auto-detect interpreter.

setting ANSIBLE_PYTHON_INTERPRETER to auto will use the value from the
ansible/config/base.yml

debian is not included for this release of ansible but it whould work
for centos 6,7,8 and also for ubuntu 18,20.

Patch also removes pre-gate cleanup tasks for the new plain CI images[1]

[1] http://lists.openstack.org/pipermail/openstack-discuss/2020-May/015157.html

Co-Authored-By: Jonathan Rosser <jonathan.rosser@rd.bbc.co.uk>
Change-Id: I228ac8f4e02f0d344f524e093433414290ecb67f

scripts/bootstrap-ansible.sh

@@ -55,6 +55,7 @@ export OSA_CLONE_DIR="$(pwd)"
 ANSIBLE_ROLE_FILE="$(readlink -f "${ANSIBLE_ROLE_FILE}")"
 OSA_INVENTORY_PATH="$(readlink -f inventory)"
 OSA_PLAYBOOK_PATH="$(readlink -f playbooks)"
+OSA_ANSIBLE_PYTHON_INTERPRETER="auto"
 
 # Create the ssh dir if needed
 ssh_key_create
@@ -80,13 +81,17 @@ case ${DISTRO_ID} in
         if `/bin/grep -q "stretch" /etc/os-release` && [ -f "/etc/apt/sources.list.d/security.list" ]; then
           echo "deb http://security.debian.org stretch/updates main contrib" > /etc/apt/sources.list.d/security.list
         fi
-	# NOTE(jrosser) remove this once infra debian repos are fixed for buster
+        # NOTE(jrosser) remove this once infra debian repos are fixed for buster
         if `/bin/grep -q "buster" /etc/os-release` && [ -f "/etc/apt/sources.list.d/security.list" ]; then
           echo "deb http://deb.debian.org/debian buster main" > /etc/apt/sources.list.d/default.list
           echo "deb http://deb.debian.org/debian buster-backports" main > /etc/apt/sources.list.d/backports.list
           echo "deb http://security.debian.org buster/updates main contrib" > /etc/apt/sources.list.d/security.list
           echo "deb http://deb.debian.org/debian buster-updates main" > /etc/apt/sources.list.d/updates.list
         fi
+        # NOTE(mgariepy) remove this on ansible 2.10 if debian is in the config/base.yml file
+        if `/bin/grep -q "buster" /etc/os-release`; then
+          OSA_ANSIBLE_PYTHON_INTERPRETER="/usr/bin/python3"
+        fi
         apt-get update
         DEBIAN_FRONTEND=noninteractive apt-get -y install \
           git-core curl gcc netcat \
@@ -160,6 +165,7 @@ popd
 # Write the OSA Ansible rc file
 sed "s|OSA_INVENTORY_PATH|${OSA_INVENTORY_PATH}|g" scripts/openstack-ansible.rc > /usr/local/bin/openstack-ansible.rc
 sed -i "s|OSA_PLAYBOOK_PATH|${OSA_PLAYBOOK_PATH}|g" /usr/local/bin/openstack-ansible.rc
+sed -i "s|OSA_ANSIBLE_PYTHON_INTERPRETER|${OSA_ANSIBLE_PYTHON_INTERPRETER}|g" /usr/local/bin/openstack-ansible.rc
 
 # Create openstack ansible wrapper tool
 cp -v ${OSA_WRAPPER_BIN} /usr/local/bin/openstack-ansible

scripts/openstack-ansible.rc

@@ -57,3 +57,4 @@ export ANSIBLE_STRATEGY_PLUGINS="${ANSIBLE_STRATEGY_PLUGINS:-/etc/ansible/roles/
 export ANSIBLE_CONNECTION_PLUGINS="${ANSIBLE_CONNECTION_PLUGINS:-/etc/ansible/roles/plugins/connection}"
 
 export ANSIBLE_FORCE_HANDLERS="${ANSIBLE_FORCE_HANDLERS:-True}"
+export ANSIBLE_PYTHON_INTERPRETER="${ANSIBLE_PYTHON_INTERPRETER:-OSA_ANSIBLE_PYTHON_INTERPRETER}"

zuul.d/playbooks/pre-gate-cleanup.yml

@@ -21,8 +21,6 @@
 
     - name: Cleanup gate images
       block:
-        - name: Gather variables for each operating system
-          include_vars: "{{ ansible_os_family | lower }}.yml"
 
         - name: Switch apt source from https to http
           replace:
@@ -32,28 +30,6 @@
           when:
             - ansible_distribution_release in ['bionic']
 
-        - name: Remove known problem distro packages
-          package:
-            name: "{{ gate_packages_remove }}"
-            state: absent
-
-        - name: Remove known problem pip packages
-          pip:
-            name:
-              - virtualenv
-              - tox
-              - appdirs
-              - contextlib2
-              - distlib
-              - filelock
-              - importlib_metadata
-              - importlib_resources
-              - six
-              - zipp
-              - backports
-            state: absent
-      when: ansible_os_family | lower in ['debian', 'redhat']
-
     - name: Remove package blacklist for yum/dnf
       lineinfile:
         dest: "{{ (ansible_pkg_mgr == 'dnf') | ternary('/etc/dnf/dnf.conf', '/etc/yum.conf') }}"