systemd_update.yml

---
- hosts: all
  gather_facts: False

  tasks: 
    - name: get systemd version
      shell: rpm -q --queryformat %{version}-%{release} systemd
      register: version
      tags: systemd

    - name: update systemd
#      shell: yum list update systemd
      yum:
        name: systemd
        state: latest
      register: update_result
#      debug:
#        msg: "{{ inventory_hostname }} is running {{ version.stdout }}, need to be update"
      when: "{{ version.stdout | version_compare('219-19.el7_2.9','<') }}"
      tags: systemd

    - name: show result
      debug:
        var:  update_result.stdout_lines
      when: "{{ version.stdout | version_compare('219-19.el7_2.9','<') }}"
      tags: systemd

    - name: check log
      shell: tail -n 3 /var/log/messages
      register: log
      tags: log

    - name: show log 
      debug:
        msg: "{{ inventory_hostname }} log has been corrupted"
#      shell: find /run/log/journal/ -type f -name system.journal -exec mv {} {}.bak \;
      when: "'ansible' not in log.stdout"
      tags: log

    - name: restart journal service
      service:
        name: systemd-journald
        state: restarted
      tags: service