tasks: Use PIP distribution packages for openSUSE and Ubuntu

Supported openSUSE and Ubuntu distributions ship with relatively new
pip, setuptools, virtualenv and wheel packages so we can use that in
favor of the PIP ones. This also avoids running the pip_install role
on these hosts making the deployment somewhat faster.

Implements: blueprint openstack-distribution-packages
Change-Id: I424ca9ca71253cc4e673065f35c9b939942eeda3

defaults/main.yml

@@ -131,6 +131,9 @@ global_environment_variables: {}
 # Set the default mode for the /etc/cron.d/sysstat file
 openstack_host_sysstat_cron_mode: '0755'
 
+# Distribution packages required for using pip on the host
+openstack_host_pip_packages: "{{ _openstack_host_pip_packages | default([]) }}"
+
 ## Default repositories data
 # Set default mirror for CentOS repositories
 # NOTE(mhayden): Ensure that the full path to the 'centos' directory is used.

releasenotes/notes/use-pip-distro-packages-2505f6e630a94850.yaml

@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    Supported openSUSE and Ubuntu hosts ship with new enough pip,
+    setuptools, virtualenv and wheel packages which are now being
+    used in favor of the PIP ones.

tasks/main.yml

@@ -72,9 +72,20 @@
 - name: Run the pip install role
   include_role:
     name: pip_install
+  when: not openstack_host_use_distro_pip
   tags:
     - openstack_hosts-install
 
+- name: Install PIP distribution packages
+  package:
+    name: "{{ openstack_host_pip_packages }}"
+    state: "{{ openstack_hosts_package_state }}"
+  when: openstack_host_use_distro_pip
+  register: install_packages
+  until: install_packages | success
+  retries: 5
+  delay: 2
+
 - include_tasks: openstack_authorized_keys.yml
   tags:
     - openstack_hosts-config

vars/redhat-7.yml

@@ -22,6 +22,8 @@ openstack_host_module_file: /etc/modules-load.d/openstack-ansible.conf
 
 openstack_host_sysstat_cron_mode: '0600'
 
+openstack_host_use_distro_pip: false
+
 ## Kernel modules loaded on hosts
 openstack_host_kernel_modules:
   - name: 8021q

vars/suse-42.yml

@@ -27,6 +27,13 @@ openstack_host_module_file: /etc/modules-load.d/openstack-ansible.conf
 
 openstack_host_sysstat_cron_mode: '0644'
 
+openstack_host_use_distro_pip: true
+_openstack_host_pip_packages:
+  - python-pip
+  - python-setuptools
+  - python-virtualenv
+  - python-wheel
+
 ## Kernel modules loaded on hosts
 openstack_host_kernel_modules:
   - name: 8021q

vars/ubuntu-16.04.yml

@@ -16,6 +16,17 @@
 ## APT Cache Options
 cache_timeout: 600
 
+openstack_host_use_distro_pip: true
+_openstack_host_pip_packages:
+  - python-pip
+  - python3-pip
+  - python-setuptools
+  - python3-setuptools
+  - python-virtualenv
+  - python3-virtualenv
+  - python-wheel
+  - python3-wheel
+
 ## Defined required kernel
 openstack_host_required_kernel: 4.4.0-0-generic
 openstack_host_sysstat_file: /etc/default/sysstat