WIP: add-build-sshkey: add centos/rhel-8 support

Assues we install libselinux on these platforms as otherwise Ansible
could choke with:

TASK [add-build-sshkey : Enable access via build key on all nodes]
"msg": "Aborting, target uses selinux but python bindings (libselinux-python) aren't installed!"

Change-Id: I91ec606b5b4e8dce7b71912fdc5890ac6aaf20ef

roles/add-build-sshkey/defaults/main.yaml

@@ -0,0 +1 @@
+add_build_sshkey_system_packages: []

roles/add-build-sshkey/tasks/main.yaml

@@ -1,3 +1,14 @@
+- name: Include OS specific variables
+  include_vars: "{{ item }}"
+  failed_when: false
+  loop:
+      - "family-{{ ansible_os_family | lower }}.yml"
+      - "family-{{ ansible_os_family | lower }}-{{ ansible_distribution_major_version | lower }}.yml"
+      - "{{ ansible_distribution | lower }}.yml"
+      - "{{ ansible_distribution | lower }}-{{ ansible_distribution_major_version | lower }}.yml"
+      - "{{ ansible_distribution | lower }}-{{ ansible_distribution_version.split('.')[0:2] | join('-') | lower }}.yml"
+      - "{{ ansible_distribution | lower }}-{{ ansible_distribution_version.split('.')[0:3] | join('-') | lower }}.yml"
+
 - name: Check to see if ssh key was already created for this build
   stat:
     path: "{{ zuul_temp_ssh_key }}"
@@ -6,6 +17,11 @@
   run_once: true
   failed_when: false
 
+- name: Install required packages
+  when: add_build_sshkey_system_packages
+  package:
+    name: "{{ add_build_sshkey_system_packages }}"
+
 - name: Create a new key in workspace based on build UUID
   include: create-key-and-replace.yaml
   when:

roles/add-build-sshkey/vars/family-redhat-8.yml

@@ -0,0 +1,2 @@
+add_build_sshkey_system_packages:
+  - python3-libselinux

zuul-tests.d/general-roles-jobs.yaml

@@ -10,6 +10,16 @@
         - public_key: |
             ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQChDsP7zEq1JxPLb0Zqj43LIlVoXONCQ1Ko5i9ih/4xm6p0Jn00kpCoVQMb4X2Zys1vWTgpd+r9C/ZoYPFeWuQ8rPCbw4VsocMdwkz7mCPkMDVyPwERjRgt1sTl9WGgtlm2zq/76bmEpuY6PM+nFtJS7UE4XlfoHFK3pR/hgMFi8CX/ILAdtpU96dW2vmXkUt5yj05GHMXKeSU+B5pUEsERgQknH3JBdc/jvKv9dg5zt0jPM6hu5iwgIbMNHydxg4huFO6gKuP+mCNQctK23VMxVXSOYivx8qxu4uzGnBZna01Gi8mY5An4mIQTdcO3KpppOceoDjfEFIOiOnBVoggH testkey
 
+
+- job:
+    name: zuul-jobs-test-add-build-sshkey
+    description: Test the add-build-sshkey role
+    files:
+      - roles/add-build-sshkey/.*
+    #run: test-playbooks/base-roles/add-build-sshkey-test.yaml
+    vars:
+      role_name: add-build-sshkey
+
 - job:
     name: zuul-jobs-test-add-gpgkey
     description: Test the add-gpgkey role