Update main.yml

  block:

    - name: Ensure hostname set

      hostname: name={{ inventory_hostname }}

      hostname: name={{ ansible_fqdn }}

    - name: Ensure hostname is in /etc/hosts

      lineinfile:

        dest=/etc/hosts

        regexp="^{{ ip | default(ansible_default_ipv4.address) }}.+$"

        line="{{ ip | default(ansible_default_ipv4.address) }} {{ inventory_hostname }} {{ ansible_hostname }}"

        line="{{ ip | default(ansible_default_ipv4.address) }} {{ ansible_fqdn }} {{ inventory_hostname }} {{ ansible_hostname }}"

  tags: hostname