Add grenade-py3 job

This adds a grenade job which uses python3 on both
the old and new side of the upgrade run. This is part
of the python3-first community wide goal for the Stein
release. The exact version of python3 used depends on
the version of the underlying distro used in devstack
on both sides of the upgrade run.

Change-Id: Icc37e24c5910f189d09bcfed6cfbd348f6c24ab2

.zuul.yaml

@@ -11,6 +11,17 @@
       - ^.*\.rst$
       - ^doc/.*$
 
+- job:
+    name: grenade-py3
+    parent: legacy-dsvm-base
+    run: playbooks/legacy/grenade-py3/run.yaml
+    post-run: playbooks/legacy/grenade-py3/post.yaml
+    timeout: 10800
+    required-projects:
+      - openstack-dev/grenade
+      - openstack-infra/devstack-gate
+    irrelevant-files: *grenade-irrelevant-files
+
 - project:
     check:
       jobs:
@@ -19,6 +30,7 @@
         - grenade-heat:
             voting: false
             irrelevant-files: *grenade-irrelevant-files
+        - grenade-py3
         - neutron-grenade-multinode:
             irrelevant-files: *grenade-irrelevant-files
         - tox-docs
@@ -27,6 +39,7 @@
             irrelevant-files: *grenade-irrelevant-files
     gate:
       jobs:
+        - grenade-py3
         - neutron-grenade:
             irrelevant-files: *grenade-irrelevant-files
         - neutron-grenade-multinode:

playbooks/legacy/grenade-py3/post.yaml

@@ -0,0 +1,15 @@
+- 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/grenade-py3/run.yaml

@@ -0,0 +1,44 @@
+- hosts: all
+  name: Copy of the neutron-grenade job using python3.
+  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-infra/devstack-gate
+              dest: devstack-gate
+          EOF
+          /usr/zuul-env/bin/zuul-cloner -m clonemap.yaml --cache-dir /opt/git \
+              git://git.openstack.org \
+              openstack-infra/devstack-gate
+        executable: /bin/bash
+        chdir: '{{ ansible_user_dir }}/workspace'
+      environment: '{{ zuul | zuul_legacy_vars }}'
+
+    - shell:
+        cmd: |
+          set -e
+          set -x
+          export PROJECTS="openstack-dev/grenade $PROJECTS"
+          export PYTHONUNBUFFERED=true
+          export DEVSTACK_GATE_TEMPEST=1
+          export DEVSTACK_GATE_GRENADE=pullup
+          export DEVSTACK_GATE_NEUTRON=1
+          export DEVSTACK_GATE_USE_PYTHON3=True
+          export BRANCH_OVERRIDE=default
+          if [ "$BRANCH_OVERRIDE" != "default" ] ; then
+              export OVERRIDE_ZUUL_BRANCH=$BRANCH_OVERRIDE
+          fi
+          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 }}'