etc/blazar/blazar-config-generator.conf
 
 [flake8]
@@ -78,17 +74,14 @@ max-complexity=17
 local-check-factory = blazar.hacking.checks.factory
 
 [testenv:pylint]
-basepython = python3
 deps = -r{toxinidir}/requirements.txt
        pylint==1.9.1
 commands = pylint blazar
 
 [testenv:releasenotes]
-basepython = python3
 commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 
 [testenv:api-ref]
-basepython = python3
 # This environment is called from CI scripts to test and publish
 # the API Ref to docs.openstack.org.
 commands =
@@ -100,7 +93,6 @@ commands =
     oslopolicy-sample-generator --config-file etc/blazar/blazar-policy-generator.conf
 
 [testenv:lower-constraints]
-basepython = python3
 deps =
   -c{toxinidir}/lower-constraints.txt
   -r{toxinidir}/test-requirements.txt
@@ -109,7 +101,6 @@ deps =
 # This environment can be used to quickly validate that all needed system
 # packages required to successfully execute test targets are installed
 [testenv:bindep]
-basepython = python3
 # Do not install any requirements. We want this to be fast and work even if
 # system dependencies are missing, since it's used to tell you what system
 # dependencies are missing! This also means that bindep must be installed