#!/usr/bin/ansible-playbook
---
- hosts: sl-7*
  vars:
    releasever: 7.5
  tasks:
  - name: "Get current release version"
    slurp:
      src: /etc/yum/vars/slreleasever
    register: current_slreleasever
  - block:
    - name: "Set slreleasever"
      copy:
        dest: /etc/yum/vars/slreleasever
        content: "{{ releasever }}{{'\n'}}"
    - name: "Clear yum cache"
      file:
        path: /var/cache/yum/x86_64
        state: absent
    - name: "Upgrade"
      yum:
        name: '*'
        releasever: "{{ releasever }}"
        state: latest
    when:
    - current_slreleasever.content | b64decode != releasever ~ "\n"
    - current_slreleasever.content | b64decode != "7x\n"