common: assert python2 interpreter on OL/RHEL7

Author: Rendanic

changelogs/fragments/assert_python.yml

@@ -0,0 +1,3 @@
+---
+minor_changes:
+  - "common: assert python2 interpreter on OL/RHEL7 (oravirt#330)"

roles/common/tasks/main.yml

@@ -1,5 +1,18 @@
 # Common playbook - sets up the host generic stuff
 ---
+# ansible-oracle needs python2 on some distributions for later installation of cx_Oracle
+- name: Check for correct Ansible Interpreter on RHEL/OL 7
+  ansible.builtin.assert:
+    quiet: true
+    that:
+      - discovered_interpreter_python == '/usr/bin/python'
+    fail_msg: Set interpreter_python to /usr/bin/python
+  when:
+    - ansible_distribution in('OracleLinux', 'RedHat')
+    - ansible_distribution_major_version == '7'
+    - interpreter_python is not defined
+  tags:
+    - assert
 
 - name: Check for correct Ansible Version (>= 2.8)
   ansible.builtin.assert: